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source: palm/trunk/SOURCE/wind_turbine_model_mod.f90 @ 4396

Last change on this file since 4396 was 4360, checked in by suehring, 5 years ago
Bugfix in output of time-averaged plant-canopy quanities; Output of plant-canopy data only where tall canopy is defined; land-surface model: fix wrong location strings; tests: update urban test case; all source code files: copyright update
Property svn:keywords set to `Id`
File size: 118.7 KB

Rev	Line
[1820]	1	!> @file wind_turbine_model_mod.f90
[1912]	2	!------------------------------------------------------------------------------!
[2696]	3	! This file is part of the PALM model system.
[1819]	4	!
[2000]	5	! PALM is free software: you can redistribute it and/or modify it under the
	6	! terms of the GNU General Public License as published by the Free Software
	7	! Foundation, either version 3 of the License, or (at your option) any later
	8	! version.
[1819]	9	!
	10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
	11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	13	!
	14	! You should have received a copy of the GNU General Public License along with
	15	! PALM. If not, see <http://www.gnu.org/licenses/>.
	16	!
[3885]	17	! Copyright 2009-2019 Carl von Ossietzky Universitaet Oldenburg
[4360]	18	! Copyright 1997-2020 Leibniz Universitaet Hannover
[1912]	19	!------------------------------------------------------------------------------!
[1819]	20	!
	21	! Current revisions:
	22	! -----------------
[1913]	23	!
[3139]	24	!
[1913]	25	! Former revisions:
	26	! -----------------
	27	! $Id: wind_turbine_model_mod.f90 4360 2020-01-07 11:25:50Z Giersch $
[4346]	28	! Introduction of wall_flags_total_0, which currently sets bits based on static
	29	! topography information used in wall_flags_static_0
	30	!
	31	! 4343 2019-12-17 12:26:12Z oliver.maas
[4343]	32	! replaced <= by < in line 1464 to ensure that ialpha will not be
	33	! greater than dlen
	34	!
	35	! 4329 2019-12-10 15:46:36Z motisi
[4329]	36	! Renamed wall_flags_0 to wall_flags_static_0
	37	!
	38	! 4326 2019-12-06 14:16:14Z oliver.maas
[4326]	39	! changed format of turbine control output to allow for higher
	40	! torque and power values
	41	!
	42	! 4182 2019-08-22 15:20:23Z scharf
[4182]	43	! Corrected "Former revisions" section
	44	!
	45	! 4144 2019-08-06 09:11:47Z raasch
[4144]	46	! relational operators .EQ., .NE., etc. replaced by ==, /=, etc.
	47	!
	48	! 4056 2019-06-27 13:53:16Z Giersch
[4056]	49	! CASE DEFAULT action in wtm_actions needs to be CONTINUE. Otherwise an abort
	50	! will happen for location values that are not implemented as CASE statements
	51	! but are already realized in the code (e.g. pt-tendency)
	52	!
	53	! 3885 2019-04-11 11:29:34Z kanani
[3885]	54	! Changes related to global restructuring of location messages and introduction
	55	! of additional debug messages
	56	!
	57	! 3875 2019-04-08 17:35:12Z knoop
[3875]	58	! Addaped wtm_tendency to fit the module actions interface
	59	!
	60	! 3832 2019-03-28 13:16:58Z raasch
[3832]	61	! instrumented with openmp directives
	62	!
	63	! 3725 2019-02-07 10:11:02Z raasch
[3725]	64	! unused variables removed
	65	!
	66	! 3685 2019-01-21 01:02:11Z knoop
[3685]	67	! Some interface calls moved to module_interface + cleanup
	68	!
	69	! 3655 2019-01-07 16:51:22Z knoop
[3593]	70	! Replace degree symbol by 'degrees'
[4182]	71	!
	72	! 1914 2016-05-26 14:44:07Z witha
	73	! Initial revision
	74	!
[3593]	75	!
[1819]	76	! Description:
	77	! ------------
	78	!> This module calculates the effect of wind turbines on the flow fields. The
	79	!> initial version contains only the advanced actuator disk with rotation method
	80	!> (ADM-R).
	81	!> The wind turbines include the tower effect, can be yawed and tilted.
	82	!> The wind turbine model includes controllers for rotational speed, pitch and
	83	!> yaw.
	84	!> Currently some specifications of the NREL 5 MW reference turbine
	85	!> are hardcoded whereas most input data comes from separate files (currently
	86	!> external, planned to be included as namelist which will be read in
	87	!> automatically).
	88	!>
[3065]	89	!> @todo Replace dz(1) appropriatly to account for grid stretching
[1819]	90	!> @todo Revise code according to PALM Coding Standard
	91	!> @todo Implement ADM and ALM turbine models
	92	!> @todo Generate header information
[1917]	93	!> @todo Implement further parameter checks and error messages
[1819]	94	!> @todo Revise and add code documentation
	95	!> @todo Output turbine parameters as timeseries
	96	!> @todo Include additional output variables
[1864]	97	!> @todo Revise smearing the forces for turbines in yaw
	98	!> @todo Revise nacelle and tower parameterization
	99	!> @todo Allow different turbine types in one simulation
[1819]	100	!
	101	!------------------------------------------------------------------------------!
	102	MODULE wind_turbine_model_mod
	103
	104	USE arrays_3d, &
[2553]	105	ONLY: tend, u, v, w, zu, zw
[1819]	106
[3274]	107	USE basic_constants_and_equations_mod, &
[2553]	108	ONLY: pi
[1819]	109
	110	USE control_parameters, &
[3885]	111	ONLY: coupling_char, &
	112	debug_output, &
	113	dt_3d, dz, message_string, simulated_time, &
[2894]	114	wind_turbine, initializing_actions
[1819]	115
	116	USE cpulog, &
	117	ONLY: cpu_log, log_point_s
	118
	119	USE grid_variables, &
	120	ONLY: ddx, dx, ddy, dy
	121
	122	USE indices, &
	123	ONLY: nbgp, nx, nxl, nxlg, nxr, nxrg, ny, nyn, nyng, nys, nysg, nz, &
[4346]	124	nzb, nzt, wall_flags_total_0
[1819]	125
	126	USE kinds
	127
	128	USE pegrid
	129
	130
	131	IMPLICIT NONE
	132
[1864]	133	PRIVATE
[1819]	134
	135	!
	136	!-- Variables specified in the namelist wind_turbine_par
	137
[1864]	138	INTEGER(iwp) :: nairfoils = 8 !< number of airfoils of the used turbine model (for ADM-R and ALM)
[1839]	139	INTEGER(iwp) :: nturbines = 1 !< number of turbines
[1819]	140
[1839]	141	LOGICAL :: pitch_control = .FALSE. !< switch for use of pitch controller
	142	LOGICAL :: speed_control = .FALSE. !< switch for use of speed controller
	143	LOGICAL :: yaw_control = .FALSE. !< switch for use of yaw controller
[2152]	144	LOGICAL :: tl_cor = .FALSE. !< switch for use of tip loss correct.
[1819]	145
[1839]	146	REAL(wp) :: segment_length = 1.0_wp !< length of the segments, the rotor area is divided into
	147	!< (in tangential direction, as factor of MIN(dx,dy,dz))
	148	REAL(wp) :: segment_width = 0.5_wp !< width of the segments, the rotor area is divided into
	149	!< (in radial direction, as factor of MIN(dx,dy,dz))
	150	REAL(wp) :: time_turbine_on = 0.0_wp !< time at which turbines are started
	151	REAL(wp) :: tilt = 0.0_wp !< vertical tilt of the rotor [degree] ( positive = backwards )
[1819]	152
[1912]	153	REAL(wp), DIMENSION(1:100) :: dtow = 0.0_wp !< tower diameter [m]
[2553]	154	REAL(wp), DIMENSION(1:100) :: omega_rot = 0.9_wp !< inital or constant rotor speed [rad/s]
[1912]	155	REAL(wp), DIMENSION(1:100) :: phi_yaw = 0.0_wp !< yaw angle [degree] ( clockwise, 0 = facing west )
	156	REAL(wp), DIMENSION(1:100) :: pitch_add = 0.0_wp !< constant pitch angle
	157	REAL(wp), DIMENSION(1:100) :: rcx = 9999999.9_wp !< position of hub in x-direction
	158	REAL(wp), DIMENSION(1:100) :: rcy = 9999999.9_wp !< position of hub in y-direction
	159	REAL(wp), DIMENSION(1:100) :: rcz = 9999999.9_wp !< position of hub in z-direction
	160	REAL(wp), DIMENSION(1:100) :: rnac = 0.0_wp !< nacelle diameter [m]
	161	REAL(wp), DIMENSION(1:100) :: rr = 63.0_wp !< rotor radius [m]
[3725]	162	! REAL(wp), DIMENSION(1:100) :: turb_cd_nacelle = 0.85_wp !< drag coefficient for nacelle
[1912]	163	REAL(wp), DIMENSION(1:100) :: turb_cd_tower = 1.2_wp !< drag coefficient for tower
[1839]	164
[1819]	165	!
	166	!-- Variables specified in the namelist for speed controller
	167	!-- Default values are from the NREL 5MW research turbine (Jonkman, 2008)
	168
[1912]	169	REAL(wp) :: rated_power = 5296610.0_wp !< rated turbine power [W]
[1839]	170	REAL(wp) :: gear_ratio = 97.0_wp !< Gear ratio from rotor to generator
[2341]	171	REAL(wp) :: inertia_rot = 34784179.0_wp !< Inertia of the rotor [kg*m2]
	172	REAL(wp) :: inertia_gen = 534.116_wp !< Inertia of the generator [kg*m2]
[1839]	173	REAL(wp) :: gen_eff = 0.944_wp !< Electric efficiency of the generator
	174	REAL(wp) :: gear_eff = 1.0_wp !< Loss between rotor and generator
	175	REAL(wp) :: air_dens = 1.225_wp !< Air density to convert to W [kg/m3]
	176	REAL(wp) :: rated_genspeed = 121.6805_wp !< Rated generator speed [rad/s]
[1912]	177	REAL(wp) :: max_torque_gen = 47402.91_wp !< Maximum of the generator torque [Nm]
[1839]	178	REAL(wp) :: slope2 = 2.332287_wp !< Slope constant for region 2
	179	REAL(wp) :: min_reg2 = 91.21091_wp !< Lower generator speed boundary of region 2 [rad/s]
	180	REAL(wp) :: min_reg15 = 70.16224_wp !< Lower generator speed boundary of region 1.5 [rad/s]
[1912]	181	REAL(wp) :: max_trq_rate = 15000.0_wp !< Max generator torque increase [Nm/s]
	182	REAL(wp) :: pitch_rate = 8.0_wp !< Max pitch rate [degree/s]
[1839]	183
[1912]	184
[1819]	185	!
	186	!-- Variables specified in the namelist for yaw control
	187
[1839]	188	REAL(wp) :: yaw_speed = 0.005236_wp !< speed of the yaw actuator [rad/s]
	189	REAL(wp) :: max_miss = 0.08726_wp !< maximum tolerated yaw missalignment [rad]
	190	REAL(wp) :: min_miss = 0.008726_wp !< minimum yaw missalignment for which the actuator stops [rad]
	191
[1819]	192	!
	193	!-- Set flag for output files TURBINE_PARAMETERS
	194	TYPE file_status
	195	LOGICAL :: opened, opened_before
	196	END TYPE file_status
	197
[1912]	198	TYPE(file_status), DIMENSION(500) :: openfile_turb_mod = &
	199	file_status(.FALSE.,.FALSE.)
[1819]	200
	201	!
	202	!-- Variables for initialization of the turbine model
	203
[1839]	204	INTEGER(iwp) :: inot !< turbine loop index (turbine id)
	205	INTEGER(iwp) :: nsegs_max !< maximum number of segments (all turbines, required for allocation of arrays)
	206	INTEGER(iwp) :: nrings_max !< maximum number of rings (all turbines, required for allocation of arrays)
	207	INTEGER(iwp) :: ring !< ring loop index (ring number)
	208	INTEGER(iwp) :: upper_end !<
[1819]	209
[1839]	210	INTEGER(iwp), DIMENSION(1) :: lct !<
[1819]	211
[1912]	212	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: i_hub !< index belonging to x-position of the turbine
	213	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: i_smear !< index defining the area for the smearing of the forces (x-direction)
	214	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: j_hub !< index belonging to y-position of the turbine
	215	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: j_smear !< index defining the area for the smearing of the forces (y-direction)
	216	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: k_hub !< index belonging to hub height
	217	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: k_smear !< index defining the area for the smearing of the forces (z-direction)
	218	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nrings !< number of rings per turbine
	219	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nsegs_total !< total number of segments per turbine
[1819]	220
[1912]	221	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: nsegs !< number of segments per ring and turbine
[1819]	222
[1912]	223	!
	224	!- parameters for the smearing from the rotor to the cartesian grid
[1864]	225	REAL(wp) :: pol_a !< parameter for the polynomial smearing fct
	226	REAL(wp) :: pol_b !< parameter for the polynomial smearing fct
[1912]	227	REAL(wp) :: delta_t_factor !<
[1864]	228	REAL(wp) :: eps_factor !<
[1839]	229	REAL(wp) :: eps_min !<
	230	REAL(wp) :: eps_min2 !<
[1819]	231
[1839]	232	!
	233	!-- Variables for the calculation of lift and drag coefficients
[1912]	234	REAL(wp), DIMENSION(:), ALLOCATABLE :: ard !<
	235	REAL(wp), DIMENSION(:), ALLOCATABLE :: crd !<
	236	REAL(wp), DIMENSION(:), ALLOCATABLE :: delta_r !< radial segment length
	237	REAL(wp), DIMENSION(:), ALLOCATABLE :: lrd !<
[1864]	238
[1912]	239	REAL(wp) :: accu_cl_cd_tab = 0.1_wp !< Accuracy of the interpolation of
	240	!< the lift and drag coeff [deg]
[1819]	241
[1912]	242	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: turb_cd_tab !< table of the blade drag coefficient
	243	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: turb_cl_tab !< table of the blade lift coefficient
[1819]	244
[1912]	245	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: nac_cd_surf !< 3d field of the tower drag coefficient
	246	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: tow_cd_surf !< 3d field of the nacelle drag coefficient
[1819]	247
	248	!
	249	!-- Variables for the calculation of the forces
[1912]	250
[1839]	251	REAL(wp) :: cur_r !<
	252	REAL(wp) :: phi_rotor !<
	253	REAL(wp) :: pre_factor !<
	254	REAL(wp) :: torque_seg !<
	255	REAL(wp) :: u_int_l !<
	256	REAL(wp) :: u_int_u !<
	257	REAL(wp) :: u_rot !<
	258	REAL(wp) :: v_int_l !<
	259	REAL(wp) :: v_int_u !<
	260	REAL(wp) :: w_int_l !<
	261	REAL(wp) :: w_int_u !<
[3832]	262	!$OMP THREADPRIVATE (cur_r, phi_rotor, pre_factor, torque_seg, u_int_l, u_int_u, u_rot, &
	263	!$OMP& v_int_l, v_int_u, w_int_l, w_int_u)
[1912]	264	!
	265	!- Tendencies from the nacelle and tower thrust
	266	REAL(wp) :: tend_nac_x = 0.0_wp !<
	267	REAL(wp) :: tend_tow_x = 0.0_wp !<
	268	REAL(wp) :: tend_nac_y = 0.0_wp !<
	269	REAL(wp) :: tend_tow_y = 0.0_wp !<
[3832]	270	!$OMP THREADPRIVATE (tend_nac_x, tend_tow_x, tend_nac_y, tend_tow_y)
[1819]	271
[1912]	272	REAL(wp), DIMENSION(:), ALLOCATABLE :: alpha_attack !<
	273	REAL(wp), DIMENSION(:), ALLOCATABLE :: chord !<
	274	REAL(wp), DIMENSION(:), ALLOCATABLE :: phi_rel !<
	275	REAL(wp), DIMENSION(:), ALLOCATABLE :: torque_total !<
	276	REAL(wp), DIMENSION(:), ALLOCATABLE :: thrust_rotor !<
	277	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cl !<
	278	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cd !<
	279	REAL(wp), DIMENSION(:), ALLOCATABLE :: vrel !<
	280	REAL(wp), DIMENSION(:), ALLOCATABLE :: vtheta !<
	281
	282	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: rbx, rby, rbz !< coordinates of the blade elements
	283	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: rotx, roty, rotz !< normal vectors to the rotor coordinates
	284
	285	!
	286	!- Fields for the interpolation of velocities on the rotor grid
	287	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: u_int !<
	288	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: u_int_1_l !<
	289	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: v_int !<
	290	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: v_int_1_l !<
	291	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: w_int !<
	292	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: w_int_1_l !<
	293
	294	!
	295	!- rotor tendencies on the segments
	296	REAL(wp), DIMENSION(:), ALLOCATABLE :: thrust_seg !<
	297	REAL(wp), DIMENSION(:), ALLOCATABLE :: torque_seg_y !<
	298	REAL(wp), DIMENSION(:), ALLOCATABLE :: torque_seg_z !<
	299
	300	!
	301	!- rotor tendencies on the rings
	302	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: thrust_ring !<
	303	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: torque_ring_y !<
	304	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: torque_ring_z !<
	305
	306	!
	307	!- rotor tendencies on rotor grids for all turbines
	308	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: thrust !<
	309	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: torque_y !<
	310	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: torque_z !<
	311
	312	!
	313	!- rotor tendencies on coordinate grid
	314	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: rot_tend_x !<
	315	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: rot_tend_y !<
	316	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: rot_tend_z !<
	317	!
	318	!- variables for the rotation of the rotor coordinates
	319	REAL(wp), DIMENSION(1:100,1:3,1:3) :: rot_coord_trans !< matrix for rotation of rotor coordinates
	320
[1839]	321	REAL(wp), DIMENSION(1:3) :: rot_eigen_rad !<
	322	REAL(wp), DIMENSION(1:3) :: rot_eigen_azi !<
	323	REAL(wp), DIMENSION(1:3) :: rot_eigen_nor !<
	324	REAL(wp), DIMENSION(1:3) :: re !<
	325	REAL(wp), DIMENSION(1:3) :: rea !<
	326	REAL(wp), DIMENSION(1:3) :: ren !<
	327	REAL(wp), DIMENSION(1:3) :: rote !<
	328	REAL(wp), DIMENSION(1:3) :: rota !<
	329	REAL(wp), DIMENSION(1:3) :: rotn !<
[1819]	330
[1839]	331	!
