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wind_turbine_model_mod.f90 @ 4848

Last change on this file since 4848 was 4843, checked in by raasch, 4 years ago
local namelist parameter added to switch off the module although the respective module namelist appears in the namelist file, further copyright updates
Property svn:keywords set to `Id`
File size: 147.3 KB

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[1820]	1	!> @file wind_turbine_model_mod.f90
[4497]	2	!--------------------------------------------------------------------------------------------------!
[2696]	3	! This file is part of the PALM model system.
[1819]	4	!
[4497]	5	! PALM is free software: you can redistribute it and/or modify it under the terms of the GNU General
	6	! Public License as published by the Free Software Foundation, either version 3 of the License, or
	7	! (at your option) any later version.
[1819]	8	!
[4497]	9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
	10	! implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
	11	! Public License for more details.
[1819]	12	!
[4497]	13	! You should have received a copy of the GNU General Public License along with PALM. If not, see
	14	! <http://www.gnu.org/licenses/>.
[1819]	15	!
[4828]	16	! Copyright 2009-2021 Carl von Ossietzky Universitaet Oldenburg
	17	! Copyright 1997-2021 Leibniz Universitaet Hannover
[4497]	18	!--------------------------------------------------------------------------------------------------!
[1819]	19	!
[4497]	20	!
[1819]	21	! Current revisions:
	22	! -----------------
[4843]	23	!
	24	!
[1913]	25	! Former revisions:
	26	! -----------------
	27	! $Id: wind_turbine_model_mod.f90 4843 2021-01-15 15:22:11Z gronemeier $
[4843]	28	! reading of namelist file and actions in case of namelist errors revised so that statement labels
	29	! and goto statements are not required any more,
	30	! local namelist parameter added to switch off the module although the respective module namelist
	31	! appears in the namelist file
	32	!
	33	! 4828 2021-01-05 11:21:41Z Giersch
[4537]	34	! reset n_turbines_max to 1E4 (10 000), because it was set to 1 000 in r4497 by mistake
	35	!
	36	! 4535 2020-05-15 12:07:23Z raasch
[4535]	37	! bugfix for restart data format query
	38	!
	39	! 4528 2020-05-11 14:14:09Z oliver.maas
[4528]	40	! added namelist parameter smearing_kernel_size
	41	!
	42	! 4497 2020-04-15 10:20:51Z raasch
[4497]	43	! file re-formatted to follow the PALM coding standard
	44	!
	45	!
	46	! 4495 2020-04-13 20:11:20Z raasch
[4495]	47	! restart data handling with MPI-IO added
	48	!
	49	! 4481 2020-03-31 18:55:54Z maronga
[4467]	50	! ASCII output cleanup
[4497]	51	!
[4467]	52	! 4465 2020-03-20 11:35:48Z maronga
[4497]	53	! Removed old ASCII outputm, some syntax layout adjustments, added output for rotor and tower
	54	! diameters. Added warning message in case of NetCDF 3 (no WTM output file will be produced).
	55	!
[4465]	56	! 4460 2020-03-12 16:47:30Z oliver.maas
[4460]	57	! allow for simulating up to 10 000 wind turbines
[4497]	58	!
[4460]	59	! 4459 2020-03-12 09:35:23Z oliver.maas
[4459]	60	! avoid division by zero in tip loss correction factor calculation
[4497]	61	!
[4459]	62	! 4457 2020-03-11 14:20:43Z raasch
[4457]	63	! use statement for exchange horiz added
[4497]	64	!
[4457]	65	! 4447 2020-03-06 11:05:30Z oliver.maas
[4447]	66	! renamed wind_turbine_parameters namelist variables
[4497]	67	!
[4447]	68	! 4438 2020-03-03 20:49:28Z suehring
[4438]	69	! Bugfix: shifted netcdf preprocessor directive to correct position
[4497]	70	!
[4438]	71	! 4436 2020-03-03 12:47:02Z oliver.maas
[4434]	72	! added optional netcdf data input for wtm array input parameters
[4497]	73	!
[4434]	74	! 4426 2020-02-27 10:02:19Z oliver.maas
[4497]	75	! define time as unlimited dimension so that no maximum number of time steps has to be given for
	76	! wtm_data_output
	77	!
[4426]	78	! 4423 2020-02-25 07:17:11Z maronga
[4423]	79	! Switched to serial output as data is aggerated before anyway.
[4497]	80	!
[4423]	81	! 4420 2020-02-24 14:13:56Z maronga
[4420]	82	! Added output control for wind turbine model
[4497]	83	!
[4420]	84	! 4412 2020-02-19 14:53:13Z maronga
[4412]	85	! Bugfix: corrected character length in dimension_names
[4497]	86	!
[4412]	87	! 4411 2020-02-18 14:28:02Z maronga
[4411]	88	! Added output in NetCDF format using DOM (only netcdf4-parallel is supported).
	89	! Old ASCII output is still available at the moment.
[4497]	90	!
[4411]	91	! 4360 2020-01-07 11:25:50Z suehring
[4497]	92	! Introduction of wall_flags_total_0, which currently sets bits based on static topography
	93	! information used in wall_flags_static_0
	94	!
[4346]	95	! 4343 2019-12-17 12:26:12Z oliver.maas
[4497]	96	! replaced <= by < in line 1464 to ensure that ialpha will not be greater than dlen
	97	!
[4343]	98	! 4329 2019-12-10 15:46:36Z motisi
[4329]	99	! Renamed wall_flags_0 to wall_flags_static_0
[4497]	100	!
[4329]	101	! 4326 2019-12-06 14:16:14Z oliver.maas
[4497]	102	! changed format of turbine control output to allow for higher torque and power values
	103	!
[4326]	104	! 4182 2019-08-22 15:20:23Z scharf
[4182]	105	! Corrected "Former revisions" section
[4497]	106	!
[4182]	107	! 4144 2019-08-06 09:11:47Z raasch
[4144]	108	! relational operators .EQ., .NE., etc. replaced by ==, /=, etc.
[4497]	109	!
[4144]	110	! 4056 2019-06-27 13:53:16Z Giersch
[4497]	111	! CASE DEFAULT action in wtm_actions needs to be CONTINUE. Otherwise an abort will happen for
	112	! location values that are not implemented as CASE statements but are already realized in the code
	113	! (e.g. pt-tendency)
	114	!
[4056]	115	! 3885 2019-04-11 11:29:34Z kanani
[4497]	116	! Changes related to global restructuring of location messages and introduction of additional debug
	117	! messages
	118	!
[3885]	119	! 3875 2019-04-08 17:35:12Z knoop
[3875]	120	! Addaped wtm_tendency to fit the module actions interface
[4497]	121	!
[3875]	122	! 3832 2019-03-28 13:16:58Z raasch
[3832]	123	! instrumented with openmp directives
[4497]	124	!
[3832]	125	! 3725 2019-02-07 10:11:02Z raasch
[3725]	126	! unused variables removed
[4497]	127	!
[3725]	128	! 3685 2019-01-21 01:02:11Z knoop
[3685]	129	! Some interface calls moved to module_interface + cleanup
[4497]	130	!
[3685]	131	! 3655 2019-01-07 16:51:22Z knoop
[3593]	132	! Replace degree symbol by 'degrees'
[4497]	133	!
[4182]	134	! 1914 2016-05-26 14:44:07Z witha
	135	! Initial revision
[3593]	136	!
[4497]	137	!
[1819]	138	! Description:
	139	! ------------
[4497]	140	!> This module calculates the effect of wind turbines on the flow fields. The initial version
	141	!> contains only the advanced actuator disk with rotation method (ADM-R).
[1819]	142	!> The wind turbines include the tower effect, can be yawed and tilted.
[4497]	143	!> The wind turbine model includes controllers for rotational speed, pitch and yaw.
	144	!> Currently some specifications of the NREL 5 MW reference turbine are hardcoded whereas most input
	145	!> data comes from separate files (currently external, planned to be included as namelist which will
	146	!> be read in automatically).
[1819]	147	!>
[3065]	148	!> @todo Replace dz(1) appropriatly to account for grid stretching
[1819]	149	!> @todo Revise code according to PALM Coding Standard
	150	!> @todo Implement ADM and ALM turbine models
	151	!> @todo Generate header information
[1917]	152	!> @todo Implement further parameter checks and error messages
[1819]	153	!> @todo Revise and add code documentation
	154	!> @todo Output turbine parameters as timeseries
	155	!> @todo Include additional output variables
[1864]	156	!> @todo Revise smearing the forces for turbines in yaw
	157	!> @todo Revise nacelle and tower parameterization
	158	!> @todo Allow different turbine types in one simulation
[1819]	159	!
[4497]	160	!--------------------------------------------------------------------------------------------------!
[1819]	161	MODULE wind_turbine_model_mod
	162
[4497]	163	USE arrays_3d, &
[2553]	164	ONLY: tend, u, v, w, zu, zw
[1819]	165
[4497]	166	USE basic_constants_and_equations_mod, &
[2553]	167	ONLY: pi
[1819]	168
[4497]	169	USE control_parameters, &
	170	ONLY: coupling_char, &
	171	debug_output, &
	172	dt_3d, dz, end_time, initializing_actions, message_string, &
	173	origin_date_time, restart_data_format_output, time_since_reference_point, &
	174	wind_turbine
[1819]	175
[4497]	176	USE cpulog, &
[1819]	177	ONLY: cpu_log, log_point_s
	178
[4411]	179	USE data_output_module
[4497]	180
	181	USE grid_variables, &
[1819]	182	ONLY: ddx, dx, ddy, dy
	183
[4497]	184	USE indices, &
	185	ONLY: nbgp, nx, nxl, nxlg, nxr, nxrg, ny, nyn, nyng, nys, nysg, nz, &
[4346]	186	nzb, nzt, wall_flags_total_0
[1819]	187
	188	USE kinds
	189
[4497]	190	USE netcdf_data_input_mod, &
	191	ONLY: check_existence, &
	192	close_input_file, &
	193	get_variable, &
	194	input_pids_wtm, &
	195	inquire_num_variables, &
	196	inquire_variable_names, &
	197	input_file_wtm, &
	198	num_var_pids, &
	199	open_read_file, &
	200	pids_id, &
[4434]	201	vars_pids
[4497]	202
[1819]	203	USE pegrid
	204
[4495]	205	USE restart_data_mpi_io_mod, &
	206	ONLY: rrd_mpi_io_global_array, wrd_mpi_io_global_array
[1819]	207
[4497]	208
[1819]	209	IMPLICIT NONE
	210
[1864]	211	PRIVATE
[1819]	212
[4497]	213	CHARACTER(LEN=100) :: variable_name !< name of output variable
	214	CHARACTER(LEN=30) :: nc_filename !<
[4460]	215
[4497]	216
[4537]	217	INTEGER(iwp), PARAMETER :: n_turbines_max = 1E4 !< maximum number of turbines (for array allocation)
[4497]	218
	219
[1819]	220	!
	221	!-- Variables specified in the namelist wind_turbine_par
[4497]	222	INTEGER(iwp) :: n_airfoils = 8 !< number of airfoils of the used turbine model (for ADM-R and ALM)
	223	INTEGER(iwp) :: n_turbines = 1 !< number of turbines
[1819]	224
[4497]	225	LOGICAL :: pitch_control = .FALSE. !< switch for use of pitch controller
	226	LOGICAL :: speed_control = .FALSE. !< switch for use of speed controller
	227	LOGICAL :: tip_loss_correction = .FALSE. !< switch for use of tip loss correct.
	228	LOGICAL :: yaw_control = .FALSE. !< switch for use of yaw controller
	229
	230
	231	LOGICAL :: initial_write_coordinates = .FALSE. !<
	232
	233
	234	REAL(wp), DIMENSION(:), POINTER :: output_values_1d_pointer !< pointer for 2d output array
	235	REAL(wp), POINTER :: output_values_0d_pointer !< pointer for 2d output array
	236	REAL(wp), DIMENSION(:), ALLOCATABLE, TARGET :: output_values_1d_target !< pointer for 2d output array
	237	REAL(wp), TARGET :: output_values_0d_target !< pointer for 2d output array
	238
	239
	240	REAL(wp) :: dt_data_output_wtm = 0.0_wp !< data output interval
	241	REAL(wp) :: time_wtm = 0.0_wp !< time since last data output
	242
	243
[4447]	244	REAL(wp) :: segment_length_tangential = 1.0_wp !< length of the segments, the rotor area is divided into
	245	!< (in tangential direction, as factor of MIN(dx,dy,dz))
	246	REAL(wp) :: segment_width_radial = 0.5_wp !< width of the segments, the rotor area is divided into
	247	!< (in radial direction, as factor of MIN(dx,dy,dz))
[4528]	248
	249	REAL(wp) :: smearing_kernel_size = 2.0_wp !< size of the smearing kernel as multiples of dx
	250
[4447]	251	REAL(wp) :: time_turbine_on = 0.0_wp !< time at which turbines are started
[4497]	252	REAL(wp) :: tilt_angle = 0.0_wp !< vertical tilt_angle of the rotor [degree] ( positive = backwards )
[1819]	253
[4497]	254	!< ( clockwise, 0 = facing west )
[4460]	255	REAL(wp), DIMENSION(1:n_turbines_max) :: hub_x = 9999999.9_wp !< position of hub in x-direction
	256	REAL(wp), DIMENSION(1:n_turbines_max) :: hub_y = 9999999.9_wp !< position of hub in y-direction
	257	REAL(wp), DIMENSION(1:n_turbines_max) :: hub_z = 9999999.9_wp !< position of hub in z-direction
	258	REAL(wp), DIMENSION(1:n_turbines_max) :: nacelle_radius = 0.0_wp !< nacelle diameter [m]
	259	! REAL(wp), DIMENSION(1:n_turbines_max) :: nacelle_cd = 0.85_wp !< drag coefficient for nacelle
	260	REAL(wp), DIMENSION(1:n_turbines_max) :: tower_cd = 1.2_wp !< drag coefficient for tower
[4497]	261	REAL(wp), DIMENSION(1:n_turbines_max) :: pitch_angle = 0.0_wp !< constant pitch angle
	262	REAL(wp), DIMENSION(1:n_turbines_max) :: rotor_radius = 63.0_wp !< rotor radius [m]
	263	REAL(wp), DIMENSION(1:n_turbines_max), TARGET :: rotor_speed = 0.9_wp !< inital or constant rotor speed [rad/s]
	264	REAL(wp), DIMENSION(1:n_turbines_max) :: tower_diameter = 0.0_wp !< tower diameter [m]
	265	REAL(wp), DIMENSION(1:n_turbines_max) :: yaw_angle = 0.0_wp !< yaw angle [degree]
[1839]	266
[4497]	267
[1819]	268	!
	269	!-- Variables specified in the namelist for speed controller
	270	!-- Default values are from the NREL 5MW research turbine (Jonkman, 2008)
[4497]	271	REAL(wp) :: air_density = 1.225_wp !< Air density to convert to W [kg/m3]
	272	REAL(wp) :: gear_efficiency = 1.0_wp !< Loss between rotor and generator
	273	REAL(wp) :: gear_ratio = 97.0_wp !< Gear ratio from rotor to generator
	274	REAL(wp) :: generator_power_rated = 5296610.0_wp !< rated turbine power [W]
	275	REAL(wp) :: generator_inertia = 534.116_wp !< Inertia of the generator [kg*m2]
	276	REAL(wp) :: generator_efficiency = 0.944_wp !< Electric efficiency of the generator
	277	REAL(wp) :: generator_speed_rated = 121.6805_wp !< Rated generator speed [rad/s]
	278	REAL(wp) :: generator_torque_max = 47402.91_wp !< Maximum of the generator torque [Nm]
	279	REAL(wp) :: generator_torque_rate_max = 15000.0_wp !< Max generator torque increase [Nm/s]
	280	REAL(wp) :: pitch_rate = 8.0_wp !< Max pitch rate [degree/s]
	281	REAL(wp) :: region_2_slope = 2.332287_wp !< Slope constant for region 2
	282	REAL(wp) :: region_2_min = 91.21091_wp !< Lower generator speed boundary of region 2 [rad/s]
	283	REAL(wp) :: region_15_min = 70.16224_wp !< Lower generator speed boundary of region 1.5 [rad/s]
	284	REAL(wp) :: rotor_inertia = 34784179.0_wp !< Inertia of the rotor [kg*m2]
[1819]	285
[1839]	286
[1912]	287
[1819]	288	!
[4497]	289	!-- Variables specified in the namelist for yaw control:
	290	REAL(wp) :: yaw_misalignment_max = 0.08726_wp !< maximum tolerated yaw missalignment [rad]
	291	REAL(wp) :: yaw_misalignment_min = 0.008726_wp !< minimum yaw missalignment for which the actuator stops [rad]
	292	REAL(wp) :: yaw_speed = 0.005236_wp !< speed of the yaw actuator [rad/s]
[1819]	293
	294	!
[4497]	295	!-- Variables for initialization of the turbine model:
	296	INTEGER(iwp) :: inot !< turbine loop index (turbine id)
	297	INTEGER(iwp) :: nsegs_max !< maximum number of segments (all turbines, required for allocation of arrays)
	298	INTEGER(iwp) :: nrings_max !< maximum number of rings (all turbines, required for allocation of arrays)
	299	INTEGER(iwp) :: ring !< ring loop index (ring number)
	300	INTEGER(iwp) :: upper_end !<
[1819]	301
[4497]	302	INTEGER(iwp), DIMENSION(1) :: lct !<
[1819]	303
[4497]	304	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: i_hub !< index belonging to x-position of the turbine
	305	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: i_smear !< index defining the area for the smearing of the forces (x-direction)
	306	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: j_hub !< index belonging to y-position of the turbine
	307	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: j_smear !< index defining the area for the smearing of the forces (y-direction)
	308	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: k_hub !< index belonging to hub height
	309	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: k_smear !< index defining the area for the smearing of the forces (z-direction)
	310	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nrings !< number of rings per turbine
	311	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nsegs_total !< total number of segments per turbine
[1819]	312
[4497]	313	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: nsegs !< number of segments per ring and turbine
[1819]	314
[1912]	315	!
[4497]	316	!- Parameters for the smearing from the rotor to the cartesian grid:
	317	REAL(wp) :: delta_t_factor !<
	318	REAL(wp) :: eps_factor !<
	319	REAL(wp) :: eps_min !<
	320	REAL(wp) :: eps_min2 !<
	321	REAL(wp) :: pol_a !< parameter for the polynomial smearing fct
	322	REAL(wp) :: pol_b !< parameter for the polynomial smearing fct
[1839]	323	!
[4497]	324	!-- Variables for the calculation of lift and drag coefficients:
	325	REAL(wp), DIMENSION(:), ALLOCATABLE :: ard !<
	326	REAL(wp), DIMENSION(:), ALLOCATABLE :: crd !<
	327	REAL(wp), DIMENSION(:), ALLOCATABLE :: delta_r !< radial segment length
	328	REAL(wp), DIMENSION(:), ALLOCATABLE :: lrd !<
[1819]	329
[4497]	330	REAL(wp) :: accu_cl_cd_tab = 0.1_wp !< Accuracy of the interpolation of the lift and drag coeff [deg]
[1819]	331
[4497]	332	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: turb_cd_tab !< table of the blade drag coefficient
	333	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: turb_cl_tab !< table of the blade lift coefficient
	334
	335	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: nac_cd_surf !< 3d field of the tower drag coefficient
[1912]	336	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: tow_cd_surf !< 3d field of the nacelle drag coefficient
[1819]	337
	338	!
[4497]	339	!-- Variables for the calculation of the forces:
	340	REAL(wp) :: cur_r !<
	341	REAL(wp) :: phi_rotor !<
	342	REAL(wp) :: pre_factor !<
	343	REAL(wp) :: torque_seg !<
	344	REAL(wp) :: u_int_l !<
	345	REAL(wp) :: u_int_u !<
	346	REAL(wp) :: u_rot !<
	347	REAL(wp) :: v_int_l !<
	348	REAL(wp) :: v_int_u !<
	349	REAL(wp) :: w_int_l !<
	350	REAL(wp) :: w_int_u !<
[3832]	351	!$OMP THREADPRIVATE (cur_r, phi_rotor, pre_factor, torque_seg, u_int_l, u_int_u, u_rot, &
	352	!$OMP& v_int_l, v_int_u, w_int_l, w_int_u)
[1912]	353	!
[4497]	354	!- Tendencies from the nacelle and tower thrust:
	355	REAL(wp) :: tend_nac_x = 0.0_wp !<
	356	REAL(wp) :: tend_nac_y = 0.0_wp !<
	357	REAL(wp) :: tend_tow_x = 0.0_wp !<
[1912]	358	REAL(wp) :: tend_tow_y = 0.0_wp !<
[3832]	359	!$OMP THREADPRIVATE (tend_nac_x, tend_tow_x, tend_nac_y, tend_tow_y)
[1819]	360
[4497]	361	REAL(wp), DIMENSION(:), ALLOCATABLE :: alpha_attack !<
	362	REAL(wp), DIMENSION(:), ALLOCATABLE :: chord !<
	363	REAL(wp), DIMENSION(:), ALLOCATABLE :: phi_rel !<
	364	REAL(wp), DIMENSION(:), ALLOCATABLE :: torque_total !<
	365	REAL(wp), DIMENSION(:), ALLOCATABLE :: thrust_rotor !<
	366	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cd !<
	367	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cl !<
	368	REAL(wp), DIMENSION(:), ALLOCATABLE :: vrel !<
	369	REAL(wp), DIMENSION(:), ALLOCATABLE :: vtheta !<
[1912]	370
	371	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: rbx, rby, rbz !< coordinates of the blade elements
	372	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: rotx, roty, rotz !< normal vectors to the rotor coordinates
	373
	374	!
