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source: palm/trunk/SOURCE/lpm_init.f90 @ 1812

Last change on this file since 1812 was 1784, checked in by raasch, 9 years ago
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[1682]	1	!> @file lpm_init.f90
[1036]	2	!--------------------------------------------------------------------------------!
	3	! This file is part of PALM.
	4	!
	5	! PALM is free software: you can redistribute it and/or modify it under the terms
	6	! of the GNU General Public License as published by the Free Software Foundation,
	7	! either version 3 of the License, or (at your option) any later version.
	8	!
	9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
	10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	12	!
	13	! You should have received a copy of the GNU General Public License along with
	14	! PALM. If not, see <http://www.gnu.org/licenses/>.
	15	!
[1691]	16	! Copyright 1997-2015 Leibniz Universitaet Hannover
[1036]	17	!--------------------------------------------------------------------------------!
	18	!
[254]	19	! Current revisions:
[1]	20	! -----------------
[1692]	21	!
[1784]	22	!
[1321]	23	! Former revisions:
	24	! -----------------
	25	! $Id: lpm_init.f90 1784 2016-03-06 19:14:40Z knoop $
	26	!
[1784]	27	! 1783 2016-03-06 18:36:17Z raasch
	28	! netcdf module added
	29	!
[1726]	30	! 1725 2015-11-17 13:01:51Z hoffmann
	31	! Bugfix: Processor-dependent seed for random function is generated before it is
	32	! used.
	33	!
[1692]	34	! 1691 2015-10-26 16:17:44Z maronga
	35	! Renamed prandtl_layer to constant_flux_layer.
	36	!
[1686]	37	! 1685 2015-10-08 07:32:13Z raasch
	38	! bugfix concerning vertical index offset in case of ocean
	39	!
[1683]	40	! 1682 2015-10-07 23:56:08Z knoop
	41	! Code annotations made doxygen readable
	42	!
[1576]	43	! 1575 2015-03-27 09:56:27Z raasch
	44	! initial vertical particle position is allowed to follow the topography
	45	!
[1360]	46	! 1359 2014-04-11 17:15:14Z hoffmann
	47	! New particle structure integrated.
	48	! Kind definition added to all floating point numbers.
	49	! lpm_init changed form a subroutine to a module.
	50	!
[1329]	51	! 1327 2014-03-21 11:00:16Z raasch
	52	! -netcdf_output
	53	!
[1323]	54	! 1322 2014-03-20 16:38:49Z raasch
	55	! REAL functions provided with KIND-attribute
	56	!
[1321]	57	! 1320 2014-03-20 08:40:49Z raasch
[1320]	58	! ONLY-attribute added to USE-statements,
	59	! kind-parameters added to all INTEGER and REAL declaration statements,
	60	! kinds are defined in new module kinds,
	61	! revision history before 2012 removed,
	62	! comment fields (!:) to be used for variable explanations added to
	63	! all variable declaration statements
	64	! bugfix: #if defined( __parallel ) added
[850]	65	!
[1315]	66	! 1314 2014-03-14 18:25:17Z suehring
	67	! Vertical logarithmic interpolation of horizontal particle speed for particles
	68	! between roughness height and first vertical grid level.
	69	!
[1093]	70	! 1092 2013-02-02 11:24:22Z raasch
	71	! unused variables removed
	72	!
[1037]	73	! 1036 2012-10-22 13:43:42Z raasch
	74	! code put under GPL (PALM 3.9)
	75	!
[850]	76	! 849 2012-03-15 10:35:09Z raasch
[849]	77	! routine renamed: init_particles -> lpm_init
	78	! de_dx, de_dy, de_dz are allocated here (instead of automatic arrays in
	79	! advec_particles),
	80	! sort_particles renamed lpm_sort_arrays, user_init_particles renamed lpm_init
[392]	81	!
[829]	82	! 828 2012-02-21 12:00:36Z raasch
	83	! call of init_kernels, particle feature color renamed class
	84	!
[826]	85	! 824 2012-02-17 09:09:57Z raasch
	86	! particle attributes speed_x\|y\|z_sgs renamed rvar1\|2\|3,
	87	! array particles implemented as pointer
	88	!
[668]	89	! 667 2010-12-23 12:06:00Z suehring/gryschka
	90	! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng for allocation
	91	! of arrays.
	92	!
[1]	93	! Revision 1.1 1999/11/25 16:22:38 raasch
	94	! Initial revision
	95	!
	96	!
	97	! Description:
	98	! ------------
[1682]	99	!> This routine initializes a set of particles and their attributes (position,
	100	!> radius, ..) which are used by the Lagrangian particle model (see lpm).
[1]	101	!------------------------------------------------------------------------------!