	332	!-- Fixed variables for the speed controller
[1819]	333
[1912]	334	LOGICAL :: start_up = .TRUE. !<
[1864]	335
[1912]	336	REAL(wp) :: Fcorner !< corner freq for the controller low pass filter
	337	REAL(wp) :: min_reg25 !< min region 2.5
	338	REAL(wp) :: om_rate !< rotor speed change
	339	REAL(wp) :: slope15 !< slope in region 1.5
	340	REAL(wp) :: slope25 !< slope in region 2.5
	341	REAL(wp) :: trq_rate !< torque change
	342	REAL(wp) :: vs_sysp !<
	343	REAL(wp) :: lp_coeff !< coeff for the controller low pass filter
[1819]	344
[1864]	345	REAL(wp), DIMENSION(100) :: omega_rot_l = 0.0_wp !< local rot speed [rad/s]
[2563]	346
[1839]	347	!
	348	!-- Fixed variables for the yaw controller
[1819]	349
[1912]	350	REAL(wp), DIMENSION(:) , ALLOCATABLE :: yawdir !< direction to yaw
	351	REAL(wp), DIMENSION(:) , ALLOCATABLE :: phi_yaw_l !< local (cpu) yaw angle
	352	REAL(wp), DIMENSION(:) , ALLOCATABLE :: wd30_l !< local (cpu) long running avg of the wd
	353	REAL(wp), DIMENSION(:) , ALLOCATABLE :: wd2_l !< local (cpu) short running avg of the wd
	354	REAL(wp), DIMENSION(:) , ALLOCATABLE :: wdir !< wind direction at hub
	355	REAL(wp), DIMENSION(:) , ALLOCATABLE :: u_inflow !< wind speed at hub
	356	REAL(wp), DIMENSION(:) , ALLOCATABLE :: wdir_l !<
	357	REAL(wp), DIMENSION(:) , ALLOCATABLE :: u_inflow_l !<
	358	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: wd30 !<
	359	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: wd2 !<
	360	LOGICAL, DIMENSION(1:100) :: doyaw = .FALSE. !<
	361	INTEGER(iwp) :: WDLON !<
	362	INTEGER(iwp) :: WDSHO !<
[1819]	363
[2563]	364	!
	365	!-- Variables that have to be saved in the binary file for restarts
	366	REAL(wp), DIMENSION(1:100) :: pitch_add_old = 0.0_wp !< old constant pitch angle
	367	REAL(wp), DIMENSION(1:100) :: omega_gen = 0.0_wp !< curr. generator speed
	368	REAL(wp), DIMENSION(1:100) :: omega_gen_f = 0.0_wp !< filtered generator speed
	369	REAL(wp), DIMENSION(1:100) :: omega_gen_old = 0.0_wp !< last generator speed
	370	REAL(wp), DIMENSION(1:100) :: omega_gen_f_old = 0.0_wp !< last filtered generator speed
	371	REAL(wp), DIMENSION(1:100) :: torque_gen = 0.0_wp !< generator torque
	372	REAL(wp), DIMENSION(1:100) :: torque_gen_old = 0.0_wp !< last generator torque
[1819]	373
[2563]	374
[1839]	375	SAVE
[1819]	376
[1839]	377
	378	INTERFACE wtm_parin
	379	MODULE PROCEDURE wtm_parin
	380	END INTERFACE wtm_parin
[2563]	381
[1912]	382	INTERFACE wtm_check_parameters
	383	MODULE PROCEDURE wtm_check_parameters
	384	END INTERFACE wtm_check_parameters
[3875]	385
[1839]	386	INTERFACE wtm_init_arrays
	387	MODULE PROCEDURE wtm_init_arrays
	388	END INTERFACE wtm_init_arrays
	389
	390	INTERFACE wtm_init
	391	MODULE PROCEDURE wtm_init
	392	END INTERFACE wtm_init
[2553]	393
[3875]	394	INTERFACE wtm_actions
	395	MODULE PROCEDURE wtm_actions
	396	MODULE PROCEDURE wtm_actions_ij
	397	END INTERFACE wtm_actions
[1819]	398
[3875]	399	INTERFACE wtm_rrd_global
	400	MODULE PROCEDURE wtm_rrd_global
	401	END INTERFACE wtm_rrd_global
[1819]	402
[3875]	403	INTERFACE wtm_wrd_global
	404	MODULE PROCEDURE wtm_wrd_global
	405	END INTERFACE wtm_wrd_global
[2563]	406
[3875]	407
	408	PUBLIC &
	409	wtm_parin, &
	410	wtm_check_parameters, &
	411	wtm_init_arrays, &
	412	wtm_init, &
	413	wtm_actions, &
	414	wtm_rrd_global, &
	415	wtm_wrd_global
	416
	417
[1819]	418	CONTAINS
	419
	420
	421	!------------------------------------------------------------------------------!
	422	! Description:
	423	! ------------
[1839]	424	!> Parin for &wind_turbine_par for wind turbine model
[1819]	425	!------------------------------------------------------------------------------!
[1839]	426	SUBROUTINE wtm_parin
[1819]	427
	428
	429	IMPLICIT NONE
[1912]	430
[1839]	431	CHARACTER (LEN=80) :: line !< dummy string that contains the current line of the parameter file
	432
	433	NAMELIST /wind_turbine_par/ air_dens, dtow, gear_eff, gear_ratio, &
[1864]	434	gen_eff, inertia_gen, inertia_rot, max_miss, &
[1839]	435	max_torque_gen, max_trq_rate, min_miss, &
[1864]	436	min_reg15, min_reg2, nairfoils, nturbines, &
[1912]	437	omega_rot, phi_yaw, pitch_add, pitch_control,&
[1839]	438	rated_genspeed, rated_power, rcx, rcy, rcz, &
	439	rnac, rr, segment_length, segment_width, &
[1864]	440	slope2, speed_control, tilt, time_turbine_on,&
[3725]	441	turb_cd_tower, pitch_rate, &
[2152]	442	yaw_control, yaw_speed, tl_cor
[3725]	443	! , turb_cd_nacelle
[2932]	444
	445	NAMELIST /wind_turbine_parameters/ &
	446	air_dens, dtow, gear_eff, gear_ratio, &
	447	gen_eff, inertia_gen, inertia_rot, max_miss, &
	448	max_torque_gen, max_trq_rate, min_miss, &
	449	min_reg15, min_reg2, nairfoils, nturbines, &
	450	omega_rot, phi_yaw, pitch_add, pitch_control,&
	451	rated_genspeed, rated_power, rcx, rcy, rcz, &
	452	rnac, rr, segment_length, segment_width, &
	453	slope2, speed_control, tilt, time_turbine_on,&
[3725]	454	turb_cd_tower, pitch_rate, &
[2932]	455	yaw_control, yaw_speed, tl_cor
[3725]	456	! , turb_cd_nacelle
[1819]	457	!
[1839]	458	!-- Try to find wind turbine model package
	459	REWIND ( 11 )
	460	line = ' '
[3248]	461	DO WHILE ( INDEX( line, '&wind_turbine_parameters' ) == 0 )
[3246]	462	READ ( 11, '(A)', END=12 ) line
[1839]	463	ENDDO
	464	BACKSPACE ( 11 )
	465
	466	!
	467	!-- Read user-defined namelist
[3246]	468	READ ( 11, wind_turbine_parameters, ERR = 10 )
[2932]	469	!
	470	!-- Set flag that indicates that the wind turbine model is switched on
	471	wind_turbine = .TRUE.
	472
[3246]	473	GOTO 14
[2932]	474
[3246]	475	10 BACKSPACE( 11 )
[3248]	476	READ( 11 , '(A)') line
	477	CALL parin_fail_message( 'wind_turbine_parameters', line )
[3246]	478
[2932]	479	!
	480	!-- Try to find wind turbine model package
[3246]	481	12 REWIND ( 11 )
[2932]	482	line = ' '
[3248]	483	DO WHILE ( INDEX( line, '&wind_turbine_par' ) == 0 )
[3246]	484	READ ( 11, '(A)', END=14 ) line
[2932]	485	ENDDO
	486	BACKSPACE ( 11 )
	487
	488	!
	489	!-- Read user-defined namelist
[3246]	490	READ ( 11, wind_turbine_par, ERR = 13, END = 14 )
[2932]	491
	492	message_string = 'namelist wind_tubrine_par is deprecated and will ' // &
[3046]	493	'be removed in near future. &Please use namelist ' // &
[2932]	494	'wind_turbine_parameters instead'
	495	CALL message( 'wtm_parin', 'PA0487', 0, 1, 0, 6, 0 )
	496
[1839]	497	!
	498	!-- Set flag that indicates that the wind turbine model is switched on
	499	wind_turbine = .TRUE.
	500
[3246]	501	GOTO 14
[2563]	502
[3246]	503	13 BACKSPACE( 11 )
[3248]	504	READ( 11 , '(A)') line
	505	CALL parin_fail_message( 'wind_turbine_par', line )
[1839]	506
[3246]	507	14 CONTINUE ! TBD Change from continue, mit ierrn machen
	508
	509
[1839]	510	END SUBROUTINE wtm_parin
	511
[2563]	512
	513	!------------------------------------------------------------------------------!
	514	! Description:
	515	! ------------
[2894]	516	!> This routine writes the respective restart data.
[2576]	517	!------------------------------------------------------------------------------!
[2894]	518	SUBROUTINE wtm_wrd_global
[2576]	519
	520
[2563]	521	IMPLICIT NONE
[2776]	522
[2563]	523
[2894]	524	CALL wrd_write_string( 'omega_gen' )
[2563]	525	WRITE ( 14 ) omega_gen
[2894]	526
	527	CALL wrd_write_string( 'omega_gen_f' )
[2563]	528	WRITE ( 14 ) omega_gen_f
[2894]	529
	530	CALL wrd_write_string( 'omega_gen_f_old' )
[2563]	531	WRITE ( 14 ) omega_gen_f_old
[2894]	532
	533	CALL wrd_write_string( 'omega_gen_old' )
[2563]	534	WRITE ( 14 ) omega_gen_old
[2894]	535
	536	CALL wrd_write_string( 'omega_rot' )
[2563]	537	WRITE ( 14 ) omega_rot
[2894]	538
	539	CALL wrd_write_string( 'phi_yaw' )
	540	WRITE ( 14 ) phi_yaw
	541
	542	CALL wrd_write_string( 'pitch_add' )
[2563]	543	WRITE ( 14 ) pitch_add
[2894]	544
	545	CALL wrd_write_string( 'pitch_add_old' )
[2563]	546	WRITE ( 14 ) pitch_add_old
[2894]	547
	548	CALL wrd_write_string( 'torque_gen' )
[2563]	549	WRITE ( 14 ) torque_gen
[2894]	550
	551	CALL wrd_write_string( 'torque_gen_old' )
[2563]	552	WRITE ( 14 ) torque_gen_old
[2894]	553
[2563]	554
[2894]	555	END SUBROUTINE wtm_wrd_global
[2563]	556
	557
	558	!------------------------------------------------------------------------------!
	559	! Description:
	560	! ------------
	561	!> This routine reads the respective restart data.
	562	!------------------------------------------------------------------------------!
[2894]	563	SUBROUTINE wtm_rrd_global( found )
[2563]	564
	565
[2894]	566	USE control_parameters, &
	567	ONLY: length, restart_string
	568
	569
[2563]	570	IMPLICIT NONE
	571
[2894]	572	LOGICAL, INTENT(OUT) :: found
[2563]	573
	574
[2894]	575	found = .TRUE.
[2563]	576
	577
[2894]	578	SELECT CASE ( restart_string(1:length) )
[2563]	579
[2894]	580	CASE ( 'omega_gen' )
	581	READ ( 13 ) omega_gen
	582	CASE ( 'omega_gen_f' )
	583	READ ( 13 ) omega_gen_f
	584	CASE ( 'omega_gen_f_old' )
	585	READ ( 13 ) omega_gen_f_old
	586	CASE ( 'omega_gen_old' )
	587	READ ( 13 ) omega_gen_old
	588	CASE ( 'omega_rot' )
	589	READ ( 13 ) omega_rot
	590	CASE ( 'phi_yaw' )
	591	READ ( 13 ) phi_yaw
	592	CASE ( 'pitch_add' )
	593	READ ( 13 ) pitch_add
	594	CASE ( 'pitch_add_old' )
	595	READ ( 13 ) pitch_add_old
	596	CASE ( 'torque_gen' )
	597	READ ( 13 ) torque_gen
	598	CASE ( 'torque_gen_old' )
	599	READ ( 13 ) torque_gen_old
[2563]	600
[2894]	601	CASE DEFAULT
[2563]	602
[2894]	603	found = .FALSE.
[2563]	604
[2894]	605	END SELECT
	606
[2563]	607
[2894]	608	END SUBROUTINE wtm_rrd_global
	609
	610
[2563]	611	!------------------------------------------------------------------------------!
	612	! Description:
	613	! ------------
	614	!> Check namelist parameter
	615	!------------------------------------------------------------------------------!
[1912]	616	SUBROUTINE wtm_check_parameters
	617
	618
	619	IMPLICIT NONE
	620
	621	IF ( ( .NOT.speed_control ) .AND. pitch_control ) THEN
	622	message_string = 'pitch_control = .TRUE. requires '// &
	623	'speed_control = .TRUE.'
[2322]	624	CALL message( 'wtm_check_parameters', 'PA0461', 1, 2, 0, 6, 0 )
[1912]	625	ENDIF
	626
[2322]	627	IF ( ANY( omega_rot(1:nturbines) < 0.0 ) ) THEN
	628	message_string = 'omega_rot < 0.0, Please set omega_rot to ' // &
[2792]	629	'a value equal or larger than zero'
[2322]	630	CALL message( 'wtm_check_parameters', 'PA0462', 1, 2, 0, 6, 0 )
[1912]	631	ENDIF
	632
	633
	634	IF ( ANY( rcx(1:nturbines) == 9999999.9_wp ) .OR. &
	635	ANY( rcy(1:nturbines) == 9999999.9_wp ) .OR. &
	636	ANY( rcz(1:nturbines) == 9999999.9_wp ) ) THEN
	637
	638	message_string = 'rcx, rcy, rcz ' // &
	639	'have to be given for each turbine.'
[2322]	640	CALL message( 'wtm_check_parameters', 'PA0463', 1, 2, 0, 6, 0 )
[1912]	641
	642	ENDIF
	643
	644
	645	END SUBROUTINE wtm_check_parameters
	646
	647
[1839]	648	!------------------------------------------------------------------------------!
	649	! Description:
	650	! ------------
	651	!> Allocate wind turbine model arrays
	652	!------------------------------------------------------------------------------!
	653	SUBROUTINE wtm_init_arrays
	654
	655
	656	IMPLICIT NONE
	657
[1864]	658	REAL(wp) :: delta_r_factor !<
	659	REAL(wp) :: delta_r_init !<
	660
[1839]	661	!
	662	!-- To be able to allocate arrays with dimension of rotor rings and segments,
[1819]	663	!-- the maximum possible numbers of rings and segments have to be calculated:
	664
	665	ALLOCATE( nrings(1:nturbines) )
	666	ALLOCATE( delta_r(1:nturbines) )
	667
	668	nrings(:) = 0
	669	delta_r(:) = 0.0_wp
	670
	671	!
	672	!-- Thickness (radial) of each ring and length (tangential) of each segment:
	673	delta_r_factor = segment_width
	674	delta_t_factor = segment_length
[3065]	675	delta_r_init = delta_r_factor * MIN( dx, dy, dz(1))
[1819]	676
	677	DO inot = 1, nturbines
	678	!
	679	!-- Determine number of rings:
	680	nrings(inot) = NINT( rr(inot) / delta_r_init )
	681
	682	delta_r(inot) = rr(inot) / nrings(inot)
	683
	684	ENDDO
	685
	686	nrings_max = MAXVAL(nrings)
	687
	688	ALLOCATE( nsegs(1:nrings_max,1:nturbines) )
	689	ALLOCATE( nsegs_total(1:nturbines) )
	690
	691	nsegs(:,:) = 0
	692	nsegs_total(:) = 0
	693
	694
	695	DO inot = 1, nturbines
	696	DO ring = 1, nrings(inot)
	697	!
	698	!-- Determine number of segments for each ring:
[1839]	699	nsegs(ring,inot) = MAX( 8, CEILING( delta_r_factor * pi * &
	700	( 2.0_wp * ring - 1.0_wp ) / &
	701	delta_t_factor ) )
[1819]	702	ENDDO
	703	!
	704	!-- Total sum of all rotor segments:
[1839]	705	nsegs_total(inot) = SUM( nsegs(:,inot) )
[1819]	706
	707	ENDDO
	708
	709	!
	710	!-- Maximum number of segments per ring:
	711	nsegs_max = MAXVAL(nsegs)
	712
[1864]	713	!!
	714	!!-- TODO: Folgendes im Header ausgeben!
	715	! IF ( myid == 0 ) THEN
	716	! PRINT*, 'nrings(1) = ', nrings(1)
	717	! PRINT*, '--------------------------------------------------'
	718	! PRINT*, 'nsegs(:,1) = ', nsegs(:,1)
	719	! PRINT*, '--------------------------------------------------'
	720	! PRINT*, 'nrings_max = ', nrings_max
	721	! PRINT*, 'nsegs_max = ', nsegs_max
	722	! PRINT*, 'nsegs_total(1) = ', nsegs_total(1)
	723	! ENDIF
[1819]	724
	725
	726	!
	727	!-- Allocate 1D arrays (dimension = number of turbines)
	728	ALLOCATE( i_hub(1:nturbines) )
	729	ALLOCATE( i_smear(1:nturbines) )
	730	ALLOCATE( j_hub(1:nturbines) )
	731	ALLOCATE( j_smear(1:nturbines) )
	732	ALLOCATE( k_hub(1:nturbines) )
	733	ALLOCATE( k_smear(1:nturbines) )
	734	ALLOCATE( torque_total(1:nturbines) )
[1912]	735	ALLOCATE( thrust_rotor(1:nturbines) )
[1819]	736
	737	!