[4497]	375	!- Fields for the interpolation of velocities on the rotor grid:
	376	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: u_int !<
	377	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: u_int_1_l !<
	378	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: v_int !<
	379	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: v_int_1_l !<
	380	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: w_int !<
	381	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: w_int_1_l !<
	382
[1912]	383	!
[4497]	384	!- Rotor tendencies on the segments:
	385	REAL(wp), DIMENSION(:), ALLOCATABLE :: thrust_seg !<
	386	REAL(wp), DIMENSION(:), ALLOCATABLE :: torque_seg_y !<
	387	REAL(wp), DIMENSION(:), ALLOCATABLE :: torque_seg_z !<
[1912]	388
	389	!
[4497]	390	!- Rotor tendencies on the rings:
	391	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: thrust_ring !<
	392	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: torque_ring_y !<
	393	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: torque_ring_z !<
	394
[1912]	395	!
[4497]	396	!- Rotor tendencies on rotor grids for all turbines:
	397	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: thrust !<
	398	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: torque_y !<
	399	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: torque_z !<
[1912]	400
	401	!
[4497]	402	!- Rotor tendencies on coordinate grid:
	403	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: rot_tend_x !<
	404	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: rot_tend_y !<
	405	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: rot_tend_z !<
	406
	407	!
	408	!- Variables for the rotation of the rotor coordinates:
[4460]	409	REAL(wp), DIMENSION(1:n_turbines_max,1:3,1:3) :: rot_coord_trans !< matrix for rotation of rotor coordinates
[1819]	410
[4497]	411	REAL(wp), DIMENSION(1:3) :: rot_eigen_rad !<
	412	REAL(wp), DIMENSION(1:3) :: rot_eigen_azi !<
	413	REAL(wp), DIMENSION(1:3) :: rot_eigen_nor !<
	414	REAL(wp), DIMENSION(1:3) :: re !<
	415	REAL(wp), DIMENSION(1:3) :: rea !<
	416	REAL(wp), DIMENSION(1:3) :: ren !<
	417	REAL(wp), DIMENSION(1:3) :: rote !<
	418	REAL(wp), DIMENSION(1:3) :: rota !<
	419	REAL(wp), DIMENSION(1:3) :: rotn !<
	420
[1839]	421	!
[4497]	422	!-- Fixed variables for the speed controller:
	423	LOGICAL :: start_up = .TRUE. !<
[1819]	424
[4497]	425	REAL(wp) :: fcorner !< corner freq for the controller low pass filter
	426	REAL(wp) :: om_rate !< rotor speed change
	427	REAL(wp) :: region_25_min !< min region 2.5
	428	REAL(wp) :: region_25_slope !< slope in region 2.5
	429	REAL(wp) :: slope15 !< slope in region 1.5
	430	REAL(wp) :: trq_rate !< torque change
	431	REAL(wp) :: vs_sysp !<
	432	REAL(wp) :: lp_coeff !< coeff for the controller low pass filter
[1819]	433
[4497]	434	REAL(wp), DIMENSION(n_turbines_max) :: rotor_speed_l = 0.0_wp !< local rot speed [rad/s]
[2563]	435
[1839]	436	!
[4497]	437	!-- Fixed variables for the yaw controller:
	438	INTEGER(iwp) :: wdlon !<
	439	INTEGER(iwp) :: wdsho !<
[1819]	440
[4497]	441	LOGICAL, DIMENSION(1:n_turbines_max) :: doyaw = .FALSE. !<
	442
	443	REAL(wp), DIMENSION(:) , ALLOCATABLE :: u_inflow !< wind speed at hub
	444	REAL(wp), DIMENSION(:) , ALLOCATABLE :: u_inflow_l !<
	445	REAL(wp), DIMENSION(:) , ALLOCATABLE :: wdir !< wind direction at hub
	446	REAL(wp), DIMENSION(:) , ALLOCATABLE :: wdir_l !<
	447	REAL(wp), DIMENSION(:) , ALLOCATABLE :: wd2_l !< local (cpu) short running avg of the wd
	448	REAL(wp), DIMENSION(:) , ALLOCATABLE :: wd30_l !< local (cpu) long running avg of the wd
[1912]	449	REAL(wp), DIMENSION(:) , ALLOCATABLE :: yawdir !< direction to yaw
[4447]	450	REAL(wp), DIMENSION(:) , ALLOCATABLE :: yaw_angle_l !< local (cpu) yaw angle
[4497]	451
	452	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: wd2 !<
[1912]	453	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: wd30 !<
[1819]	454
[4497]	455
[2563]	456	!
[4497]	457	!-- Variables that have to be saved in the binary file for restarts:
	458	REAL(wp), DIMENSION(1:n_turbines_max) :: pitch_angle_old = 0.0_wp !< old constant pitch angle
[4460]	459	REAL(wp), DIMENSION(1:n_turbines_max) :: generator_speed = 0.0_wp !< curr. generator speed
	460	REAL(wp), DIMENSION(1:n_turbines_max) :: generator_speed_f = 0.0_wp !< filtered generator speed
	461	REAL(wp), DIMENSION(1:n_turbines_max) :: generator_speed_old = 0.0_wp !< last generator speed
	462	REAL(wp), DIMENSION(1:n_turbines_max) :: generator_speed_f_old = 0.0_wp !< last filtered generator speed
	463	REAL(wp), DIMENSION(1:n_turbines_max) :: torque_gen = 0.0_wp !< generator torque
	464	REAL(wp), DIMENSION(1:n_turbines_max) :: torque_gen_old = 0.0_wp !< last generator torque
[1819]	465
[2563]	466
[1839]	467	SAVE
[1819]	468
[1839]	469
	470	INTERFACE wtm_parin
	471	MODULE PROCEDURE wtm_parin
	472	END INTERFACE wtm_parin
[2563]	473
[1912]	474	INTERFACE wtm_check_parameters
	475	MODULE PROCEDURE wtm_check_parameters
	476	END INTERFACE wtm_check_parameters
[3875]	477
[4411]	478	INTERFACE wtm_data_output
	479	MODULE PROCEDURE wtm_data_output
	480	END INTERFACE wtm_data_output
[4497]	481
[1839]	482	INTERFACE wtm_init_arrays
	483	MODULE PROCEDURE wtm_init_arrays
	484	END INTERFACE wtm_init_arrays
	485
	486	INTERFACE wtm_init
	487	MODULE PROCEDURE wtm_init
	488	END INTERFACE wtm_init
[2553]	489
[4411]	490	INTERFACE wtm_init_output
	491	MODULE PROCEDURE wtm_init_output
	492	END INTERFACE wtm_init_output
[4497]	493
[3875]	494	INTERFACE wtm_actions
	495	MODULE PROCEDURE wtm_actions
	496	MODULE PROCEDURE wtm_actions_ij
	497	END INTERFACE wtm_actions
[1819]	498
[3875]	499	INTERFACE wtm_rrd_global
[4495]	500	MODULE PROCEDURE wtm_rrd_global_ftn
	501	MODULE PROCEDURE wtm_rrd_global_mpi
[3875]	502	END INTERFACE wtm_rrd_global
[1819]	503
[3875]	504	INTERFACE wtm_wrd_global
	505	MODULE PROCEDURE wtm_wrd_global
	506	END INTERFACE wtm_wrd_global
[2563]	507
[3875]	508
[4497]	509	PUBLIC &
	510	dt_data_output_wtm, &
	511	time_wtm, &
[4420]	512	wind_turbine
	513
[4497]	514	PUBLIC &
	515	wtm_parin, &
	516	wtm_check_parameters, &
	517	wtm_data_output, &
	518	wtm_init_arrays, &
	519	wtm_init_output, &
	520	wtm_init, &
	521	wtm_actions, &
	522	wtm_rrd_global, &
[3875]	523	wtm_wrd_global
	524
	525
[1819]	526	CONTAINS
	527
	528
[4497]	529	!--------------------------------------------------------------------------------------------------!
[1819]	530	! Description:
	531	! ------------
[1839]	532	!> Parin for &wind_turbine_par for wind turbine model
[4497]	533	!--------------------------------------------------------------------------------------------------!
	534	SUBROUTINE wtm_parin
[1819]	535
[4497]	536	IMPLICIT NONE
[1819]	537
[4843]	538	CHARACTER(LEN=100) :: line !< dummy string that contains the current line of the parameter file
[1839]	539
[4843]	540	INTEGER(iwp) :: io_status !< status after reading the namelist file
[4447]	541
[4843]	542	LOGICAL :: switch_off_module = .FALSE. !< local namelist parameter to switch off the module
	543	!< although the respective module namelist appears in
	544	!< the namelist file
	545
	546	NAMELIST /wind_turbine_parameters/ air_density, &
	547	dt_data_output_wtm, &
	548	gear_efficiency, &
	549	gear_ratio, &
	550	generator_efficiency, &
	551	generator_inertia, &
	552	generator_power_rated, &
	553	generator_speed_rated, &
	554	generator_torque_max, &
	555	generator_torque_rate_max, &
	556	hub_x, &
	557	hub_y, &
	558	hub_z, &
	559	nacelle_radius, &
	560	n_airfoils, &
	561	n_turbines, &
	562	pitch_angle, &
	563	pitch_control, &
	564	pitch_rate, &
	565	region_15_min, &
	566	region_2_min, &
	567	region_2_slope, &
	568	rotor_inertia, &
	569	rotor_radius, &
	570	rotor_speed, &
	571	segment_length_tangential, &
	572	segment_width_radial, &
	573	smearing_kernel_size, &
	574	speed_control, &
	575	switch_off_module, &
	576	tilt_angle, &
	577	time_turbine_on, &
	578	tip_loss_correction, &
	579	tower_cd, &
	580	tower_diameter, &
	581	yaw_angle, &
	582	yaw_control, &
	583	yaw_misalignment_max, &
	584	yaw_misalignment_min, &
	585	yaw_speed
	586
[1819]	587	!
[4843]	588	!-- Move to the beginning of the namelist file and try to find and read the namelist.
	589	REWIND( 11 )
	590	READ( 11, wind_turbine_parameters, IOSTAT=io_status )
[1839]	591
	592	!
[4843]	593	!-- Action depending on the READ status
	594	IF ( io_status == 0 ) THEN
[2932]	595	!
[4843]	596	!-- wind_turbine_parameters namelist was found and read correctly. Enable the
	597	!-- wind turbine module.
	598	IF ( .NOT. switch_off_module ) wind_turbine = .TRUE.
[4465]	599
[4843]	600	ELSEIF ( io_status > 0 ) THEN
	601	!
	602	!-- wind_turbine_parameters namelist was found but contained errors. Print an error message
	603	!-- including the line that caused the problem.
	604	BACKSPACE( 11 )
	605	READ( 11 , '(A)' ) line
	606	CALL parin_fail_message( 'wind_turbine_parameters', line )
[2932]	607
[4843]	608	ENDIF
[3246]	609
[4497]	610	END SUBROUTINE wtm_parin
[1839]	611
[2563]	612
[4497]	613	!--------------------------------------------------------------------------------------------------!
[2563]	614	! Description:
	615	! ------------
[2894]	616	!> This routine writes the respective restart data.
[4497]	617	!--------------------------------------------------------------------------------------------------!
	618	SUBROUTINE wtm_wrd_global
[2576]	619
	620
[4497]	621	IMPLICIT NONE
[2776]	622
[2894]	623
[4497]	624	IF ( TRIM( restart_data_format_output ) == 'fortran_binary' ) THEN
[2894]	625
[4497]	626	CALL wrd_write_string( 'generator_speed' )
	627	WRITE ( 14 ) generator_speed
[2894]	628
[4497]	629	CALL wrd_write_string( 'generator_speed_f' )
	630	WRITE ( 14 ) generator_speed_f
[2894]	631
[4497]	632	CALL wrd_write_string( 'generator_speed_f_old' )
	633	WRITE ( 14 ) generator_speed_f_old
[2894]	634
[4497]	635	CALL wrd_write_string( 'generator_speed_old' )
	636	WRITE ( 14 ) generator_speed_old
[2894]	637
[4497]	638	CALL wrd_write_string( 'rotor_speed' )
	639	WRITE ( 14 ) rotor_speed
[2894]	640
[4497]	641	CALL wrd_write_string( 'yaw_angle' )
	642	WRITE ( 14 ) yaw_angle
[2894]	643
[4497]	644	CALL wrd_write_string( 'pitch_angle' )
	645	WRITE ( 14 ) pitch_angle
[2894]	646
[4497]	647	CALL wrd_write_string( 'pitch_angle_old' )
	648	WRITE ( 14 ) pitch_angle_old
[2894]	649
[4497]	650	CALL wrd_write_string( 'torque_gen' )
	651	WRITE ( 14 ) torque_gen
[4495]	652
[4497]	653	CALL wrd_write_string( 'torque_gen_old' )
	654	WRITE ( 14 ) torque_gen_old
[4495]	655
[4535]	656	ELSEIF ( restart_data_format_output(1:3) == 'mpi' ) THEN
[4495]	657
[4497]	658	CALL wrd_mpi_io_global_array( 'generator_speed', generator_speed )
	659	CALL wrd_mpi_io_global_array( 'generator_speed_f', generator_speed_f )
	660	CALL wrd_mpi_io_global_array( 'generator_speed_f_old', generator_speed_f_old )
	661	CALL wrd_mpi_io_global_array( 'generator_speed_old', generator_speed_old )
	662	CALL wrd_mpi_io_global_array( 'rotor_speed', rotor_speed )
	663	CALL wrd_mpi_io_global_array( 'yaw_angle', yaw_angle )
	664	CALL wrd_mpi_io_global_array( 'pitch_angle', pitch_angle )
	665	CALL wrd_mpi_io_global_array( 'pitch_angle_old', pitch_angle_old )
	666	CALL wrd_mpi_io_global_array( 'torque_gen', torque_gen )
	667	CALL wrd_mpi_io_global_array( 'torque_gen_old', torque_gen_old )
[2563]	668
[4497]	669	ENDIF
[2563]	670
[4497]	671	END SUBROUTINE wtm_wrd_global
	672
	673
	674	!--------------------------------------------------------------------------------------------------!
[2563]	675	! Description:
	676	! ------------
[4495]	677	!> Read module-specific global restart data (Fortran binary format).
[4497]	678	!--------------------------------------------------------------------------------------------------!
[4495]	679	SUBROUTINE wtm_rrd_global_ftn( found )
[2563]	680
	681
[4497]	682	USE control_parameters, &
[2894]	683	ONLY: length, restart_string
	684
	685
[2563]	686	IMPLICIT NONE
	687
[4497]	688	LOGICAL, INTENT(OUT) :: found
[2563]	689
	690
[2894]	691	found = .TRUE.
[2563]	692
	693
[2894]	694	SELECT CASE ( restart_string(1:length) )
[2563]	695
[4447]	696	CASE ( 'generator_speed' )
	697	READ ( 13 ) generator_speed
	698	CASE ( 'generator_speed_f' )
	699	READ ( 13 ) generator_speed_f
	700	CASE ( 'generator_speed_f_old' )
	701	READ ( 13 ) generator_speed_f_old
	702	CASE ( 'generator_speed_old' )
	703	READ ( 13 ) generator_speed_old
	704	CASE ( 'rotor_speed' )
	705	READ ( 13 ) rotor_speed
	706	CASE ( 'yaw_angle' )
	707	READ ( 13 ) yaw_angle
	708	CASE ( 'pitch_angle' )
	709	READ ( 13 ) pitch_angle
	710	CASE ( 'pitch_angle_old' )
	711	READ ( 13 ) pitch_angle_old
[2894]	712	CASE ( 'torque_gen' )
	713	READ ( 13 ) torque_gen
	714	CASE ( 'torque_gen_old' )
	715	READ ( 13 ) torque_gen_old
[2563]	716
[2894]	717	CASE DEFAULT
[2563]	718
[2894]	719	found = .FALSE.
[2563]	720
[2894]	721	END SELECT
[2563]	722
[4497]	723
[4495]	724	END SUBROUTINE wtm_rrd_global_ftn
[2894]	725
	726
[2563]	727	!------------------------------------------------------------------------------!
	728	! Description:
	729	! ------------
[4495]	730	!> Read module-specific global restart data (MPI-IO).
	731	!------------------------------------------------------------------------------!
	732	SUBROUTINE wtm_rrd_global_mpi
	733
	734	CALL rrd_mpi_io_global_array( 'generator_speed', generator_speed )
	735	CALL rrd_mpi_io_global_array( 'generator_speed_f', generator_speed_f )
	736	CALL rrd_mpi_io_global_array( 'generator_speed_f_old', generator_speed_f_old )
	737	CALL rrd_mpi_io_global_array( 'generator_speed_old', generator_speed_old )
	738	CALL rrd_mpi_io_global_array( 'rotor_speed', rotor_speed )
	739	CALL rrd_mpi_io_global_array( 'yaw_angle', yaw_angle )
	740	CALL rrd_mpi_io_global_array( 'pitch_angle', pitch_angle )
	741	CALL rrd_mpi_io_global_array( 'pitch_angle_old', pitch_angle_old )
	742	CALL rrd_mpi_io_global_array( 'torque_gen', torque_gen )
	743	CALL rrd_mpi_io_global_array( 'torque_gen_old', torque_gen_old )
	744
	745	END SUBROUTINE wtm_rrd_global_mpi
	746
	747
[4497]	748	!--------------------------------------------------------------------------------------------------!
[4495]	749	! Description:
	750	! ------------
[2563]	751	!> Check namelist parameter
[4497]	752	!--------------------------------------------------------------------------------------------------!
	753	SUBROUTINE wtm_check_parameters
[1912]	754
[4497]	755	IMPLICIT NONE
[4436]	756
[4497]	757	IF ( .NOT. input_pids_wtm ) THEN
	758	IF ( ( .NOT.speed_control ) .AND. pitch_control ) THEN
	759	message_string = 'pitch_control = .TRUE. requires speed_control = .TRUE.'
	760	CALL message( 'wtm_check_parameters', 'PA0461', 1, 2, 0, 6, 0 )
	761	ENDIF
[4436]	762
[4497]	763	IF ( ANY( rotor_speed(1:n_turbines) < 0.0 ) ) THEN
	764	message_string = 'rotor_speed < 0.0, Please set rotor_speed to ' // &
	765	'a value equal or larger than zero'
	766	CALL message( 'wtm_check_parameters', 'PA0462', 1, 2, 0, 6, 0 )
	767	ENDIF
[4436]	768
[4497]	769	IF ( ANY( hub_x(1:n_turbines) == 9999999.9_wp ) .OR. &
	770	ANY( hub_y(1:n_turbines) == 9999999.9_wp ) .OR. &
	771	ANY( hub_z(1:n_turbines) == 9999999.9_wp ) ) THEN
[4436]	772
[4497]	773	message_string = 'hub_x, hub_y, hub_z have to be given for each turbine.'
	774	CALL message( 'wtm_check_parameters', 'PA0463', 1, 2, 0, 6, 0 )
[1912]	775	ENDIF
[4497]	776	ENDIF
	777
	778	END SUBROUTINE wtm_check_parameters
	779	!
	780	!--------------------------------------------------------------------------------------------------!
[1839]	781	! Description:
	782	! ------------
	783	!> Allocate wind turbine model arrays
[4497]	784	!--------------------------------------------------------------------------------------------------!
	785	SUBROUTINE wtm_init_arrays
[1839]	786
[4497]	787	IMPLICIT NONE
[1839]	788
[4497]	789	REAL(wp) :: delta_r_factor !<
	790	REAL(wp) :: delta_r_init !<
[1864]	791
[4436]	792	#if defined( __netcdf )
[1839]	793	!
[4497]	794	! Read wtm input file (netcdf) if it exists:
	795	IF ( input_pids_wtm ) THEN
[4434]	796
	797	!
[4497]	798	!-- Open the wtm input file:
	799	CALL open_read_file( TRIM( input_file_wtm ) // &
	800	TRIM( coupling_char ), pids_id )
[4434]	801
[4497]	802	CALL inquire_num_variables( pids_id, num_var_pids )
[4434]	803
	804	!
[4497]	805	!-- Allocate memory to store variable names and read them:
	806	ALLOCATE( vars_pids(1:num_var_pids) )
	807	CALL inquire_variable_names( pids_id, vars_pids )
[4434]	808
	809	!
[4497]	810	!-- Input of all wtm parameters:
	811	IF ( check_existence( vars_pids, 'tower_diameter' ) ) THEN
	812	CALL get_variable( pids_id, 'tower_diameter', tower_diameter(1:n_turbines) )
	813	ENDIF
[4434]	814
[4497]	815	IF ( check_existence( vars_pids, 'rotor_speed' ) ) THEN
	816	CALL get_variable( pids_id, 'rotor_speed', rotor_speed(1:n_turbines) )
	817	ENDIF
[4434]	818
[4497]	819	IF ( check_existence( vars_pids, 'pitch_angle' ) ) THEN
	820	CALL get_variable( pids_id, 'pitch_angle', pitch_angle(1:n_turbines) )
	821	ENDIF
[4434]	822
[4497]	823	IF ( check_existence( vars_pids, 'yaw_angle' ) ) THEN
	824	CALL get_variable( pids_id, 'yaw_angle', yaw_angle(1:n_turbines) )
	825	ENDIF
[4434]	826
[4497]	827	IF ( check_existence( vars_pids, 'hub_x' ) ) THEN
	828	CALL get_variable( pids_id, 'hub_x', hub_x(1:n_turbines) )
	829	ENDIF
[4434]	830
[4497]	831	IF ( check_existence( vars_pids, 'hub_y' ) ) THEN
	832	CALL get_variable( pids_id, 'hub_y', hub_y(1:n_turbines) )
	833	ENDIF
[4434]	834
[4497]	835	IF ( check_existence( vars_pids, 'hub_z' ) ) THEN
	836	CALL get_variable( pids_id, 'hub_z', hub_z(1:n_turbines) )
	837	ENDIF
[4434]	838
[4497]	839	IF ( check_existence( vars_pids, 'nacelle_radius' ) ) THEN
	840	CALL get_variable( pids_id, 'nacelle_radius', nacelle_radius(1:n_turbines) )
	841	ENDIF
[4434]	842
[4497]	843	IF ( check_existence( vars_pids, 'rotor_radius' ) ) THEN
	844	CALL get_variable( pids_id, 'rotor_radius', rotor_radius(1:n_turbines) )
	845	ENDIF
	846	!