[1682]	102	MODULE lpm_init_mod
	103
[1]	104
[1320]	105	USE arrays_3d, &
	106	ONLY: de_dx, de_dy, de_dz, zu, zw, z0
	107
	108	USE cloud_parameters, &
	109	ONLY: curvature_solution_effects
	110
	111	USE control_parameters, &
[1691]	112	ONLY: cloud_droplets, constant_flux_layer, current_timestep_number, &
[1783]	113	dz, initializing_actions, message_string, ocean, simulated_time
[1320]	114
	115	USE dvrp_variables, &
	116	ONLY: particle_color, particle_dvrpsize
	117
	118	USE grid_variables, &
[1359]	119	ONLY: ddx, dx, ddy, dy
[1320]	120
	121	USE indices, &
[1575]	122	ONLY: nx, nxl, nxlg, nxrg, nxr, ny, nyn, nys, nyng, nysg, nz, nzb, &
	123	nzb_w_inner, nzt
[1320]	124
	125	USE kinds
	126
	127	USE lpm_collision_kernels_mod, &
	128	ONLY: init_kernels
	129
[1783]	130	USE netcdf_interface, &
	131	ONLY: netcdf_data_format
	132
[1320]	133	USE particle_attributes, &
[1359]	134	ONLY: alloc_factor, bc_par_b, bc_par_lr, bc_par_ns, bc_par_t, &
	135	block_offset, block_offset_def, collision_kernel, &
	136	density_ratio, dvrp_psize, grid_particles, &
	137	initial_weighting_factor, ibc_par_b, ibc_par_lr, ibc_par_ns, &
	138	ibc_par_t, iran_part, log_z_z0, &
	139	max_number_of_particle_groups, maximum_number_of_particles, &
	140	maximum_number_of_tailpoints, maximum_number_of_tails, &
	141	minimum_tailpoint_distance, min_nr_particle, &
	142	mpi_particle_type, new_tail_id, &
[1320]	143	number_of_initial_tails, number_of_particles, &
	144	number_of_particle_groups, number_of_sublayers, &
[1685]	145	number_of_tails, offset_ocean_nzt, offset_ocean_nzt_m1, &
[1359]	146	particles, particle_advection_start, particle_groups, &
	147	particle_groups_type, particles_per_point, &
[1320]	148	particle_tail_coordinates, particle_type, pdx, pdy, pdz, &
[1359]	149	prt_count, psb, psl, psn, psr, pss, pst, &
[1320]	150	radius, random_start_position, read_particles_from_restartfile,&
[1575]	151	seed_follows_topography, skip_particles_for_tail, sort_count, &
[1359]	152	tail_mask, total_number_of_particles, total_number_of_tails, &
[1320]	153	use_particle_tails, use_sgs_for_particles, &
[1359]	154	write_particle_statistics, uniform_particles, zero_particle, &
	155	z0_av_global
[1320]	156
[1]	157	USE pegrid
	158
[1320]	159	USE random_function_mod, &
	160	ONLY: random_function
[1]	161
[1359]	162	IMPLICIT NONE
[1320]	163
[1359]	164	PRIVATE
	165
[1682]	166	INTEGER(iwp), PARAMETER :: PHASE_INIT = 1 !<
	167	INTEGER(iwp), PARAMETER, PUBLIC :: PHASE_RELEASE = 2 !<
[1359]	168
	169	INTERFACE lpm_init
	170	MODULE PROCEDURE lpm_init
	171	END INTERFACE lpm_init
	172
	173	INTERFACE lpm_create_particle
	174	MODULE PROCEDURE lpm_create_particle
	175	END INTERFACE lpm_create_particle
	176
	177	PUBLIC lpm_init, lpm_create_particle
	178
	179	CONTAINS
	180
[1682]	181	!------------------------------------------------------------------------------!
	182	! Description:
	183	! ------------
	184	!> @todo Missing subroutine description.
	185	!------------------------------------------------------------------------------!
[1359]	186	SUBROUTINE lpm_init
	187
	188	USE lpm_collision_kernels_mod, &
	189	ONLY: init_kernels
	190
[1]	191	IMPLICIT NONE
	192
[1682]	193	INTEGER(iwp) :: i !<
	194	INTEGER(iwp) :: ip !<
	195	INTEGER(iwp) :: j !<
	196	INTEGER(iwp) :: jp !<
	197	INTEGER(iwp) :: k !<
	198	INTEGER(iwp) :: kp !<
	199	INTEGER(iwp) :: n !<
	200	INTEGER(iwp) :: nn !<
[1320]	201
[1]	202	#if defined( __parallel )
[1682]	203	INTEGER(iwp), DIMENSION(3) :: blocklengths !<
	204	INTEGER(iwp), DIMENSION(3) :: displacements !<
	205	INTEGER(iwp), DIMENSION(3) :: types !<
[1]	206	#endif
[1682]	207	LOGICAL :: uniform_particles_l !<
[1]	208
[1682]	209	REAL(wp) :: height_int !<
	210	REAL(wp) :: height_p !<
	211	REAL(wp) :: z_p !<
	212	REAL(wp) :: z0_av_local !<
[1]	213
	214	#if defined( __parallel )
	215	!
	216	!-- Define MPI derived datatype for FORTRAN datatype particle_type (see module
[82]	217	!-- particle_attributes). Integer length is 4 byte, Real is 8 byte
[1359]	218	#if defined( __twocachelines )
	219	blocklengths(1) = 7; blocklengths(2) = 18; blocklengths(3) = 1
	220	displacements(1) = 0; displacements(2) = 64; displacements(3) = 128
[82]	221
[1359]	222	types(1) = MPI_REAL ! 64 bit words
	223	types(2) = MPI_INTEGER ! 32 Bit words
	224	types(3) = MPI_UB
	225	#else
	226	blocklengths(1) = 19; blocklengths(2) = 6; blocklengths(3) = 1
	227	displacements(1) = 0; displacements(2) = 152; displacements(3) = 176
	228
[1]	229	types(1) = MPI_REAL
	230	types(2) = MPI_INTEGER
	231	types(3) = MPI_UB
[1359]	232	#endif
[1]	233	CALL MPI_TYPE_STRUCT( 3, blocklengths, displacements, types, &
	234	mpi_particle_type, ierr )
	235	CALL MPI_TYPE_COMMIT( mpi_particle_type, ierr )
	236	#endif
	237
	238	!