	738	!-- Allocation of the 1D arrays for yaw control
	739	ALLOCATE( yawdir(1:nturbines) )
	740	ALLOCATE( u_inflow(1:nturbines) )
	741	ALLOCATE( wdir(1:nturbines) )
	742	ALLOCATE( u_inflow_l(1:nturbines) )
	743	ALLOCATE( wdir_l(1:nturbines) )
	744	ALLOCATE( phi_yaw_l(1:nturbines) )
	745
	746	!
	747	!-- Allocate 1D arrays (dimension = number of rotor segments)
	748	ALLOCATE( alpha_attack(1:nsegs_max) )
	749	ALLOCATE( chord(1:nsegs_max) )
	750	ALLOCATE( phi_rel(1:nsegs_max) )
	751	ALLOCATE( thrust_seg(1:nsegs_max) )
	752	ALLOCATE( torque_seg_y(1:nsegs_max) )
	753	ALLOCATE( torque_seg_z(1:nsegs_max) )
[1839]	754	ALLOCATE( turb_cd(1:nsegs_max) )
	755	ALLOCATE( turb_cl(1:nsegs_max) )
[1819]	756	ALLOCATE( vrel(1:nsegs_max) )
	757	ALLOCATE( vtheta(1:nsegs_max) )
	758
	759	!
	760	!-- Allocate 2D arrays (dimension = number of rotor rings and segments)
	761	ALLOCATE( rbx(1:nrings_max,1:nsegs_max) )
	762	ALLOCATE( rby(1:nrings_max,1:nsegs_max) )
	763	ALLOCATE( rbz(1:nrings_max,1:nsegs_max) )
	764	ALLOCATE( thrust_ring(1:nrings_max,1:nsegs_max) )
	765	ALLOCATE( torque_ring_y(1:nrings_max,1:nsegs_max) )
	766	ALLOCATE( torque_ring_z(1:nrings_max,1:nsegs_max) )
	767
	768	!
	769	!-- Allocate additional 2D arrays
	770	ALLOCATE( rotx(1:nturbines,1:3) )
	771	ALLOCATE( roty(1:nturbines,1:3) )
	772	ALLOCATE( rotz(1:nturbines,1:3) )
	773
	774	!
	775	!-- Allocate 3D arrays (dimension = number of grid points)
[1912]	776	ALLOCATE( nac_cd_surf(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	777	ALLOCATE( rot_tend_x(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	778	ALLOCATE( rot_tend_y(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	779	ALLOCATE( rot_tend_z(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
[1819]	780	ALLOCATE( thrust(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	781	ALLOCATE( torque_y(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	782	ALLOCATE( torque_z(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
[1912]	783	ALLOCATE( tow_cd_surf(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
[1819]	784
	785	!
	786	!-- Allocate additional 3D arrays
	787	ALLOCATE( u_int(1:nturbines,1:nrings_max,1:nsegs_max) )
	788	ALLOCATE( u_int_1_l(1:nturbines,1:nrings_max,1:nsegs_max) )
	789	ALLOCATE( v_int(1:nturbines,1:nrings_max,1:nsegs_max) )
	790	ALLOCATE( v_int_1_l(1:nturbines,1:nrings_max,1:nsegs_max) )
	791	ALLOCATE( w_int(1:nturbines,1:nrings_max,1:nsegs_max) )
	792	ALLOCATE( w_int_1_l(1:nturbines,1:nrings_max,1:nsegs_max) )
	793
	794	!
	795	!-- All of the arrays are initialized with a value of zero:
	796	i_hub(:) = 0
	797	i_smear(:) = 0
	798	j_hub(:) = 0
	799	j_smear(:) = 0
	800	k_hub(:) = 0
	801	k_smear(:) = 0
[1912]	802
[1819]	803	torque_total(:) = 0.0_wp
[1912]	804	thrust_rotor(:) = 0.0_wp
[1819]	805
[2563]	806	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
	807	omega_gen(:) = 0.0_wp
	808	omega_gen_old(:) = 0.0_wp
	809	omega_gen_f(:) = 0.0_wp
	810	omega_gen_f_old(:) = 0.0_wp
	811	pitch_add_old(:) = 0.0_wp
	812	torque_gen(:) = 0.0_wp
	813	torque_gen_old(:) = 0.0_wp
	814	ENDIF
	815
[1819]	816	yawdir(:) = 0.0_wp
[3069]	817	wdir_l(:) = 0.0_wp
[1819]	818	wdir(:) = 0.0_wp
	819	u_inflow(:) = 0.0_wp
[3069]	820	u_inflow_l(:) = 0.0_wp
	821	phi_yaw_l(:) = 0.0_wp
[1819]	822
	823	!
	824	!-- Allocate 1D arrays (dimension = number of rotor segments)
	825	alpha_attack(:) = 0.0_wp
	826	chord(:) = 0.0_wp
	827	phi_rel(:) = 0.0_wp
	828	thrust_seg(:) = 0.0_wp
	829	torque_seg_y(:) = 0.0_wp
	830	torque_seg_z(:) = 0.0_wp
[1864]	831	turb_cd(:) = 0.0_wp
	832	turb_cl(:) = 0.0_wp
[1819]	833	vrel(:) = 0.0_wp
	834	vtheta(:) = 0.0_wp
	835
	836	rbx(:,:) = 0.0_wp
	837	rby(:,:) = 0.0_wp
	838	rbz(:,:) = 0.0_wp
	839	thrust_ring(:,:) = 0.0_wp
	840	torque_ring_y(:,:) = 0.0_wp
	841	torque_ring_z(:,:) = 0.0_wp
	842
	843	rotx(:,:) = 0.0_wp
	844	roty(:,:) = 0.0_wp
	845	rotz(:,:) = 0.0_wp
	846
[1912]	847	nac_cd_surf(:,:,:) = 0.0_wp
	848	rot_tend_x(:,:,:) = 0.0_wp
	849	rot_tend_y(:,:,:) = 0.0_wp
	850	rot_tend_z(:,:,:) = 0.0_wp
[1819]	851	thrust(:,:,:) = 0.0_wp
	852	torque_y(:,:,:) = 0.0_wp
	853	torque_z(:,:,:) = 0.0_wp
[1912]	854	tow_cd_surf(:,:,:) = 0.0_wp
[1819]	855
	856	u_int(:,:,:) = 0.0_wp
	857	u_int_1_l(:,:,:) = 0.0_wp
	858	v_int(:,:,:) = 0.0_wp
	859	v_int_1_l(:,:,:) = 0.0_wp
	860	w_int(:,:,:) = 0.0_wp
	861	w_int_1_l(:,:,:) = 0.0_wp
	862
	863
[1839]	864	END SUBROUTINE wtm_init_arrays
[1819]	865
	866
	867	!------------------------------------------------------------------------------!
	868	! Description:
	869	! ------------
[1839]	870	!> Initialization of the wind turbine model
[1819]	871	!------------------------------------------------------------------------------!
[1839]	872	SUBROUTINE wtm_init
[1819]	873
[1839]	874
[3065]	875	USE control_parameters, &
	876	ONLY: dz_stretch_level_start
	877
[1819]	878	IMPLICIT NONE
	879
	880	INTEGER(iwp) :: i !< running index
	881	INTEGER(iwp) :: j !< running index
	882	INTEGER(iwp) :: k !< running index
[1864]	883
[1819]	884	!
[1864]	885	!-- Help variables for the smearing function
	886	REAL(wp) :: eps_kernel !<
	887
[1839]	888	!
[1864]	889	!-- Help variables for calculation of the tower drag
	890	INTEGER(iwp) :: tower_n !<
	891	INTEGER(iwp) :: tower_s !<
	892
	893	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: circle_points !<
	894
	895	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: index_nacb !<
	896	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: index_nacl !<
	897	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: index_nacr !<
	898	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: index_nact !<
	899
[3885]	900	IF ( debug_output ) CALL debug_message( 'wtm_init', 'start' )
[3685]	901
[1864]	902	ALLOCATE( index_nacb(1:nturbines) )
	903	ALLOCATE( index_nacl(1:nturbines) )
	904	ALLOCATE( index_nacr(1:nturbines) )
	905	ALLOCATE( index_nact(1:nturbines) )
[1819]	906
[1839]	907	!
[1819]	908	!------------------------------------------------------------------------------!
[1839]	909	!-- Calculation of parameters for the regularization kernel
	910	!-- (smearing of the forces)
[1819]	911	!------------------------------------------------------------------------------!
	912	!
[1839]	913	!-- In the following, some of the required parameters for the smearing will
	914	!-- be calculated:
[1819]	915
[1839]	916	!-- The kernel is set equal to twice the grid spacing which has turned out to
	917	!-- be a reasonable value (see e.g. Troldborg et al. (2013), Wind Energy,
[1819]	918	!-- DOI: 10.1002/we.1608):
	919	eps_kernel = 2.0_wp * dx
	920	!
[1839]	921	!-- The zero point (eps_min) of the polynomial function must be the following
	922	!-- if the integral of the polynomial function (for values < eps_min) shall
	923	!-- be equal to the integral of the Gaussian function used before:
	924	eps_min = ( 105.0_wp / 32.0_wp )*( 1.0_wp / 3.0_wp ) &
	925	pi*( 1.0_wp / 6.0_wp ) eps_kernel
[1819]	926	!
[3065]	927	!-- Stretching (non-uniform grid spacing) is not considered in the wind
	928	!-- turbine model. Therefore, vertical stretching has to be applied above
	929	!-- the area where the wtm is active. ABS (...) is required because the
	930	!-- default value of dz_stretch_level_start is -9999999.9_wp (negative).
[3174]	931	IF ( ABS( dz_stretch_level_start(1) ) <= MAXVAL(rcz(1:nturbines)) + &
	932	MAXVAL(rr(1:nturbines)) + &
	933	eps_min) THEN
[3065]	934	WRITE( message_string, * ) 'The lowest level where vertical ', &
	935	'stretching is applied &have to be ', &
[3174]	936	'greater than ',MAXVAL(rcz(1:nturbines)) +&
	937	MAXVAL(rr(1:nturbines)) + eps_min
[3066]	938	CALL message( 'wtm_init', 'PA0484', 1, 2, 0, 6, 0 )
[3065]	939	ENDIF
	940	!
[1819]	941	!-- Square of eps_min:
	942	eps_min2 = eps_min**2
	943	!
	944	!-- Parameters in the polynomial function:
[1864]	945	pol_a = 1.0_wp / eps_min**4
	946	pol_b = 2.0_wp / eps_min**2
[1819]	947	!
[1839]	948	!-- Normalization factor which is the inverse of the integral of the smearing
	949	!-- function:
	950	eps_factor = 105.0_wp / ( 32.0_wp * pi * eps_min**3 )
	951
[1864]	952	!-- Change tilt angle to rad:
	953	tilt = tilt * pi / 180.0_wp
	954
[1819]	955	!
[1864]	956	!-- Change yaw angle to rad:
[2563]	957	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
	958	phi_yaw(:) = phi_yaw(:) * pi / 180.0_wp
	959	ENDIF
[1819]	960
[1864]	961
[1819]	962	DO inot = 1, nturbines
	963	!
[1864]	964	!-- Rotate the rotor coordinates in case yaw and tilt are defined
	965	CALL wtm_rotate_rotor( inot )
[1819]	966
	967	!
	968	!-- Determine the indices of the hub height
	969	i_hub(inot) = INT( rcx(inot) / dx )
	970	j_hub(inot) = INT( ( rcy(inot) + 0.5_wp * dy ) / dy )
[3065]	971	k_hub(inot) = INT( ( rcz(inot) + 0.5_wp * dz(1) ) / dz(1) )
[1819]	972
	973	!
	974	!-- Determining the area to which the smearing of the forces is applied.
[1839]	975	!-- As smearing now is effectively applied only for distances smaller than
	976	!-- eps_min, the smearing area can be further limited and regarded as a
	977	!-- function of eps_min:
[1819]	978	i_smear(inot) = CEILING( ( rr(inot) + eps_min ) / dx )
	979	j_smear(inot) = CEILING( ( rr(inot) + eps_min ) / dy )
[3065]	980	k_smear(inot) = CEILING( ( rr(inot) + eps_min ) / dz(1) )
[1864]	981
[1819]	982	ENDDO
	983
	984	!
[2792]	985	!-- Call the wtm_init_speed_control subroutine and calculate the local
	986	!-- omega_rot for the respective processor.
	987	IF ( speed_control) THEN
	988
[3875]	989	CALL wtm_init_speed_control
[2792]	990
	991	IF ( TRIM( initializing_actions ) == 'read_restart_data' ) THEN
	992
	993	DO inot = 1, nturbines
	994
	995	IF ( nxl > i_hub(inot) ) THEN
	996	torque_gen(inot) = 0.0_wp
	997	omega_gen_f(inot) = 0.0_wp
	998	omega_rot_l(inot) = 0.0_wp
	999	ENDIF
	1000
	1001	IF ( nxr < i_hub(inot) ) THEN
	1002	torque_gen(inot) = 0.0_wp
	1003	omega_gen_f(inot) = 0.0_wp
	1004	omega_rot_l(inot) = 0.0_wp
	1005	ENDIF
	1006
	1007	IF ( nys > j_hub(inot) ) THEN
	1008	torque_gen(inot) = 0.0_wp
	1009	omega_gen_f(inot) = 0.0_wp
	1010	omega_rot_l(inot) = 0.0_wp
	1011	ENDIF
	1012
	1013	IF ( nyn < j_hub(inot) ) THEN
	1014	torque_gen(inot) = 0.0_wp
	1015	omega_gen_f(inot) = 0.0_wp
	1016	omega_rot_l(inot) = 0.0_wp
	1017	ENDIF
	1018
	1019	IF ( ( nxl <= i_hub(inot) ) .AND. ( nxr >= i_hub(inot) ) ) THEN
	1020	IF ( ( nys <= j_hub(inot) ) .AND. ( nyn >= j_hub(inot) ) ) THEN
	1021
	1022	omega_rot_l(inot) = omega_gen(inot) / gear_ratio
	1023
	1024	ENDIF
	1025	ENDIF
	1026
	1027	END DO
	1028
	1029	ENDIF
	1030
	1031	ENDIF
	1032
	1033	!
[1819]	1034	!------------------------------------------------------------------------------!
[1839]	1035	!-- Determine the area within each grid cell that overlaps with the area
	1036	!-- of the nacelle and the tower (needed for calculation of the forces)
[1819]	1037	!------------------------------------------------------------------------------!
	1038	!
	1039	!-- Note: so far this is only a 2D version, in that the mean flow is
	1040	!-- perpendicular to the rotor area.
	1041
	1042	!
	1043	!-- Allocation of the array containing information on the intersection points
	1044	!-- between rotor disk and the numerical grid:
	1045	upper_end = ( ny + 1 ) * 10000
	1046
	1047	ALLOCATE( circle_points(1:2,1:upper_end) )
[1839]	1048
	1049	circle_points(:,:) = 0.0_wp
[1819]	1050
[1839]	1051
	1052	DO inot = 1, nturbines ! loop over number of turbines
[1819]	1053	!
[1839]	1054	!-- Determine the grid index (u-grid) that corresponds to the location of
	1055	!-- the rotor center (reduces the amount of calculations in the case that
	1056	!-- the mean flow is perpendicular to the rotor area):
[1819]	1057	i = i_hub(inot)
	1058
	1059	!
[1839]	1060	!-- Determine the left and the right edge of the nacelle (corresponding
	1061	!-- grid point indices):
[1819]	1062	index_nacl(inot) = INT( ( rcy(inot) - rnac(inot) + 0.5_wp * dy ) / dy )
	1063	index_nacr(inot) = INT( ( rcy(inot) + rnac(inot) + 0.5_wp * dy ) / dy )
	1064	!
[1839]	1065	!-- Determine the bottom and the top edge of the nacelle (corresponding
	1066	!-- grid point indices).The grid point index has to be increased by 1, as
	1067	!-- the first level for the u-component (index 0) is situated below the
	1068	!-- surface. All points between z=0 and z=dz/s would already be contained
	1069	!-- in grid box 1.
[3065]	1070	index_nacb(inot) = INT( ( rcz(inot) - rnac(inot) ) / dz(1) ) + 1
	1071	index_nact(inot) = INT( ( rcz(inot) + rnac(inot) ) / dz(1) ) + 1
[1819]	1072
	1073	!
	1074	!-- Determine the indices of the grid boxes containing the left and
[1864]	1075	!-- the right boundaries of the tower:
[1819]	1076	tower_n = ( rcy(inot) + 0.5_wp * dtow(inot) - 0.5_wp * dy ) / dy
	1077	tower_s = ( rcy(inot) - 0.5_wp * dtow(inot) - 0.5_wp * dy ) / dy
	1078
	1079	!
	1080	!-- Determine the fraction of the grid box area overlapping with the tower
[1864]	1081	!-- area and multiply it with the drag of the tower:
[1839]	1082	IF ( ( nxlg <= i ) .AND. ( nxrg >= i ) ) THEN
[1819]	1083
	1084	DO j = nys, nyn
	1085	!
[1839]	1086	!-- Loop from south to north boundary of tower
	1087	IF ( ( j >= tower_s ) .AND. ( j <= tower_n ) ) THEN
	1088
[1819]	1089	DO k = nzb, nzt
	1090
	1091	IF ( k == k_hub(inot) ) THEN
	1092	IF ( tower_n - tower_s >= 1 ) THEN
[1839]	1093	!