	847	! IF ( check_existence( vars_pids, 'nacelle_cd' ) ) THEN
	848	! CALL get_variable( pids_id, 'nacelle_cd', nacelle_cd(1:n_turbines) )
	849	! ENDIF
[4434]	850
[4497]	851	IF ( check_existence( vars_pids, 'tower_cd' ) ) THEN
	852	CALL get_variable( pids_id, 'tower_cd', tower_cd(1:n_turbines) )
	853	ENDIF
[4434]	854	!
[4497]	855	!-- Close wtm input file:
	856	CALL close_input_file( pids_id )
[4434]	857
[4497]	858	ENDIF
[4434]	859	#endif
	860
	861	!
[4497]	862	!-- To be able to allocate arrays with dimension of rotor rings and segments,
	863	!-- the maximum possible numbers of rings and segments have to be calculated:
	864	ALLOCATE( nrings(1:n_turbines) )
	865	ALLOCATE( delta_r(1:n_turbines) )
[1819]	866
[4497]	867	nrings(:) = 0
	868	delta_r(:) = 0.0_wp
[1819]	869
	870	!
[4497]	871	!-- Thickness (radial) of each ring and length (tangential) of each segment:
	872	delta_r_factor = segment_width_radial
	873	delta_t_factor = segment_length_tangential
	874	delta_r_init = delta_r_factor * MIN( dx, dy, dz(1) )
[1819]	875
[4497]	876	DO inot = 1, n_turbines
[1819]	877	!
[4497]	878	!-- Determine number of rings:
	879	nrings(inot) = NINT( rotor_radius(inot) / delta_r_init )
[1819]	880
[4497]	881	delta_r(inot) = rotor_radius(inot) / nrings(inot)
[1819]	882
[4497]	883	ENDDO
[1819]	884
[4497]	885	nrings_max = MAXVAL( nrings )
[1819]	886
[4497]	887	ALLOCATE( nsegs(1:nrings_max,1:n_turbines) )
	888	ALLOCATE( nsegs_total(1:n_turbines) )
[1819]	889
[4497]	890	nsegs(:,:) = 0
	891	nsegs_total(:) = 0
[1819]	892
	893
[4497]	894	DO inot = 1, n_turbines
	895	DO ring = 1, nrings(inot)
[1819]	896	!
[4497]	897	!-- Determine number of segments for each ring:
	898	nsegs(ring,inot) = MAX( 8, CEILING( delta_r_factor * pi * ( 2.0_wp * ring - 1.0_wp ) / &
	899	delta_t_factor ) )
	900	ENDDO
[1819]	901	!
[4497]	902	!-- Total sum of all rotor segments:
	903	nsegs_total(inot) = SUM( nsegs(:,inot) )
	904	ENDDO
[1819]	905
	906	!
[4497]	907	!-- Maximum number of segments per ring:
	908	nsegs_max = MAXVAL( nsegs )
[1819]	909
[1864]	910	!!
[4497]	911	!!-- TODO: Folgendes im Header ausgeben!
	912	! IF ( myid == 0 ) THEN
	913	! PRINT*, 'nrings(1) = ', nrings(1)
	914	! PRINT*, '----------------------------------------------------------------------------------'
	915	! PRINT*, 'nsegs(:,1) = ', nsegs(:,1)
	916	! PRINT*, '----------------------------------------------------------------------------------'
	917	! PRINT*, 'nrings_max = ', nrings_max
	918	! PRINT*, 'nsegs_max = ', nsegs_max
	919	! PRINT*, 'nsegs_total(1) = ', nsegs_total(1)
	920	! ENDIF
[1819]	921
	922
	923	!
[4497]	924	!-- Allocate 1D arrays (dimension = number of turbines):
	925	ALLOCATE( i_hub(1:n_turbines) )
	926	ALLOCATE( i_smear(1:n_turbines) )
	927	ALLOCATE( j_hub(1:n_turbines) )
	928	ALLOCATE( j_smear(1:n_turbines) )
	929	ALLOCATE( k_hub(1:n_turbines) )
	930	ALLOCATE( k_smear(1:n_turbines) )
	931	ALLOCATE( torque_total(1:n_turbines) )
	932	ALLOCATE( thrust_rotor(1:n_turbines) )
[1819]	933
	934	!
[4497]	935	!-- Allocation of the 1D arrays for yaw control:
	936	ALLOCATE( yawdir(1:n_turbines) )
	937	ALLOCATE( u_inflow(1:n_turbines) )
	938	ALLOCATE( wdir(1:n_turbines) )
	939	ALLOCATE( u_inflow_l(1:n_turbines) )
	940	ALLOCATE( wdir_l(1:n_turbines) )
	941	ALLOCATE( yaw_angle_l(1:n_turbines) )
	942
[1819]	943	!
[4497]	944	!-- Allocate 1D arrays (dimension = number of rotor segments):
	945	ALLOCATE( alpha_attack(1:nsegs_max) )
	946	ALLOCATE( chord(1:nsegs_max) )
	947	ALLOCATE( phi_rel(1:nsegs_max) )
	948	ALLOCATE( thrust_seg(1:nsegs_max) )
	949	ALLOCATE( torque_seg_y(1:nsegs_max) )
	950	ALLOCATE( torque_seg_z(1:nsegs_max) )
	951	ALLOCATE( turb_cd(1:nsegs_max) )
	952	ALLOCATE( turb_cl(1:nsegs_max) )
	953	ALLOCATE( vrel(1:nsegs_max) )
	954	ALLOCATE( vtheta(1:nsegs_max) )
[1819]	955
	956	!
[4497]	957	!-- Allocate 2D arrays (dimension = number of rotor rings and segments):
	958	ALLOCATE( rbx(1:nrings_max,1:nsegs_max) )
	959	ALLOCATE( rby(1:nrings_max,1:nsegs_max) )
	960	ALLOCATE( rbz(1:nrings_max,1:nsegs_max) )
	961	ALLOCATE( thrust_ring(1:nrings_max,1:nsegs_max) )
	962	ALLOCATE( torque_ring_y(1:nrings_max,1:nsegs_max) )
	963	ALLOCATE( torque_ring_z(1:nrings_max,1:nsegs_max) )
[1819]	964
	965	!
[4497]	966	!-- Allocate additional 2D arrays:
	967	ALLOCATE( rotx(1:n_turbines,1:3) )
	968	ALLOCATE( roty(1:n_turbines,1:3) )
	969	ALLOCATE( rotz(1:n_turbines,1:3) )
[1819]	970
	971	!
[4497]	972	!-- Allocate 3D arrays (dimension = number of grid points):
	973	ALLOCATE( nac_cd_surf(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	974	ALLOCATE( rot_tend_x(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	975	ALLOCATE( rot_tend_y(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	976	ALLOCATE( rot_tend_z(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	977	ALLOCATE( thrust(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	978	ALLOCATE( torque_y(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	979	ALLOCATE( torque_z(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	980	ALLOCATE( tow_cd_surf(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
[1819]	981
	982	!
[4497]	983	!-- Allocate additional 3D arrays:
	984	ALLOCATE( u_int(1:n_turbines,1:nrings_max,1:nsegs_max) )
	985	ALLOCATE( u_int_1_l(1:n_turbines,1:nrings_max,1:nsegs_max) )
	986	ALLOCATE( v_int(1:n_turbines,1:nrings_max,1:nsegs_max) )
	987	ALLOCATE( v_int_1_l(1:n_turbines,1:nrings_max,1:nsegs_max) )
	988	ALLOCATE( w_int(1:n_turbines,1:nrings_max,1:nsegs_max) )
	989	ALLOCATE( w_int_1_l(1:n_turbines,1:nrings_max,1:nsegs_max) )
[1819]	990
	991	!
[4497]	992	!-- All of the arrays are initialized with a value of zero:
	993	i_hub(:) = 0
	994	i_smear(:) = 0
	995	j_hub(:) = 0
	996	j_smear(:) = 0
	997	k_hub(:) = 0
	998	k_smear(:) = 0
[1819]	999
[4497]	1000	torque_total(:) = 0.0_wp
	1001	thrust_rotor(:) = 0.0_wp
[2563]	1002
[4497]	1003	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
	1004	generator_speed(:) = 0.0_wp
	1005	generator_speed_old(:) = 0.0_wp
	1006	generator_speed_f(:) = 0.0_wp
	1007	generator_speed_f_old(:) = 0.0_wp
	1008	pitch_angle_old(:) = 0.0_wp
	1009	torque_gen(:) = 0.0_wp
	1010	torque_gen_old(:) = 0.0_wp
	1011	ENDIF
[1819]	1012
[4497]	1013	yawdir(:) = 0.0_wp
	1014	wdir_l(:) = 0.0_wp
	1015	wdir(:) = 0.0_wp
	1016	u_inflow(:) = 0.0_wp
	1017	u_inflow_l(:) = 0.0_wp
	1018	yaw_angle_l(:) = 0.0_wp
	1019
[1819]	1020	!
[4497]	1021	!-- Allocate 1D arrays (dimension = number of rotor segments):
	1022	alpha_attack(:) = 0.0_wp
	1023	chord(:) = 0.0_wp
	1024	phi_rel(:) = 0.0_wp
	1025	thrust_seg(:) = 0.0_wp
	1026	torque_seg_y(:) = 0.0_wp
	1027	torque_seg_z(:) = 0.0_wp
	1028	turb_cd(:) = 0.0_wp
	1029	turb_cl(:) = 0.0_wp
	1030	vrel(:) = 0.0_wp
	1031	vtheta(:) = 0.0_wp
[1819]	1032
[4497]	1033	rbx(:,:) = 0.0_wp
	1034	rby(:,:) = 0.0_wp
	1035	rbz(:,:) = 0.0_wp
	1036	thrust_ring(:,:) = 0.0_wp
	1037	torque_ring_y(:,:) = 0.0_wp
	1038	torque_ring_z(:,:) = 0.0_wp
[1819]	1039
[4497]	1040	rotx(:,:) = 0.0_wp
	1041	roty(:,:) = 0.0_wp
	1042	rotz(:,:) = 0.0_wp
[1819]	1043
[4497]	1044	nac_cd_surf(:,:,:) = 0.0_wp
	1045	rot_tend_x(:,:,:) = 0.0_wp
	1046	rot_tend_y(:,:,:) = 0.0_wp
	1047	rot_tend_z(:,:,:) = 0.0_wp
	1048	thrust(:,:,:) = 0.0_wp
	1049	torque_y(:,:,:) = 0.0_wp
	1050	torque_z(:,:,:) = 0.0_wp
	1051	tow_cd_surf(:,:,:) = 0.0_wp
[1819]	1052
[4497]	1053	u_int(:,:,:) = 0.0_wp
	1054	u_int_1_l(:,:,:) = 0.0_wp
	1055	v_int(:,:,:) = 0.0_wp
	1056	v_int_1_l(:,:,:) = 0.0_wp
	1057	w_int(:,:,:) = 0.0_wp
	1058	w_int_1_l(:,:,:) = 0.0_wp
[1819]	1059
	1060
[4497]	1061	END SUBROUTINE wtm_init_arrays
[1819]	1062
	1063
[4497]	1064	!--------------------------------------------------------------------------------------------------!
[1819]	1065	! Description:
	1066	! ------------
[1839]	1067	!> Initialization of the wind turbine model
[4497]	1068	!--------------------------------------------------------------------------------------------------!
	1069	SUBROUTINE wtm_init
[1819]	1070
[4457]	1071
[4497]	1072	USE control_parameters, &
	1073	ONLY: dz_stretch_level_start
[1819]	1074
[4497]	1075	USE exchange_horiz_mod, &
	1076	ONLY: exchange_horiz
	1077
	1078	IMPLICIT NONE
	1079
	1080
	1081
	1082	INTEGER(iwp) :: i !< running index
	1083	INTEGER(iwp) :: j !< running index
	1084	INTEGER(iwp) :: k !< running index
	1085
	1086
[1819]	1087	!
[4497]	1088	!-- Help variables for the smearing function:
	1089	REAL(wp) :: eps_kernel !<
	1090
[1839]	1091	!
[4497]	1092	!-- Help variables for calculation of the tower drag:
	1093	INTEGER(iwp) :: tower_n !<
	1094	INTEGER(iwp) :: tower_s !<
[1819]	1095
[4497]	1096	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: index_nacb !<
	1097	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: index_nacl !<
	1098	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: index_nacr !<
	1099	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: index_nact !<
	1100
	1101	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: circle_points !<
	1102
	1103
	1104	IF ( debug_output ) CALL debug_message( 'wtm_init', 'start' )
	1105
	1106	ALLOCATE( index_nacb(1:n_turbines) )
	1107	ALLOCATE( index_nacl(1:n_turbines) )
	1108	ALLOCATE( index_nacr(1:n_turbines) )
	1109	ALLOCATE( index_nact(1:n_turbines) )
	1110
[1839]	1111	!
[4497]	1112	!--------------------------------------------------------------------------------------------------!
	1113	!-- Calculation of parameters for the regularization kernel (smearing of the forces)
	1114	!--------------------------------------------------------------------------------------------------!
[1819]	1115	!
[4497]	1116	!-- In the following, some of the required parameters for the smearing will be calculated:
[1819]	1117
[4497]	1118	!-- The kernel is set equal to twice the grid spacing which has turned out to be a reasonable
	1119	!-- value (see e.g. Troldborg et al. (2013), Wind Energy, DOI: 10.1002/we.1608):
[4528]	1120	eps_kernel = smearing_kernel_size * dx
[1819]	1121	!
[4497]	1122	!-- The zero point (eps_min) of the polynomial function must be the following if the integral of
	1123	!-- the polynomial function (for values < eps_min) shall be equal to the integral of the Gaussian
	1124	!-- function used before:
	1125	eps_min = ( 105.0_wp / 32.0_wp )*( 1.0_wp / 3.0_wp ) &
	1126	pi*( 1.0_wp / 6.0_wp ) eps_kernel
[1819]	1127	!
[4497]	1128	!-- Stretching (non-uniform grid spacing) is not considered in the wind turbine model.
	1129	!-- Therefore, vertical stretching has to be applied above the area where the wtm is active.
	1130	!-- ABS (...) is required because the default value of dz_stretch_level_start is -9999999.9_wp
	1131	!-- (negative):
	1132	IF ( ABS( dz_stretch_level_start(1) ) <= MAXVAL( hub_z(1:n_turbines) ) + &
	1133	MAXVAL( rotor_radius(1:n_turbines) ) + &
	1134	eps_min) THEN
	1135	WRITE( message_string, * ) 'The lowest level where vertical stretching is applied has ' // &
	1136	'to be greater than ',MAXVAL( hub_z(1:n_turbines) ) &
	1137	+ MAXVAL( rotor_radius(1:n_turbines) ) + eps_min
	1138	CALL message( 'wtm_init', 'PA0484', 1, 2, 0, 6, 0 )
	1139	ENDIF
[3065]	1140	!
[4497]	1141	!-- Square of eps_min:
	1142	eps_min2 = eps_min**2
[1819]	1143	!
[4497]	1144	!-- Parameters in the polynomial function:
	1145	pol_a = 1.0_wp / eps_min**4
	1146	pol_b = 2.0_wp / eps_min**2
[1819]	1147	!
[4497]	1148	!-- Normalization factor which is the inverse of the integral of the smearing function:
	1149	eps_factor = 105.0_wp / ( 32.0_wp * pi * eps_min**3 )
	1150
	1151	!-- Change tilt angle to rad:
	1152	tilt_angle = tilt_angle * pi / 180.0_wp
	1153
[1819]	1154	!
[4497]	1155	!-- Change yaw angle to rad:
	1156	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
	1157	yaw_angle(:) = yaw_angle(:) * pi / 180.0_wp
	1158	ENDIF
[1819]	1159
[1864]	1160
[4497]	1161	DO inot = 1, n_turbines
[1819]	1162	!
[4497]	1163	!-- Rotate the rotor coordinates in case yaw and tilt are defined:
	1164	CALL wtm_rotate_rotor( inot )
	1165
[1819]	1166	!
[4497]	1167	!-- Determine the indices of the hub height:
	1168	i_hub(inot) = INT( hub_x(inot) / dx )
	1169	j_hub(inot) = INT( ( hub_y(inot) + 0.5_wp * dy ) / dy )
	1170	k_hub(inot) = INT( ( hub_z(inot) + 0.5_wp * dz(1) ) / dz(1) )
[1819]	1171
	1172	!
[4497]	1173	!-- Determining the area to which the smearing of the forces is applied.
	1174	!-- As smearing now is effectively applied only for distances smaller than eps_min, the
	1175	!-- smearing area can be further limited and regarded as a function of eps_min:
	1176	i_smear(inot) = CEILING( ( rotor_radius(inot) + eps_min ) / dx )
	1177	j_smear(inot) = CEILING( ( rotor_radius(inot) + eps_min ) / dy )
	1178	k_smear(inot) = CEILING( ( rotor_radius(inot) + eps_min ) / dz(1) )
[1819]	1179
[4497]	1180	ENDDO
	1181
[1819]	1182	!
[4497]	1183	!-- Call the wtm_init_speed_control subroutine and calculate the local rotor_speed for the
	1184	!-- respective processor:
	1185	IF ( speed_control) THEN
[2792]	1186
[4497]	1187	CALL wtm_init_speed_control
[2792]	1188
[4497]	1189	IF ( TRIM( initializing_actions ) == 'read_restart_data' ) THEN
[2792]	1190
[4497]	1191	DO inot = 1, n_turbines
[2792]	1192
[4497]	1193	IF ( nxl > i_hub(inot) ) THEN
	1194	torque_gen(inot) = 0.0_wp
	1195	generator_speed_f(inot) = 0.0_wp
	1196	rotor_speed_l(inot) = 0.0_wp
	1197	ENDIF
[2792]	1198
[4497]	1199	IF ( nxr < i_hub(inot) ) THEN
	1200	torque_gen(inot) = 0.0_wp
	1201	generator_speed_f(inot) = 0.0_wp
	1202	rotor_speed_l(inot) = 0.0_wp
	1203	ENDIF
[2792]	1204
[4497]	1205	IF ( nys > j_hub(inot) ) THEN
	1206	torque_gen(inot) = 0.0_wp
	1207	generator_speed_f(inot) = 0.0_wp
	1208	rotor_speed_l(inot) = 0.0_wp
	1209	ENDIF
[2792]	1210
[4497]	1211	IF ( nyn < j_hub(inot) ) THEN
	1212	torque_gen(inot) = 0.0_wp
	1213	generator_speed_f(inot) = 0.0_wp
	1214	rotor_speed_l(inot) = 0.0_wp
	1215	ENDIF
[2792]	1216
[4497]	1217	IF ( ( nxl <= i_hub(inot) ) .AND. ( nxr >= i_hub(inot) ) ) THEN
	1218	IF ( ( nys <= j_hub(inot) ) .AND. ( nyn >= j_hub(inot) ) ) THEN
[2792]	1219
[4497]	1220	rotor_speed_l(inot) = generator_speed(inot) / gear_ratio
	1221
[2792]	1222	ENDIF
[4497]	1223	ENDIF
[2792]	1224
[4497]	1225	END DO
[2792]	1226
	1227	ENDIF
	1228
[4497]	1229	ENDIF
	1230
[2792]	1231	!
[4497]	1232	!--------------------------------------------------------------------------------------------------!
	1233	!-- Determine the area within each grid cell that overlaps with the area of the nacelle and the
	1234	!-- tower (needed for calculation of the forces)
	1235	!--------------------------------------------------------------------------------------------------!
[1819]	1236	!
[4497]	1237	!-- Note: so far this is only a 2D version, in that the mean flow is perpendicular to the rotor
	1238	!-- area.
[1819]	1239
	1240	!
[4497]	1241	!-- Allocation of the array containing information on the intersection points between rotor disk
	1242	!-- and the numerical grid:
	1243	upper_end = ( ny + 1 ) * 10000
[1819]	1244
[4497]	1245	ALLOCATE( circle_points(1:2,1:upper_end) )
[1819]	1246
[4497]	1247	circle_points(:,:) = 0.0_wp
	1248
	1249
	1250	DO inot = 1, n_turbines ! loop over number of turbines
[1819]	1251	!
[4497]	1252	!-- Determine the grid index (u-grid) that corresponds to the location of the rotor center
	1253	!-- (reduces the amount of calculations in the case that the mean flow is perpendicular to the
	1254	!-- rotor area):
	1255	i = i_hub(inot)
[1819]	1256
	1257	!
[4497]	1258	!-- Determine the left and the right edge of the nacelle (corresponding grid point indices):
	1259	index_nacl(inot) = INT( ( hub_y(inot) - nacelle_radius(inot) + 0.5_wp * dy ) / dy )
	1260	index_nacr(inot) = INT( ( hub_y(inot) + nacelle_radius(inot) + 0.5_wp * dy ) / dy )
[1819]	1261	!
[4497]	1262	!-- Determine the bottom and the top edge of the nacelle (corresponding grid point indices).