[150]	239	!-- In case of oceans runs, the vertical index calculations need an offset,
	240	!-- because otherwise the k indices will become negative
	241	IF ( ocean ) THEN
	242	offset_ocean_nzt = nzt
	243	offset_ocean_nzt_m1 = nzt - 1
	244	ENDIF
	245
[1359]	246	!
	247	!-- Define block offsets for dividing a gridcell in 8 sub cells
[150]	248
[1359]	249	block_offset(0) = block_offset_def (-1,-1,-1)
	250	block_offset(1) = block_offset_def (-1,-1, 0)
	251	block_offset(2) = block_offset_def (-1, 0,-1)
	252	block_offset(3) = block_offset_def (-1, 0, 0)
	253	block_offset(4) = block_offset_def ( 0,-1,-1)
	254	block_offset(5) = block_offset_def ( 0,-1, 0)
	255	block_offset(6) = block_offset_def ( 0, 0,-1)
	256	block_offset(7) = block_offset_def ( 0, 0, 0)
[150]	257	!
[1]	258	!-- Check the number of particle groups.
	259	IF ( number_of_particle_groups > max_number_of_particle_groups ) THEN
[274]	260	WRITE( message_string, * ) 'max_number_of_particle_groups =', &
	261	max_number_of_particle_groups , &
[254]	262	'&number_of_particle_groups reset to ', &
	263	max_number_of_particle_groups
[849]	264	CALL message( 'lpm_init', 'PA0213', 0, 1, 0, 6, 0 )
[1]	265	number_of_particle_groups = max_number_of_particle_groups
	266	ENDIF
	267
	268	!
	269	!-- Set default start positions, if necessary
[1359]	270	IF ( psl(1) == 9999999.9_wp ) psl(1) = -0.5_wp * dx
	271	IF ( psr(1) == 9999999.9_wp ) psr(1) = ( nx + 0.5_wp ) * dx
	272	IF ( pss(1) == 9999999.9_wp ) pss(1) = -0.5_wp * dy
	273	IF ( psn(1) == 9999999.9_wp ) psn(1) = ( ny + 0.5_wp ) * dy
	274	IF ( psb(1) == 9999999.9_wp ) psb(1) = zu(nz/2)
	275	IF ( pst(1) == 9999999.9_wp ) pst(1) = psb(1)
[1]	276
[1359]	277	IF ( pdx(1) == 9999999.9_wp .OR. pdx(1) == 0.0_wp ) pdx(1) = dx
	278	IF ( pdy(1) == 9999999.9_wp .OR. pdy(1) == 0.0_wp ) pdy(1) = dy
	279	IF ( pdz(1) == 9999999.9_wp .OR. pdz(1) == 0.0_wp ) pdz(1) = zu(2) - zu(1)
[1]	280
	281	DO j = 2, number_of_particle_groups
[1359]	282	IF ( psl(j) == 9999999.9_wp ) psl(j) = psl(j-1)
	283	IF ( psr(j) == 9999999.9_wp ) psr(j) = psr(j-1)
	284	IF ( pss(j) == 9999999.9_wp ) pss(j) = pss(j-1)
	285	IF ( psn(j) == 9999999.9_wp ) psn(j) = psn(j-1)
	286	IF ( psb(j) == 9999999.9_wp ) psb(j) = psb(j-1)
	287	IF ( pst(j) == 9999999.9_wp ) pst(j) = pst(j-1)
	288	IF ( pdx(j) == 9999999.9_wp .OR. pdx(j) == 0.0_wp ) pdx(j) = pdx(j-1)
	289	IF ( pdy(j) == 9999999.9_wp .OR. pdy(j) == 0.0_wp ) pdy(j) = pdy(j-1)
	290	IF ( pdz(j) == 9999999.9_wp .OR. pdz(j) == 0.0_wp ) pdz(j) = pdz(j-1)
[1]	291	ENDDO
	292
	293	!
[849]	294	!-- Allocate arrays required for calculating particle SGS velocities
	295	IF ( use_sgs_for_particles ) THEN
	296	ALLOCATE( de_dx(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
	297	de_dy(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
	298	de_dz(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	299	ENDIF
	300
	301	!
[1314]	302	!-- Allocate array required for logarithmic vertical interpolation of
	303	!-- horizontal particle velocities between the surface and the first vertical
	304	!-- grid level. In order to avoid repeated CPU cost-intensive CALLS of
	305	!-- intrinsic FORTRAN procedure LOG(z/z0), LOG(z/z0) is precalculated for
	306	!-- several heights. Splitting into 20 sublayers turned out to be sufficient.
	307	!-- To obtain exact height levels of particles, linear interpolation is applied
	308	!-- (see lpm_advec.f90).
[1691]	309	IF ( constant_flux_layer ) THEN
[1314]	310
	311	ALLOCATE ( log_z_z0(0:number_of_sublayers) )
	312	z_p = zu(nzb+1) - zw(nzb)
	313
	314	!
	315	!-- Calculate horizontal mean value of z0 used for logartihmic
	316	!-- interpolation. Note: this is not exact for heterogeneous z0.
	317	!-- However, sensitivity studies showed that the effect is
	318	!-- negligible.