[1819]	1094	!-- leftmost and rightmost grid box:
	1095	IF ( j == tower_s ) THEN
[1912]	1096	tow_cd_surf(k,j,i) = ( rcz(inot) - &
[3065]	1097	( k_hub(inot) * dz(1) - 0.5_wp * dz(1) ) )*& ! extension in z-direction
[1912]	1098	( ( tower_s + 1.0_wp + 0.5_wp ) * dy - &
	1099	( rcy(inot) - 0.5_wp * dtow(inot) ) ) * & ! extension in y-direction
	1100	turb_cd_tower(inot)
[1819]	1101	ELSEIF ( j == tower_n ) THEN
[1912]	1102	tow_cd_surf(k,j,i) = ( rcz(inot) - &
[3065]	1103	( k_hub(inot) * dz(1) - 0.5_wp * dz(1) ) )*& ! extension in z-direction
[1912]	1104	( ( rcy(inot) + 0.5_wp * dtow(inot) ) - &
	1105	( tower_n + 0.5_wp ) * dy ) * & ! extension in y-direction
	1106	turb_cd_tower(inot)
[1819]	1107	!
	1108	!-- grid boxes inbetween
[1912]	1109	!-- (where tow_cd_surf = grid box area):
[1819]	1110	ELSE
[1912]	1111	tow_cd_surf(k,j,i) = ( rcz(inot) - &
[3065]	1112	( k_hub(inot) * dz(1) - 0.5_wp * dz(1) ) )*&
[1912]	1113	dy * turb_cd_tower(inot)
[1819]	1114	ENDIF
	1115	!
	1116	!-- tower lies completely within one grid box:
	1117	ELSE
[3065]	1118	tow_cd_surf(k,j,i) = ( rcz(inot) - ( k_hub(inot) * &
	1119	dz(1) - 0.5_wp * dz(1) ) ) * &
[1912]	1120	dtow(inot) * turb_cd_tower(inot)
[1819]	1121	ENDIF
[1839]	1122	!
	1123	!-- In case that k is smaller than k_hub the following actions
	1124	!-- are carried out:
[1819]	1125	ELSEIF ( k < k_hub(inot) ) THEN
	1126
[1839]	1127	IF ( ( tower_n - tower_s ) >= 1 ) THEN
	1128	!
[1819]	1129	!-- leftmost and rightmost grid box:
	1130	IF ( j == tower_s ) THEN
[3065]	1131	tow_cd_surf(k,j,i) = dz(1) * ( &
[1839]	1132	( tower_s + 1 + 0.5_wp ) * dy - &
	1133	( rcy(inot) - 0.5_wp * dtow(inot) ) &
[1912]	1134	) * turb_cd_tower(inot)
[1819]	1135	ELSEIF ( j == tower_n ) THEN
[3065]	1136	tow_cd_surf(k,j,i) = dz(1) * ( &
[1839]	1137	( rcy(inot) + 0.5_wp * dtow(inot) ) - &
	1138	( tower_n + 0.5_wp ) * dy &
[1912]	1139	) * turb_cd_tower(inot)
[1839]	1140	!
	1141	!-- grid boxes inbetween
[1912]	1142	!-- (where tow_cd_surf = grid box area):
[1819]	1143	ELSE
[3065]	1144	tow_cd_surf(k,j,i) = dz(1) * dy * &
	1145	turb_cd_tower(inot)
[1819]	1146	ENDIF
[1839]	1147	!
[1819]	1148	!-- tower lies completely within one grid box:
	1149	ELSE
[3065]	1150	tow_cd_surf(k,j,i) = dz(1) * dtow(inot) * &
[1912]	1151	turb_cd_tower(inot)
[1839]	1152	ENDIF ! end if larger than grid box
	1153
	1154	ENDIF ! end if k == k_hub
	1155
	1156	ENDDO ! end loop over k
	1157
	1158	ENDIF ! end if inside north and south boundary of tower
	1159
	1160	ENDDO ! end loop over j
	1161
	1162	ENDIF ! end if hub inside domain + ghostpoints
[1819]	1163
[1839]	1164
[1912]	1165	CALL exchange_horiz( tow_cd_surf, nbgp )
[1819]	1166
[1839]	1167	!
[1864]	1168	!-- Calculation of the nacelle area
	1169	!-- CAUTION: Currently disabled due to segmentation faults on the FLOW HPC
	1170	!-- cluster (Oldenburg)
	1171	!!
	1172	!!-- Tabulate the points on the circle that are required in the following for
	1173	!!-- the calculation of the Riemann integral (node points; they are called
	1174	!!-- circle_points in the following):
	1175	!
	1176	! dy_int = dy / 10000.0_wp
	1177	!
	1178	! DO i_ip = 1, upper_end
	1179	! yvalue = dy_int * ( i_ip - 0.5_wp ) + 0.5_wp * dy !<--- segmentation fault
	1180	! sqrt_arg = rnac(inot)2 - ( yvalue - rcy(inot) )2 !<--- segmentation fault
	1181	! IF ( sqrt_arg >= 0.0_wp ) THEN
	1182	!!
	1183	!!-- bottom intersection point
	1184	! circle_points(1,i_ip) = rcz(inot) - SQRT( sqrt_arg )
	1185	!!
	1186	!!-- top intersection point
	1187	! circle_points(2,i_ip) = rcz(inot) + SQRT( sqrt_arg ) !<--- segmentation fault
	1188	! ELSE
	1189	! circle_points(:,i_ip) = -111111 !<--- segmentation fault
	1190	! ENDIF
	1191	! ENDDO
	1192	!
	1193	!
	1194	! DO j = nys, nyn
	1195	!!
	1196	!!-- In case that the grid box is located completely outside the nacelle
	1197	!!-- (y) it can automatically be stated that there is no overlap between
	1198	!!-- the grid box and the nacelle and consequently we can set
[1912]	1199	!!-- nac_cd_surf(:,j,i) = 0.0:
[1864]	1200	! IF ( ( j >= index_nacl(inot) ) .AND. ( j <= index_nacr(inot) ) ) THEN
	1201	! DO k = nzb+1, nzt
	1202	!!
	1203	!!-- In case that the grid box is located completely outside the
	1204	!!-- nacelle (z) it can automatically be stated that there is no
	1205	!!-- overlap between the grid box and the nacelle and consequently
[1912]	1206	!!-- we can set nac_cd_surf(k,j,i) = 0.0:
[1864]	1207	! IF ( ( k >= index_nacb(inot) ) .OR. &
	1208	! ( k <= index_nact(inot) ) ) THEN
	1209	!!
	1210	!!-- For all other cases Riemann integrals are calculated.
	1211	!!-- Here, the points on the circle that have been determined
	1212	!!-- above are used in order to calculate the overlap between the
	1213	!!-- gridbox and the nacelle area (area approached by 10000
	1214	!!-- rectangulars dz_int * dy_int):
	1215	! DO i_ipg = 1, 10000
	1216	! dz_int = dz
	1217	! i_ip = j * 10000 + i_ipg
	1218	!!
	1219	!!-- Determine the vertical extension dz_int of the circle
	1220	!!-- within the current grid box:
	1221	! IF ( ( circle_points(2,i_ip) < zw(k) ) .AND. & !<--- segmentation fault
	1222	! ( circle_points(2,i_ip) >= zw(k-1) ) ) THEN
	1223	! dz_int = dz_int - & !<--- segmentation fault
	1224	! ( zw(k) - circle_points(2,i_ip) )
	1225	! ENDIF
	1226	! IF ( ( circle_points(1,i_ip) <= zw(k) ) .AND. & !<--- segmentation fault
	1227	! ( circle_points(1,i_ip) > zw(k-1) ) ) THEN
	1228	! dz_int = dz_int - &
	1229	! ( circle_points(1,i_ip) - zw(k-1) )
	1230	! ENDIF
	1231	! IF ( zw(k-1) > circle_points(2,i_ip) ) THEN
	1232	! dz_int = 0.0_wp
	1233	! ENDIF
	1234	! IF ( zw(k) < circle_points(1,i_ip) ) THEN
	1235	! dz_int = 0.0_wp
	1236	! ENDIF
	1237	! IF ( ( nxlg <= i ) .AND. ( nxrg >= i ) ) THEN
[1912]	1238	! nac_cd_surf(k,j,i) = nac_cd_surf(k,j,i) + & !<--- segmentation fault
	1239	! dy_int * dz_int * turb_cd_nacelle(inot)
[1864]	1240	! ENDIF
	1241	! ENDDO
	1242	! ENDIF
	1243	! ENDDO
	1244	! ENDIF
[1819]	1245	!
[1864]	1246	! ENDDO
[1819]	1247	!
[1912]	1248	! CALL exchange_horiz( nac_cd_surf, nbgp ) !<--- segmentation fault
[1819]	1249
[1864]	1250	ENDDO ! end of loop over turbines
[1819]	1251
[3065]	1252	tow_cd_surf = tow_cd_surf / ( dx * dy * dz(1) ) ! Normalize tower drag
	1253	nac_cd_surf = nac_cd_surf / ( dx * dy * dz(1) ) ! Normalize nacelle drag
[1819]	1254
[1912]	1255	CALL wtm_read_blade_tables
[3685]	1256
[3885]	1257	IF ( debug_output ) CALL debug_message( 'wtm_init', 'end' )
[1839]	1258
[1864]	1259	END SUBROUTINE wtm_init
	1260
	1261
[1819]	1262	!------------------------------------------------------------------------------!
[1864]	1263	! Description:
	1264	! ------------
	1265	!> Read in layout of the rotor blade , the lift and drag tables
	1266	!> and the distribution of lift and drag tables along the blade
[1819]	1267	!------------------------------------------------------------------------------!
[1912]	1268	!
	1269	SUBROUTINE wtm_read_blade_tables
[1819]	1270
[1839]	1271
[1864]	1272	IMPLICIT NONE
	1273
	1274	INTEGER(iwp) :: ii !< running index
	1275	INTEGER(iwp) :: jj !< running index
[1843]	1276
[1864]	1277	INTEGER(iwp) :: ierrn !<
	1278
	1279	CHARACTER(200) :: chmess !< Read in string
[1839]	1280
[1864]	1281	INTEGER(iwp) :: dlen !< no. rows of local table
	1282	INTEGER(iwp) :: dlenbl !< no. rows of cd, cl table
	1283	INTEGER(iwp) :: ialpha !< table position of current alpha value
	1284	INTEGER(iwp) :: iialpha !<
	1285	INTEGER(iwp) :: iir !<
	1286	INTEGER(iwp) :: radres !< radial resolution
	1287	INTEGER(iwp) :: t1 !< no. of airfoil
	1288	INTEGER(iwp) :: t2 !< no. of airfoil
	1289	INTEGER(iwp) :: trow !<
	1290	INTEGER(iwp) :: dlenbl_int !< no. rows of interpolated cd, cl tables
[1839]	1291
[1864]	1292	REAL(wp) :: alpha_attack_i !<
	1293	REAL(wp) :: weight_a !<
	1294	REAL(wp) :: weight_b !<
[1839]	1295
[1864]	1296	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: ttoint1 !<
	1297	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: ttoint2 !<
[1839]	1298
[1864]	1299	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cd_sel1 !<
	1300	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cd_sel2 !<
	1301	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cl_sel1 !<
	1302	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cl_sel2 !<
	1303	REAL(wp), DIMENSION(:), ALLOCATABLE :: read_cl_cd !< read in var array
[1839]	1304
[1864]	1305	REAL(wp), DIMENSION(:), ALLOCATABLE :: alpha_attack_tab !<
	1306	REAL(wp), DIMENSION(:), ALLOCATABLE :: trad1 !<
	1307	REAL(wp), DIMENSION(:), ALLOCATABLE :: trad2 !<
	1308	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: turb_cd_table !<
	1309	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: turb_cl_table !<
[1839]	1310
[1864]	1311	ALLOCATE ( read_cl_cd(1:2*nairfoils+1) )
[1839]	1312
[1864]	1313	!
	1314	!-- Read in the distribution of lift and drag tables along the blade, the
	1315	!-- layout of the rotor blade and the lift and drag tables:
	1316
[2323]	1317	OPEN ( 90, FILE='WTM_DATA', STATUS='OLD', FORM='FORMATTED', IOSTAT=ierrn )
[1864]	1318
	1319	IF ( ierrn /= 0 ) THEN
	1320	message_string = 'file WTM_DATA does not exist'
[2322]	1321	CALL message( 'wtm_init', 'PA0464', 1, 2, 0, 6, 0 )
[1864]	1322	ENDIF
	1323	!
	1324	!-- Read distribution table:
	1325
	1326	dlen = 0
	1327
[2323]	1328	READ ( 90, '(3/)' )
[1864]	1329
	1330	rloop3: DO
[2323]	1331	READ ( 90, *, IOSTAT=ierrn ) chmess
[1864]	1332	IF ( ierrn < 0 .OR. chmess == '#' .OR. chmess == '') EXIT rloop3
	1333	dlen = dlen + 1
	1334	ENDDO rloop3
	1335
	1336	ALLOCATE( trad1(1:dlen), trad2(1:dlen), ttoint1(1:dlen), ttoint2(1:dlen))
	1337
	1338	DO jj = 1,dlen+1
[2323]	1339	BACKSPACE ( 90, IOSTAT=ierrn )
[1864]	1340	ENDDO
	1341
	1342	DO jj = 1,dlen
[2323]	1343	READ ( 90, * ) trad1(jj), trad2(jj), ttoint1(jj), ttoint2(jj)
[1864]	1344	ENDDO
	1345
	1346	!
	1347	!-- Read layout table:
	1348
[1839]	1349	dlen = 0
[1864]	1350
[2323]	1351	READ ( 90, '(3/)')
[1864]	1352
[1843]	1353	rloop1: DO
[2323]	1354	READ ( 90, *, IOSTAT=ierrn ) chmess
[1864]	1355	IF ( ierrn < 0 .OR. chmess == '#' .OR. chmess == '') EXIT rloop1
	1356	dlen = dlen + 1
[1843]	1357	ENDDO rloop1
[1864]	1358
[1839]	1359	ALLOCATE( lrd(1:dlen), ard(1:dlen), crd(1:dlen) )
[1864]	1360	DO jj = 1, dlen+1
[2323]	1361	BACKSPACE ( 90, IOSTAT=ierrn )
[1864]	1362	ENDDO
	1363	DO jj = 1, dlen
[2323]	1364	READ ( 90, * ) lrd(jj), ard(jj), crd(jj)
[1839]	1365	ENDDO
[1819]	1366
[1864]	1367	!
	1368	!-- Read tables (turb_cl(alpha),turb_cd(alpha) for the different profiles:
[1819]	1369
[1864]	1370	dlen = 0
	1371
[2323]	1372	READ ( 90, '(3/)' )
[1864]	1373
[1843]	1374	rloop2: DO
[2323]	1375	READ ( 90, *, IOSTAT=ierrn ) chmess
[1864]	1376	IF ( ierrn < 0 .OR. chmess == '#' .OR. chmess == '') EXIT rloop2
	1377	dlen = dlen + 1
	1378	ENDDO rloop2
	1379
[1912]	1380	ALLOCATE( alpha_attack_tab(1:dlen), turb_cl_table(1:dlen,1:nairfoils), &
[1864]	1381	turb_cd_table(1:dlen,1:nairfoils) )
	1382
	1383	DO jj = 1,dlen+1
[2323]	1384	BACKSPACE ( 90, IOSTAT=ierrn )
[1864]	1385	ENDDO
	1386
[1839]	1387	DO jj = 1,dlen
[2323]	1388	READ ( 90, * ) read_cl_cd
[1864]	1389	alpha_attack_tab(jj) = read_cl_cd(1)
	1390	DO ii= 1, nairfoils
	1391	turb_cl_table(jj,ii) = read_cl_cd(ii*2)
	1392	turb_cd_table(jj,ii) = read_cl_cd(ii*2+1)
[1819]	1393	ENDDO
[1864]	1394
[1839]	1395	ENDDO
[1864]	1396
	1397	dlenbl = dlen
	1398
[2323]	1399	CLOSE ( 90 )
[1819]	1400
[1864]	1401	!
[2836]	1402	!-- For each possible radial position (resolution: 0.1 m --> 631 values if rr(1)=63m)
	1403	!-- and each possible angle of attack (resolution: 0.1 degrees --> 3601 values!)
[1864]	1404	!-- determine the lift and drag coefficient by interpolating between the
	1405	!-- tabulated values of each table (interpolate to current angle of attack)
	1406	!-- and between the tables (interpolate to current radial position):
[1839]	1407
[2836]	1408	ALLOCATE( turb_cl_sel1(1:dlenbl) )
	1409	ALLOCATE( turb_cl_sel2(1:dlenbl) )
	1410	ALLOCATE( turb_cd_sel1(1:dlenbl) )
	1411	ALLOCATE( turb_cd_sel2(1:dlenbl) )
[1819]	1412
[1864]	1413	radres = INT( rr(1) * 10.0_wp ) + 1_iwp
	1414	dlenbl_int = INT( 360.0_wp / accu_cl_cd_tab ) + 1_iwp
[1839]	1415
[2836]	1416	ALLOCATE( turb_cl_tab(1:dlenbl_int,1:radres) )
	1417	ALLOCATE( turb_cd_tab(1:dlenbl_int,1:radres) )
[1864]	1418
[2836]	1419	DO iir = 1, radres ! loop over radius
[1864]	1420
[2836]	1421	cur_r = ( iir - 1_iwp ) * 0.1_wp
	1422	!
	1423	!-- Find position in table 1
	1424	lct = MINLOC( ABS( trad1 - cur_r ) )
	1425	! lct(1) = lct(1)
[1864]	1426
[4144]	1427	IF ( ( trad1(lct(1)) - cur_r ) > 0.0 ) THEN
[2836]	1428	lct(1) = lct(1) - 1
	1429	ENDIF
[1864]	1430
[2836]	1431	trow = lct(1)
	1432	!
	1433	!-- Calculate weights for radius interpolation
	1434	weight_a = ( trad2(trow) - cur_r ) / ( trad2(trow) - trad1(trow) )
	1435	weight_b = ( cur_r - trad1(trow) ) / ( trad2(trow) - trad1(trow) )
	1436	t1 = ttoint1(trow)
	1437	t2 = ttoint2(trow)
[1864]	1438
[4144]	1439	IF ( t1 == t2 ) THEN ! if both are the same, the weights are NaN
	1440	weight_a = 0.5_wp ! then do interpolate in between same twice
	1441	weight_b = 0.5_wp ! using 0.5 as weight
[2836]	1442	ENDIF
	1443
	1444	IF ( t1 == 0 .AND. t2 == 0 ) THEN
	1445	turb_cd_sel1 = 0.0_wp
	1446	turb_cd_sel2 = 0.0_wp
	1447	turb_cl_sel1 = 0.0_wp
	1448	turb_cl_sel2 = 0.0_wp
	1449
[3593]	1450	turb_cd_tab(1,iir) = 0.0_wp ! For -180 degrees (iialpha=1) the values
[2836]	1451	turb_cl_tab(1,iir) = 0.0_wp ! for each radius has to be set
	1452	! explicitly
	1453	ELSE
	1454	turb_cd_sel1 = turb_cd_table(:,t1)
	1455	turb_cd_sel2 = turb_cd_table(:,t2)
	1456	turb_cl_sel1 = turb_cl_table(:,t1)
	1457	turb_cl_sel2 = turb_cl_table(:,t2)
	1458	!