	1263	!-- The grid point index has to be increased by 1, as the first level for the u-component
	1264	!-- (index 0) is situated below the surface. All points between z=0 and z=dz/s would already
	1265	!-- be contained in grid box 1:
	1266	index_nacb(inot) = INT( ( hub_z(inot) - nacelle_radius(inot) ) / dz(1) ) + 1
	1267	index_nact(inot) = INT( ( hub_z(inot) + nacelle_radius(inot) ) / dz(1) ) + 1
[1819]	1268
	1269	!
[4497]	1270	!-- Determine the indices of the grid boxes containing the left and the right boundaries of
	1271	!-- the tower:
	1272	tower_n = ( hub_y(inot) + 0.5_wp * tower_diameter(inot) - 0.5_wp * dy ) / dy
	1273	tower_s = ( hub_y(inot) - 0.5_wp * tower_diameter(inot) - 0.5_wp * dy ) / dy
[1819]	1274
	1275	!
[4497]	1276	!-- Determine the fraction of the grid box area overlapping with the tower area and multiply
	1277	!-- it with the drag of the tower:
	1278	IF ( ( nxlg <= i ) .AND. ( nxrg >= i ) ) THEN
[1819]	1279
[4497]	1280	DO j = nys, nyn
[1819]	1281	!
[4497]	1282	!-- Loop from south to north boundary of tower:
	1283	IF ( ( j >= tower_s ) .AND. ( j <= tower_n ) ) THEN
[1839]	1284
[4497]	1285	DO k = nzb, nzt
[1819]	1286
[4497]	1287	IF ( k == k_hub(inot) ) THEN
	1288	IF ( tower_n - tower_s >= 1 ) THEN
[1839]	1289	!
[4497]	1290	!-- Leftmost and rightmost grid box:
	1291	IF ( j == tower_s ) THEN
	1292	tow_cd_surf(k,j,i) = ( hub_z(inot) - &
	1293	( k_hub(inot) * dz(1) - 0.5_wp * dz(1) ) ) * & ! extension in z-direction
	1294	( ( tower_s + 1.0_wp + 0.5_wp ) * dy - &
	1295	( hub_y(inot) - 0.5_wp * tower_diameter(inot) ) ) * & ! extension in y-direction
	1296	tower_cd(inot)
	1297
	1298	ELSEIF ( j == tower_n ) THEN
	1299	tow_cd_surf(k,j,i) = ( hub_z(inot) - &
	1300	( k_hub(inot) * dz(1) - 0.5_wp * dz(1) ) ) * & ! extension in z-direction
	1301	( ( hub_y(inot) + 0.5_wp * tower_diameter(inot) ) - &
	1302	( tower_n + 0.5_wp ) * dy ) * & ! extension in y-direction
	1303	tower_cd(inot)
[1819]	1304	!
[4497]	1305	!-- Grid boxes inbetween (where tow_cd_surf = grid box area):
[1819]	1306	ELSE
[4497]	1307	tow_cd_surf(k,j,i) = ( hub_z(inot) - &
	1308	( k_hub(inot) * dz(1) - 0.5_wp * dz(1) ) ) * dy * &
	1309	tower_cd(inot)
[1819]	1310	ENDIF
[1839]	1311	!
[4497]	1312	!-- Tower lies completely within one grid box:
	1313	ELSE
	1314	tow_cd_surf(k,j,i) = ( hub_z(inot) - ( k_hub(inot) * &
	1315	dz(1) - 0.5_wp * dz(1) ) ) * &
	1316	tower_diameter(inot) * tower_cd(inot)
	1317	ENDIF
[1839]	1318	!
[4497]	1319	!-- In case that k is smaller than k_hub the following actions are carried out:
	1320	ELSEIF ( k < k_hub(inot) ) THEN
	1321
	1322	IF ( ( tower_n - tower_s ) >= 1 ) THEN
[1839]	1323	!
[4497]	1324	!-- Leftmost and rightmost grid box:
	1325	IF ( j == tower_s ) THEN
	1326	tow_cd_surf(k,j,i) = dz(1) * ( ( tower_s + 1 + 0.5_wp ) * dy - &
	1327	( hub_y(inot) - 0.5_wp * tower_diameter(inot) ) ) &
	1328	* tower_cd(inot)
	1329
	1330	ELSEIF ( j == tower_n ) THEN
	1331	tow_cd_surf(k,j,i) = dz(1) * ( ( hub_y(inot) + 0.5_wp * &
	1332	tower_diameter(inot) ) - ( tower_n + 0.5_wp ) &
	1333	* dy ) * tower_cd(inot)
[1839]	1334	!
[4497]	1335	!-- Grid boxes inbetween (where tow_cd_surf = grid box area):
[1819]	1336	ELSE
[4497]	1337	tow_cd_surf(k,j,i) = dz(1) * dy * tower_cd(inot)
	1338	ENDIF
	1339	!
	1340	!-- Tower lies completely within one grid box:
	1341	ELSE
	1342	tow_cd_surf(k,j,i) = dz(1) * tower_diameter(inot) * tower_cd(inot)
	1343	ENDIF ! end if larger than grid box
[1839]	1344
[4497]	1345	ENDIF ! end if k == k_hub
[1839]	1346
[4497]	1347	ENDDO ! end loop over k
[1839]	1348
[4497]	1349	ENDIF ! end if inside north and south boundary of tower
[1839]	1350
[4497]	1351	ENDDO ! end loop over j
[1839]	1352
[4497]	1353	ENDIF ! end if hub inside domain + ghostpoints
[1819]	1354
[4497]	1355
	1356	CALL exchange_horiz( tow_cd_surf, nbgp )
	1357
[1839]	1358	!
[4497]	1359	!-- Calculation of the nacelle area
	1360	!-- CAUTION: Currently disabled due to segmentation faults on the FLOW HPC cluster (Oldenburg)
[1864]	1361	!!
[4497]	1362	!!-- Tabulate the points on the circle that are required in the following for the calculation
	1363	!!-- of the Riemann integral (node points; they are called circle_points in the following):
[1864]	1364	!
[4497]	1365	! dy_int = dy / 10000.0_wp
[1864]	1366	!
[4497]	1367	! DO i_ip = 1, upper_end
	1368	! yvalue = dy_int * ( i_ip - 0.5_wp ) + 0.5_wp * dy !<--- segmentation fault
	1369	! sqrt_arg = nacelle_radius(inot)2 - ( yvalue - hub_y(inot) )2 !<--- segmentation fault
	1370	! IF ( sqrt_arg >= 0.0_wp ) THEN
[1864]	1371	!!
[4497]	1372	!!-- bottom intersection point
	1373	! circle_points(1,i_ip) = hub_z(inot) - SQRT( sqrt_arg )
[1864]	1374	!!
[4497]	1375	!!-- top intersection point
	1376	! circle_points(2,i_ip) = hub_z(inot) + SQRT( sqrt_arg ) !<--- segmentation fault
	1377	! ELSE
	1378	! circle_points(:,i_ip) = -111111 !<--- segmentation fault
	1379	! ENDIF
	1380	! ENDDO
[1864]	1381	!
	1382	!
[4497]	1383	! DO j = nys, nyn
[1864]	1384	!!
[4497]	1385	!!-- In case that the grid box is located completely outside the nacelle (y) it can
	1386	!!-- automatically be stated that there is no overlap between the grid box and the nacelle
	1387	!!-- and consequently we can set nac_cd_surf(:,j,i) = 0.0:
	1388	! IF ( ( j >= index_nacl(inot) ) .AND. ( j <= index_nacr(inot) ) ) THEN
	1389	! DO k = nzb+1, nzt
[1864]	1390	!!
[4497]	1391	!!-- In case that the grid box is located completely outside the nacelle (z) it can
	1392	!!-- automatically be stated that there is no overlap between the grid box and the
	1393	!!-- nacelle and consequently we can set nac_cd_surf(k,j,i) = 0.0:
	1394	! IF ( ( k >= index_nacb(inot) ) .OR. &
	1395	! ( k <= index_nact(inot) ) ) THEN
[1864]	1396	!!
[4497]	1397	!!-- For all other cases Riemann integrals are calculated. Here, the points on the
	1398	!!-- circle that have been determined above are used in order to calculate the
	1399	!!-- overlap between the gridbox and the nacelle area (area approached by 10000
	1400	!!-- rectangulars dz_int * dy_int):
	1401	! DO i_ipg = 1, 10000
	1402	! dz_int = dz
	1403	! i_ip = j * 10000 + i_ipg
[1864]	1404	!!
[4497]	1405	!!-- Determine the vertical extension dz_int of the circle within the current
	1406	!!-- grid box:
	1407	! IF ( ( circle_points(2,i_ip) < zw(k) ) .AND. & !<--- segmentation fault
	1408	! ( circle_points(2,i_ip) >= zw(k-1) ) ) THEN
	1409	! dz_int = dz_int - & !<--- segmentation fault
	1410	! ( zw(k) - circle_points(2,i_ip) )
	1411	! ENDIF
	1412	! IF ( ( circle_points(1,i_ip) <= zw(k) ) .AND. & !<--- segmentation fault
	1413	! ( circle_points(1,i_ip) > zw(k-1) ) ) THEN
	1414	! dz_int = dz_int - &
	1415	! ( circle_points(1,i_ip) - zw(k-1) )
	1416	! ENDIF
	1417	! IF ( zw(k-1) > circle_points(2,i_ip) ) THEN
	1418	! dz_int = 0.0_wp
	1419	! ENDIF
	1420	! IF ( zw(k) < circle_points(1,i_ip) ) THEN
	1421	! dz_int = 0.0_wp
	1422	! ENDIF
	1423	! IF ( ( nxlg <= i ) .AND. ( nxrg >= i ) ) THEN
	1424	! nac_cd_surf(k,j,i) = nac_cd_surf(k,j,i) + & !<--- segmentation fault
	1425	! dy_int * dz_int * nacelle_cd(inot)
	1426	! ENDIF
	1427	! ENDDO
	1428	! ENDIF
	1429	! ENDDO
	1430	! ENDIF
	1431	!
	1432	! ENDDO
	1433	!
	1434	! CALL exchange_horiz( nac_cd_surf, nbgp ) !<--- segmentation fault
[1819]	1435
[4497]	1436	ENDDO ! end of loop over turbines
[1819]	1437
[4497]	1438	tow_cd_surf = tow_cd_surf / ( dx * dy * dz(1) ) ! Normalize tower drag
	1439	nac_cd_surf = nac_cd_surf / ( dx * dy * dz(1) ) ! Normalize nacelle drag
[1819]	1440
[4497]	1441	CALL wtm_read_blade_tables
[3685]	1442
[4497]	1443	IF ( debug_output ) CALL debug_message( 'wtm_init', 'end' )
[1864]	1444
[4497]	1445	END SUBROUTINE wtm_init
[1864]	1446
[4497]	1447
	1448
[4423]	1449	SUBROUTINE wtm_init_output
[4497]	1450
	1451
	1452	! INTEGER(iwp) :: ntimesteps !< number of timesteps defined in NetCDF output file
	1453	! INTEGER(iwp) :: ntimesteps_max = 80000 !< number of maximum timesteps defined in NetCDF output file
	1454	INTEGER(iwp) :: return_value !< returned status value of called function
	1455
	1456	INTEGER(iwp) :: n !< running index
	1457
	1458	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: ndim !< dummy to write dimension
	1459
	1460
[4411]	1461	!
[4497]	1462	!-- Create NetCDF output file:
[4465]	1463	#if defined( __netcdf4 )
	1464	nc_filename = 'DATA_1D_TS_WTM_NETCDF' // TRIM( coupling_char )
[4423]	1465	return_value = dom_def_file( nc_filename, 'netcdf4-serial' )
[4465]	1466	#else
[4497]	1467	message_string = 'Wind turbine model output requires NetCDF version 4. ' // &
[4465]	1468	'No output file will be created.'
[4497]	1469	CALL message( 'wtm_init_output', 'PA0672', 0, 1, 0, 6, 0 )
[4465]	1470	#endif
[4423]	1471	IF ( myid == 0 ) THEN
[4411]	1472	!
[4497]	1473	!-- Define dimensions in output file:
[4447]	1474	ALLOCATE( ndim(1:n_turbines) )
	1475	DO n = 1, n_turbines
[4411]	1476	ndim(n) = n
	1477	ENDDO
[4497]	1478	return_value = dom_def_dim( nc_filename, &
	1479	dimension_name = 'turbine', &
	1480	output_type = 'int32', &
	1481	bounds = (/1_iwp, n_turbines/), &
[4411]	1482	values_int32 = ndim )
	1483	DEALLOCATE( ndim )
	1484
[4497]	1485	return_value = dom_def_dim( nc_filename, &
	1486	dimension_name = 'time', &
	1487	output_type = 'real32', &
	1488	bounds = (/1_iwp/), &
[4426]	1489	values_realwp = (/0.0_wp/) )
[4497]	1490
[4411]	1491	variable_name = 'x'
[4497]	1492	return_value = dom_def_var( nc_filename, &
	1493	variable_name = variable_name, &
	1494	dimension_names = (/'turbine'/), &
[4411]	1495	output_type = 'real32' )
[4465]	1496
[4411]	1497	variable_name = 'y'
[4497]	1498	return_value = dom_def_var( nc_filename, &
	1499	variable_name = variable_name, &
	1500	dimension_names = (/'turbine'/), &
[4411]	1501	output_type = 'real32' )
	1502
	1503	variable_name = 'z'
[4497]	1504	return_value = dom_def_var( nc_filename, &
	1505	variable_name = variable_name, &
	1506	dimension_names = (/'turbine'/), &
[4411]	1507	output_type = 'real32' )
	1508
[4465]	1509
	1510	variable_name = 'rotor_diameter'
[4497]	1511	return_value = dom_def_var( nc_filename, &
	1512	variable_name = variable_name, &
	1513	dimension_names = (/'turbine'/), &
[4465]	1514	output_type = 'real32' )
	1515
	1516	variable_name = 'tower_diameter'
[4497]	1517	return_value = dom_def_var( nc_filename, &
	1518	variable_name = variable_name, &
	1519	dimension_names = (/'turbine'/), &
[4465]	1520	output_type = 'real32' )
	1521
[4497]	1522	return_value = dom_def_att( nc_filename, &
	1523	variable_name = 'time', &
	1524	attribute_name = 'units', &
[4411]	1525	value = 'seconds since ' // origin_date_time )
[4465]	1526
[4497]	1527	return_value = dom_def_att( nc_filename, &
	1528	variable_name = 'x', &
	1529	attribute_name = 'units', &
[4411]	1530	value = 'm' )
	1531
[4497]	1532	return_value = dom_def_att( nc_filename, &
	1533	variable_name = 'y', &
	1534	attribute_name = 'units', &
	1535	value = 'm' )
[4411]	1536
[4497]	1537	return_value = dom_def_att( nc_filename, &
	1538	variable_name = 'z', &
	1539	attribute_name = 'units', &
[4465]	1540	value = 'm' )
[4411]	1541
[4497]	1542	return_value = dom_def_att( nc_filename, &
	1543	variable_name = 'rotor_diameter', &
	1544	attribute_name = 'units', &
[4465]	1545	value = 'm' )
	1546
[4497]	1547	return_value = dom_def_att( nc_filename, &
	1548	variable_name = 'tower_diameter', &
	1549	attribute_name = 'units', &
[4465]	1550	value = 'm' )
	1551
[4497]	1552	return_value = dom_def_att( nc_filename, &
	1553	variable_name = 'x', &
	1554	attribute_name = 'long_name', &
[4411]	1555	value = 'x location of rotor center' )
	1556
[4497]	1557	return_value = dom_def_att( nc_filename, &
	1558	variable_name = 'y', &
	1559	attribute_name = 'long_name', &
	1560	value = 'y location of rotor center' )
[4411]	1561
[4497]	1562	return_value = dom_def_att( nc_filename, &
	1563	variable_name = 'z', &
	1564	attribute_name = 'long_name', &
	1565	value = 'z location of rotor center' )
[4465]	1566
[4497]	1567	return_value = dom_def_att( nc_filename, &
	1568	variable_name = 'turbine_name', &
	1569	attribute_name = 'long_name', &
[4465]	1570	value = 'turbine name')
	1571
[4497]	1572	return_value = dom_def_att( nc_filename, &
	1573	variable_name = 'rotor_diameter', &
	1574	attribute_name = 'long_name', &
[4465]	1575	value = 'rotor diameter')
	1576
[4497]	1577	return_value = dom_def_att( nc_filename, &
	1578	variable_name = 'tower_diameter', &
	1579	attribute_name = 'long_name', &
[4465]	1580	value = 'tower diameter')
	1581
[4497]	1582	return_value = dom_def_att( nc_filename, &
	1583	variable_name = 'time', &
	1584	attribute_name = 'standard_name', &
[4411]	1585	value = 'time')
	1586
[4497]	1587	return_value = dom_def_att( nc_filename, &
	1588	variable_name = 'time', &
	1589	attribute_name = 'axis', &
[4411]	1590	value = 'T')
	1591
[4497]	1592	return_value = dom_def_att( nc_filename, &
	1593	variable_name = 'x', &
	1594	attribute_name = 'axis', &
[4411]	1595	value = 'X' )
	1596
[4497]	1597	return_value = dom_def_att( nc_filename, &
	1598	variable_name = 'y', &
	1599	attribute_name = 'axis', &
[4465]	1600	value = 'Y' )
[4411]	1601
[4497]	1602
[4465]	1603	variable_name = 'generator_power'
[4497]	1604	return_value = dom_def_var( nc_filename, &
	1605	variable_name = variable_name, &
	1606	dimension_names = (/ 'turbine', 'time ' /), &
[4465]	1607	output_type = 'real32' )
[4411]	1608
[4497]	1609	return_value = dom_def_att( nc_filename, &
	1610	variable_name = variable_name, &
	1611	attribute_name = 'units', &
	1612	value = 'W' )
[4465]	1613
[4411]	1614	variable_name = 'generator_speed'
[4497]	1615	return_value = dom_def_var( nc_filename, &
	1616	variable_name = variable_name, &
	1617	dimension_names = (/ 'turbine', 'time ' /), &
[4411]	1618	output_type = 'real32' )
[4465]	1619
[4497]	1620	return_value = dom_def_att( nc_filename, &
	1621	variable_name = variable_name, &
	1622	attribute_name = 'units', &
[4411]	1623	value = 'rad/s' )
[4465]	1624
[4411]	1625	variable_name = 'generator_torque'
[4497]	1626	return_value = dom_def_var( nc_filename, &
	1627	variable_name = variable_name, &
	1628	dimension_names = (/ 'turbine', 'time ' /), &
[4411]	1629	output_type = 'real32' )
[4497]	1630
	1631	return_value = dom_def_att( nc_filename, &
	1632	variable_name = variable_name, &
	1633	attribute_name = 'units', &
[4411]	1634	value = 'Nm' )
	1635
	1636	variable_name = 'pitch_angle'
[4497]	1637	return_value = dom_def_var( nc_filename, &
	1638	variable_name = variable_name, &
	1639	dimension_names = (/ 'turbine', 'time ' /), &
[4411]	1640	output_type = 'real32' )
[4465]	1641
[4497]	1642	return_value = dom_def_att( nc_filename, &
	1643	variable_name = variable_name, &
	1644	attribute_name = 'units', &
[4465]	1645	value = 'degrees' )
	1646
	1647	variable_name = 'rotor_power'
[4497]	1648	return_value = dom_def_var( nc_filename, &
	1649	variable_name = variable_name, &
	1650	dimension_names = (/ 'turbine', 'time ' /), &
[4411]	1651	output_type = 'real32' )
[4465]	1652
[4497]	1653	return_value = dom_def_att( nc_filename, &
	1654	variable_name = variable_name, &
	1655	attribute_name = 'units', &
	1656	value = 'W' )
	1657
[4465]	1658	variable_name = 'rotor_speed'
[4497]	1659	return_value = dom_def_var( nc_filename, &
	1660	variable_name = variable_name, &
	1661	dimension_names = (/ 'turbine', 'time ' /), &
[4411]	1662	output_type = 'real32' )
[4497]	1663
	1664	return_value = dom_def_att( nc_filename, &
	1665	variable_name = variable_name, &
	1666	attribute_name = 'units', &
[4465]	1667	value = 'rad/s' )
	1668
	1669	variable_name = 'rotor_thrust'
[4497]	1670	return_value = dom_def_var( nc_filename, &
	1671	variable_name = variable_name, &
	1672	dimension_names = (/ 'turbine', 'time ' /), &
[4411]	1673	output_type = 'real32' )
[4465]	1674
[4497]	1675	return_value = dom_def_att( nc_filename, &
	1676	variable_name = variable_name, &
	1677	attribute_name = 'units', &
	1678	value = 'N' )
	1679
[4465]	1680	variable_name = 'rotor_torque'
[4497]	1681	return_value = dom_def_var( nc_filename, &
	1682	variable_name = variable_name, &
	1683	dimension_names = (/ 'turbine', 'time ' /), &
[4465]	1684	output_type = 'real32' )
[4497]	1685
	1686	return_value = dom_def_att( nc_filename, &
	1687	variable_name = variable_name, &
	1688	attribute_name = 'units', &
[4465]	1689	value = 'Nm' )
	1690
[4411]	1691	variable_name = 'wind_direction'
[4497]	1692	return_value = dom_def_var( nc_filename, &
	1693	variable_name = variable_name, &
	1694	dimension_names = (/ 'turbine', 'time ' /), &
[4411]	1695	output_type = 'real32' )
[4465]	1696
[4497]	1697	return_value = dom_def_att( nc_filename, &
	1698	variable_name = variable_name, &
	1699	attribute_name = 'units', &
	1700	value = 'degrees' )
	1701
[4411]	1702	variable_name = 'yaw_angle'
[4497]	1703	return_value = dom_def_var( nc_filename, &
	1704	variable_name = variable_name, &
	1705	dimension_names = (/ 'turbine', 'time ' /), &
[4411]	1706	output_type = 'real32' )
[4423]	1707
[4497]	1708	return_value = dom_def_att( nc_filename, &
	1709	variable_name = variable_name, &
	1710	attribute_name = 'units', &
	1711	value = 'degrees' )
	1712
[4465]	1713	ENDIF
[4423]	1714	END SUBROUTINE
[4497]	1715
	1716	!--------------------------------------------------------------------------------------------------!