	319	z0_av_local = SUM( z0(nys:nyn,nxl:nxr) )
[1359]	320	z0_av_global = 0.0_wp
[1314]	321
[1320]	322	#if defined( __parallel )
[1314]	323	CALL MPI_ALLREDUCE(z0_av_local, z0_av_global, 1, MPI_REAL, MPI_SUM, &
	324	comm2d, ierr )
[1320]	325	#else
	326	z0_av_global = z0_av_local
	327	#endif
[1314]	328
	329	z0_av_global = z0_av_global / ( ( ny + 1 ) * ( nx + 1 ) )
	330	!
	331	!-- Horizontal wind speed is zero below and at z0
[1359]	332	log_z_z0(0) = 0.0_wp
[1314]	333	!
	334	!-- Calculate vertical depth of the sublayers
[1322]	335	height_int = ( z_p - z0_av_global ) / REAL( number_of_sublayers, KIND=wp )
[1314]	336	!
	337	!-- Precalculate LOG(z/z0)
[1359]	338	height_p = 0.0_wp
[1314]	339	DO k = 1, number_of_sublayers
	340
	341	height_p = height_p + height_int
	342	log_z_z0(k) = LOG( height_p / z0_av_global )
	343
	344	ENDDO
	345
	346
	347	ENDIF
	348
	349	!
[1359]	350	!-- Check boundary condition and set internal variables
	351	SELECT CASE ( bc_par_b )
	352
	353	CASE ( 'absorb' )
	354	ibc_par_b = 1
	355
	356	CASE ( 'reflect' )
	357	ibc_par_b = 2
	358
	359	CASE DEFAULT
	360	WRITE( message_string, * ) 'unknown boundary condition ', &
	361	'bc_par_b = "', TRIM( bc_par_b ), '"'
	362	CALL message( 'lpm_init', 'PA0217', 1, 2, 0, 6, 0 )
	363
	364	END SELECT
	365	SELECT CASE ( bc_par_t )
	366
	367	CASE ( 'absorb' )
	368	ibc_par_t = 1
	369
	370	CASE ( 'reflect' )
	371	ibc_par_t = 2
	372
	373	CASE DEFAULT
	374	WRITE( message_string, * ) 'unknown boundary condition ', &
	375	'bc_par_t = "', TRIM( bc_par_t ), '"'
	376	CALL message( 'lpm_init', 'PA0218', 1, 2, 0, 6, 0 )
	377
	378	END SELECT
	379	SELECT CASE ( bc_par_lr )
	380
	381	CASE ( 'cyclic' )
	382	ibc_par_lr = 0
	383
	384	CASE ( 'absorb' )
	385	ibc_par_lr = 1
	386
	387	CASE ( 'reflect' )
	388	ibc_par_lr = 2
	389
	390	CASE DEFAULT
	391	WRITE( message_string, * ) 'unknown boundary condition ', &
	392	'bc_par_lr = "', TRIM( bc_par_lr ), '"'
	393	CALL message( 'lpm_init', 'PA0219', 1, 2, 0, 6, 0 )
	394
	395	END SELECT
	396	SELECT CASE ( bc_par_ns )
	397
	398	CASE ( 'cyclic' )
	399	ibc_par_ns = 0
	400
	401	CASE ( 'absorb' )
	402	ibc_par_ns = 1
	403
	404	CASE ( 'reflect' )
	405	ibc_par_ns = 2
	406
	407	CASE DEFAULT
	408	WRITE( message_string, * ) 'unknown boundary condition ', &
	409	'bc_par_ns = "', TRIM( bc_par_ns ), '"'
	410	CALL message( 'lpm_init', 'PA0220', 1, 2, 0, 6, 0 )
	411
	412	END SELECT
	413
	414	!
[828]	415	!-- Initialize collision kernels
	416	IF ( collision_kernel /= 'none' ) CALL init_kernels
	417
	418	!
[1]	419	!-- For the first model run of a possible job chain initialize the
[849]	420	!-- particles, otherwise read the particle data from restart file.
[1]	421	IF ( TRIM( initializing_actions ) == 'read_restart_data' &
	422	.AND. read_particles_from_restartfile ) THEN
	423
[849]	424	CALL lpm_read_restart_file
[1]	425
	426	ELSE
	427
	428	!
	429	!-- Allocate particle arrays and set attributes of the initial set of
	430	!-- particles, which can be also periodically released at later times.
	431	!-- Also allocate array for particle tail coordinates, if needed.
[1359]	432	ALLOCATE( prt_count(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
	433	grid_particles(nzb+1:nzt,nys:nyn,nxl:nxr) )
[1]	434
[1359]	435	maximum_number_of_particles = 0
	436	number_of_particles = 0
[792]	437
	438	sort_count = 0
[1359]	439	prt_count = 0
[792]	440
[1]	441	!
	442	!-- Initialize all particles with dummy values (otherwise errors may
	443	!-- occur within restart runs). The reason for this is still not clear
	444	!-- and may be presumably caused by errors in the respective user-interface.
[1359]	445	#if defined( __twocachelines )
	446	zero_particle = particle_type( 0.0_wp, 0.0_sp, 0.0_sp, 0.0_sp, 0.0_sp, &
	447	0.0_sp, 0.0_sp, 0.0_wp, 0.0_wp, 0.0_wp, &
	448	0, .FALSE., 0.0_wp, 0.0_wp, 0.0_wp, &
	449	0.0_sp, 0.0_sp, 0.0_sp, 0.0_sp, 0.0_sp, &
	450	0.0_sp, 0, 0, 0, -1)
	451	#else
	452	zero_particle = particle_type( 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	453	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	454	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	455	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0, 0, 0, &
	456	0, .FALSE., -1)
	457	#endif
	458	particle_groups = particle_groups_type( 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp )
[1]	459
	460	!