[3593]	1459	!-- For -180 degrees (iialpha=1) the values for each radius has to be set
[2836]	1460	!-- explicitly
	1461	turb_cd_tab(1,iir) = ( weight_a * turb_cd_table(1,t1) + weight_b &
	1462	* turb_cd_table(1,t2) )
	1463	turb_cl_tab(1,iir) = ( weight_a * turb_cl_table(1,t1) + weight_b &
	1464	* turb_cl_table(1,t2) )
	1465	ENDIF
	1466
	1467	DO iialpha = 2, dlenbl_int ! loop over angles
	1468
[1864]	1469	alpha_attack_i = -180.0_wp + REAL( iialpha-1 ) * accu_cl_cd_tab
	1470	ialpha = 1
[2836]	1471
[4343]	1472	DO WHILE ( ( alpha_attack_i > alpha_attack_tab(ialpha) ) .AND. (ialpha < dlen ) )
[1864]	1473	ialpha = ialpha + 1
	1474	ENDDO
[1819]	1475
[1864]	1476	!
[1912]	1477	!-- Interpolation of lift and drag coefficiencts on fine grid of radius
	1478	!-- segments and angles of attack
[3182]	1479
[1912]	1480	turb_cl_tab(iialpha,iir) = ( alpha_attack_tab(ialpha) - &
	1481	alpha_attack_i ) / &
[1864]	1482	( alpha_attack_tab(ialpha) - &
	1483	alpha_attack_tab(ialpha-1) ) * &
	1484	( weight_a * turb_cl_sel1(ialpha-1) + &
	1485	weight_b * turb_cl_sel2(ialpha-1) ) +&
	1486	( alpha_attack_i - &
	1487	alpha_attack_tab(ialpha-1) ) / &
	1488	( alpha_attack_tab(ialpha) - &
	1489	alpha_attack_tab(ialpha-1) ) * &
	1490	( weight_a * turb_cl_sel1(ialpha) + &
	1491	weight_b * turb_cl_sel2(ialpha) )
[1912]	1492	turb_cd_tab(iialpha,iir) = ( alpha_attack_tab(ialpha) - &
	1493	alpha_attack_i ) / &
[1864]	1494	( alpha_attack_tab(ialpha) - &
	1495	alpha_attack_tab(ialpha-1) ) * &
	1496	( weight_a * turb_cd_sel1(ialpha-1) + &
	1497	weight_b * turb_cd_sel2(ialpha-1) ) +&
	1498	( alpha_attack_i - &
	1499	alpha_attack_tab(ialpha-1) ) / &
	1500	( alpha_attack_tab(ialpha) - &
	1501	alpha_attack_tab(ialpha-1) ) * &
	1502	( weight_a * turb_cd_sel1(ialpha) + &
	1503	weight_b * turb_cd_sel2(ialpha) )
[2836]	1504
[1912]	1505	ENDDO ! end loop over angles of attack
[2836]	1506
	1507	ENDDO ! end loop over radius
[1819]	1508
[2836]	1509
[1912]	1510	END SUBROUTINE wtm_read_blade_tables
[1819]	1511
	1512
[1864]	1513	!------------------------------------------------------------------------------!
	1514	! Description:
	1515	! ------------
	1516	!> The projection matrix for the coordinate system of therotor disc in respect
	1517	!> to the yaw and tilt angle of the rotor is calculated
	1518	!------------------------------------------------------------------------------!
	1519	SUBROUTINE wtm_rotate_rotor( inot )
[1819]	1520
[1864]	1521
	1522	IMPLICIT NONE
	1523
	1524	INTEGER(iwp) :: inot
	1525	!
	1526	!-- Calculation of the rotation matrix for the application of the tilt to
	1527	!-- the rotors
	1528	rot_eigen_rad(1) = SIN( phi_yaw(inot) ) ! x-component of the radial eigenvector
	1529	rot_eigen_rad(2) = COS( phi_yaw(inot) ) ! y-component of the radial eigenvector
	1530	rot_eigen_rad(3) = 0.0_wp ! z-component of the radial eigenvector
	1531
	1532	rot_eigen_azi(1) = 0.0_wp ! x-component of the azimuth eigenvector
	1533	rot_eigen_azi(2) = 0.0_wp ! y-component of the azimuth eigenvector
	1534	rot_eigen_azi(3) = 1.0_wp ! z-component of the azimuth eigenvector
	1535
	1536	rot_eigen_nor(1) = COS( phi_yaw(inot) ) ! x-component of the normal eigenvector
	1537	rot_eigen_nor(2) = -SIN( phi_yaw(inot) ) ! y-component of the normal eigenvector
	1538	rot_eigen_nor(3) = 0.0_wp ! z-component of the normal eigenvector
[1839]	1539
[1864]	1540	!
	1541	!-- Calculation of the coordinate transformation matrix to apply a tilt to
	1542	!-- the rotor. If tilt = 0, rot_coord_trans is a unit matrix.
[1819]	1543
[1912]	1544	rot_coord_trans(inot,1,1) = rot_eigen_rad(1)*2 &
[1864]	1545	( 1.0_wp - COS( tilt ) ) + COS( tilt )
[1912]	1546	rot_coord_trans(inot,1,2) = rot_eigen_rad(1) * rot_eigen_rad(2) * &
	1547	( 1.0_wp - COS( tilt ) ) - &
[1864]	1548	rot_eigen_rad(3) * SIN( tilt )
[1912]	1549	rot_coord_trans(inot,1,3) = rot_eigen_rad(1) * rot_eigen_rad(3) * &
	1550	( 1.0_wp - COS( tilt ) ) + &
[1864]	1551	rot_eigen_rad(2) * SIN( tilt )
[1912]	1552	rot_coord_trans(inot,2,1) = rot_eigen_rad(2) * rot_eigen_rad(1) * &
	1553	( 1.0_wp - COS( tilt ) ) + &
[1864]	1554	rot_eigen_rad(3) * SIN( tilt )
[1912]	1555	rot_coord_trans(inot,2,2) = rot_eigen_rad(2)*2 &
[1864]	1556	( 1.0_wp - COS( tilt ) ) + COS( tilt )
[1912]	1557	rot_coord_trans(inot,2,3) = rot_eigen_rad(2) * rot_eigen_rad(3) * &
	1558	( 1.0_wp - COS( tilt ) ) - &
[1864]	1559	rot_eigen_rad(1) * SIN( tilt )
[1912]	1560	rot_coord_trans(inot,3,1) = rot_eigen_rad(3) * rot_eigen_rad(1) * &
	1561	( 1.0_wp - COS( tilt ) ) - &
[1864]	1562	rot_eigen_rad(2) * SIN( tilt )
[1912]	1563	rot_coord_trans(inot,3,2) = rot_eigen_rad(3) * rot_eigen_rad(2) * &
	1564	( 1.0_wp - COS( tilt ) ) + &
[1864]	1565	rot_eigen_rad(1) * SIN( tilt )
[1912]	1566	rot_coord_trans(inot,3,3) = rot_eigen_rad(3)*2 &
[1864]	1567	( 1.0_wp - COS( tilt ) ) + COS( tilt )
[1839]	1568
[1864]	1569	!
	1570	!-- Vectors for the Transformation of forces from the rotor's spheric
	1571	!-- coordinate system to the cartesian coordinate system
	1572	rotx(inot,:) = MATMUL( rot_coord_trans(inot,:,:), rot_eigen_nor )
	1573	roty(inot,:) = MATMUL( rot_coord_trans(inot,:,:), rot_eigen_rad )
	1574	rotz(inot,:) = MATMUL( rot_coord_trans(inot,:,:), rot_eigen_azi )
	1575
	1576	END SUBROUTINE wtm_rotate_rotor
[1839]	1577
	1578
[1819]	1579	!------------------------------------------------------------------------------!
	1580	! Description:
	1581	! ------------
[1839]	1582	!> Calculation of the forces generated by the wind turbine
[1819]	1583	!------------------------------------------------------------------------------!
	1584	SUBROUTINE wtm_forces
	1585
[1864]	1586
[1819]	1587	IMPLICIT NONE
	1588
[2669]	1589	CHARACTER (LEN=4) :: turbine_id
[1819]	1590
[1839]	1591	INTEGER(iwp) :: i, j, k !< loop indices
	1592	INTEGER(iwp) :: inot !< turbine loop index (turbine id)
	1593	INTEGER(iwp) :: iialpha, iir !<
[3241]	1594	INTEGER(iwp) :: rseg !<
	1595	INTEGER(iwp) :: ring !<
[1839]	1596	INTEGER(iwp) :: ii, jj, kk !<
[1912]	1597
[2232]	1598	REAL(wp) :: flag !< flag to mask topography grid points
[1839]	1599	REAL(wp) :: sin_rot, cos_rot !<
	1600	REAL(wp) :: sin_yaw, cos_yaw !<
[1912]	1601
	1602	REAL(wp) :: aa, bb, cc, dd !< interpolation distances
	1603	REAL(wp) :: gg !< interpolation volume var
	1604
	1605	REAL(wp) :: dist_u_3d, dist_v_3d, dist_w_3d !< smearing distances
	1606
	1607
[1839]	1608	!
[1819]	1609	! Variables for pitch control
[3241]	1610	LOGICAL :: pitch_sw = .FALSE.
[1839]	1611
[3241]	1612	INTEGER(iwp), DIMENSION(1) :: lct = 0
	1613	REAL(wp), DIMENSION(1) :: rad_d = 0.0_wp
[2152]	1614
	1615	REAL(wp) :: tl_factor !< factor for tip loss correction
[1819]	1616
	1617
[1864]	1618	CALL cpu_log( log_point_s(61), 'wtm_forces', 'start' )
[1819]	1619
	1620
	1621	IF ( simulated_time >= time_turbine_on ) THEN
	1622
[1864]	1623	!
[1819]	1624	!-- Set forces to zero for each new time step:
	1625	thrust(:,:,:) = 0.0_wp
	1626	torque_y(:,:,:) = 0.0_wp
	1627	torque_z(:,:,:) = 0.0_wp
	1628	torque_total(:) = 0.0_wp
[1912]	1629	rot_tend_x(:,:,:) = 0.0_wp
	1630	rot_tend_y(:,:,:) = 0.0_wp
	1631	rot_tend_z(:,:,:) = 0.0_wp
	1632	thrust_rotor(:) = 0.0_wp
[1819]	1633	!
	1634	!-- Loop over number of turbines:
	1635	DO inot = 1, nturbines
	1636
	1637	cos_yaw = COS(phi_yaw(inot))
	1638	sin_yaw = SIN(phi_yaw(inot))
	1639	!
[1839]	1640	!-- Loop over rings of each turbine:
[3832]	1641
	1642	!$OMP PARALLEL PRIVATE (ring, rseg, thrust_seg, torque_seg_y, torque_seg_z, sin_rot, &
	1643	!$OMP& cos_rot, re, rbx, rby, rbz, ii, jj, kk, aa, bb, cc, dd, gg)
	1644	!$OMP DO
[1819]	1645	DO ring = 1, nrings(inot)
	1646
	1647	thrust_seg(:) = 0.0_wp
	1648	torque_seg_y(:) = 0.0_wp
	1649	torque_seg_z(:) = 0.0_wp
	1650	!
	1651	!-- Determine distance between each ring (center) and the hub:
	1652	cur_r = (ring - 0.5_wp) * delta_r(inot)
	1653
	1654	!
[1839]	1655	!-- Loop over segments of each ring of each turbine:
[1819]	1656	DO rseg = 1, nsegs(ring,inot)
	1657	!
[1864]	1658	!-- !-----------------------------------------------------------!
	1659	!-- !-- Determine coordinates of the ring segments --!
	1660	!-- !-----------------------------------------------------------!
[1819]	1661	!
[1864]	1662	!-- Determine angle of ring segment towards zero degree angle of
	1663	!-- rotor system (at zero degree rotor direction vectors aligned
	1664	!-- with y-axis):
[1819]	1665	phi_rotor = rseg * 2.0_wp * pi / nsegs(ring,inot)
	1666	cos_rot = COS( phi_rotor )
	1667	sin_rot = SIN( phi_rotor )
	1668
[1864]	1669	!-- Now the direction vectors can be determined with respect to
	1670	!-- the yaw and tilt angle:
[1819]	1671	re(1) = cos_rot * sin_yaw
[1839]	1672	re(2) = cos_rot * cos_yaw
[1819]	1673	re(3) = sin_rot
	1674
	1675	rote = MATMUL( rot_coord_trans(inot,:,:), re )
	1676	!
	1677	!-- Coordinates of the single segments (center points):
	1678	rbx(ring,rseg) = rcx(inot) + cur_r * rote(1)
	1679	rby(ring,rseg) = rcy(inot) + cur_r * rote(2)
	1680	rbz(ring,rseg) = rcz(inot) + cur_r * rote(3)
	1681
[1864]	1682	!-- !-----------------------------------------------------------!
	1683	!-- !-- Interpolation of the velocity components from the --!
	1684	!-- !-- cartesian grid point to the coordinates of each ring --!
	1685	!-- !-- segment (follows a method used in the particle model) --!
	1686	!-- !-----------------------------------------------------------!
[1819]	1687
	1688	u_int(inot,ring,rseg) = 0.0_wp
	1689	u_int_1_l(inot,ring,rseg) = 0.0_wp
	1690
	1691	v_int(inot,ring,rseg) = 0.0_wp
	1692	v_int_1_l(inot,ring,rseg) = 0.0_wp
	1693
	1694	w_int(inot,ring,rseg) = 0.0_wp
	1695	w_int_1_l(inot,ring,rseg) = 0.0_wp
	1696
	1697	!
	1698	!-- Interpolation of the u-component:
	1699
	1700	ii = rbx(ring,rseg) * ddx
	1701	jj = ( rby(ring,rseg) - 0.5_wp * dy ) * ddy
[3065]	1702	kk = ( rbz(ring,rseg) + 0.5_wp * dz(1) ) / dz(1)
[1819]	1703	!
[1864]	1704	!-- Interpolate only if all required information is available on
	1705	!-- the current PE:
[1839]	1706	IF ( ( ii >= nxl ) .AND. ( ii <= nxr ) ) THEN
	1707	IF ( ( jj >= nys ) .AND. ( jj <= nyn ) ) THEN
[1819]	1708
[1839]	1709	aa = ( ( ii + 1 ) * dx - rbx(ring,rseg) ) * &
	1710	( ( jj + 1 + 0.5_wp ) * dy - rby(ring,rseg) )
	1711	bb = ( rbx(ring,rseg) - ii * dx ) * &
	1712	( ( jj + 1 + 0.5_wp ) * dy - rby(ring,rseg) )
	1713	cc = ( ( ii+1 ) * dx - rbx(ring,rseg) ) * &
	1714	( rby(ring,rseg) - ( jj + 0.5_wp ) * dy )
	1715	dd = ( rbx(ring,rseg) - ii * dx ) * &
	1716	( rby(ring,rseg) - ( jj + 0.5_wp ) * dy )
[1819]	1717	gg = dx * dy
	1718
[1864]	1719	u_int_l = ( aa * u(kk,jj,ii) + &
	1720	bb * u(kk,jj,ii+1) + &
	1721	cc * u(kk,jj+1,ii) + &
	1722	dd * u(kk,jj+1,ii+1) &
[1819]	1723	) / gg
	1724
[1864]	1725	u_int_u = ( aa * u(kk+1,jj,ii) + &
	1726	bb * u(kk+1,jj,ii+1) + &
	1727	cc * u(kk+1,jj+1,ii) + &
	1728	dd * u(kk+1,jj+1,ii+1) &
[1819]	1729	) / gg
	1730
[1864]	1731	u_int_1_l(inot,ring,rseg) = u_int_l + &
[3065]	1732	( rbz(ring,rseg) - zu(kk) ) / dz(1) * &
[1819]	1733	( u_int_u - u_int_l )
	1734
	1735	ELSE
	1736	u_int_1_l(inot,ring,rseg) = 0.0_wp
	1737	ENDIF
	1738	ELSE
	1739	u_int_1_l(inot,ring,rseg) = 0.0_wp
	1740	ENDIF
	1741
	1742
	1743	!
	1744	!-- Interpolation of the v-component:
	1745	ii = ( rbx(ring,rseg) - 0.5_wp * dx ) * ddx
[1839]	1746	jj = rby(ring,rseg) * ddy
[3065]	1747	kk = ( rbz(ring,rseg) + 0.5_wp * dz(1) ) / dz(1)
[1819]	1748	!