[1864]	1717	! Description:
	1718	! ------------
[4497]	1719	!> Read in layout of the rotor blade , the lift and drag tables and the distribution of lift and
	1720	!> drag tables along the blade
	1721	!--------------------------------------------------------------------------------------------------!
[1912]	1722	!
[4497]	1723	SUBROUTINE wtm_read_blade_tables
[1819]	1724
[1839]	1725
[4497]	1726	IMPLICIT NONE
[1864]	1727
[4497]	1728	CHARACTER(200) :: chmess !< Read in string
[1839]	1729
[4497]	1730	INTEGER(iwp) :: ii !< running index
	1731	INTEGER(iwp) :: jj !< running index
[1839]	1732
[4497]	1733	INTEGER(iwp) :: ierrn !<
[1839]	1734
[4497]	1735	INTEGER(iwp) :: dlen !< no. rows of local table
	1736	INTEGER(iwp) :: dlenbl !< no. rows of cd, cl table
	1737	INTEGER(iwp) :: dlenbl_int !< no. rows of interpolated cd, cl tables
	1738	INTEGER(iwp) :: ialpha !< table position of current alpha value
	1739	INTEGER(iwp) :: iialpha !<
	1740	INTEGER(iwp) :: iir !<
	1741	INTEGER(iwp) :: radres !< radial resolution
	1742	INTEGER(iwp) :: t1 !< no. of airfoil
	1743	INTEGER(iwp) :: t2 !< no. of airfoil
	1744	INTEGER(iwp) :: trow !<
[1864]	1745
	1746
[4497]	1747	REAL(wp) :: alpha_attack_i !<
	1748	REAL(wp) :: weight_a !<
	1749	REAL(wp) :: weight_b !<
[1864]	1750
[4497]	1751	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: ttoint1 !<
	1752	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: ttoint2 !<
[1864]	1753
[4497]	1754	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cd_sel1 !<
	1755	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cd_sel2 !<
	1756	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cl_sel1 !<
	1757	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cl_sel2 !<
	1758	REAL(wp), DIMENSION(:), ALLOCATABLE :: read_cl_cd !< read in var array
[1864]	1759
[4497]	1760	REAL(wp), DIMENSION(:), ALLOCATABLE :: alpha_attack_tab !<
	1761	REAL(wp), DIMENSION(:), ALLOCATABLE :: trad1 !<
	1762	REAL(wp), DIMENSION(:), ALLOCATABLE :: trad2 !<
	1763	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: turb_cd_table !<
	1764	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: turb_cl_table !<
[1864]	1765
[4497]	1766	ALLOCATE ( read_cl_cd(1:2 * n_airfoils + 1) )
[1864]	1767
[4497]	1768	!
	1769	!-- Read in the distribution of lift and drag tables along the blade, the layout of the rotor
	1770	!-- blade and the lift and drag tables:
	1771	OPEN ( 90, FILE='WTM_DATA', STATUS='OLD', FORM='FORMATTED', IOSTAT=ierrn )
[1864]	1772
[4497]	1773	IF ( ierrn /= 0 ) THEN
	1774	message_string = 'file WTM_DATA does not exist'
	1775	CALL message( 'wtm_init', 'PA0464', 1, 2, 0, 6, 0 )
	1776	ENDIF
[1864]	1777	!
[4497]	1778	!-- Read distribution table:
	1779	dlen = 0
[1864]	1780
[4497]	1781	READ ( 90, '(3/)' )
[1864]	1782
[4497]	1783	rloop3: DO
	1784	READ ( 90, *, IOSTAT=ierrn ) chmess
	1785	IF ( ierrn < 0 .OR. chmess == '#' .OR. chmess == '') EXIT rloop3
	1786	dlen = dlen + 1
	1787	ENDDO rloop3
[1864]	1788
[4497]	1789	ALLOCATE( trad1(1:dlen), trad2(1:dlen), ttoint1(1:dlen), ttoint2(1:dlen) )
[1864]	1790
[4497]	1791	DO jj = 1, dlen+1
	1792	BACKSPACE ( 90, IOSTAT=ierrn )
	1793	ENDDO
[1819]	1794
[4497]	1795	DO jj = 1, dlen
	1796	READ ( 90, * ) trad1(jj), trad2(jj), ttoint1(jj), ttoint2(jj)
	1797	ENDDO
	1798
[1864]	1799	!
[4497]	1800	!-- Read layout table:
	1801	dlen = 0
[1819]	1802
[4497]	1803	READ ( 90, '(3/)')
[1864]	1804
[4497]	1805	rloop1: DO
	1806	READ ( 90, *, IOSTAT=ierrn ) chmess
	1807	IF ( ierrn < 0 .OR. chmess == '#' .OR. chmess == '') EXIT rloop1
	1808	dlen = dlen + 1
	1809	ENDDO rloop1
[1864]	1810
[4497]	1811	ALLOCATE( lrd(1:dlen), ard(1:dlen), crd(1:dlen) )
	1812	DO jj = 1, dlen + 1
	1813	BACKSPACE ( 90, IOSTAT=ierrn )
	1814	ENDDO
	1815	DO jj = 1, dlen
	1816	READ ( 90, * ) lrd(jj), ard(jj), crd(jj)
	1817	ENDDO
[1864]	1818
[4497]	1819	!
	1820	!-- Read tables (turb_cl(alpha),turb_cd(alpha) for the different profiles:
	1821	dlen = 0
[1864]	1822
[4497]	1823	READ ( 90, '(3/)' )
[1864]	1824
[4497]	1825	rloop2: DO
	1826	READ ( 90, *, IOSTAT=ierrn ) chmess
	1827	IF ( ierrn < 0 .OR. chmess == '#' .OR. chmess == '') EXIT rloop2
	1828	dlen = dlen + 1
	1829	ENDDO rloop2
[1864]	1830
[4497]	1831	ALLOCATE( alpha_attack_tab(1:dlen), turb_cl_table(1:dlen,1:n_airfoils), &
	1832	turb_cd_table(1:dlen,1:n_airfoils) )
	1833
	1834	DO jj = 1, dlen + 1
	1835	BACKSPACE ( 90, IOSTAT=ierrn )
	1836	ENDDO
	1837
	1838	DO jj = 1, dlen
	1839	READ ( 90, * ) read_cl_cd
	1840	alpha_attack_tab(jj) = read_cl_cd(1)
	1841	DO ii = 1, n_airfoils
	1842	turb_cl_table(jj,ii) = read_cl_cd(ii * 2)
	1843	turb_cd_table(jj,ii) = read_cl_cd(ii * 2 + 1)
[1839]	1844	ENDDO
[1864]	1845
[4497]	1846	ENDDO
[1864]	1847
[4497]	1848	dlenbl = dlen
[1819]	1849
[4497]	1850	CLOSE ( 90 )
	1851
[1864]	1852	!
[4497]	1853	!-- For each possible radial position (resolution: 0.1 m --> 631 values if rotor_radius(1)=63m)
	1854	!-- and each possible angle of attack (resolution: 0.1 degrees --> 3601 values!) determine the
	1855	!-- lift and drag coefficient by interpolating between the tabulated values of each table
	1856	!-- (interpolate to current angle of attack) and between the tables (interpolate to current
	1857	!-- radial position):
	1858	ALLOCATE( turb_cl_sel1(1:dlenbl) )
	1859	ALLOCATE( turb_cl_sel2(1:dlenbl) )
	1860	ALLOCATE( turb_cd_sel1(1:dlenbl) )
	1861	ALLOCATE( turb_cd_sel2(1:dlenbl) )
[1839]	1862
[4497]	1863	radres = INT( rotor_radius(1) * 10.0_wp ) + 1_iwp
	1864	dlenbl_int = INT( 360.0_wp / accu_cl_cd_tab ) + 1_iwp
[1819]	1865
[4497]	1866	ALLOCATE( turb_cl_tab(1:dlenbl_int,1:radres) )
	1867	ALLOCATE( turb_cd_tab(1:dlenbl_int,1:radres) )
[1839]	1868
[4497]	1869	DO iir = 1, radres ! loop over radius
[1864]	1870
[4497]	1871	cur_r = ( iir - 1_iwp ) * 0.1_wp
[2836]	1872	!
[4497]	1873	!-- Find position in table 1:
	1874	lct = MINLOC( ABS( trad1 - cur_r ) )
	1875	! lct(1) = lct(1)
[1864]	1876
[4497]	1877	IF ( ( trad1(lct(1)) - cur_r ) > 0.0 ) THEN
	1878	lct(1) = lct(1) - 1
	1879	ENDIF
[1864]	1880
[4497]	1881	trow = lct(1)
[2836]	1882	!
[4497]	1883	!-- Calculate weights for radius interpolation:
	1884	weight_a = ( trad2(trow) - cur_r ) / ( trad2(trow) - trad1(trow) )
	1885	weight_b = ( cur_r - trad1(trow) ) / ( trad2(trow) - trad1(trow) )
	1886	t1 = ttoint1(trow)
	1887	t2 = ttoint2(trow)
[1864]	1888
[4497]	1889	IF ( t1 == t2 ) THEN ! if both are the same, the weights are NaN
	1890	weight_a = 0.5_wp ! then do interpolate in between same twice
	1891	weight_b = 0.5_wp ! using 0.5 as weight
	1892	ENDIF
[2836]	1893
[4497]	1894	IF ( t1 == 0 .AND. t2 == 0 ) THEN
	1895	turb_cd_sel1 = 0.0_wp
	1896	turb_cd_sel2 = 0.0_wp
	1897	turb_cl_sel1 = 0.0_wp
	1898	turb_cl_sel2 = 0.0_wp
[2836]	1899
[4497]	1900	turb_cd_tab(1,iir) = 0.0_wp ! For -180 degrees (iialpha=1) the values
	1901	turb_cl_tab(1,iir) = 0.0_wp ! for each radius has to be set
	1902	! explicitly
	1903	ELSE
	1904	turb_cd_sel1 = turb_cd_table(:,t1)
	1905	turb_cd_sel2 = turb_cd_table(:,t2)
	1906	turb_cl_sel1 = turb_cl_table(:,t1)
	1907	turb_cl_sel2 = turb_cl_table(:,t2)
[2836]	1908	!
[4497]	1909	!-- For -180 degrees (iialpha=1) the values for each radius has to be set explicitly:
	1910	turb_cd_tab(1,iir) = ( weight_a * turb_cd_table(1,t1) + weight_b * turb_cd_table(1,t2) )
	1911	turb_cl_tab(1,iir) = ( weight_a * turb_cl_table(1,t1) + weight_b * turb_cl_table(1,t2) )
	1912	ENDIF
[2836]	1913
[4497]	1914	DO iialpha = 2, dlenbl_int ! loop over angles
[1819]	1915
[4497]	1916	alpha_attack_i = -180.0_wp + REAL( iialpha-1 ) * accu_cl_cd_tab
	1917	ialpha = 1
	1918
	1919	DO WHILE ( ( alpha_attack_i > alpha_attack_tab(ialpha) ) .AND. ( ialpha < dlen ) )
	1920	ialpha = ialpha + 1
	1921	ENDDO
	1922
[1864]	1923	!
[4497]	1924	!-- Interpolation of lift and drag coefficiencts on fine grid of radius segments and angles
	1925	!-- of attack:
	1926	turb_cl_tab(iialpha,iir) = ( alpha_attack_tab(ialpha) - alpha_attack_i ) / &
	1927	( alpha_attack_tab(ialpha) - alpha_attack_tab(ialpha-1) ) * &
	1928	( weight_a * turb_cl_sel1(ialpha-1) + &
	1929	weight_b * turb_cl_sel2(ialpha-1) ) + &
	1930	( alpha_attack_i - alpha_attack_tab(ialpha-1) ) / &
	1931	( alpha_attack_tab(ialpha) - alpha_attack_tab(ialpha-1) ) * &
	1932	( weight_a * turb_cl_sel1(ialpha) + &
	1933	weight_b * turb_cl_sel2(ialpha) )
	1934	turb_cd_tab(iialpha,iir) = ( alpha_attack_tab(ialpha) - alpha_attack_i ) / &
	1935	( alpha_attack_tab(ialpha) - alpha_attack_tab(ialpha-1) ) * &
	1936	( weight_a * turb_cd_sel1(ialpha-1) + &
	1937	weight_b * turb_cd_sel2(ialpha-1) ) + &
	1938	( alpha_attack_i - alpha_attack_tab(ialpha-1) ) / &
	1939	( alpha_attack_tab(ialpha) - alpha_attack_tab(ialpha-1) ) * &
	1940	( weight_a * turb_cd_sel1(ialpha) + &
	1941	weight_b * turb_cd_sel2(ialpha) )
[3182]	1942
[4497]	1943	ENDDO ! end loop over angles of attack
[1819]	1944
[4497]	1945	ENDDO ! end loop over radius
[2836]	1946
[1819]	1947
[4497]	1948	END SUBROUTINE wtm_read_blade_tables
[1819]	1949
[4497]	1950
	1951	!--------------------------------------------------------------------------------------------------!
[1864]	1952	! Description:
	1953	! ------------
[4497]	1954	!> The projection matrix for the coordinate system of therotor disc in respect to the yaw and tilt
	1955	!> angle of the rotor is calculated
	1956	!--------------------------------------------------------------------------------------------------!
	1957	SUBROUTINE wtm_rotate_rotor( inot )
[1819]	1958
[1864]	1959
[4497]	1960	IMPLICIT NONE
[1864]	1961
[4497]	1962	INTEGER(iwp) :: inot
[1864]	1963	!
[4497]	1964	!-- Calculation of the rotation matrix for the application of the tilt to the rotors:
	1965	rot_eigen_rad(1) = SIN( yaw_angle(inot) ) ! x-component of the radial eigenvector
	1966	rot_eigen_rad(2) = COS( yaw_angle(inot) ) ! y-component of the radial eigenvector
	1967	rot_eigen_rad(3) = 0.0_wp ! z-component of the radial eigenvector
[1864]	1968
[4497]	1969	rot_eigen_azi(1) = 0.0_wp ! x-component of the azimuth eigenvector
	1970	rot_eigen_azi(2) = 0.0_wp ! y-component of the azimuth eigenvector
	1971	rot_eigen_azi(3) = 1.0_wp ! z-component of the azimuth eigenvector
[1864]	1972
[4497]	1973	rot_eigen_nor(1) = COS( yaw_angle(inot) ) ! x-component of the normal eigenvector
	1974	rot_eigen_nor(2) = -SIN( yaw_angle(inot) ) ! y-component of the normal eigenvector
	1975	rot_eigen_nor(3) = 0.0_wp ! z-component of the normal eigenvector
	1976
[1864]	1977	!
[4497]	1978	!-- Calculation of the coordinate transformation matrix to apply a tilt to the rotor.
	1979	!-- If tilt = 0, rot_coord_trans is a unit matrix.
	1980	rot_coord_trans(inot,1,1) = rot_eigen_rad(1)*2 &
	1981	( 1.0_wp - COS( tilt_angle ) ) + COS( tilt_angle )
	1982	rot_coord_trans(inot,1,2) = rot_eigen_rad(1) * rot_eigen_rad(2) * &
	1983	( 1.0_wp - COS( tilt_angle ) ) - &
	1984	rot_eigen_rad(3) * SIN( tilt_angle )
	1985	rot_coord_trans(inot,1,3) = rot_eigen_rad(1) * rot_eigen_rad(3) * &
	1986	( 1.0_wp - COS( tilt_angle ) ) + &
	1987	rot_eigen_rad(2) * SIN( tilt_angle )
	1988	rot_coord_trans(inot,2,1) = rot_eigen_rad(2) * rot_eigen_rad(1) * &
	1989	( 1.0_wp - COS( tilt_angle ) ) + &
	1990	rot_eigen_rad(3) * SIN( tilt_angle )
	1991	rot_coord_trans(inot,2,2) = rot_eigen_rad(2)*2 &
	1992	( 1.0_wp - COS( tilt_angle ) ) + COS( tilt_angle )
	1993	rot_coord_trans(inot,2,3) = rot_eigen_rad(2) * rot_eigen_rad(3) * &
	1994	( 1.0_wp - COS( tilt_angle ) ) - &
	1995	rot_eigen_rad(1) * SIN( tilt_angle )
	1996	rot_coord_trans(inot,3,1) = rot_eigen_rad(3) * rot_eigen_rad(1) * &
	1997	( 1.0_wp - COS( tilt_angle ) ) - &
	1998	rot_eigen_rad(2) * SIN( tilt_angle )
	1999	rot_coord_trans(inot,3,2) = rot_eigen_rad(3) * rot_eigen_rad(2) * &
	2000	( 1.0_wp - COS( tilt_angle ) ) + &
	2001	rot_eigen_rad(1) * SIN( tilt_angle )
	2002	rot_coord_trans(inot,3,3) = rot_eigen_rad(3)*2 &
	2003	( 1.0_wp - COS( tilt_angle ) ) + COS( tilt_angle )
[1819]	2004
[1864]	2005	!
[4497]	2006	!-- Vectors for the Transformation of forces from the rotor's spheric coordinate system to the
	2007	!-- cartesian coordinate system:
	2008	rotx(inot,:) = MATMUL( rot_coord_trans(inot,:,:), rot_eigen_nor )
	2009	roty(inot,:) = MATMUL( rot_coord_trans(inot,:,:), rot_eigen_rad )
	2010	rotz(inot,:) = MATMUL( rot_coord_trans(inot,:,:), rot_eigen_azi )
[1839]	2011
[4497]	2012	END SUBROUTINE wtm_rotate_rotor
[1839]	2013
[4497]	2014
	2015	!--------------------------------------------------------------------------------------------------!
[1819]	2016	! Description:
	2017	! ------------
[1839]	2018	!> Calculation of the forces generated by the wind turbine
[4497]	2019	!--------------------------------------------------------------------------------------------------!
	2020	SUBROUTINE wtm_forces
[1819]	2021
[1864]	2022
[4497]	2023	IMPLICIT NONE
[1819]	2024
	2025
[4497]	2026	INTEGER(iwp) :: i, j, k !< loop indices
	2027	INTEGER(iwp) :: ii, jj, kk !<
	2028	INTEGER(iwp) :: inot !< turbine loop index (turbine id)
	2029	INTEGER(iwp) :: iialpha, iir !<
	2030	INTEGER(iwp) :: rseg !<
	2031	INTEGER(iwp) :: ring !<
[4467]	2032
[4497]	2033	REAL(wp) :: flag !< flag to mask topography grid points
	2034	REAL(wp) :: sin_rot, cos_rot !<
	2035	REAL(wp) :: sin_yaw, cos_yaw !<
[4467]	2036
[4497]	2037	REAL(wp) :: aa, bb, cc, dd !< interpolation distances
	2038	REAL(wp) :: gg !< interpolation volume var
[4467]	2039
[4497]	2040	REAL(wp) :: dist_u_3d, dist_v_3d, dist_w_3d !< smearing distances
	2041
	2042
[1839]	2043	!
[4497]	2044	!-- Variables for pitch control:
	2045	INTEGER(iwp), DIMENSION(1) :: lct = 0
[1839]	2046
[4497]	2047	LOGICAL :: pitch_sw = .FALSE.
[1819]	2048
[4497]	2049	REAL(wp), DIMENSION(1) :: rad_d = 0.0_wp
[1819]	2050
[4497]	2051	REAL(wp) :: tl_factor !< factor for tip loss correction
[1819]	2052
	2053
[4497]	2054	CALL cpu_log( log_point_s(61), 'wtm_forces', 'start' )
[1819]	2055
[4497]	2056
	2057	IF ( time_since_reference_point >= time_turbine_on ) THEN
	2058
[1864]	2059	!
[4497]	2060	!-- Set forces to zero for each new time step:
	2061	thrust(:,:,:) = 0.0_wp
	2062	torque_y(:,:,:) = 0.0_wp
	2063	torque_z(:,:,:) = 0.0_wp
	2064	torque_total(:) = 0.0_wp
	2065	rot_tend_x(:,:,:) = 0.0_wp
	2066	rot_tend_y(:,:,:) = 0.0_wp
	2067	rot_tend_z(:,:,:) = 0.0_wp
	2068	thrust_rotor(:) = 0.0_wp
[1819]	2069	!
[4497]	2070	!-- Loop over number of turbines:
	2071	DO inot = 1, n_turbines
[1819]	2072
[4497]	2073	cos_yaw = COS(yaw_angle(inot))
	2074	sin_yaw = SIN(yaw_angle(inot))
[1819]	2075	!
[4497]	2076	!-- Loop over rings of each turbine:
	2077	!$OMP PARALLEL PRIVATE (ring, rseg, thrust_seg, torque_seg_y, torque_seg_z, sin_rot, &
	2078	!$OMP& cos_rot, re, rbx, rby, rbz, ii, jj, kk, aa, bb, cc, dd, gg)
	2079	!$OMP DO
	2080	DO ring = 1, nrings(inot)
[3832]	2081
[4497]	2082	thrust_seg(:) = 0.0_wp
	2083	torque_seg_y(:) = 0.0_wp
	2084	torque_seg_z(:) = 0.0_wp
[1819]	2085	!
[4497]	2086	!-- Determine distance between each ring (center) and the hub:
	2087	cur_r = (ring - 0.5_wp) * delta_r(inot)
[1819]	2088
	2089	!