	461	!-- Set the default particle size used for dvrp plots
[1359]	462	IF ( dvrp_psize == 9999999.9_wp ) dvrp_psize = 0.2_wp * dx
[1]	463
	464	!
	465	!-- Set values for the density ratio and radius for all particle
	466	!-- groups, if necessary
[1359]	467	IF ( density_ratio(1) == 9999999.9_wp ) density_ratio(1) = 0.0_wp
	468	IF ( radius(1) == 9999999.9_wp ) radius(1) = 0.0_wp
[1]	469	DO i = 2, number_of_particle_groups
[1359]	470	IF ( density_ratio(i) == 9999999.9_wp ) THEN
[1]	471	density_ratio(i) = density_ratio(i-1)
	472	ENDIF
[1359]	473	IF ( radius(i) == 9999999.9_wp ) radius(i) = radius(i-1)
[1]	474	ENDDO
	475
	476	DO i = 1, number_of_particle_groups
[1359]	477	IF ( density_ratio(i) /= 0.0_wp .AND. radius(i) == 0 ) THEN
[254]	478	WRITE( message_string, * ) 'particle group #', i, 'has a', &
	479	'density ratio /= 0 but radius = 0'
[849]	480	CALL message( 'lpm_init', 'PA0215', 1, 2, 0, 6, 0 )
[1]	481	ENDIF
	482	particle_groups(i)%density_ratio = density_ratio(i)
	483	particle_groups(i)%radius = radius(i)
	484	ENDDO
	485
	486	!
[1359]	487	!-- Set a seed value for the random number generator to be exclusively
	488	!-- used for the particle code. The generated random numbers should be
	489	!-- different on the different PEs.
	490	iran_part = iran_part + myid
	491
[1725]	492	CALL lpm_create_particle (PHASE_INIT)
	493
[1359]	494	!
	495	!-- User modification of initial particles
	496	CALL user_lpm_init
	497
	498	!
	499	!-- Open file for statistical informations about particle conditions
	500	IF ( write_particle_statistics ) THEN
	501	CALL check_open( 80 )
	502	WRITE ( 80, 8000 ) current_timestep_number, simulated_time, &
	503	number_of_particles, &
	504	maximum_number_of_particles
	505	CALL close_file( 80 )
	506	ENDIF
	507
	508	!
	509	!-- Check if particles are really uniform in color and radius (dvrp_size)
	510	!-- (uniform_particles is preset TRUE)
	511	IF ( uniform_particles ) THEN
	512	DO ip = nxl, nxr
	513	DO jp = nys, nyn
	514	DO kp = nzb+1, nzt
	515
	516	n = prt_count(kp,jp,ip)
	517	IF ( MINVAL( grid_particles(kp,jp,ip)%particles(1:n)%dvrp_psize ) == &
	518	MAXVAL( grid_particles(kp,jp,ip)%particles(1:n)%dvrp_psize ) .AND. &
	519	MINVAL( grid_particles(kp,jp,ip)%particles(1:n)%class ) == &
	520	MAXVAL( grid_particles(kp,jp,ip)%particles(1:n)%class ) ) THEN
	521	uniform_particles_l = .TRUE.
	522	ELSE
	523	uniform_particles_l = .FALSE.
	524	ENDIF
	525
	526	ENDDO
	527	ENDDO
	528	ENDDO
	529
	530	#if defined( __parallel )
	531	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
	532	CALL MPI_ALLREDUCE( uniform_particles_l, uniform_particles, 1, &
	533	MPI_LOGICAL, MPI_LAND, comm2d, ierr )
	534	#else
	535	uniform_particles = uniform_particles_l
	536	#endif
	537
	538	ENDIF
	539
	540	!
	541	!-- Particles will probably become none-uniform, if their size and color
	542	!-- will be determined by flow variables
	543	IF ( particle_color /= 'none' .OR. particle_dvrpsize /= 'none' ) THEN
	544	uniform_particles = .FALSE.
	545	ENDIF
	546
	547	! !kk Not implemented aft individual particle array fort every gridcell
	548	! !
	549	! !-- Set the beginning of the particle tails and their age
	550	! IF ( use_particle_tails ) THEN
	551	! !
	552	! !-- Choose the maximum number of tails with respect to the maximum number
	553	! !-- of particles and skip_particles_for_tail
	554	! maximum_number_of_tails = maximum_number_of_particles / &
	555	! skip_particles_for_tail
	556	!
	557	! !
	558	! !-- Create a minimum number of tails in case that there is no tail
	559	! !-- initially (otherwise, index errors will occur when adressing the
	560	! !-- arrays below)
	561	! IF ( maximum_number_of_tails == 0 ) maximum_number_of_tails = 10
	562	!
	563	! ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, &
	564	! maximum_number_of_tails), &
	565	! new_tail_id(maximum_number_of_tails), &
	566	! tail_mask(maximum_number_of_tails) )
	567	!
	568	! particle_tail_coordinates = 0.0_wp
	569	! minimum_tailpoint_distance = minimum_tailpoint_distance**2
	570	! number_of_initial_tails = number_of_tails
	571	!