[1864]	1749	!-- Interpolate only if all required information is available on
	1750	!-- the current PE:
[1839]	1751	IF ( ( ii >= nxl ) .AND. ( ii <= nxr ) ) THEN
	1752	IF ( ( jj >= nys ) .AND. ( jj <= nyn ) ) THEN
[1819]	1753
[1839]	1754	aa = ( ( ii + 1 + 0.5_wp ) * dx - rbx(ring,rseg) ) * &
	1755	( ( jj + 1 ) * dy - rby(ring,rseg) )
	1756	bb = ( rbx(ring,rseg) - ( ii + 0.5_wp ) * dx ) * &
	1757	( ( jj + 1 ) * dy - rby(ring,rseg) )
	1758	cc = ( ( ii + 1 + 0.5_wp ) * dx - rbx(ring,rseg) ) * &
	1759	( rby(ring,rseg) - jj * dy )
	1760	dd = ( rbx(ring,rseg) - ( ii + 0.5_wp ) * dx ) * &
	1761	( rby(ring,rseg) - jj * dy )
[1819]	1762	gg = dx * dy
	1763
[1864]	1764	v_int_l = ( aa * v(kk,jj,ii) + &
	1765	bb * v(kk,jj,ii+1) + &
	1766	cc * v(kk,jj+1,ii) + &
	1767	dd * v(kk,jj+1,ii+1) &
[1819]	1768	) / gg
	1769
[1864]	1770	v_int_u = ( aa * v(kk+1,jj,ii) + &
	1771	bb * v(kk+1,jj,ii+1) + &
	1772	cc * v(kk+1,jj+1,ii) + &
	1773	dd * v(kk+1,jj+1,ii+1) &
[1819]	1774	) / gg
	1775
[1864]	1776	v_int_1_l(inot,ring,rseg) = v_int_l + &
[3065]	1777	( rbz(ring,rseg) - zu(kk) ) / dz(1) * &
[1819]	1778	( v_int_u - v_int_l )
	1779
	1780	ELSE
	1781	v_int_1_l(inot,ring,rseg) = 0.0_wp
	1782	ENDIF
	1783	ELSE
	1784	v_int_1_l(inot,ring,rseg) = 0.0_wp
	1785	ENDIF
	1786
	1787
	1788	!
	1789	!-- Interpolation of the w-component:
	1790	ii = ( rbx(ring,rseg) - 0.5_wp * dx ) * ddx
	1791	jj = ( rby(ring,rseg) - 0.5_wp * dy ) * ddy
[3065]	1792	kk = rbz(ring,rseg) / dz(1)
[1819]	1793	!
[1864]	1794	!-- Interpolate only if all required information is available on
	1795	!-- the current PE:
[1839]	1796	IF ( ( ii >= nxl ) .AND. ( ii <= nxr ) ) THEN
	1797	IF ( ( jj >= nys ) .AND. ( jj <= nyn ) ) THEN
[1819]	1798
[1839]	1799	aa = ( ( ii + 1 + 0.5_wp ) * dx - rbx(ring,rseg) ) * &
	1800	( ( jj + 1 + 0.5_wp ) * dy - rby(ring,rseg) )
	1801	bb = ( rbx(ring,rseg) - ( ii + 0.5_wp ) * dx ) * &
	1802	( ( jj + 1 + 0.5_wp ) * dy - rby(ring,rseg) )
	1803	cc = ( ( ii + 1 + 0.5_wp ) * dx - rbx(ring,rseg) ) * &
	1804	( rby(ring,rseg) - ( jj + 0.5_wp ) * dy )
	1805	dd = ( rbx(ring,rseg) - ( ii + 0.5_wp ) * dx ) * &
	1806	( rby(ring,rseg) - ( jj + 0.5_wp ) * dy )
[1819]	1807	gg = dx * dy
	1808
[1864]	1809	w_int_l = ( aa * w(kk,jj,ii) + &
	1810	bb * w(kk,jj,ii+1) + &
	1811	cc * w(kk,jj+1,ii) + &
	1812	dd * w(kk,jj+1,ii+1) &
[1819]	1813	) / gg
	1814
[1864]	1815	w_int_u = ( aa * w(kk+1,jj,ii) + &
	1816	bb * w(kk+1,jj,ii+1) + &
	1817	cc * w(kk+1,jj+1,ii) + &
	1818	dd * w(kk+1,jj+1,ii+1) &
[1819]	1819	) / gg
	1820
[1864]	1821	w_int_1_l(inot,ring,rseg) = w_int_l + &
[3065]	1822	( rbz(ring,rseg) - zw(kk) ) / dz(1) * &
[1819]	1823	( w_int_u - w_int_l )
	1824	ELSE
	1825	w_int_1_l(inot,ring,rseg) = 0.0_wp
	1826	ENDIF
	1827	ELSE
	1828	w_int_1_l(inot,ring,rseg) = 0.0_wp
	1829	ENDIF
	1830
	1831	ENDDO
	1832	ENDDO
[3832]	1833	!$OMP END PARALLEL
[1819]	1834
	1835	ENDDO
	1836
	1837	!
	1838	!-- Exchange between PEs (information required on each PE):
	1839	#if defined( __parallel )
[1839]	1840	CALL MPI_ALLREDUCE( u_int_1_l, u_int, nturbines * MAXVAL(nrings) * &
	1841	MAXVAL(nsegs), MPI_REAL, MPI_SUM, comm2d, ierr )
	1842	CALL MPI_ALLREDUCE( v_int_1_l, v_int, nturbines * MAXVAL(nrings) * &
	1843	MAXVAL(nsegs), MPI_REAL, MPI_SUM, comm2d, ierr )
	1844	CALL MPI_ALLREDUCE( w_int_1_l, w_int, nturbines * MAXVAL(nrings) * &
	1845	MAXVAL(nsegs), MPI_REAL, MPI_SUM, comm2d, ierr )
[1819]	1846	#else
	1847	u_int = u_int_1_l
	1848	v_int = v_int_1_l
	1849	w_int = w_int_1_l
	1850	#endif
	1851
	1852
	1853	!
	1854	!-- Loop over number of turbines:
[1912]	1855
[1819]	1856	DO inot = 1, nturbines
[1912]	1857	pit_loop: DO
[1819]	1858
[1912]	1859	IF ( pitch_sw ) THEN
[1839]	1860	torque_total(inot) = 0.0_wp
[1912]	1861	thrust_rotor(inot) = 0.0_wp
	1862	pitch_add(inot) = pitch_add(inot) + 0.25_wp
	1863	! IF ( myid == 0 ) PRINT*, 'Pitch', inot, pitch_add(inot)
	1864	ELSE
	1865	cos_yaw = COS(phi_yaw(inot))
	1866	sin_yaw = SIN(phi_yaw(inot))
	1867	IF ( pitch_control ) THEN
	1868	pitch_add(inot) = MAX(pitch_add_old(inot) - pitch_rate * &
	1869	dt_3d , 0.0_wp )
	1870	ENDIF
[1819]	1871	ENDIF
	1872
[1839]	1873	!
	1874	!-- Loop over rings of each turbine:
[3832]	1875	!$OMP PARALLEL PRIVATE (ring, rseg, sin_rot, cos_rot, re, rea, ren, rote, rota, rotn, &
	1876	!$OMP& vtheta, phi_rel, lct, rad_d, alpha_attack, vrel, &
	1877	!$OMP& chord, iialpha, iir, turb_cl, tl_factor, thrust_seg, &
	1878	!$OMP& torque_seg_y, turb_cd, torque_seg_z, thrust_ring, &
	1879	!$OMP& torque_ring_y, torque_ring_z)
	1880	!$OMP DO
[1819]	1881	DO ring = 1, nrings(inot)
	1882	!
	1883	!-- Determine distance between each ring (center) and the hub:
	1884	cur_r = (ring - 0.5_wp) * delta_r(inot)
[1839]	1885	!
	1886	!-- Loop over segments of each ring of each turbine:
[1819]	1887	DO rseg = 1, nsegs(ring,inot)
	1888	!
[1839]	1889	!-- Determine angle of ring segment towards zero degree angle of
	1890	!-- rotor system (at zero degree rotor direction vectors aligned
	1891	!-- with y-axis):
[1819]	1892	phi_rotor = rseg * 2.0_wp * pi / nsegs(ring,inot)
	1893	cos_rot = COS(phi_rotor)
	1894	sin_rot = SIN(phi_rotor)
	1895	!
[1839]	1896	!-- Now the direction vectors can be determined with respect to
	1897	!-- the yaw and tilt angle:
[1819]	1898	re(1) = cos_rot * sin_yaw
	1899	re(2) = cos_rot * cos_yaw
	1900	re(3) = sin_rot
	1901
[1864]	1902	! The current unit vector in azimuthal direction:
[1819]	1903	rea(1) = - sin_rot * sin_yaw
	1904	rea(2) = - sin_rot * cos_yaw
	1905	rea(3) = cos_rot
	1906
	1907	!
[1864]	1908	!-- To respect the yawing angle for the calculations of
	1909	!-- velocities and forces the unit vectors perpendicular to the
	1910	!-- rotor area in direction of the positive yaw angle are defined:
[1819]	1911	ren(1) = cos_yaw
	1912	ren(2) = - sin_yaw
	1913	ren(3) = 0.0_wp
	1914	!
	1915	!-- Multiplication with the coordinate transformation matrix
[1864]	1916	!-- gives the final unit vector with consideration of the rotor
	1917	!-- tilt:
[1819]	1918	rote = MATMUL( rot_coord_trans(inot,:,:), re )
	1919	rota = MATMUL( rot_coord_trans(inot,:,:), rea )
	1920	rotn = MATMUL( rot_coord_trans(inot,:,:), ren )
	1921	!
	1922	!-- Coordinates of the single segments (center points):
	1923	rbx(ring,rseg) = rcx(inot) + cur_r * rote(1)
	1924
	1925	rby(ring,rseg) = rcy(inot) + cur_r * rote(2)
	1926
	1927	rbz(ring,rseg) = rcz(inot) + cur_r * rote(3)
	1928
	1929	!
[1864]	1930	!-- !-----------------------------------------------------------!
	1931	!-- !-- Calculation of various angles and relative velocities --!
	1932	!-- !-----------------------------------------------------------!
[1819]	1933	!
[1864]	1934	!-- In the following the 3D-velocity field is projected its
[2553]	1935	!-- components perpendicular and parallel to the rotor area
[1819]	1936	!-- The calculation of forces will be done in the rotor-
	1937	!-- coordinates y' and z.
	1938	!-- The yaw angle will be reintroduced when the force is applied
	1939	!-- on the hydrodynamic equations
[1864]	1940	!
	1941	!-- Projection of the xy-velocities relative to the rotor area
	1942	!
[1819]	1943	!-- Velocity perpendicular to the rotor area:
[1864]	1944	u_rot = u_int(inot,ring,rseg)*rotn(1) + &
	1945	v_int(inot,ring,rseg)*rotn(2) + &
[1819]	1946	w_int(inot,ring,rseg)*rotn(3)
	1947	!
[1864]	1948	!-- Projection of the 3D-velocity vector in the azimuthal
	1949	!-- direction:
	1950	vtheta(rseg) = rota(1) * u_int(inot,ring,rseg) + &
	1951	rota(2) * v_int(inot,ring,rseg) + &
[1819]	1952	rota(3) * w_int(inot,ring,rseg)
	1953	!
[1864]	1954	!-- Determination of the angle phi_rel between the rotor plane
	1955	!-- and the direction of the flow relative to the rotor:
[1819]	1956
[1864]	1957	phi_rel(rseg) = ATAN( u_rot / &
	1958	( omega_rot(inot) * cur_r - &
[1819]	1959	vtheta(rseg) ) )
	1960
	1961	!
[1864]	1962	!-- Interpolation of the local pitch angle from tabulated values
	1963	!-- to the current radial position:
[1819]	1964
	1965	lct=minloc(ABS(cur_r-lrd))
	1966	rad_d=cur_r-lrd(lct)
	1967
	1968	IF (cur_r == 0.0_wp) THEN
	1969	alpha_attack(rseg) = 0.0_wp
	1970	ELSE IF (cur_r >= lrd(size(ard))) THEN
[1864]	1971	alpha_attack(rseg) = ( ard(size(ard)) + &
	1972	ard(size(ard)-1) ) / 2.0_wp
[1819]	1973	ELSE
[1864]	1974	alpha_attack(rseg) = ( ard(lct(1)) * &
	1975	( ( lrd(lct(1)+1) - cur_r ) / &
	1976	( lrd(lct(1)+1) - lrd(lct(1)) ) &
	1977	) ) + ( ard(lct(1)+1) * &
	1978	( ( cur_r - lrd(lct(1)) ) / &
	1979	( lrd(lct(1)+1) - lrd(lct(1)) ) ) )
[1819]	1980	ENDIF
	1981
	1982	!
[1864]	1983	!-- In Fortran radian instead of degree is used as unit for all
	1984	!-- angles. Therefore, a transformation from angles given in
	1985	!-- degree to angles given in radian is necessary here:
	1986	alpha_attack(rseg) = alpha_attack(rseg) * &
[1819]	1987	( (2.0_wp*pi) / 360.0_wp )
	1988	!
[1864]	1989	!-- Substraction of the local pitch angle to obtain the local
	1990	!-- angle of attack:
[1819]	1991	alpha_attack(rseg) = phi_rel(rseg) - alpha_attack(rseg)
	1992	!
[1864]	1993	!-- Preliminary transformation back from angles given in radian
	1994	!-- to angles given in degree:
	1995	alpha_attack(rseg) = alpha_attack(rseg) * &
[1819]	1996	( 360.0_wp / (2.0_wp*pi) )
	1997	!
[1864]	1998	!-- Correct with collective pitch angle:
[3139]	1999	alpha_attack(rseg) = alpha_attack(rseg) - pitch_add(inot)
[1819]	2000
	2001	!
[1864]	2002	!-- Determination of the magnitude of the flow velocity relative
	2003	!-- to the rotor:
[1912]	2004	vrel(rseg) = SQRT( u_rot**2 + &
	2005	( omega_rot(inot) * cur_r - &
[1819]	2006	vtheta(rseg) )**2 )
	2007
	2008	!
[1864]	2009	!-- !-----------------------------------------------------------!
	2010	!-- !-- Interpolation of chord as well as lift and drag --!
	2011	!-- !-- coefficients from tabulated values --!
	2012	!-- !-----------------------------------------------------------!
[1819]	2013
	2014	!
[1864]	2015	!-- Interpolation of the chord_length from tabulated values to
	2016	!-- the current radial position:
[1819]	2017
	2018	IF (cur_r == 0.0_wp) THEN
	2019	chord(rseg) = 0.0_wp
	2020	ELSE IF (cur_r >= lrd(size(crd))) THEN
[1864]	2021	chord(rseg) = (crd(size(crd)) + ard(size(crd)-1)) / 2.0_wp
[1819]	2022	ELSE
[1864]	2023	chord(rseg) = ( crd(lct(1)) * &
	2024	( ( lrd(lct(1)+1) - cur_r ) / &
	2025	( lrd(lct(1)+1) - lrd(lct(1)) ) ) ) + &
	2026	( crd(lct(1)+1) * &
	2027	( ( cur_r-lrd(lct(1)) ) / &
	2028	( lrd(lct(1)+1) - lrd(lct(1)) ) ) )
[1819]	2029	ENDIF
	2030
	2031	!
	2032	!-- Determine index of current angle of attack, needed for
[1864]	2033	!-- finding the appropriate interpolated values of the lift and
[2836]	2034	!-- drag coefficients (-180.0 degrees = 1, +180.0 degrees = 3601,
	2035	!-- so one index every 0.1 degrees):
[1864]	2036	iialpha = CEILING( ( alpha_attack(rseg) + 180.0_wp ) &
[2836]	2037	* ( 1.0_wp / accu_cl_cd_tab ) ) + 1.0_wp
[1819]	2038	!
	2039	!-- Determine index of current radial position, needed for
[1864]	2040	!-- finding the appropriate interpolated values of the lift and
	2041	!-- drag coefficients (one index every 0.1 m):
[1819]	2042	iir = CEILING( cur_r * 10.0_wp )
	2043	!
[1864]	2044	!-- Read in interpolated values of the lift and drag coefficients
	2045	!-- for the current radial position and angle of attack:
[1839]	2046	turb_cl(rseg) = turb_cl_tab(iialpha,iir)
	2047	turb_cd(rseg) = turb_cd_tab(iialpha,iir)
[1819]	2048
	2049	!
[1864]	2050	!-- Final transformation back from angles given in degree to
	2051	!-- angles given in radian:
	2052	alpha_attack(rseg) = alpha_attack(rseg) * &
[1819]	2053	( (2.0_wp*pi) / 360.0_wp )
	2054
[2152]	2055	IF ( tl_cor ) THEN
	2056
	2057	!-- Tip loss correction following Schito
	2058	!-- Schito applies the tip loss correction only to the lift force
	2059	!-- Therefore, the tip loss correction is only applied to the lift
	2060	!-- coefficient and not to the drag coefficient in our case
	2061	!--
	2062	tl_factor = ( 2.0 / pi ) * &
	2063	ACOS( EXP( -1.0 * ( 3.0 * ( rr(inot) - cur_r ) / &
	2064	( 2.0 * cur_r * abs( sin( phi_rel(rseg) ) ) ) ) ) )
	2065
	2066	turb_cl(rseg) = tl_factor * turb_cl(rseg)
	2067
[2894]	2068	ENDIF
[1819]	2069	!
	2070	!-- !-----------------------------------------------------!
	2071	!-- !-- Calculation of the forces --!
	2072	!-- !-----------------------------------------------------!
	2073
	2074	!
[1864]	2075	!-- Calculate the pre_factor for the thrust and torque forces:
[1819]	2076
	2077	pre_factor = 0.5_wp * (vrel(rseg)*2) 3.0_wp * &
	2078	chord(rseg) * delta_r(inot) / nsegs(ring,inot)
	2079
	2080	!
[1864]	2081	!-- Calculate the thrust force (x-component of the total force)
	2082	!-- for each ring segment:
	2083	thrust_seg(rseg) = pre_factor * &
	2084	( turb_cl(rseg) * COS(phi_rel(rseg)) + &
	2085	turb_cd(rseg) * SIN(phi_rel(rseg)) )
[1819]	2086
	2087	!
[1864]	2088	!-- Determination of the second of the additional forces acting
	2089	!-- on the flow in the azimuthal direction: force vector as basis
	2090	!-- for torque (torque itself would be the vector product of the
	2091	!-- radius vector and the force vector):
	2092	torque_seg = pre_factor * &
	2093	( turb_cl(rseg) * SIN(phi_rel(rseg)) - &
[1839]	2094	turb_cd(rseg) * COS(phi_rel(rseg)) )
[1819]	2095	!
	2096	!-- Decomposition of the force vector into two parts:
[1864]	2097	!-- One acting along the y-direction and one acting along the
	2098	!-- z-direction of the rotor coordinate system:
[1819]	2099
	2100	torque_seg_y(rseg) = -torque_seg * sin_rot
	2101	torque_seg_z(rseg) = torque_seg * cos_rot
	2102
[1912]	2103	!