[4497]	2090	!-- Loop over segments of each ring of each turbine:
	2091	DO rseg = 1, nsegs(ring,inot)
[1819]	2092	!
[4497]	2093	!-- !----------------------------------------------------------------------------------!
	2094	!-- !-- Determine coordinates of the ring segments --!
	2095	!-- !----------------------------------------------------------------------------------!
[1819]	2096	!
[4497]	2097	!-- Determine angle of ring segment towards zero degree angle of rotor system
	2098	!-- (at zero degree rotor direction vectors aligned with y-axis):
	2099	phi_rotor = rseg * 2.0_wp * pi / nsegs(ring,inot)
	2100	cos_rot = COS( phi_rotor )
	2101	sin_rot = SIN( phi_rotor )
[1819]	2102
[4497]	2103	!-- Now the direction vectors can be determined with respect to the yaw and tilt angle:
	2104	re(1) = cos_rot * sin_yaw
	2105	re(2) = cos_rot * cos_yaw
	2106	re(3) = sin_rot
[1819]	2107
[4497]	2108	rote = MATMUL( rot_coord_trans(inot,:,:), re )
[1819]	2109	!
[4497]	2110	!-- Coordinates of the single segments (center points):
	2111	rbx(ring,rseg) = hub_x(inot) + cur_r * rote(1)
	2112	rby(ring,rseg) = hub_y(inot) + cur_r * rote(2)
	2113	rbz(ring,rseg) = hub_z(inot) + cur_r * rote(3)
[1819]	2114
[4497]	2115	!-- !----------------------------------------------------------------------------------!
	2116	!-- !-- Interpolation of the velocity components from the cartesian grid point to --!
	2117	!-- !-- the coordinates of each ring segment (follows a method used in the --!
	2118	!-- !-- particle model) --!
	2119	!-- !----------------------------------------------------------------------------------!
[1819]	2120
[4497]	2121	u_int(inot,ring,rseg) = 0.0_wp
	2122	u_int_1_l(inot,ring,rseg) = 0.0_wp
[1819]	2123
[4497]	2124	v_int(inot,ring,rseg) = 0.0_wp
	2125	v_int_1_l(inot,ring,rseg) = 0.0_wp
[1819]	2126
[4497]	2127	w_int(inot,ring,rseg) = 0.0_wp
	2128	w_int_1_l(inot,ring,rseg) = 0.0_wp
[1819]	2129
	2130	!
[4497]	2131	!-- Interpolation of the u-component:
	2132	ii = rbx(ring,rseg) * ddx
	2133	jj = ( rby(ring,rseg) - 0.5_wp * dy ) * ddy
	2134	kk = ( rbz(ring,rseg) + 0.5_wp * dz(1) ) / dz(1)
[1819]	2135	!
[4497]	2136	!-- Interpolate only if all required information is available on the current PE:
	2137	IF ( ( ii >= nxl ) .AND. ( ii <= nxr ) ) THEN
	2138	IF ( ( jj >= nys ) .AND. ( jj <= nyn ) ) THEN
[1819]	2139
[4497]	2140	aa = ( ( ii + 1 ) * dx - rbx(ring,rseg) ) * &
	2141	( ( jj + 1 + 0.5_wp ) * dy - rby(ring,rseg) )
	2142	bb = ( rbx(ring,rseg) - ii * dx ) * &
	2143	( ( jj + 1 + 0.5_wp ) * dy - rby(ring,rseg) )
	2144	cc = ( ( ii+1 ) * dx - rbx(ring,rseg) ) * &
	2145	( rby(ring,rseg) - ( jj + 0.5_wp ) * dy )
	2146	dd = ( rbx(ring,rseg) - ii * dx ) * &
	2147	( rby(ring,rseg) - ( jj + 0.5_wp ) * dy )
	2148	gg = dx * dy
[1819]	2149
[4497]	2150	u_int_l = ( aa * u(kk,jj,ii) + bb * u(kk,jj,ii+1) + cc * u(kk,jj+1,ii) &
	2151	+ dd * u(kk,jj+1,ii+1) ) / gg
[1819]	2152
[4497]	2153	u_int_u = ( aa * u(kk+1,jj,ii) + bb * u(kk+1,jj,ii+1) + cc * u(kk+1,jj+1,ii) &
	2154	+ dd * u(kk+1,jj+1,ii+1) ) / gg
[1819]	2155
[4497]	2156	u_int_1_l(inot,ring,rseg) = u_int_l + ( rbz(ring,rseg) - zu(kk) ) / dz(1) * &
	2157	( u_int_u - u_int_l )
[1819]	2158
	2159	ELSE
	2160	u_int_1_l(inot,ring,rseg) = 0.0_wp
	2161	ENDIF
	2162
[4497]	2163	ELSE
	2164	u_int_1_l(inot,ring,rseg) = 0.0_wp
	2165	ENDIF
[1819]	2166
[4497]	2167
[1819]	2168	!
[4497]	2169	!-- Interpolation of the v-component:
	2170	ii = ( rbx(ring,rseg) - 0.5_wp * dx ) * ddx
	2171	jj = rby(ring,rseg) * ddy
	2172	kk = ( rbz(ring,rseg) + 0.5_wp * dz(1) ) / dz(1)
[1819]	2173	!
[4497]	2174	!-- Interpolate only if all required information is available on the current PE:
	2175	IF ( ( ii >= nxl ) .AND. ( ii <= nxr ) ) THEN
	2176	IF ( ( jj >= nys ) .AND. ( jj <= nyn ) ) THEN
[1819]	2177
[4497]	2178	aa = ( ( ii + 1 + 0.5_wp ) * dx - rbx(ring,rseg) ) * &
	2179	( ( jj + 1 ) * dy - rby(ring,rseg) )
	2180	bb = ( rbx(ring,rseg) - ( ii + 0.5_wp ) * dx ) * &
	2181	( ( jj + 1 ) * dy - rby(ring,rseg) )
	2182	cc = ( ( ii + 1 + 0.5_wp ) * dx - rbx(ring,rseg) ) * &
	2183	( rby(ring,rseg) - jj * dy )
	2184	dd = ( rbx(ring,rseg) - ( ii + 0.5_wp ) * dx ) * &
	2185	( rby(ring,rseg) - jj * dy )
	2186	gg = dx * dy
[1819]	2187
[4497]	2188	v_int_l = ( aa * v(kk,jj,ii) + bb * v(kk,jj,ii+1) + cc * v(kk,jj+1,ii) &
	2189	+ dd * v(kk,jj+1,ii+1) ) / gg
[1819]	2190
[4497]	2191	v_int_u = ( aa * v(kk+1,jj,ii) + bb * v(kk+1,jj,ii+1) + cc * v(kk+1,jj+1,ii) &
	2192	+ dd * v(kk+1,jj+1,ii+1) ) / gg
[1819]	2193
[4497]	2194	v_int_1_l(inot,ring,rseg) = v_int_l + ( rbz(ring,rseg) - zu(kk) ) / dz(1) * &
	2195	( v_int_u - v_int_l )
[1819]	2196
	2197	ELSE
	2198	v_int_1_l(inot,ring,rseg) = 0.0_wp
	2199	ENDIF
	2200
[4497]	2201	ELSE
	2202	v_int_1_l(inot,ring,rseg) = 0.0_wp
	2203	ENDIF
[1819]	2204
[4497]	2205
[1819]	2206	!
[4497]	2207	!-- Interpolation of the w-component:
	2208	ii = ( rbx(ring,rseg) - 0.5_wp * dx ) * ddx
	2209	jj = ( rby(ring,rseg) - 0.5_wp * dy ) * ddy
	2210	kk = rbz(ring,rseg) / dz(1)
[1819]	2211	!
[4497]	2212	!-- Interpolate only if all required information is available on the current PE:
	2213	IF ( ( ii >= nxl ) .AND. ( ii <= nxr ) ) THEN
	2214	IF ( ( jj >= nys ) .AND. ( jj <= nyn ) ) THEN
[1819]	2215
[4497]	2216	aa = ( ( ii + 1 + 0.5_wp ) * dx - rbx(ring,rseg) ) * &
	2217	( ( jj + 1 + 0.5_wp ) * dy - rby(ring,rseg) )
	2218	bb = ( rbx(ring,rseg) - ( ii + 0.5_wp ) * dx ) * &
	2219	( ( jj + 1 + 0.5_wp ) * dy - rby(ring,rseg) )
	2220	cc = ( ( ii + 1 + 0.5_wp ) * dx - rbx(ring,rseg) ) * &
	2221	( rby(ring,rseg) - ( jj + 0.5_wp ) * dy )
	2222	dd = ( rbx(ring,rseg) - ( ii + 0.5_wp ) * dx ) * &
	2223	( rby(ring,rseg) - ( jj + 0.5_wp ) * dy )
	2224	gg = dx * dy
[1819]	2225
[4497]	2226	w_int_l = ( aa * w(kk,jj,ii) + bb * w(kk,jj,ii+1) + cc * w(kk,jj+1,ii) &
	2227	+ dd * w(kk,jj+1,ii+1) ) / gg
[1819]	2228
[4497]	2229	w_int_u = ( aa * w(kk+1,jj,ii) + bb * w(kk+1,jj,ii+1) + cc * w(kk+1,jj+1,ii) &
	2230	+ dd * w(kk+1,jj+1,ii+1) ) / gg
[1819]	2231
[4497]	2232	w_int_1_l(inot,ring,rseg) = w_int_l + ( rbz(ring,rseg) - zw(kk) ) / dz(1) * &
	2233	( w_int_u - w_int_l )
[1819]	2234	ELSE
	2235	w_int_1_l(inot,ring,rseg) = 0.0_wp
	2236	ENDIF
	2237
[4497]	2238	ELSE
	2239	w_int_1_l(inot,ring,rseg) = 0.0_wp
	2240	ENDIF
	2241
[1819]	2242	ENDDO
	2243
	2244	ENDDO
[4497]	2245	!$OMP END PARALLEL
[1819]	2246
[4497]	2247	ENDDO
	2248
[1819]	2249	!
[4497]	2250	!-- Exchange between PEs (information required on each PE):
[1819]	2251	#if defined( __parallel )
[4497]	2252	CALL MPI_ALLREDUCE( u_int_1_l, u_int, n_turbines * MAXVAL(nrings) * &
	2253	MAXVAL(nsegs), MPI_REAL, MPI_SUM, comm2d, ierr )
	2254	CALL MPI_ALLREDUCE( v_int_1_l, v_int, n_turbines * MAXVAL(nrings) * &
	2255	MAXVAL(nsegs), MPI_REAL, MPI_SUM, comm2d, ierr )
	2256	CALL MPI_ALLREDUCE( w_int_1_l, w_int, n_turbines * MAXVAL(nrings) * &
	2257	MAXVAL(nsegs), MPI_REAL, MPI_SUM, comm2d, ierr )
[1819]	2258	#else
[4497]	2259	u_int = u_int_1_l
	2260	v_int = v_int_1_l
	2261	w_int = w_int_1_l
[1819]	2262	#endif
	2263
	2264
	2265	!
[4497]	2266	!-- Loop over number of turbines:
	2267	DO inot = 1, n_turbines
[1912]	2268	pit_loop: DO
[1819]	2269
[4497]	2270	IF ( pitch_sw ) THEN
	2271	torque_total(inot) = 0.0_wp
	2272	thrust_rotor(inot) = 0.0_wp
	2273	pitch_angle(inot) = pitch_angle(inot) + 0.25_wp
	2274	! IF ( myid == 0 ) PRINT*, 'Pitch', inot, pitch_angle(inot)
	2275	ELSE
	2276	cos_yaw = COS( yaw_angle(inot) )
	2277	sin_yaw = SIN( yaw_angle(inot) )
	2278	IF ( pitch_control ) THEN
	2279	pitch_angle(inot) = MAX( pitch_angle_old(inot) - pitch_rate * dt_3d , 0.0_wp )
[1819]	2280	ENDIF
[4497]	2281	ENDIF
[1819]	2282
[1839]	2283	!
[4497]	2284	!-- Loop over rings of each turbine:
	2285	!$OMP PARALLEL PRIVATE (ring, rseg, sin_rot, cos_rot, re, rea, ren, rote, rota, rotn, &
	2286	!$OMP& vtheta, phi_rel, lct, rad_d, alpha_attack, vrel, &
	2287	!$OMP& chord, iialpha, iir, turb_cl, tl_factor, thrust_seg, &
	2288	!$OMP& torque_seg_y, turb_cd, torque_seg_z, thrust_ring, &
	2289	!$OMP& torque_ring_y, torque_ring_z)
	2290	!$OMP DO
	2291	DO ring = 1, nrings(inot)
[1819]	2292	!
[4497]	2293	!-- Determine distance between each ring (center) and the hub:
	2294	cur_r = ( ring - 0.5_wp ) * delta_r(inot)
[1839]	2295	!
[4497]	2296	!-- Loop over segments of each ring of each turbine:
	2297	DO rseg = 1, nsegs(ring,inot)
[1819]	2298	!
[4497]	2299	!-- Determine angle of ring segment towards zero degree angle of rotor system
	2300	!-- (at zero degree rotor direction vectors aligned with y-axis):
	2301	phi_rotor = rseg * 2.0_wp * pi / nsegs(ring,inot)
	2302	cos_rot = COS( phi_rotor )
	2303	sin_rot = SIN( phi_rotor )
[1819]	2304	!
[4497]	2305	!-- Now the direction vectors can be determined with respect to the yaw and tilt angle:
	2306	re(1) = cos_rot * sin_yaw
	2307	re(2) = cos_rot * cos_yaw
	2308	re(3) = sin_rot
[1819]	2309
[4497]	2310	! The current unit vector in azimuthal direction:
	2311	rea(1) = - sin_rot * sin_yaw
	2312	rea(2) = - sin_rot * cos_yaw
	2313	rea(3) = cos_rot
[1819]	2314
	2315	!
[4497]	2316	!-- To respect the yawing angle for the calculations of velocities and forces the
	2317	!-- unit vectors perpendicular to the rotor area in direction of the positive yaw
	2318	!-- angle are defined:
	2319	ren(1) = cos_yaw
	2320	ren(2) = - sin_yaw
	2321	ren(3) = 0.0_wp
[1819]	2322	!
[4497]	2323	!-- Multiplication with the coordinate transformation matrix gives the final unit
	2324	!-- vector with consideration of the rotor tilt:
	2325	rote = MATMUL( rot_coord_trans(inot,:,:), re )
	2326	rota = MATMUL( rot_coord_trans(inot,:,:), rea )
	2327	rotn = MATMUL( rot_coord_trans(inot,:,:), ren )
[1819]	2328	!
[4497]	2329	!-- Coordinates of the single segments (center points):
	2330	rbx(ring,rseg) = hub_x(inot) + cur_r * rote(1)
[1819]	2331
[4497]	2332	rby(ring,rseg) = hub_y(inot) + cur_r * rote(2)
[1819]	2333
[4497]	2334	rbz(ring,rseg) = hub_z(inot) + cur_r * rote(3)
[1819]	2335
	2336	!
[4497]	2337	!-- !----------------------------------------------------------------------------------!
	2338	!-- !-- Calculation of various angles and relative velocities --!
	2339	!-- !----------------------------------------------------------------------------------!
[1819]	2340	!
[4497]	2341	!-- In the following the 3D-velocity field is projected its components perpendicular
	2342	!-- and parallel to the rotor area.
	2343	!-- The calculation of forces will be done in the rotor-coordinates y' and z.
	2344	!-- The yaw angle will be reintroduced when the force is applied on the hydrodynamic
	2345	!-- equations.
[1864]	2346	!
[4497]	2347	!-- Projection of the xy-velocities relative to the rotor area:
[1864]	2348	!
[4497]	2349	!-- Velocity perpendicular to the rotor area:
	2350	u_rot = u_int(inot,ring,rseg) * rotn(1) + v_int(inot,ring,rseg)*rotn(2) + &
	2351	w_int(inot,ring,rseg)*rotn(3)
[1819]	2352	!
[4497]	2353
	2354	!-- Projection of the 3D-velocity vector in the azimuthal direction:
	2355	vtheta(rseg) = rota(1) * u_int(inot,ring,rseg) + rota(2) * v_int(inot,ring,rseg) + &
	2356	rota(3) * w_int(inot,ring,rseg)
[1819]	2357	!
	2358
[4497]	2359	!-- Determination of the angle phi_rel between the rotor plane and the direction of the
	2360	!-- flow relative to the rotor:
	2361	phi_rel(rseg) = ATAN2( u_rot , ( rotor_speed(inot) * cur_r - vtheta(rseg) ) )
[1819]	2362
	2363	!
[4497]	2364	!-- Interpolation of the local pitch angle from tabulated values to the current
	2365	!-- radial position:
	2366	lct = minloc( ABS( cur_r-lrd ) )
	2367	rad_d = cur_r-lrd(lct)
[1819]	2368
[4497]	2369	IF ( cur_r == 0.0_wp ) THEN
	2370	alpha_attack(rseg) = 0.0_wp
[1819]	2371
[4497]	2372	ELSE IF ( cur_r >= lrd(size(ard)) ) THEN
	2373	alpha_attack(rseg) = ( ard(size(ard) ) + ard(size(ard) -1 ) ) / 2.0_wp
	2374
	2375	ELSE
	2376	alpha_attack(rseg) = ( ard( lct(1) ) * ( ( lrd( lct(1) + 1 ) - cur_r ) / &
	2377	( lrd( lct(1) + 1 ) - lrd( lct(1) ) ) ) ) + &
	2378	( ard( lct(1) + 1 ) * ( ( cur_r - lrd( lct(1) ) ) / &
	2379	( lrd( lct(1) + 1 ) - lrd( lct(1) ) ) ) )
	2380	ENDIF
	2381
[1819]	2382	!
[4497]	2383	!-- In Fortran radian instead of degree is used as unit for all angles.
	2384	!-- Therefore, a transformation from angles given in degree to angles given in radian
	2385	!-- is necessary here:
	2386	alpha_attack(rseg) = alpha_attack(rseg) * ( ( 2.0_wp * pi ) / 360.0_wp )
[1819]	2387	!
[4497]	2388	!-- Substraction of the local pitch angle to obtain the local angle of attack:
	2389	alpha_attack(rseg) = phi_rel(rseg) - alpha_attack(rseg)
[1819]	2390	!
[4497]	2391	!-- Preliminary transformation back from angles given in radian to angles given in
	2392	!-- degree:
	2393	alpha_attack(rseg) = alpha_attack(rseg) * ( 360.0_wp / ( 2.0_wp * pi ) )
[1819]	2394	!
[4497]	2395	!-- Correct with collective pitch angle:
	2396	alpha_attack(rseg) = alpha_attack(rseg) - pitch_angle(inot)
[1819]	2397
	2398	!
[4497]	2399	!-- Determination of the magnitude of the flow velocity relative to the rotor:
	2400	vrel(rseg) = SQRT( u_rot*2 + ( rotor_speed(inot) cur_r - vtheta(rseg) )**2 )
[1819]	2401
	2402	!
[4497]	2403	!-- !----------------------------------------------------------------------------------!
	2404	!-- !-- Interpolation of chord as well as lift and drag --!
	2405	!-- !-- coefficients from tabulated values --!
	2406	!-- !----------------------------------------------------------------------------------!
[1819]	2407
	2408	!
[4497]	2409	!-- Interpolation of the chord_length from tabulated values to the current radial
	2410	!-- position:
	2411	IF ( cur_r == 0.0_wp ) THEN
	2412	chord(rseg) = 0.0_wp
[1819]	2413
[4497]	2414	ELSE IF ( cur_r >= lrd( size(crd) ) ) THEN
	2415	chord(rseg) = ( crd( size(crd) ) + ard( size(crd) - 1 ) ) / 2.0_wp
[1819]	2416
[4497]	2417	ELSE
	2418	chord(rseg) = ( crd( lct(1) ) * ( ( lrd( lct(1) + 1 ) - cur_r ) / &
	2419	( lrd( lct(1) + 1 ) - lrd( lct(1) ) ) ) ) + ( crd( lct(1) + 1 ) &
	2420	* ( ( cur_r - lrd( lct(1) ) ) / ( lrd( lct(1) + 1 ) - &
	2421	lrd( lct(1) ) ) ) )
	2422	ENDIF
	2423
[1819]	2424	!
[4497]	2425	!-- Determine index of current angle of attack, needed for finding the appropriate
	2426	!-- interpolated values of the lift and drag coefficients
	2427	!-- (-180.0 degrees = 1, +180.0 degrees = 3601, so one index every 0.1 degrees):
	2428	iialpha = CEILING( ( alpha_attack(rseg) + 180.0_wp ) &
	2429	* ( 1.0_wp / accu_cl_cd_tab ) ) + 1.0_wp
[1819]	2430	!
[4497]	2431	!-- Determine index of current radial position, needed for finding the appropriate
	2432	!-- interpolated values of the lift and drag coefficients (one index every 0.1 m):
	2433	iir = CEILING( cur_r * 10.0_wp )
[1819]	2434	!
[4497]	2435	!-- Read in interpolated values of the lift and drag coefficients for the current
	2436	!-- radial position and angle of attack:
	2437	turb_cl(rseg) = turb_cl_tab(iialpha,iir)
	2438	turb_cd(rseg) = turb_cd_tab(iialpha,iir)
[1819]	2439
	2440	!
[4497]	2441	!-- Final transformation back from angles given in degree to angles given in radian:
	2442	alpha_attack(rseg) = alpha_attack(rseg) * ( ( 2.0_wp * pi ) / 360.0_wp )
[1819]	2443
[4497]	2444	IF ( tip_loss_correction ) THEN
[4465]	2445	!
[4497]	2446	!-- Tip loss correction following Schito.
	2447	!-- Schito applies the tip loss correction only to the lift force.