	572	! nn = 0
	573	! DO n = 1, number_of_particles
	574	! !
	575	! !-- Only for those particles marked above with a provisional tail_id
	576	! !-- tails will be created. Particles now get their final tail_id.
	577	! IF ( particles(n)%tail_id /= 0 ) THEN
	578	!
	579	! nn = nn + 1
	580	! particles(n)%tail_id = nn
	581	!
	582	! particle_tail_coordinates(1,1,nn) = particles(n)%x
	583	! particle_tail_coordinates(1,2,nn) = particles(n)%y
	584	! particle_tail_coordinates(1,3,nn) = particles(n)%z
	585	! particle_tail_coordinates(1,4,nn) = particles(n)%class
	586	! particles(n)%tailpoints = 1
	587	! IF ( minimum_tailpoint_distance /= 0.0_wp ) THEN
	588	! particle_tail_coordinates(2,1,nn) = particles(n)%x
	589	! particle_tail_coordinates(2,2,nn) = particles(n)%y
	590	! particle_tail_coordinates(2,3,nn) = particles(n)%z
	591	! particle_tail_coordinates(2,4,nn) = particles(n)%class
	592	! particle_tail_coordinates(1:2,5,nn) = 0.0_wp
	593	! particles(n)%tailpoints = 2
	594	! ENDIF
	595	!
	596	! ENDIF
	597	! ENDDO
	598	! ENDIF
	599	!
	600	! !
	601	! !-- Plot initial positions of particles (only if particle advection is
	602	! !-- switched on from the beginning of the simulation (t=0))
	603	! IF ( particle_advection_start == 0.0_wp ) CALL data_output_dvrp
	604
	605	ENDIF
	606
	607	!
	608	!-- To avoid programm abort, assign particles array to the local version of
	609	!-- first grid cell
	610	number_of_particles = prt_count(nzb+1,nys,nxl)
	611	particles => grid_particles(nzb+1,nys,nxl)%particles(1:number_of_particles)
	612
	613	!
	614	!-- Formats
	615	8000 FORMAT (I6,1X,F7.2,4X,I10,71X,I10)
	616
	617	END SUBROUTINE lpm_init
	618
[1682]	619	!------------------------------------------------------------------------------!
	620	! Description:
	621	! ------------
	622	!> @todo Missing subroutine description.
	623	!------------------------------------------------------------------------------!
[1359]	624	SUBROUTINE lpm_create_particle (phase)
	625
	626	USE lpm_exchange_horiz_mod, &
	627	ONLY: lpm_exchange_horiz, lpm_move_particle, realloc_particles_array
	628
	629	USE lpm_pack_arrays_mod, &
	630	ONLY: lpm_pack_all_arrays
	631
	632	IMPLICIT NONE
	633
[1682]	634	INTEGER(iwp) :: alloc_size !<
	635	INTEGER(iwp) :: i !<
	636	INTEGER(iwp) :: ip !<
	637	INTEGER(iwp) :: j !<
	638	INTEGER(iwp) :: jp !<
	639	INTEGER(iwp) :: kp !<
	640	INTEGER(iwp) :: loop_stride !<
	641	INTEGER(iwp) :: n !<
	642	INTEGER(iwp) :: new_size !<
	643	INTEGER(iwp) :: nn !<
[1359]	644
[1682]	645	INTEGER(iwp), INTENT(IN) :: phase !<
[1359]	646
[1682]	647	INTEGER(iwp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: local_count !<
	648	INTEGER(iwp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: local_start !<
[1359]	649
[1682]	650	LOGICAL :: first_stride !<
[1359]	651
[1682]	652	REAL(wp) :: pos_x !<
	653	REAL(wp) :: pos_y !<
	654	REAL(wp) :: pos_z !<
[1359]	655
[1682]	656	TYPE(particle_type),TARGET :: tmp_particle !<
[1359]	657
	658	!
	659	!-- Calculate particle positions and store particle attributes, if
	660	!-- particle is situated on this PE
	661	DO loop_stride = 1, 2
	662	first_stride = (loop_stride == 1)
	663	IF ( first_stride ) THEN
	664	local_count = 0 ! count number of particles
	665	ELSE
	666	local_count = prt_count ! Start address of new particles
	667	ENDIF
	668
[1]	669	n = 0
	670	DO i = 1, number_of_particle_groups
	671
	672	pos_z = psb(i)
	673
	674	DO WHILE ( pos_z <= pst(i) )
	675
	676	pos_y = pss(i)
	677
	678	DO WHILE ( pos_y <= psn(i) )
	679
[1359]	680	IF ( pos_y >= ( nys - 0.5_wp ) * dy .AND. &
	681	pos_y < ( nyn + 0.5_wp ) * dy ) THEN
[1]	682
	683	pos_x = psl(i)
	684
[1575]	685	xloop: DO WHILE ( pos_x <= psr(i) )
[1]	686
[1359]	687	IF ( pos_x >= ( nxl - 0.5_wp ) * dx .AND. &
	688	pos_x < ( nxr + 0.5_wp ) * dx ) THEN
[1]	689
	690	DO j = 1, particles_per_point
	691
	692	n = n + 1
[1359]	693	#if defined( __twocachelines )
	694	tmp_particle%x = pos_x
	695	tmp_particle%y = pos_y
	696	tmp_particle%z = pos_z
	697	tmp_particle%age = 0.0_sp
	698	tmp_particle%age_m = 0.0_sp
	699	tmp_particle%dt_sum = 0.0_wp
	700	tmp_particle%dvrp_psize = dvrp_psize
	701	tmp_particle%e_m = 0.0_sp
	702	IF ( curvature_solution_effects ) THEN
	703	!