	2104	!-- Add the segment thrust to the thrust of the whole rotor
[3832]	2105	!$OMP CRITICAL
[1912]	2106	thrust_rotor(inot) = thrust_rotor(inot) + &
	2107	thrust_seg(rseg)
	2108
	2109
[1819]	2110	torque_total(inot) = torque_total(inot) + (torque_seg * cur_r)
[3832]	2111	!$OMP END CRITICAL
[1819]	2112
[1864]	2113	ENDDO !-- end of loop over ring segments
[1819]	2114
	2115	!
[1864]	2116	!-- Restore the forces into arrays containing all the segments of
	2117	!-- each ring:
[1819]	2118	thrust_ring(ring,:) = thrust_seg(:)
	2119	torque_ring_y(ring,:) = torque_seg_y(:)
	2120	torque_ring_z(ring,:) = torque_seg_z(:)
	2121
	2122
[1864]	2123	ENDDO !-- end of loop over rings
[3832]	2124	!$OMP END PARALLEL
[1819]	2125
	2126
[1864]	2127	CALL cpu_log( log_point_s(62), 'wtm_controller', 'start' )
[1819]	2128
[1912]	2129
	2130	IF ( speed_control ) THEN
	2131	!
	2132	!-- Calculation of the current generator speed for rotor speed control
	2133
	2134	!
	2135	!-- The acceleration of the rotor speed is calculated from
	2136	!-- the force balance of the accelerating torque
	2137	!-- and the torque of the rotating rotor and generator
	2138	om_rate = ( torque_total(inot) * air_dens * gear_eff - &
	2139	gear_ratio * torque_gen_old(inot) ) / &
	2140	( inertia_rot + &
	2141	gear_ratio * gear_ratio * inertia_gen ) * dt_3d
[1819]	2142
[1912]	2143	!
	2144	!-- The generator speed is given by the product of gear gear_ratio
	2145	!-- and rotor speed
	2146	omega_gen(inot) = gear_ratio * ( omega_rot(inot) + om_rate )
	2147
	2148	ENDIF
	2149
[1864]	2150	IF ( pitch_control ) THEN
[1819]	2151
[1912]	2152	!
	2153	!-- If the current generator speed is above rated, the pitch is not
	2154	!-- saturated and the change from the last time step is within the
	2155	!-- maximum pitch rate, then the pitch loop is repeated with a pitch
	2156	!-- gain
	2157	IF ( ( omega_gen(inot) > rated_genspeed ) .AND. &
	2158	( pitch_add(inot) < 25.0_wp ) .AND. &
	2159	( pitch_add(inot) < pitch_add_old(inot) + &
	2160	pitch_rate * dt_3d ) ) THEN
[1864]	2161	pitch_sw = .TRUE.
[1912]	2162	!
	2163	!-- Go back to beginning of pit_loop
	2164	CYCLE pit_loop
[1819]	2165	ENDIF
[1912]	2166
	2167	!
	2168	!-- The current pitch is saved for the next time step
	2169	pitch_add_old(inot) = pitch_add(inot)
[1864]	2170	pitch_sw = .FALSE.
[1819]	2171	ENDIF
[1912]	2172	EXIT pit_loop
	2173	ENDDO pit_loop ! Recursive pitch control loop
[1819]	2174
[1864]	2175
[1819]	2176	!
[1864]	2177	!-- Call the rotor speed controller
	2178
[1819]	2179	IF ( speed_control ) THEN
	2180	!
[1864]	2181	!-- Find processor at i_hub, j_hub
[1912]	2182	IF ( ( nxl <= i_hub(inot) ) .AND. ( nxr >= i_hub(inot) ) ) &
	2183	THEN
	2184	IF ( ( nys <= j_hub(inot) ) .AND. ( nyn >= j_hub(inot) ) )&
	2185	THEN
[1864]	2186	CALL wtm_speed_control( inot )
	2187	ENDIF
[1912]	2188	ENDIF
[1864]	2189
[1819]	2190	ENDIF
	2191
	2192
[1864]	2193	CALL cpu_log( log_point_s(62), 'wtm_controller', 'stop' )
[1819]	2194
[1864]	2195	CALL cpu_log( log_point_s(63), 'wtm_smearing', 'start' )
[1819]	2196
	2197
[1864]	2198	!-- !-----------------------------------------------------------------!
	2199	!-- !-- Regularization kernel --!
	2200	!-- !-- Smearing of the forces and interpolation to cartesian grid --!
	2201	!-- !-----------------------------------------------------------------!
[1819]	2202	!
[1864]	2203	!-- The aerodynamic blade forces need to be distributed smoothly on
	2204	!-- several mesh points in order to avoid singular behaviour
[1819]	2205	!
	2206	!-- Summation over sum of weighted forces. The weighting factor
[1864]	2207	!-- (calculated in user_init) includes information on the distance
	2208	!-- between the center of the grid cell and the rotor segment under
	2209	!-- consideration
[1819]	2210	!
[1864]	2211	!-- To save computing time, apply smearing only for the relevant part
	2212	!-- of the model domain:
[1819]	2213	!
	2214	!--
	2215	!-- Calculation of the boundaries:
[1864]	2216	i_smear(inot) = CEILING( ( rr(inot) * ABS( roty(inot,1) ) + &
	2217	eps_min ) / dx )
	2218	j_smear(inot) = CEILING( ( rr(inot) * ABS( roty(inot,2) ) + &
	2219	eps_min ) / dy )
[1819]	2220
[3832]	2221	!$OMP PARALLEL PRIVATE (i, j, k, ring, rseg, flag, dist_u_3d, dist_v_3d, dist_w_3d)
	2222	!$OMP DO
[1864]	2223	DO i = MAX( nxl, i_hub(inot) - i_smear(inot) ), &
[1819]	2224	MIN( nxr, i_hub(inot) + i_smear(inot) )
[1864]	2225	DO j = MAX( nys, j_hub(inot) - j_smear(inot) ), &
[1819]	2226	MIN( nyn, j_hub(inot) + j_smear(inot) )
[2232]	2227	! DO k = MAX( nzb_u_inner(j,i)+1, k_hub(inot) - k_smear(inot) ), &
	2228	! k_hub(inot) + k_smear(inot)
	2229	DO k = nzb+1, k_hub(inot) + k_smear(inot)
[1819]	2230	DO ring = 1, nrings(inot)
	2231	DO rseg = 1, nsegs(ring,inot)
	2232	!
[2232]	2233	!-- Predetermine flag to mask topography
[4346]	2234	flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 1 ) )
[2232]	2235
	2236	!
[1819]	2237	!-- Determine the square of the distance between the
	2238	!-- current grid point and each rotor area segment:
[1864]	2239	dist_u_3d = ( i * dx - rbx(ring,rseg) )**2 + &
	2240	( j * dy + 0.5_wp * dy - rby(ring,rseg) )**2 + &
[3065]	2241	( k * dz(1) - 0.5_wp * dz(1) - rbz(ring,rseg) )**2
[1864]	2242	dist_v_3d = ( i * dx + 0.5_wp * dx - rbx(ring,rseg) )**2 + &
	2243	( j * dy - rby(ring,rseg) )**2 + &
[3065]	2244	( k * dz(1) - 0.5_wp * dz(1) - rbz(ring,rseg) )**2
[1864]	2245	dist_w_3d = ( i * dx + 0.5_wp * dx - rbx(ring,rseg) )**2 + &
	2246	( j * dy + 0.5_wp * dy - rby(ring,rseg) )**2 + &
[3065]	2247	( k * dz(1) - rbz(ring,rseg) )**2
[1819]	2248
	2249	!
	2250	!-- 3D-smearing of the forces with a polynomial function
	2251	!-- (much faster than the old Gaussian function), using
	2252	!-- some parameters that have been calculated in user_init.
	2253	!-- The function is only similar to Gaussian function for
	2254	!-- squared distances <= eps_min2:
	2255	IF ( dist_u_3d <= eps_min2 ) THEN
[2232]	2256	thrust(k,j,i) = thrust(k,j,i) + &
	2257	thrust_ring(ring,rseg) * &
	2258	( ( pol_a * dist_u_3d - pol_b ) * &
	2259	dist_u_3d + 1.0_wp ) * eps_factor *&
	2260	flag
[1819]	2261	ENDIF
	2262	IF ( dist_v_3d <= eps_min2 ) THEN
[2232]	2263	torque_y(k,j,i) = torque_y(k,j,i) + &
	2264	torque_ring_y(ring,rseg) * &
	2265	( ( pol_a * dist_v_3d - pol_b ) * &
	2266	dist_v_3d + 1.0_wp ) * eps_factor * &
	2267	flag
[1819]	2268	ENDIF
	2269	IF ( dist_w_3d <= eps_min2 ) THEN
[2232]	2270	torque_z(k,j,i) = torque_z(k,j,i) + &
	2271	torque_ring_z(ring,rseg) * &
	2272	( ( pol_a * dist_w_3d - pol_b ) * &
	2273	dist_w_3d + 1.0_wp ) * eps_factor * &
	2274	flag
[1819]	2275	ENDIF
	2276
	2277	ENDDO ! End of loop over rseg
	2278	ENDDO ! End of loop over ring
	2279
	2280	!
	2281	!-- Rotation of force components:
[2232]	2282	rot_tend_x(k,j,i) = rot_tend_x(k,j,i) + ( &
[1864]	2283	thrust(k,j,i)*rotx(inot,1) + &
	2284	torque_y(k,j,i)*roty(inot,1) + &
[2232]	2285	torque_z(k,j,i)*rotz(inot,1) &
	2286	) * flag
[1819]	2287
[2232]	2288	rot_tend_y(k,j,i) = rot_tend_y(k,j,i) + ( &
[1864]	2289	thrust(k,j,i)*rotx(inot,2) + &
	2290	torque_y(k,j,i)*roty(inot,2) + &
[2232]	2291	torque_z(k,j,i)*rotz(inot,2) &
	2292	) * flag
[1819]	2293
[2232]	2294	rot_tend_z(k,j,i) = rot_tend_z(k,j,i) + ( &
[1864]	2295	thrust(k,j,i)*rotx(inot,3) + &
	2296	torque_y(k,j,i)*roty(inot,3) + &
[2232]	2297	torque_z(k,j,i)*rotz(inot,3) &
	2298	) * flag
[1819]	2299
	2300	ENDDO ! End of loop over k
	2301	ENDDO ! End of loop over j
	2302	ENDDO ! End of loop over i
[3832]	2303	!$OMP END PARALLEL
[1819]	2304
[1864]	2305	CALL cpu_log( log_point_s(63), 'wtm_smearing', 'stop' )
[1819]	2306
[1912]	2307	ENDDO !-- end of loop over turbines
[1819]	2308
	2309
	2310	IF ( yaw_control ) THEN
	2311	!
	2312	!-- Allocate arrays for yaw control at first call
	2313	!-- Can't be allocated before dt_3d is set
	2314	IF ( start_up ) THEN
[1864]	2315	WDLON = NINT( 30.0_wp / dt_3d ) ! 30s running mean array
[1819]	2316	ALLOCATE( wd30(1:nturbines,1:WDLON) )
[1912]	2317	wd30 = 999.0_wp ! Set to dummy value
[1819]	2318	ALLOCATE( wd30_l(1:WDLON) )
	2319
[1864]	2320	WDSHO = NINT( 2.0_wp / dt_3d ) ! 2s running mean array
[1819]	2321	ALLOCATE( wd2(1:nturbines,1:WDSHO) )
[1912]	2322	wd2 = 999.0_wp ! Set to dummy value
[1819]	2323	ALLOCATE( wd2_l(1:WDSHO) )
	2324	start_up = .FALSE.
	2325	ENDIF
	2326
	2327	!
	2328	!-- Calculate the inflow wind speed
	2329	!--
	2330	!-- Loop over number of turbines:
	2331	DO inot = 1, nturbines
	2332	!
	2333	!-- Find processor at i_hub, j_hub
[1912]	2334	IF ( ( nxl <= i_hub(inot) ) .AND. ( nxr >= i_hub(inot) ) ) &
	2335	THEN
	2336	IF ( ( nys <= j_hub(inot) ) .AND. ( nyn >= j_hub(inot) ) )&
	2337	THEN
[1864]	2338
[1819]	2339	u_inflow_l(inot) = u(k_hub(inot),j_hub(inot),i_hub(inot))
[1864]	2340
[1912]	2341	wdir_l(inot) = -1.0_wp * ATAN2( &
	2342	0.5_wp * ( v(k_hub(inot),j_hub(inot),i_hub(inot)+1) + &
	2343	v(k_hub(inot),j_hub(inot),i_hub(inot)) ) , &
	2344	0.5_wp * ( u(k_hub(inot),j_hub(inot)+1,i_hub(inot)) + &
	2345	u(k_hub(inot),j_hub(inot),i_hub(inot)) ) )
[1864]	2346
	2347	CALL wtm_yawcontrol( inot )
	2348
[1819]	2349	phi_yaw_l(inot) = phi_yaw(inot)
[2015]	2350
[1819]	2351	ENDIF
	2352	ENDIF
	2353
[1864]	2354	ENDDO !-- end of loop over turbines
	2355
	2356	!
[1929]	2357	!-- Transfer of information to the other cpus
	2358	#if defined( __parallel )
[1864]	2359	CALL MPI_ALLREDUCE( u_inflow_l, u_inflow, nturbines, MPI_REAL, &
	2360	MPI_SUM, comm2d, ierr )
	2361	CALL MPI_ALLREDUCE( wdir_l, wdir, nturbines, MPI_REAL, MPI_SUM, &
	2362	comm2d, ierr )
	2363	CALL MPI_ALLREDUCE( phi_yaw_l, phi_yaw, nturbines, MPI_REAL, &
	2364	MPI_SUM, comm2d, ierr )
[1929]	2365	#else
	2366	u_inflow = u_inflow_l
	2367	wdir = wdir_l
	2368	phi_yaw = phi_yaw_l
[2015]	2369
	2370
[1929]	2371	#endif
[1819]	2372	DO inot = 1, nturbines
[1864]	2373	!
	2374	!-- Update rotor orientation
	2375	CALL wtm_rotate_rotor( inot )
[1819]	2376
	2377	ENDDO ! End of loop over turbines
	2378
[2894]	2379	ENDIF ! end of yaw control
[1864]	2380
	2381	IF ( speed_control ) THEN
	2382	!
	2383	!-- Transfer of information to the other cpus
[1912]	2384	! CALL MPI_ALLREDUCE( omega_gen, omega_gen_old, nturbines, &
	2385	! MPI_REAL,MPI_SUM, comm2d, ierr )
[1929]	2386	#if defined( __parallel )
[1864]	2387	CALL MPI_ALLREDUCE( torque_gen, torque_gen_old, nturbines, &
	2388	MPI_REAL, MPI_SUM, comm2d, ierr )
	2389	CALL MPI_ALLREDUCE( omega_rot_l, omega_rot, nturbines, &
	2390	MPI_REAL, MPI_SUM, comm2d, ierr )
[1912]	2391	CALL MPI_ALLREDUCE( omega_gen_f, omega_gen_f_old, nturbines, &
	2392	MPI_REAL, MPI_SUM, comm2d, ierr )
[1929]	2393	#else
	2394	torque_gen_old = torque_gen
	2395	omega_rot = omega_rot_l
	2396	omega_gen_f_old = omega_gen_f
	2397	#endif
[1864]	2398
	2399	ENDIF
[1819]	2400
	2401	DO inot = 1, nturbines
	2402
	2403	IF ( myid == 0 ) THEN
	2404	IF ( openfile_turb_mod(400+inot)%opened ) THEN
	2405	WRITE ( 400+inot, 106 ) simulated_time, omega_rot(inot), &
[1912]	2406	omega_gen(inot), torque_gen_old(inot), &
[1864]	2407	torque_total(inot), pitch_add(inot), &
[1912]	2408	torque_gen_old(inot)omega_gen(inot)gen_eff, &
[1864]	2409	torque_total(inot)omega_rot(inot)air_dens, &
[1912]	2410	thrust_rotor(inot), &
[1864]	2411	wdir(inot)*180.0_wp/pi, &
	2412	(phi_yaw(inot))*180.0_wp/pi
[1912]	2413
[1819]	2414	ELSE
	2415
[2669]	2416	WRITE ( turbine_id,'(A2,I2.2)') '_T', inot
	2417	OPEN ( 400+inot, FILE=( 'WTM_OUTPUT_DATA' // &
	2418	TRIM( coupling_char ) // &
	2419	turbine_id ), FORM='FORMATTED' )
[1819]	2420	WRITE ( 400+inot, 105 ) inot
	2421	WRITE ( 400+inot, 106 ) simulated_time, omega_rot(inot), &
[1912]	2422	omega_gen(inot), torque_gen_old(inot), &
[1864]	2423	torque_total(inot), pitch_add(inot), &
[1912]	2424	torque_gen_old(inot)omega_gen(inot)gen_eff, &
[1864]	2425	torque_total(inot)omega_rot(inot)air_dens, &
[1912]	2426	thrust_rotor(inot), &
[1864]	2427	wdir(inot)*180.0_wp/pi, &
	2428	(phi_yaw(inot))*180.0_wp/pi
[1819]	2429	ENDIF
	2430	ENDIF
	2431
[1912]	2432	!-- Set open flag
[1819]	2433	openfile_turb_mod(400+inot)%opened = .TRUE.
[1864]	2434	ENDDO !-- end of loop over turbines
[1819]	2435
	2436	ENDIF
	2437
[1864]	2438	CALL cpu_log( log_point_s(61), 'wtm_forces', 'stop' )
[1819]	2439
[1912]	2440	!
	2441	!-- Formats
[1819]	2442	105 FORMAT ('Turbine control data for turbine ',I2,1X,':'/ &
	2443	&'----------------------------------------'/ &
[4326]	2444	&' Time RSpeed GSpeed GenTorque AeroTorque ', &
	2445	'Pitch Power(Gen) Power(Rot) RotThrust WDirection ', &
	2446	'YawOrient')
[1819]	2447
[4326]	2448	106 FORMAT (F9.2,2X,F7.3,2X,F7.2,2X,F12.1,3X,F12.1,1X,F6.2,2X,F12.1,2X, &
	2449	F12.1,1X,F12.1,4X,F7.2,4X,F7.2)
[1819]	2450
	2451
	2452	END SUBROUTINE wtm_forces
	2453
	2454
[1839]	2455	!------------------------------------------------------------------------------!