	2448	!-- Therefore, the tip loss correction is only applied to the lift coefficient and
	2449	!-- not to the drag coefficient in our case.
	2450	IF ( phi_rel(rseg) == 0.0_wp ) THEN
	2451	tl_factor = 1.0_wp
[4465]	2452
[4497]	2453	ELSE
	2454	tl_factor = ( 2.0 / pi ) * &
	2455	ACOS( EXP( -1.0 * ( 3.0 * ( rotor_radius(inot) - cur_r ) / &
	2456	( 2.0 * cur_r * ABS( SIN( phi_rel(rseg) ) ) ) ) ) )
	2457	ENDIF
[4465]	2458
[4497]	2459	turb_cl(rseg) = tl_factor * turb_cl(rseg)
	2460
	2461	ENDIF
[1819]	2462	!
[4497]	2463	!-- !----------------------------------------------------------------------------------!
	2464	!-- !-- Calculation of the forces --!
	2465	!-- !----------------------------------------------------------------------------------!
[1819]	2466
	2467	!
[4497]	2468	!-- Calculate the pre_factor for the thrust and torque forces:
	2469	pre_factor = 0.5_wp * ( vrel(rseg)*2 ) 3.0_wp * chord(rseg) * delta_r(inot) &
	2470	/ nsegs(ring,inot)
[1819]	2471
	2472	!
[4497]	2473	!-- Calculate the thrust force (x-component of the total force) for each ring segment:
	2474	thrust_seg(rseg) = pre_factor * ( turb_cl(rseg) * COS (phi_rel(rseg) ) + &
	2475	turb_cd(rseg) * SIN( phi_rel(rseg) ) )
[1819]	2476
	2477	!
[4497]	2478	!-- Determination of the second of the additional forces acting on the flow in the
	2479	!-- azimuthal direction: force vector as basis for torque (torque itself would be the
	2480	!-- vector product of the radius vector and the force vector):
	2481	torque_seg = pre_factor * ( turb_cl(rseg) * SIN (phi_rel(rseg) ) - &
	2482	turb_cd(rseg) * COS( phi_rel(rseg) ) )
[1819]	2483	!
[4497]	2484	!-- Decomposition of the force vector into two parts: One acting along the
	2485	!-- y-direction and one acting along the z-direction of the rotor coordinate system:
	2486	torque_seg_y(rseg) = -torque_seg * sin_rot
	2487	torque_seg_z(rseg) = torque_seg * cos_rot
[1819]	2488
[1912]	2489	!
[4497]	2490	!-- Add the segment thrust to the thrust of the whole rotor:
	2491	!$OMP CRITICAL
	2492	thrust_rotor(inot) = thrust_rotor(inot) + thrust_seg(rseg)
[1912]	2493
[4465]	2494
[4497]	2495	torque_total(inot) = torque_total(inot) + (torque_seg * cur_r)
	2496	!$OMP END CRITICAL
[1819]	2497
[4497]	2498	ENDDO !-- end of loop over ring segments
[1819]	2499
	2500	!
[4497]	2501	!-- Restore the forces into arrays containing all the segments of each ring:
	2502	thrust_ring(ring,:) = thrust_seg(:)
	2503	torque_ring_y(ring,:) = torque_seg_y(:)
	2504	torque_ring_z(ring,:) = torque_seg_z(:)
[1819]	2505
	2506
[4497]	2507	ENDDO !-- end of loop over rings
	2508	!$OMP END PARALLEL
[1819]	2509
	2510
[4497]	2511	CALL cpu_log( log_point_s(62), 'wtm_controller', 'start' )
[1819]	2512
[4465]	2513
[4497]	2514	IF ( speed_control ) THEN
[1912]	2515	!
[4497]	2516	!-- Calculation of the current generator speed for rotor speed control:
[4465]	2517
[4497]	2518	!
	2519	!-- The acceleration of the rotor speed is calculated from the force balance of the
	2520	!-- accelerating torque and the torque of the rotating rotor and generator:
	2521	om_rate = ( torque_total(inot) * air_density * gear_efficiency - &
	2522	gear_ratio * torque_gen_old(inot) ) / ( rotor_inertia + &
	2523	gear_ratio * gear_ratio * generator_inertia ) * dt_3d
[1819]	2524
[1912]	2525	!
[4497]	2526	!-- The generator speed is given by the product of gear gear_ratio and rotor speed:
	2527	generator_speed(inot) = gear_ratio * ( rotor_speed(inot) + om_rate )
[4465]	2528
[4497]	2529	ENDIF
[4465]	2530
[4497]	2531	IF ( pitch_control ) THEN
[1819]	2532
[1912]	2533	!
[4497]	2534	!-- If the current generator speed is above rated, the pitch is not saturated and the
	2535	!-- change from the last time step is within the maximum pitch rate, then the pitch loop
	2536	!-- is repeated with a pitch gain:
	2537	IF ( ( generator_speed(inot) > generator_speed_rated ) .AND. &
	2538	( pitch_angle(inot) < 25.0_wp ) .AND. &
	2539	( pitch_angle(inot) < pitch_angle_old(inot) + pitch_rate * dt_3d ) ) THEN
	2540	pitch_sw = .TRUE.
[1912]	2541	!
[4497]	2542	!-- Go back to beginning of pit_loop:
	2543	CYCLE pit_loop
	2544	ENDIF
[4465]	2545
[1912]	2546	!
[4497]	2547	!-- The current pitch is saved for the next time step:
	2548	pitch_angle_old(inot) = pitch_angle(inot)
	2549	pitch_sw = .FALSE.
	2550	ENDIF
	2551	EXIT pit_loop
	2552	ENDDO pit_loop ! Recursive pitch control loop
[1819]	2553
[1864]	2554
[1819]	2555	!
[4497]	2556	!-- Call the rotor speed controller:
	2557	IF ( speed_control ) THEN
[1819]	2558	!
[4497]	2559	!-- Find processor at i_hub, j_hub:
	2560	IF ( ( nxl <= i_hub(inot) ) .AND. ( nxr >= i_hub(inot) ) ) THEN
	2561	IF ( ( nys <= j_hub(inot) ) .AND. ( nyn >= j_hub(inot) ) ) THEN
	2562	CALL wtm_speed_control( inot )
[1912]	2563	ENDIF
[1819]	2564	ENDIF
	2565
[4497]	2566	ENDIF
[1819]	2567
	2568
[4497]	2569	CALL cpu_log( log_point_s(62), 'wtm_controller', 'stop' )
[1819]	2570
[4497]	2571	CALL cpu_log( log_point_s(63), 'wtm_smearing', 'start' )
[1819]	2572
[4497]	2573
	2574	!-- !----------------------------------------------------------------------------------------!
	2575	!-- !-- Regularization kernel --!
	2576	!-- !-- Smearing of the forces and interpolation to cartesian grid --!
	2577	!-- !----------------------------------------------------------------------------------------!
[1819]	2578	!
[4497]	2579	!-- The aerodynamic blade forces need to be distributed smoothly on several mesh points in
	2580	!-- order to avoid singular behaviour.
[1819]	2581	!
[4497]	2582	!-- Summation over sum of weighted forces. The weighting factor (calculated in user_init)
	2583	!-- includes information on the distance between the center of the grid cell and the rotor
	2584	!-- segment under consideration.
[1819]	2585	!
[4497]	2586	!-- To save computing time, apply smearing only for the relevant part of the model domain:
[1819]	2587	!
	2588	!--
[4497]	2589	!-- Calculation of the boundaries:
	2590	i_smear(inot) = CEILING( ( rotor_radius(inot) * ABS( roty(inot,1) ) + eps_min ) / dx )
	2591	j_smear(inot) = CEILING( ( rotor_radius(inot) * ABS( roty(inot,2) ) + eps_min ) / dy )
[1819]	2592
[4497]	2593	!$OMP PARALLEL PRIVATE (i, j, k, ring, rseg, flag, dist_u_3d, dist_v_3d, dist_w_3d)
	2594	!$OMP DO
	2595	DO i = MAX( nxl, i_hub(inot) - i_smear(inot) ), MIN( nxr, i_hub(inot) + i_smear(inot) )
	2596	DO j = MAX( nys, j_hub(inot) - j_smear(inot) ), MIN( nyn, j_hub(inot) + j_smear(inot) )
	2597	! DO k = MAX( nzb_u_inner(j,i)+1, k_hub(inot) - k_smear(inot) ), &
	2598	! k_hub(inot) + k_smear(inot)
	2599	DO k = nzb + 1, k_hub(inot) + k_smear(inot)
	2600	DO ring = 1, nrings(inot)
	2601	DO rseg = 1, nsegs(ring,inot)
[1819]	2602	!
[4497]	2603	!-- Predetermine flag to mask topography:
	2604	flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 1 ) )
[4465]	2605
[2232]	2606	!
[4497]	2607	!-- Determine the square of the distance between the current grid point and
	2608	!-- each rotor area segment:
	2609	dist_u_3d = ( i * dx - rbx(ring,rseg) )**2 + &
	2610	( j * dy + 0.5_wp * dy - rby(ring,rseg) )**2 + &
	2611	( k * dz(1) - 0.5_wp * dz(1) - rbz(ring,rseg) )**2
[1819]	2612
[4497]	2613	dist_v_3d = ( i * dx + 0.5_wp * dx - rbx(ring,rseg) )**2 + &
	2614	( j * dy - rby(ring,rseg) )**2 + &
	2615	( k * dz(1) - 0.5_wp * dz(1) - rbz(ring,rseg) )**2
	2616
	2617	dist_w_3d = ( i * dx + 0.5_wp * dx - rbx(ring,rseg) )**2 + &
	2618	( j * dy + 0.5_wp * dy - rby(ring,rseg) )**2 + &
	2619	( k * dz(1) - rbz(ring,rseg) )**2
	2620
[1819]	2621	!
[4497]	2622	!-- 3D-smearing of the forces with a polynomial function (much faster than
	2623	!-- the old Gaussian function), using some parameters that have been
	2624	!-- calculated in user_init. The function is only similar to Gaussian
	2625	!-- function for squared distances <= eps_min2:
	2626	IF ( dist_u_3d <= eps_min2 ) THEN
	2627	thrust(k,j,i) = thrust(k,j,i) + thrust_ring(ring,rseg) * &
	2628	( ( pol_a * dist_u_3d - pol_b ) * &
	2629	dist_u_3d + 1.0_wp ) * eps_factor * flag
	2630	ENDIF
[1819]	2631
[4497]	2632	IF ( dist_v_3d <= eps_min2 ) THEN
	2633	torque_y(k,j,i) = torque_y(k,j,i) + torque_ring_y(ring,rseg) * &
	2634	( ( pol_a * dist_v_3d - pol_b ) * &
	2635	dist_v_3d + 1.0_wp ) * eps_factor * flag
	2636	ENDIF
[4465]	2637
[4497]	2638	IF ( dist_w_3d <= eps_min2 ) THEN
	2639	torque_z(k,j,i) = torque_z(k,j,i) + torque_ring_z(ring,rseg) * &
	2640	( ( pol_a * dist_w_3d - pol_b ) * &
	2641	dist_w_3d + 1.0_wp ) * eps_factor * flag
	2642	ENDIF
	2643
	2644	ENDDO ! End of loop over rseg
	2645	ENDDO ! End of loop over ring
	2646
[1819]	2647	!
[4497]	2648	!-- Rotation of force components:
	2649	rot_tend_x(k,j,i) = rot_tend_x(k,j,i) + ( thrust(k,j,i) * rotx(inot,1) + &
	2650	torque_y(k,j,i) * roty(inot,1) + torque_z(k,j,i) * &
	2651	rotz(inot,1) ) * flag
[4465]	2652
[4497]	2653	rot_tend_y(k,j,i) = rot_tend_y(k,j,i) + ( thrust(k,j,i) * rotx(inot,2) + &
	2654	torque_y(k,j,i) * roty(inot,2) + torque_z(k,j,i) * &
	2655	rotz(inot,2) ) * flag
[4465]	2656
[4497]	2657	rot_tend_z(k,j,i) = rot_tend_z(k,j,i) + ( thrust(k,j,i) * rotx(inot,3) + &
	2658	torque_y(k,j,i) * roty(inot,3) + torque_z(k,j,i) * &
	2659	rotz(inot,3) ) * flag
[1819]	2660
[4497]	2661	ENDDO ! End of loop over k
	2662	ENDDO ! End of loop over j
	2663	ENDDO ! End of loop over i
	2664	!$OMP END PARALLEL
[1819]	2665
[4497]	2666	CALL cpu_log( log_point_s(63), 'wtm_smearing', 'stop' )
[4465]	2667
[4497]	2668	ENDDO !-- end of loop over turbines
[1819]	2669
[4465]	2670
[4497]	2671	IF ( yaw_control ) THEN
[1819]	2672	!
[4497]	2673	!-- Allocate arrays for yaw control at first call. Can't be allocated before dt_3d is set.
	2674	IF ( start_up ) THEN
	2675	wdlon= MAX( 1 , NINT( 30.0_wp / dt_3d ) ) ! 30s running mean array
	2676	ALLOCATE( wd30(1:n_turbines,1:WDLON) )
	2677	wd30 = 999.0_wp ! Set to dummy value
	2678	ALLOCATE( wd30_l(1:WDLON) )
[4465]	2679
[4497]	2680	wdsho = MAX( 1 , NINT( 2.0_wp / dt_3d ) ) ! 2s running mean array
	2681	ALLOCATE( wd2(1:n_turbines,1:wdsho) )
	2682	wd2 = 999.0_wp ! Set to dummy value
	2683	ALLOCATE( wd2_l(1:wdsho) )
	2684	start_up = .FALSE.
	2685	ENDIF
[1819]	2686
	2687	!
[4497]	2688	!-- Calculate the inflow wind speed:
[1819]	2689	!--
[4497]	2690	!-- Loop over number of turbines:
	2691	DO inot = 1, n_turbines
[1819]	2692	!
[4497]	2693	!-- Find processor at i_hub, j_hub:
	2694	IF ( ( nxl <= i_hub(inot) ) .AND. ( nxr >= i_hub(inot) ) ) THEN
	2695	IF ( ( nys <= j_hub(inot) ) .AND. ( nyn >= j_hub(inot) ) ) THEN
	2696	u_inflow_l(inot) = u(k_hub(inot),j_hub(inot),i_hub(inot))
	2697	wdir_l(inot) = -1.0_wp * ATAN2( 0.5_wp * &
	2698	( v(k_hub(inot), j_hub(inot), i_hub(inot) + 1) + &
	2699	v(k_hub(inot), j_hub(inot), i_hub(inot)) ) , 0.5_wp * &
	2700	( u(k_hub(inot), j_hub(inot) + 1, i_hub(inot)) + &
	2701	u(k_hub(inot), j_hub(inot), i_hub(inot)) ) )
[1864]	2702
[4497]	2703	CALL wtm_yawcontrol( inot )
[1864]	2704
[4497]	2705	yaw_angle_l(inot) = yaw_angle(inot)
[1864]	2706
[1819]	2707	ENDIF
[4497]	2708	ENDIF
[4465]	2709
[4497]	2710	ENDDO ! end of loop over turbines
[1864]	2711
	2712	!
[4497]	2713	!-- Transfer of information to the other cpus:
	2714	#if defined( __parallel )
	2715	CALL MPI_ALLREDUCE( u_inflow_l, u_inflow, n_turbines, MPI_REAL, &
	2716	MPI_SUM, comm2d, ierr )
	2717	CALL MPI_ALLREDUCE( wdir_l, wdir, n_turbines, MPI_REAL, MPI_SUM, &
	2718	comm2d, ierr )
	2719	CALL MPI_ALLREDUCE( yaw_angle_l, yaw_angle, n_turbines, MPI_REAL, &
	2720	MPI_SUM, comm2d, ierr )
[1929]	2721	#else
[4497]	2722	u_inflow = u_inflow_l
	2723	wdir = wdir_l
	2724	yaw_angle = yaw_angle_l
[4465]	2725
[1929]	2726	#endif
[4497]	2727	DO inot = 1, n_turbines
[4465]	2728	!
[4497]	2729	!-- Update rotor orientation:
	2730	CALL wtm_rotate_rotor( inot )
[1819]	2731
[4497]	2732	ENDDO ! End of loop over turbines
[4465]	2733
[4497]	2734	ENDIF ! end of yaw control
[4465]	2735
[4497]	2736	IF ( speed_control ) THEN
[1864]	2737	!
[4497]	2738	!-- Transfer of information to the other cpus:
	2739	! CALL MPI_ALLREDUCE( generator_speed, generator_speed_old, n_turbines, &
	2740	! MPI_REAL,MPI_SUM, comm2d, ierr )
	2741	#if defined( __parallel )
	2742	CALL MPI_ALLREDUCE( torque_gen, torque_gen_old, n_turbines, &
	2743	MPI_REAL, MPI_SUM, comm2d, ierr )
	2744	CALL MPI_ALLREDUCE( rotor_speed_l, rotor_speed, n_turbines, &
	2745	MPI_REAL, MPI_SUM, comm2d, ierr )
	2746	CALL MPI_ALLREDUCE( generator_speed_f, generator_speed_f_old, n_turbines, &
	2747	MPI_REAL, MPI_SUM, comm2d, ierr )
[1929]	2748	#else
[4497]	2749	torque_gen_old = torque_gen
	2750	rotor_speed = rotor_speed_l
	2751	generator_speed_f_old = generator_speed_f
[1929]	2752	#endif
[4465]	2753
	2754	ENDIF
[1819]	2755
[4497]	2756	ENDIF
[1819]	2757
[4497]	2758	CALL cpu_log( log_point_s(61), 'wtm_forces', 'stop' )
[1819]	2759
	2760
[4497]	2761	END SUBROUTINE wtm_forces
[4465]	2762
[4497]	2763
	2764	!--------------------------------------------------------------------------------------------------!
[1839]	2765	! Description:
	2766	! ------------
	2767	!> Yaw controller for the wind turbine model
[4497]	2768	!--------------------------------------------------------------------------------------------------!
	2769	SUBROUTINE wtm_yawcontrol( inot )
[4465]	2770
[4497]	2771	USE kinds
[4465]	2772
[4497]	2773	IMPLICIT NONE
[4465]	2774
[4497]	2775	INTEGER(iwp) :: inot
	2776	INTEGER(iwp) :: i_wd_30
[1819]	2777
[4497]	2778	REAL(wp) :: missal
[1819]	2779
[4497]	2780	i_wd_30 = 0_iwp
	2781
[1864]	2782	!
[4497]	2783	!-- The yaw controller computes a 30s running mean of the wind direction. If the difference
	2784	!-- between turbine alignment and wind direction exceeds 5 degrees, the turbine is yawed. The
	2785	!-- mechanism stops as soon as the 2s-running mean of the missalignment is smaller than 0.5
	2786	!-- degrees. Attention: If the timestep during the simulation changes significantly the lengths
	2787	!-- of the running means change and it does not correspond to 30s/2s anymore.
	2788	!-- ! Needs to be modified for these situations !
	2789	!-- For wind from the east, the averaging of the wind direction could cause problems and the yaw
	2790	!-- controller is probably flawed. -> Routine for averaging needs to be improved!
[1843]	2791	!
[4497]	2792	!-- Check if turbine is not yawing:
	2793	IF ( .NOT. doyaw(inot) ) THEN
[1843]	2794	!
[4497]	2795	!-- Write current wind direction into array:
	2796	wd30_l = wd30(inot,:)
	2797	wd30_l = CSHIFT( wd30_l, SHIFT = -1 )
	2798	wd30_l(1) = wdir(inot)
	2799	!
	2800	!-- Check if array is full ( no more dummies ):
	2801	IF ( .NOT. ANY( wd30_l == 999.) ) THEN
[1819]	2802
[4497]	2803	missal = SUM( wd30_l ) / SIZE( wd30_l ) - yaw_angle(inot)
[1819]	2804	!
[4497]	2805	!-- Check if turbine is missaligned by more than yaw_misalignment_max:
	2806	IF ( ABS( missal ) > yaw_misalignment_max ) THEN
[1843]	2807	!
[4497]	2808	!-- Check in which direction to yaw:
	2809	yawdir(inot) = SIGN( 1.0_wp, missal )
[1819]	2810	!
[4497]	2811	!-- Start yawing of turbine:
	2812	yaw_angle(inot) = yaw_angle(inot) + yawdir(inot) * yaw_speed * dt_3d
	2813	doyaw(inot) = .TRUE.
	2814	wd30_l = 999. ! fill with dummies again
[1819]	2815	ENDIF
[4497]	2816	ENDIF
[4465]	2817
[4497]	2818	wd30(inot,:) = wd30_l
[1819]	2819
[4465]	2820	!
[4497]	2821	!-- If turbine is already yawing:
	2822	!-- Initialize 2 s running mean and yaw until the missalignment is smaller than
	2823	!-- yaw_misalignment_min
[1819]	2824
[4497]	2825	ELSE
[1819]	2826	!
[4497]	2827	!-- Initialize 2 s running mean:
	2828
	2829	wd2_l = wd2(inot,:)
	2830	wd2_l = CSHIFT( wd2_l, SHIFT = -1 )
	2831	wd2_l(1) = wdir(inot)
[4465]	2832	!
[4497]	2833	!-- Check if array is full ( no more dummies ):
	2834	IF ( .NOT. ANY( wd2_l == 999.0_wp ) ) THEN
[1864]	2835	!
[4497]	2836	!-- Calculate missalignment of turbine:
	2837	missal = SUM( wd2_l - yaw_angle(inot) ) / SIZE( wd2_l )
[1864]	2838	!
[4497]	2839	!-- Check if missalignment is still larger than 0.5 degree and if the yaw direction is
	2840	!-- still right:
	2841	IF ( ( ABS( missal ) > yaw_misalignment_min ) .AND. &
	2842	( yawdir(inot) == SIGN( 1.0_wp, missal ) ) ) THEN
[1864]	2843	!