	704	!-- Initial values (internal timesteps, derivative)
	705	!-- for Rosenbrock method
	706	tmp_particle%rvar1 = 1.0E-12_wp
	707	tmp_particle%rvar2 = 1.0E-3_wp
	708	tmp_particle%rvar3 = -9999999.9_wp
	709	ELSE
	710	!
	711	!-- Initial values for SGS velocities
	712	tmp_particle%rvar1 = 0.0_wp
	713	tmp_particle%rvar2 = 0.0_wp
	714	tmp_particle%rvar3 = 0.0_wp
[1]	715	ENDIF
[1359]	716	tmp_particle%speed_x = 0.0_sp
	717	tmp_particle%speed_y = 0.0_sp
	718	tmp_particle%speed_z = 0.0_sp
	719	tmp_particle%origin_x = pos_x
	720	tmp_particle%origin_y = pos_y
	721	tmp_particle%origin_z = pos_z
	722	tmp_particle%radius = particle_groups(i)%radius
	723	tmp_particle%weight_factor = initial_weighting_factor
	724	tmp_particle%class = 1
	725	tmp_particle%group = i
	726	tmp_particle%tailpoints = 0
	727	tmp_particle%particle_mask = .TRUE.
	728	#else
	729	tmp_particle%x = pos_x
	730	tmp_particle%y = pos_y
	731	tmp_particle%z = pos_z
	732	tmp_particle%age = 0.0_wp
	733	tmp_particle%age_m = 0.0_wp
	734	tmp_particle%dt_sum = 0.0_wp
	735	tmp_particle%dvrp_psize = dvrp_psize
	736	tmp_particle%e_m = 0.0_wp
[824]	737	IF ( curvature_solution_effects ) THEN
	738	!
	739	!-- Initial values (internal timesteps, derivative)
	740	!-- for Rosenbrock method
[1359]	741	tmp_particle%rvar1 = 1.0E-12_wp
	742	tmp_particle%rvar2 = 1.0E-3_wp
	743	tmp_particle%rvar3 = -9999999.9_wp
[824]	744	ELSE
	745	!
	746	!-- Initial values for SGS velocities
[1359]	747	tmp_particle%rvar1 = 0.0_wp
	748	tmp_particle%rvar2 = 0.0_wp
	749	tmp_particle%rvar3 = 0.0_wp
[824]	750	ENDIF
[1359]	751	tmp_particle%speed_x = 0.0_wp
	752	tmp_particle%speed_y = 0.0_wp
	753	tmp_particle%speed_z = 0.0_wp
	754	tmp_particle%origin_x = pos_x
	755	tmp_particle%origin_y = pos_y
	756	tmp_particle%origin_z = pos_z
	757	tmp_particle%radius = particle_groups(i)%radius
	758	tmp_particle%weight_factor = initial_weighting_factor
	759	tmp_particle%class = 1
	760	tmp_particle%group = i
	761	tmp_particle%tailpoints = 0
	762	tmp_particle%particle_mask = .TRUE.
	763	#endif
[1]	764	IF ( use_particle_tails .AND. &
	765	MOD( n, skip_particles_for_tail ) == 0 ) THEN
	766	number_of_tails = number_of_tails + 1
	767	!
	768	!-- This is a temporary provisional setting (see
	769	!-- further below!)
[1359]	770	tmp_particle%tail_id = number_of_tails
[1]	771	ELSE
[1359]	772	tmp_particle%tail_id = 0
[1]	773	ENDIF
[1575]	774	!
	775	!-- Determine the grid indices of the particle position
[1359]	776	ip = ( tmp_particle%x + 0.5_wp * dx ) * ddx
	777	jp = ( tmp_particle%y + 0.5_wp * dy ) * ddy
[1685]	778	kp = tmp_particle%z / dz + 1 + offset_ocean_nzt
[1]	779
[1575]	780	IF ( seed_follows_topography ) THEN
	781	!