	2456	! Description:
	2457	! ------------
	2458	!> Yaw controller for the wind turbine model
	2459	!------------------------------------------------------------------------------!
	2460	SUBROUTINE wtm_yawcontrol( inot )
	2461
[1819]	2462	USE kinds
[1839]	2463
	2464	IMPLICIT NONE
[1819]	2465
	2466	INTEGER(iwp) :: inot
	2467	INTEGER(iwp) :: i_wd_30
	2468	REAL(wp) :: missal
	2469
	2470	i_wd_30 = 0_iwp
	2471
	2472	!
[1864]	2473	!-- The yaw controller computes a 30s running mean of the wind direction.
	2474	!-- If the difference between turbine alignment and wind direction exceeds
[3593]	2475	!-- 5 degrees, the turbine is yawed. The mechanism stops as soon as the 2s-running
	2476	!-- mean of the missalignment is smaller than 0.5 degrees.
[1864]	2477	!-- Attention: If the timestep during the simulation changes significantly
	2478	!-- the lengths of the running means change and it does not correspond to
	2479	!-- 30s/2s anymore.
	2480	!-- ! Needs to be modified for these situations !
	2481	!-- For wind from the east, the averaging of the wind direction could cause
	2482	!-- problems and the yaw controller is probably flawed. -> Routine for
	2483	!-- averaging needs to be improved!
	2484	!
	2485	!-- Check if turbine is not yawing
[1819]	2486	IF ( .NOT. doyaw(inot) ) THEN
[1843]	2487	!
[1864]	2488	!-- Write current wind direction into array
[1843]	2489	wd30_l = wd30(inot,:)
	2490	wd30_l = CSHIFT( wd30_l, SHIFT=-1 )
[1819]	2491	wd30_l(1) = wdir(inot)
[1843]	2492	!
[1864]	2493	!-- Check if array is full ( no more dummies )
[1819]	2494	IF ( .NOT. ANY( wd30_l == 999.) ) THEN
	2495
	2496	missal = SUM( wd30_l ) / SIZE( wd30_l ) - phi_yaw(inot)
	2497	!
[1864]	2498	!-- Check if turbine is missaligned by more than max_miss
[1843]	2499	IF ( ABS( missal ) > max_miss ) THEN
	2500	!
[1864]	2501	!-- Check in which direction to yaw
[1843]	2502	yawdir(inot) = SIGN( 1.0_wp, missal )
[1819]	2503	!
[1864]	2504	!-- Start yawing of turbine
[1843]	2505	phi_yaw(inot) = phi_yaw(inot) + yawdir(inot) * yaw_speed * dt_3d
[1819]	2506	doyaw(inot) = .TRUE.
[1864]	2507	wd30_l = 999. ! fill with dummies again
[1819]	2508	ENDIF
	2509	ENDIF
	2510
	2511	wd30(inot,:) = wd30_l
	2512
	2513	!
[1864]	2514	!-- If turbine is already yawing:
	2515	!-- Initialize 2 s running mean and yaw until the missalignment is smaller
	2516	!-- than min_miss
[1819]	2517
	2518	ELSE
	2519	!
	2520	!-- Initialize 2 s running mean
	2521	wd2_l = wd2(inot,:)
[1864]	2522	wd2_l = CSHIFT( wd2_l, SHIFT = -1 )
[1819]	2523	wd2_l(1) = wdir(inot)
[1843]	2524	!
[1864]	2525	!-- Check if array is full ( no more dummies )
	2526	IF ( .NOT. ANY( wd2_l == 999.0_wp ) ) THEN
	2527	!
	2528	!-- Calculate missalignment of turbine
[1819]	2529	missal = SUM( wd2_l - phi_yaw(inot) ) / SIZE( wd2_l )
[1864]	2530	!
	2531	!-- Check if missalignment is still larger than 0.5 degree and if the
	2532	!-- yaw direction is still right
	2533	IF ( ( ABS( missal ) > min_miss ) .AND. &
	2534	( yawdir(inot) == SIGN( 1.0_wp, missal ) ) ) THEN
	2535	!
	2536	!-- Continue yawing
	2537	phi_yaw(inot) = phi_yaw(inot) + yawdir(inot) * yaw_speed * dt_3d
[1819]	2538	ELSE
[1864]	2539	!
	2540	!-- Stop yawing
[1819]	2541	doyaw(inot) = .FALSE.
[1864]	2542	wd2_l = 999.0_wp ! fill with dummies again
[1819]	2543	ENDIF
	2544	ELSE
[1864]	2545	!
	2546	!-- Continue yawing
[1843]	2547	phi_yaw(inot) = phi_yaw(inot) + yawdir(inot) * yaw_speed * dt_3d
[1819]	2548	ENDIF
	2549
	2550	wd2(inot,:) = wd2_l
	2551
	2552	ENDIF
	2553
[1839]	2554	END SUBROUTINE wtm_yawcontrol
[1819]	2555
[1864]	2556
[1819]	2557	!------------------------------------------------------------------------------!
	2558	! Description:
	2559	! ------------
[1864]	2560	!> Initialization of the speed control
	2561	!------------------------------------------------------------------------------!
	2562	SUBROUTINE wtm_init_speed_control
	2563
	2564
	2565	IMPLICIT NONE
	2566
	2567	!
	2568	!-- If speed control is set, remaining variables and control_parameters for
	2569	!-- the control algorithm are calculated
	2570	!
	2571	!-- Calculate slope constant for region 15
	2572	slope15 = ( slope2 * min_reg2 * min_reg2 ) / ( min_reg2 - min_reg15 )
	2573	!
	2574	!-- Calculate upper limit of slipage region
	2575	vs_sysp = rated_genspeed / 1.1_wp
	2576	!
	2577	!-- Calculate slope of slipage region
	2578	slope25 = ( rated_power / rated_genspeed ) / &
	2579	( rated_genspeed - vs_sysp )
	2580	!
	2581	!-- Calculate lower limit of slipage region
	2582	min_reg25 = ( slope25 - SQRT( slope25 * ( slope25 - 4.0_wp * &
	2583	slope2 * vs_sysp ) ) ) / &
[2410]	2584	( 2.0_wp * slope2 )
[1864]	2585	!
	2586	!-- Frequency for the simple low pass filter
	2587	Fcorner = 0.25_wp
	2588	!
	2589	!-- At the first timestep the torque is set to its maximum to prevent
	2590	!-- an overspeeding of the rotor
[2563]	2591	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
	2592	torque_gen_old(:) = max_torque_gen
	2593	ENDIF
[1864]	2594
	2595	END SUBROUTINE wtm_init_speed_control
	2596
	2597
	2598	!------------------------------------------------------------------------------!
	2599	! Description:
	2600	! ------------
	2601	!> Simple controller for the regulation of the rotor speed
	2602	!------------------------------------------------------------------------------!
	2603	SUBROUTINE wtm_speed_control( inot )
	2604
	2605
	2606	IMPLICIT NONE
	2607
[1912]	2608	INTEGER(iwp) :: inot
	2609
	2610
[1864]	2611
	2612	!
	2613	!-- The controller is based on the fortran script from Jonkman
	2614	!-- et al. 2009 "Definition of a 5 MW Reference Wind Turbine for
	2615	!-- offshore system developement"
	2616
	2617	!
	2618	!-- The generator speed is filtered by a low pass filter
	2619	!-- for the control of the generator torque
	2620	lp_coeff = EXP( -2.0_wp * 3.14_wp * dt_3d * Fcorner )
[1912]	2621	omega_gen_f(inot) = ( 1.0_wp - lp_coeff ) * omega_gen(inot) + lp_coeff *&
[1864]	2622	omega_gen_f_old(inot)
	2623
	2624	IF ( omega_gen_f(inot) <= min_reg15 ) THEN
	2625	!
	2626	!-- Region 1: Generator torque is set to zero to accelerate the rotor:
	2627	torque_gen(inot) = 0
	2628
	2629	ELSEIF ( omega_gen_f(inot) <= min_reg2 ) THEN
	2630	!
	2631	!-- Region 1.5: Generator torque is increasing linearly with rotor speed:
	2632	torque_gen(inot) = slope15 * ( omega_gen_f(inot) - min_reg15 )
	2633
	2634	ELSEIF ( omega_gen_f(inot) <= min_reg25 ) THEN
	2635	!
	2636	!-- Region 2: Generator torque is increased by the square of the generator
	2637	!-- speed to keep the TSR optimal:
	2638	torque_gen(inot) = slope2 * omega_gen_f(inot) * omega_gen_f(inot)
	2639
	2640	ELSEIF ( omega_gen_f(inot) < rated_genspeed ) THEN
	2641	!
	2642	!-- Region 2.5: Slipage region between 2 and 3:
	2643	torque_gen(inot) = slope25 * ( omega_gen_f(inot) - vs_sysp )
	2644
	2645	ELSE
	2646	!
	2647	!-- Region 3: Generator torque is antiproportional to the rotor speed to
	2648	!-- keep the power constant:
	2649	torque_gen(inot) = rated_power / omega_gen_f(inot)
	2650
	2651	ENDIF
	2652	!
	2653	!-- Calculate torque rate and confine with a max
	2654	trq_rate = ( torque_gen(inot) - torque_gen_old(inot) ) / dt_3d
	2655	trq_rate = MIN( MAX( trq_rate, -1.0_wp * max_trq_rate ), max_trq_rate )
	2656	!
	2657	!-- Calculate new gen torque and confine with max torque
	2658	torque_gen(inot) = torque_gen_old(inot) + trq_rate * dt_3d
	2659	torque_gen(inot) = MIN( torque_gen(inot), max_torque_gen )
	2660	!
	2661	!-- Overwrite values for next timestep
[1912]	2662	omega_rot_l(inot) = omega_gen(inot) / gear_ratio
[1864]	2663
	2664
	2665	END SUBROUTINE wtm_speed_control
	2666
	2667
	2668	!------------------------------------------------------------------------------!
	2669	! Description:
	2670	! ------------
[1839]	2671	!> Application of the additional forces generated by the wind turbine on the
	2672	!> flow components (tendency terms)
	2673	!> Call for all grid points
[1819]	2674	!------------------------------------------------------------------------------!
[3875]	2675	SUBROUTINE wtm_actions( location )
[1819]	2676
	2677
[3875]	2678	CHARACTER (LEN=*) :: location !<
	2679
[1839]	2680	INTEGER(iwp) :: i !< running index
	2681	INTEGER(iwp) :: j !< running index
	2682	INTEGER(iwp) :: k !< running index
[1819]	2683
	2684
[3875]	2685	SELECT CASE ( location )
[1819]	2686
[3875]	2687	CASE ( 'before_timestep' )
	2688
	2689	CALL wtm_forces
	2690
	2691	CASE ( 'u-tendency' )
[1819]	2692	!
	2693	!-- Apply the x-component of the force to the u-component of the flow:
[1864]	2694	IF ( simulated_time >= time_turbine_on ) THEN
[1819]	2695	DO i = nxlg, nxrg
	2696	DO j = nysg, nyng
[2553]	2697	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
[1819]	2698	!
[1864]	2699	!-- Calculate the thrust generated by the nacelle and the tower
[1912]	2700	tend_nac_x = 0.5_wp * nac_cd_surf(k,j,i) * &
[2553]	2701	SIGN( u(k,j,i)**2 , u(k,j,i) )
[1912]	2702	tend_tow_x = 0.5_wp * tow_cd_surf(k,j,i) * &
[1819]	2703	SIGN( u(k,j,i)**2 , u(k,j,i) )
[2553]	2704
[2232]	2705	tend(k,j,i) = tend(k,j,i) + ( - rot_tend_x(k,j,i) &
	2706	- tend_nac_x - tend_tow_x ) &
	2707	* MERGE( 1.0_wp, 0.0_wp, &
[4346]	2708	BTEST( wall_flags_total_0(k,j,i), 1 ) )
[1819]	2709	ENDDO
	2710	ENDDO
	2711	ENDDO
	2712	ENDIF
	2713
[3875]	2714	CASE ( 'v-tendency' )
[1819]	2715	!
	2716	!-- Apply the y-component of the force to the v-component of the flow:
[1864]	2717	IF ( simulated_time >= time_turbine_on ) THEN
[1819]	2718	DO i = nxlg, nxrg
	2719	DO j = nysg, nyng
[2553]	2720	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
[1912]	2721	tend_nac_y = 0.5_wp * nac_cd_surf(k,j,i) * &
[1819]	2722	SIGN( v(k,j,i)**2 , v(k,j,i) )
[1912]	2723	tend_tow_y = 0.5_wp * tow_cd_surf(k,j,i) * &
[1819]	2724	SIGN( v(k,j,i)**2 , v(k,j,i) )
[2232]	2725	tend(k,j,i) = tend(k,j,i) + ( - rot_tend_y(k,j,i) &
	2726	- tend_nac_y - tend_tow_y ) &
	2727	* MERGE( 1.0_wp, 0.0_wp, &
[4346]	2728	BTEST( wall_flags_total_0(k,j,i), 2 ) )
[1819]	2729	ENDDO
	2730	ENDDO
	2731	ENDDO
	2732	ENDIF
	2733
[3875]	2734	CASE ( 'w-tendency' )
[1819]	2735	!
	2736	!-- Apply the z-component of the force to the w-component of the flow:
[1864]	2737	IF ( simulated_time >= time_turbine_on ) THEN
[1819]	2738	DO i = nxlg, nxrg
	2739	DO j = nysg, nyng
[2553]	2740	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
[2232]	2741	tend(k,j,i) = tend(k,j,i) - rot_tend_z(k,j,i) &
	2742	* MERGE( 1.0_wp, 0.0_wp, &
[4346]	2743	BTEST( wall_flags_total_0(k,j,i), 3 ) )
[1819]	2744	ENDDO
	2745	ENDDO
	2746	ENDDO
	2747	ENDIF
	2748
	2749
	2750	CASE DEFAULT
[4056]	2751	CONTINUE
[1819]	2752
	2753	END SELECT
	2754
	2755
[3875]	2756	END SUBROUTINE wtm_actions
[1819]	2757
	2758
	2759	!------------------------------------------------------------------------------!
	2760	! Description:
	2761	! ------------
[1839]	2762	!> Application of the additional forces generated by the wind turbine on the
	2763	!> flow components (tendency terms)
	2764	!> Call for grid point i,j
[1819]	2765	!------------------------------------------------------------------------------!
[3875]	2766	SUBROUTINE wtm_actions_ij( i, j, location )
[1819]	2767
	2768
[3875]	2769	CHARACTER (LEN=*) :: location !<
[1839]	2770	INTEGER(iwp) :: i !< running index
	2771	INTEGER(iwp) :: j !< running index
	2772	INTEGER(iwp) :: k !< running index
[1819]	2773
[3875]	2774	SELECT CASE ( location )
[1819]	2775
[3875]	2776	CASE ( 'before_timestep' )
	2777
	2778	CALL wtm_forces
	2779
	2780	CASE ( 'u-tendency' )
[1819]	2781	!
	2782	!-- Apply the x-component of the force to the u-component of the flow:
[1839]	2783	IF ( simulated_time >= time_turbine_on ) THEN
[2553]	2784	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
[1819]	2785	!
[1839]	2786	!-- Calculate the thrust generated by the nacelle and the tower
[1912]	2787	tend_nac_x = 0.5_wp * nac_cd_surf(k,j,i) * &
[1819]	2788	SIGN( u(k,j,i)**2 , u(k,j,i) )
[1912]	2789	tend_tow_x = 0.5_wp * tow_cd_surf(k,j,i) * &
[1819]	2790	SIGN( u(k,j,i)**2 , u(k,j,i) )
[2232]	2791	tend(k,j,i) = tend(k,j,i) + ( - rot_tend_x(k,j,i) &
	2792	- tend_nac_x - tend_tow_x ) &
	2793	* MERGE( 1.0_wp, 0.0_wp, &
[4346]	2794	BTEST( wall_flags_total_0(k,j,i), 1 ) )
[1819]	2795	ENDDO
	2796	ENDIF
	2797
[3875]	2798	CASE ( 'v-tendency' )
[1819]	2799	!
	2800	!-- Apply the y-component of the force to the v-component of the flow:
[1839]	2801	IF ( simulated_time >= time_turbine_on ) THEN
[2553]	2802	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
[1912]	2803	tend_nac_y = 0.5_wp * nac_cd_surf(k,j,i) * &
[1819]	2804	SIGN( v(k,j,i)**2 , v(k,j,i) )
[1912]	2805	tend_tow_y = 0.5_wp * tow_cd_surf(k,j,i) * &
[1819]	2806	SIGN( v(k,j,i)**2 , v(k,j,i) )
[2232]	2807	tend(k,j,i) = tend(k,j,i) + ( - rot_tend_y(k,j,i) &
	2808	- tend_nac_y - tend_tow_y ) &
	2809	* MERGE( 1.0_wp, 0.0_wp, &
[4346]	2810	BTEST( wall_flags_total_0(k,j,i), 2 ) )
[2553]	2811	ENDDO
[1819]	2812	ENDIF
	2813
[3875]	2814	CASE ( 'w-tendency' )
[1819]	2815	!
	2816	!-- Apply the z-component of the force to the w-component of the flow:
[1839]	2817	IF ( simulated_time >= time_turbine_on ) THEN
[2553]	2818	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
[2232]	2819	tend(k,j,i) = tend(k,j,i) - rot_tend_z(k,j,i) &
	2820	* MERGE( 1.0_wp, 0.0_wp, &
[4346]	2821	BTEST( wall_flags_total_0(k,j,i), 3 ) )
[1819]	2822	ENDDO
	2823	ENDIF
	2824
	2825
	2826	CASE DEFAULT
[4056]	2827	CONTINUE
[1819]	2828
	2829	END SELECT
	2830
	2831
[3875]	2832	END SUBROUTINE wtm_actions_ij
[1819]	2833
	2834	END MODULE wind_turbine_model_mod

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