[4497]	2844	!-- Continue yawing:
	2845	yaw_angle(inot) = yaw_angle(inot) + yawdir(inot) * yaw_speed * dt_3d
	2846
[1819]	2847	ELSE
[1864]	2848	!
[4497]	2849	!-- Stop yawing:
	2850	doyaw(inot) = .FALSE.
	2851	wd2_l = 999.0_wp ! fill with dummies again
[1819]	2852	ENDIF
[4497]	2853	ELSE
	2854	!
	2855	!-- Continue yawing:
	2856	yaw_angle(inot) = yaw_angle(inot) + yawdir(inot) * yaw_speed * dt_3d
	2857	ENDIF
[4465]	2858
[4497]	2859	wd2(inot,:) = wd2_l
[4465]	2860
[4497]	2861	ENDIF
[4465]	2862
[4497]	2863	END SUBROUTINE wtm_yawcontrol
[1819]	2864
[1864]	2865
[4497]	2866	!--------------------------------------------------------------------------------------------------!
[1819]	2867	! Description:
	2868	! ------------
[1864]	2869	!> Initialization of the speed control
[4497]	2870	!--------------------------------------------------------------------------------------------------!
	2871	SUBROUTINE wtm_init_speed_control
[1864]	2872
	2873
[4497]	2874	IMPLICIT NONE
[1864]	2875
	2876	!
[4497]	2877	!-- If speed control is set, remaining variables and control_parameters for the control algorithm
	2878	!-- are calculated:
[1864]	2879	!
[4497]	2880	!-- Calculate slope constant for region 15:
	2881	slope15 = ( region_2_slope * region_2_min * region_2_min ) / &
	2882	( region_2_min - region_15_min )
[1864]	2883	!
[4497]	2884	!-- Calculate upper limit of slipage region:
	2885	vs_sysp = generator_speed_rated / 1.1_wp
[1864]	2886	!
[4497]	2887	!-- Calculate slope of slipage region:
	2888	region_25_slope = ( generator_power_rated / generator_speed_rated ) / &
	2889	( generator_speed_rated - vs_sysp )
[1864]	2890	!
[4497]	2891	!-- Calculate lower limit of slipage region:
	2892	region_25_min = ( region_25_slope - SQRT( region_25_slope * &
	2893	( region_25_slope - 4.0_wp * region_2_slope * vs_sysp ) ) ) / &
	2894	( 2.0_wp * region_2_slope )
[1864]	2895	!
[4497]	2896	!-- Frequency for the simple low pass filter:
	2897	fcorner = 0.25_wp
	2898	!
	2899	!-- At the first timestep the torque is set to its maximum to prevent an overspeeding of the rotor:
	2900	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
	2901	torque_gen_old(:) = generator_torque_max
	2902	ENDIF
[1864]	2903
[4497]	2904	END SUBROUTINE wtm_init_speed_control
[1864]	2905
[4497]	2906
	2907	!--------------------------------------------------------------------------------------------------!
[1864]	2908	! Description:
	2909	! ------------
	2910	!> Simple controller for the regulation of the rotor speed
[4497]	2911	!--------------------------------------------------------------------------------------------------!
	2912	SUBROUTINE wtm_speed_control( inot )
[1864]	2913
	2914
[4497]	2915	IMPLICIT NONE
[1864]	2916
[4497]	2917	INTEGER(iwp):: inot
[1864]	2918
[4465]	2919
[1864]	2920	!
[4497]	2921	!-- The controller is based on the fortran script from Jonkman et al. 2009 "Definition of a 5 MW
	2922	!-- Reference Wind Turbine for offshore system developement"
[1864]	2923
	2924	!
[4497]	2925	!-- The generator speed is filtered by a low pass filter for the control of the generator torque:
	2926	lp_coeff = EXP( -2.0_wp * 3.14_wp * dt_3d * fcorner)
	2927	generator_speed_f(inot) = ( 1.0_wp - lp_coeff ) * generator_speed(inot) + lp_coeff * &
	2928	generator_speed_f_old(inot)
[1864]	2929
[4497]	2930	IF ( generator_speed_f(inot) <= region_15_min ) THEN
[4465]	2931	!
[4497]	2932	!-- Region 1: Generator torque is set to zero to accelerate the rotor:
	2933	torque_gen(inot) = 0
[4465]	2934
[4497]	2935	ELSEIF ( generator_speed_f(inot) <= region_2_min ) THEN
[4465]	2936	!
[4497]	2937	!-- Region 1.5: Generator torque is increasing linearly with rotor speed:
	2938	torque_gen(inot) = slope15 * ( generator_speed_f(inot) - region_15_min )
[4465]	2939
[4497]	2940	ELSEIF ( generator_speed_f(inot) <= region_25_min ) THEN
[1864]	2941	!
[4497]	2942	!-- Region 2: Generator torque is increased by the square of the generator speed to keep the
	2943	!-- TSR optimal:
	2944	torque_gen(inot) = region_2_slope * generator_speed_f(inot) * generator_speed_f(inot)
[4465]	2945
[4497]	2946	ELSEIF ( generator_speed_f(inot) < generator_speed_rated ) THEN
[4465]	2947	!
[4497]	2948	!-- Region 2.5: Slipage region between 2 and 3:
	2949	torque_gen(inot) = region_25_slope * ( generator_speed_f(inot) - vs_sysp )
[4465]	2950
[4497]	2951	ELSE
[4465]	2952	!
[4497]	2953	!-- Region 3: Generator torque is antiproportional to the rotor speed to keep the power
	2954	!-- constant:
	2955	torque_gen(inot) = generator_power_rated / generator_speed_f(inot)
[4465]	2956
[4497]	2957	ENDIF
[4465]	2958	!
[4497]	2959	!-- Calculate torque rate and confine with a max:
	2960	trq_rate = ( torque_gen(inot) - torque_gen_old(inot) ) / dt_3d
	2961	trq_rate = MIN( MAX( trq_rate, -1.0_wp * generator_torque_rate_max ), generator_torque_rate_max )
[4465]	2962	!
[4497]	2963	!-- Calculate new gen torque and confine with max torque:
	2964	torque_gen(inot) = torque_gen_old(inot) + trq_rate * dt_3d
	2965	torque_gen(inot) = MIN( torque_gen(inot), generator_torque_max )
[1864]	2966	!
[4497]	2967	!-- Overwrite values for next timestep:
	2968	rotor_speed_l(inot) = generator_speed(inot) / gear_ratio
[1864]	2969
[4465]	2970
[4497]	2971	END SUBROUTINE wtm_speed_control
[1864]	2972
	2973
[4497]	2974	!--------------------------------------------------------------------------------------------------!
[1864]	2975	! Description:
	2976	! ------------
[4497]	2977	!> Application of the additional forces generated by the wind turbine on the flow components
	2978	!> (tendency terms)
[1839]	2979	!> Call for all grid points
[4497]	2980	!--------------------------------------------------------------------------------------------------!
	2981	SUBROUTINE wtm_actions( location )
[1819]	2982
	2983
[4497]	2984	CHARACTER(LEN=*) :: location !<
[3875]	2985
[4497]	2986	INTEGER(iwp) :: i !< running index
	2987	INTEGER(iwp) :: j !< running index
	2988	INTEGER(iwp) :: k !< running index
[1819]	2989
	2990
[4497]	2991	SELECT CASE ( location )
[1819]	2992
[4497]	2993	CASE ( 'before_timestep' )
[3875]	2994
[4497]	2995	CALL wtm_forces
[3875]	2996
[4497]	2997	CASE ( 'u-tendency' )
[1819]	2998	!
[4497]	2999
	3000	!-- Apply the x-component of the force to the u-component of the flow:
	3001	IF ( time_since_reference_point >= time_turbine_on ) THEN
	3002	DO i = nxlg, nxrg
	3003	DO j = nysg, nyng
	3004	DO k = nzb + 1, MAXVAL( k_hub ) + MAXVAL( k_smear )
[1819]	3005	!
[4497]	3006	!-- Calculate the thrust generated by the nacelle and the tower:
	3007	tend_nac_x = 0.5_wp * nac_cd_surf(k,j,i) * SIGN( u(k,j,i)**2 , u(k,j,i) )
	3008	tend_tow_x = 0.5_wp * tow_cd_surf(k,j,i) * SIGN( u(k,j,i)**2 , u(k,j,i) )
	3009	tend(k,j,i) = tend(k,j,i) + ( - rot_tend_x(k,j,i) - tend_nac_x - tend_tow_x ) * &
	3010	MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 1 ) )
[1819]	3011	ENDDO
	3012	ENDDO
[4497]	3013	ENDDO
	3014	ENDIF
[1819]	3015
[4497]	3016	CASE ( 'v-tendency' )
[1819]	3017	!
[4497]	3018	!-- Apply the y-component of the force to the v-component of the flow:
	3019	IF ( time_since_reference_point >= time_turbine_on ) THEN
	3020	DO i = nxlg, nxrg
	3021	DO j = nysg, nyng
	3022	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
	3023	tend_nac_y = 0.5_wp * nac_cd_surf(k,j,i) * SIGN( v(k,j,i)**2 , v(k,j,i) )
	3024	tend_tow_y = 0.5_wp * tow_cd_surf(k,j,i) * SIGN( v(k,j,i)**2 , v(k,j,i) )
	3025	tend(k,j,i) = tend(k,j,i) + ( - rot_tend_y(k,j,i) - tend_nac_y - tend_tow_y ) * &
	3026	MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 2 ) )
[1819]	3027	ENDDO
	3028	ENDDO
[4497]	3029	ENDDO
	3030	ENDIF
[1819]	3031
[4497]	3032	CASE ( 'w-tendency' )
[1819]	3033	!
[4497]	3034	!-- Apply the z-component of the force to the w-component of the flow:
	3035	IF ( time_since_reference_point >= time_turbine_on ) THEN
	3036	DO i = nxlg, nxrg
	3037	DO j = nysg, nyng
	3038	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
	3039	tend(k,j,i) = tend(k,j,i) - rot_tend_z(k,j,i) * &
	3040	MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 3 ) )
[1819]	3041	ENDDO
	3042	ENDDO
[4497]	3043	ENDDO
	3044	ENDIF
[1819]	3045
	3046
[4497]	3047	CASE DEFAULT
	3048	CONTINUE
[1819]	3049
[4497]	3050	END SELECT
[1819]	3051
	3052
[4497]	3053	END SUBROUTINE wtm_actions
[1819]	3054
	3055
[4497]	3056	!--------------------------------------------------------------------------------------------------!
[1819]	3057	! Description:
	3058	! ------------
[4497]	3059	!> Application of the additional forces generated by the wind turbine on the flow components
	3060	!> (tendency terms)
[1839]	3061	!> Call for grid point i,j
[4497]	3062	!--------------------------------------------------------------------------------------------------!
	3063	SUBROUTINE wtm_actions_ij( i, j, location )
[1819]	3064
	3065
[4497]	3066	CHARACTER (LEN=*) :: location !<
[1819]	3067
[4497]	3068	INTEGER(iwp) :: i !< running index
	3069	INTEGER(iwp) :: j !< running index
	3070	INTEGER(iwp) :: k !< running index
[1819]	3071
[4497]	3072	SELECT CASE ( location )
[3875]	3073
[4497]	3074	CASE ( 'before_timestep' )
[3875]	3075
[4497]	3076	CALL wtm_forces
	3077
	3078	CASE ( 'u-tendency' )
[1819]	3079	!
[4497]	3080	!-- Apply the x-component of the force to the u-component of the flow:
	3081	IF ( time_since_reference_point >= time_turbine_on ) THEN
	3082	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
[1819]	3083	!
[4497]	3084	!-- Calculate the thrust generated by the nacelle and the tower:
	3085	tend_nac_x = 0.5_wp * nac_cd_surf(k,j,i) * SIGN( u(k,j,i)**2 , u(k,j,i) )
	3086	tend_tow_x = 0.5_wp * tow_cd_surf(k,j,i) * SIGN( u(k,j,i)**2 , u(k,j,i) )
	3087	tend(k,j,i) = tend(k,j,i) + ( - rot_tend_x(k,j,i) - tend_nac_x - tend_tow_x ) * &
	3088	MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 1 ) )
	3089	ENDDO
	3090	ENDIF
[1819]	3091
[4497]	3092	CASE ( 'v-tendency' )
[1819]	3093	!
[4497]	3094	!-- Apply the y-component of the force to the v-component of the flow:
	3095	IF ( time_since_reference_point >= time_turbine_on ) THEN
	3096	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
	3097	tend_nac_y = 0.5_wp * nac_cd_surf(k,j,i) * SIGN( v(k,j,i)**2 , v(k,j,i) )
	3098	tend_tow_y = 0.5_wp * tow_cd_surf(k,j,i) * SIGN( v(k,j,i)**2 , v(k,j,i) )
	3099	tend(k,j,i) = tend(k,j,i) + ( - rot_tend_y(k,j,i) - tend_nac_y - tend_tow_y ) * &
	3100	MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 2 ) )
	3101	ENDDO
	3102	ENDIF
[1819]	3103
[4497]	3104	CASE ( 'w-tendency' )
[1819]	3105	!
[4497]	3106	!-- Apply the z-component of the force to the w-component of the flow:
	3107	IF ( time_since_reference_point >= time_turbine_on ) THEN
	3108	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
	3109	tend(k,j,i) = tend(k,j,i) - rot_tend_z(k,j,i) * &
	3110	MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 3 ) )
	3111	ENDDO
	3112	ENDIF
[1819]	3113
	3114
[4497]	3115	CASE DEFAULT
	3116	CONTINUE
[1819]	3117
[4497]	3118	END SELECT
[1819]	3119
	3120
[4497]	3121	END SUBROUTINE wtm_actions_ij
[1819]	3122
[4411]	3123
[4497]	3124	SUBROUTINE wtm_data_output
[4411]	3125
[4465]	3126
[4497]	3127	INTEGER(iwp) :: return_value !< returned status value of called function
	3128	INTEGER(iwp) :: t_ind = 0 !< time index
[4465]	3129
[4497]	3130	IF ( myid == 0 ) THEN
[4465]	3131
[4497]	3132	!
	3133	!-- At the first call of this routine write the spatial coordinates:
	3134	IF ( .NOT. initial_write_coordinates ) THEN
[4447]	3135	ALLOCATE ( output_values_1d_target(1:n_turbines) )
[4497]	3136	output_values_1d_target = hub_x(1:n_turbines)
[4423]	3137	output_values_1d_pointer => output_values_1d_target
[4497]	3138	return_value = dom_write_var( nc_filename, &
	3139	'x', &
	3140	values_realwp_1d = output_values_1d_pointer, &
	3141	bounds_start = (/1/), &
	3142	bounds_end = (/n_turbines/) )
[4411]	3143
[4497]	3144	output_values_1d_target = hub_y(1:n_turbines)
	3145	output_values_1d_pointer => output_values_1d_target
	3146	return_value = dom_write_var( nc_filename, &
	3147	'y', &
	3148	values_realwp_1d = output_values_1d_pointer, &
	3149	bounds_start = (/1/), &
	3150	bounds_end = (/n_turbines/) )
[4411]	3151
[4497]	3152	output_values_1d_target = hub_z(1:n_turbines)
	3153	output_values_1d_pointer => output_values_1d_target
	3154	return_value = dom_write_var( nc_filename, &
	3155	'z', &
	3156	values_realwp_1d = output_values_1d_pointer, &
	3157	bounds_start = (/1/), &
	3158	bounds_end = (/n_turbines/) )
[4411]	3159
[4497]	3160	output_values_1d_target = rotor_radius(1:n_turbines) * 2.0_wp
	3161	output_values_1d_pointer => output_values_1d_target
	3162	return_value = dom_write_var( nc_filename, &
	3163	'rotor_diameter', &
	3164	values_realwp_1d = output_values_1d_pointer, &
	3165	bounds_start = (/1/), &
	3166	bounds_end = (/n_turbines/) )
[4411]	3167
[4497]	3168	output_values_1d_target = tower_diameter(1:n_turbines)
	3169	output_values_1d_pointer => output_values_1d_target
	3170	return_value = dom_write_var( nc_filename, &
	3171	'tower_diameter', &
	3172	values_realwp_1d = output_values_1d_pointer, &
	3173	bounds_start = (/1/), &
	3174	bounds_end = (/n_turbines/) )
[4411]	3175
[4497]	3176	initial_write_coordinates = .TRUE.
	3177	DEALLOCATE ( output_values_1d_target )
	3178	ENDIF
[4411]	3179
[4497]	3180	t_ind = t_ind + 1
[4411]	3181
[4497]	3182	ALLOCATE ( output_values_1d_target(1:n_turbines) )
	3183	output_values_1d_target = rotor_speed(:)
	3184	output_values_1d_pointer => output_values_1d_target
[4411]	3185
[4497]	3186	return_value = dom_write_var( nc_filename, &
	3187	'rotor_speed', &
	3188	values_realwp_1d = output_values_1d_pointer, &
	3189	bounds_start = (/1, t_ind/), &
	3190	bounds_end = (/n_turbines, t_ind /) )
[4411]	3191
[4497]	3192	output_values_1d_target = generator_speed(:)
	3193	output_values_1d_pointer => output_values_1d_target
	3194	return_value = dom_write_var( nc_filename, &
	3195	'generator_speed', &
	3196	values_realwp_1d = output_values_1d_pointer, &
	3197	bounds_start = (/1, t_ind/), &
	3198	bounds_end = (/n_turbines, t_ind /) )
[4411]	3199
[4497]	3200	output_values_1d_target = torque_gen_old(:)
	3201	output_values_1d_pointer => output_values_1d_target
[4411]	3202
[4497]	3203	return_value = dom_write_var( nc_filename, &
	3204	'generator_torque', &
	3205	values_realwp_1d = output_values_1d_pointer, &
	3206	bounds_start = (/1, t_ind/), &
	3207	bounds_end = (/n_turbines, t_ind /) )
[4411]	3208
[4497]	3209	output_values_1d_target = torque_total(:)
	3210	output_values_1d_pointer => output_values_1d_target
[4411]	3211
[4497]	3212	return_value = dom_write_var( nc_filename, &
	3213	'rotor_torque', &
	3214	values_realwp_1d = output_values_1d_pointer, &
	3215	bounds_start = (/1, t_ind/), &
	3216	bounds_end = (/n_turbines, t_ind /) )
	3217
	3218	output_values_1d_target = pitch_angle(:)
	3219	output_values_1d_pointer => output_values_1d_target
	3220
	3221	return_value = dom_write_var( nc_filename, &
	3222	'pitch_angle', &
	3223	values_realwp_1d = output_values_1d_pointer, &
	3224	bounds_start = (/1, t_ind/), &
	3225	bounds_end = (/n_turbines, t_ind /) )
	3226
	3227	output_values_1d_target = torque_gen_old(:) * generator_speed(:) * generator_efficiency
	3228	output_values_1d_pointer => output_values_1d_target
	3229
	3230	return_value = dom_write_var( nc_filename, &
	3231	'generator_power', &
	3232	values_realwp_1d = output_values_1d_pointer, &
	3233	bounds_start = (/1, t_ind/), &
	3234	bounds_end = (/n_turbines, t_ind /) )
	3235
	3236	DO inot = 1, n_turbines
	3237	output_values_1d_target(inot) = torque_total(inot) * rotor_speed(inot) * air_density
	3238	ENDDO
	3239	output_values_1d_pointer => output_values_1d_target
	3240
	3241	return_value = dom_write_var( nc_filename, &
	3242	'rotor_power', &
	3243	values_realwp_1d = output_values_1d_pointer, &
	3244	bounds_start = (/1, t_ind/), &
	3245	bounds_end = (/n_turbines, t_ind /) )
	3246
	3247	output_values_1d_target = thrust_rotor(:)
	3248	output_values_1d_pointer => output_values_1d_target
	3249
	3250	return_value = dom_write_var( nc_filename, &
	3251	'rotor_thrust', &
	3252	values_realwp_1d = output_values_1d_pointer, &
	3253	bounds_start = (/1, t_ind/), &
	3254	bounds_end = (/n_turbines, t_ind /) )
	3255
	3256	output_values_1d_target = wdir(:)*180.0_wp/pi
	3257	output_values_1d_pointer => output_values_1d_target
	3258
	3259	return_value = dom_write_var( nc_filename, &
	3260	'wind_direction', &
	3261	values_realwp_1d = output_values_1d_pointer, &
	3262	bounds_start = (/1, t_ind/), &
	3263	bounds_end = (/n_turbines, t_ind /) )
	3264
	3265	output_values_1d_target = (yaw_angle(:)) * 180.0_wp / pi
	3266	output_values_1d_pointer => output_values_1d_target
	3267
	3268	return_value = dom_write_var( nc_filename, &
	3269	'yaw_angle', &
	3270	values_realwp_1d = output_values_1d_pointer, &
	3271	bounds_start = (/1, t_ind/), &
	3272	bounds_end = (/n_turbines, t_ind /) )
	3273
	3274	output_values_0d_target = time_since_reference_point
	3275	output_values_0d_pointer => output_values_0d_target
	3276
	3277	return_value = dom_write_var( nc_filename, &
	3278	'time', &
	3279	values_realwp_0d = output_values_0d_pointer, &
	3280	bounds_start = (/t_ind/), &
	3281	bounds_end = (/t_ind/) )
	3282
	3283	DEALLOCATE ( output_values_1d_target )
	3284
	3285	ENDIF
	3286
	3287	END SUBROUTINE wtm_data_output
	3288
[1819]	3289	END MODULE wind_turbine_model_mod

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source: palm/trunk/SOURCE/wind_turbine_model_mod.f90 @ 4848

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