	782	!-- Particle height is given relative to topography
	783	kp = kp + nzb_w_inner(jp,ip)
	784	tmp_particle%z = tmp_particle%z + zw(kp)
	785	IF ( kp > nzt ) THEN
	786	pos_x = pos_x + pdx(i)
	787	CYCLE xloop
	788	ENDIF
	789	ENDIF
	790
[1359]	791	local_count(kp,jp,ip) = local_count(kp,jp,ip) + 1
	792	IF ( .NOT. first_stride ) THEN
	793	IF ( ip < nxl .OR. jp < nys .OR. kp < nzb+1 ) THEN
	794	write(6,*) 'xl ',ip,jp,kp,nxl,nys,nzb+1
	795	ENDIF
	796	IF ( ip > nxr .OR. jp > nyn .OR. kp > nzt ) THEN
	797	write(6,*) 'xu ',ip,jp,kp,nxr,nyn,nzt
	798	ENDIF
	799	grid_particles(kp,jp,ip)%particles(local_count(kp,jp,ip)) = tmp_particle
	800	ENDIF
[1]	801	ENDDO
	802
	803	ENDIF
	804
	805	pos_x = pos_x + pdx(i)
	806
[1575]	807	ENDDO xloop
[1]	808
	809	ENDIF
	810
	811	pos_y = pos_y + pdy(i)
	812
	813	ENDDO
	814
	815	pos_z = pos_z + pdz(i)
	816
	817	ENDDO
	818
	819	ENDDO
	820
[1359]	821	IF ( first_stride ) THEN
	822	DO ip = nxl, nxr
	823	DO jp = nys, nyn
	824	DO kp = nzb+1, nzt
	825	IF ( phase == PHASE_INIT ) THEN
	826	IF ( local_count(kp,jp,ip) > 0 ) THEN
	827	alloc_size = MAX( INT( local_count(kp,jp,ip) * &
	828	( 1.0_wp + alloc_factor / 100.0_wp ) ), &
	829	min_nr_particle )
	830	ELSE
	831	alloc_size = min_nr_particle
	832	ENDIF
	833	ALLOCATE(grid_particles(kp,jp,ip)%particles(1:alloc_size))
	834	DO n = 1, alloc_size
	835	grid_particles(kp,jp,ip)%particles(n) = zero_particle
	836	ENDDO
	837	ELSEIF ( phase == PHASE_RELEASE ) THEN
	838	IF ( local_count(kp,jp,ip) > 0 ) THEN
	839	new_size = local_count(kp,jp,ip) + prt_count(kp,jp,ip)
	840	alloc_size = MAX( INT( new_size * ( 1.0_wp + &
	841	alloc_factor / 100.0_wp ) ), min_nr_particle )
	842	IF( alloc_size > SIZE( grid_particles(kp,jp,ip)%particles) ) THEN
	843	CALL realloc_particles_array(ip,jp,kp,alloc_size)
	844	ENDIF
	845	ENDIF
	846	ENDIF
	847	ENDDO
	848	ENDDO
	849	ENDDO
	850	ENDIF
	851	ENDDO
[1]	852
[1359]	853	local_start = prt_count+1
	854	prt_count = local_count
[1]	855	!
[1359]	856	!-- Add random fluctuation to particle positions
	857	IF ( random_start_position ) THEN
	858	DO ip = nxl, nxr
	859	DO jp = nys, nyn
	860	DO kp = nzb+1, nzt
	861	number_of_particles = prt_count(kp,jp,ip)
	862	IF ( number_of_particles <= 0 ) CYCLE
	863	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
[1]	864
[1359]	865	DO n = local_start(kp,jp,ip), number_of_particles !Move only new particles
	866	IF ( psl(particles(n)%group) /= psr(particles(n)%group) ) THEN
	867	particles(n)%x = particles(n)%x + &
	868	( random_function( iran_part ) - 0.5_wp ) * &
	869	pdx(particles(n)%group)
	870	ENDIF
	871	IF ( pss(particles(n)%group) /= psn(particles(n)%group) ) THEN
	872	particles(n)%y = particles(n)%y + &
	873	( random_function( iran_part ) - 0.5_wp ) * &
	874	pdy(particles(n)%group)
	875	ENDIF
	876	IF ( psb(particles(n)%group) /= pst(particles(n)%group) ) THEN
	877	particles(n)%z = particles(n)%z + &
	878	( random_function( iran_part ) - 0.5_wp ) * &
	879	pdz(particles(n)%group)
	880	ENDIF
	881	ENDDO
[1]	882	!
[1359]	883	!-- Identify particles located outside the model domain
	884	CALL lpm_boundary_conds( 'bottom/top' )
	885	ENDDO
	886	ENDDO
	887	ENDDO
[1]	888	!
[1359]	889	!-- Exchange particles between grid cells and processors
	890	CALL lpm_move_particle
	891	CALL lpm_exchange_horiz
[1]	892
[1359]	893	ENDIF
[1]	894	!
[1359]	895	!-- In case of random_start_position, delete particles identified by
	896	!-- lpm_exchange_horiz and lpm_boundary_conds. Then sort particles into blocks,
	897	!-- which is needed for a fast interpolation of the LES fields on the particle
	898	!-- position.
	899	CALL lpm_pack_all_arrays
[1]	900
	901	!
[1359]	902	!-- Determine maximum number of particles (i.e., all possible particles that
	903	!-- have been allocated) and the current number of particles
	904	DO ip = nxl, nxr
	905	DO jp = nys, nyn
	906	DO kp = nzb+1, nzt
	907	maximum_number_of_particles = maximum_number_of_particles &
	908	+ SIZE(grid_particles(kp,jp,ip)%particles)
	909	number_of_particles = number_of_particles &
	910	+ prt_count(kp,jp,ip)
[1]	911	ENDDO
[1359]	912	ENDDO
	913	ENDDO
[1]	914	!
[1359]	915	!-- Calculate the number of particles and tails of the total domain
[1]	916	#if defined( __parallel )
[1359]	917	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
	918	CALL MPI_ALLREDUCE( number_of_particles, total_number_of_particles, 1, &
	919	MPI_INTEGER, MPI_SUM, comm2d, ierr )
	920	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
	921	CALL MPI_ALLREDUCE( number_of_tails, total_number_of_tails, 1, &
	922	MPI_INTEGER, MPI_SUM, comm2d, ierr )
[1]	923	#else
[1359]	924	total_number_of_particles = number_of_particles
	925	total_number_of_tails = number_of_tails
[1]	926	#endif
	927
[1359]	928	RETURN
[1]	929
[1359]	930	END SUBROUTINE lpm_create_particle
[336]	931
[1359]	932	END MODULE lpm_init_mod

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