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source: palm/trunk/SOURCE/lpm_init_mod.f90 @ 1850

Last change on this file since 1850 was 1850, checked in by maronga, 9 years ago
added _mod string to several filenames to meet the naming convection for modules
Property svn:keywords set to `Id`
File size: 28.4 KB

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[1850]	1	!> @file lpm_init_mod.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	!
[1818]	16	! Copyright 1997-2016 Leibniz Universitaet Hannover
[1036]	17	!--------------------------------------------------------------------------------!
	18	!
[254]	19	! Current revisions:
[1]	20	! -----------------
[1850]	21	! Module renamed
[1784]	22	!
[1832]	23	!
[1321]	24	! Former revisions:
	25	! -----------------
	26	! $Id: lpm_init_mod.f90 1850 2016-04-08 13:29:27Z maronga $
	27	!
[1832]	28	! 1831 2016-04-07 13:15:51Z hoffmann
	29	! curvature_solution_effects moved to particle_attributes
	30	!
[1823]	31	! 1822 2016-04-07 07:49:42Z hoffmann
	32	! Unused variables removed.
	33	!
[1784]	34	! 1783 2016-03-06 18:36:17Z raasch
	35	! netcdf module added
	36	!
[1726]	37	! 1725 2015-11-17 13:01:51Z hoffmann
	38	! Bugfix: Processor-dependent seed for random function is generated before it is
	39	! used.
	40	!
[1692]	41	! 1691 2015-10-26 16:17:44Z maronga
	42	! Renamed prandtl_layer to constant_flux_layer.
	43	!
[1686]	44	! 1685 2015-10-08 07:32:13Z raasch
	45	! bugfix concerning vertical index offset in case of ocean
	46	!
[1683]	47	! 1682 2015-10-07 23:56:08Z knoop
	48	! Code annotations made doxygen readable
	49	!
[1576]	50	! 1575 2015-03-27 09:56:27Z raasch
	51	! initial vertical particle position is allowed to follow the topography
	52	!
[1360]	53	! 1359 2014-04-11 17:15:14Z hoffmann
	54	! New particle structure integrated.
	55	! Kind definition added to all floating point numbers.
	56	! lpm_init changed form a subroutine to a module.
	57	!
[1329]	58	! 1327 2014-03-21 11:00:16Z raasch
	59	! -netcdf_output
	60	!
[1323]	61	! 1322 2014-03-20 16:38:49Z raasch
	62	! REAL functions provided with KIND-attribute
	63	!
[1321]	64	! 1320 2014-03-20 08:40:49Z raasch
[1320]	65	! ONLY-attribute added to USE-statements,
	66	! kind-parameters added to all INTEGER and REAL declaration statements,
	67	! kinds are defined in new module kinds,
	68	! revision history before 2012 removed,
	69	! comment fields (!:) to be used for variable explanations added to
	70	! all variable declaration statements
	71	! bugfix: #if defined( __parallel ) added
[850]	72	!
[1315]	73	! 1314 2014-03-14 18:25:17Z suehring
	74	! Vertical logarithmic interpolation of horizontal particle speed for particles
	75	! between roughness height and first vertical grid level.
	76	!
[1093]	77	! 1092 2013-02-02 11:24:22Z raasch
	78	! unused variables removed
	79	!
[1037]	80	! 1036 2012-10-22 13:43:42Z raasch
	81	! code put under GPL (PALM 3.9)
	82	!
[850]	83	! 849 2012-03-15 10:35:09Z raasch
[849]	84	! routine renamed: init_particles -> lpm_init
	85	! de_dx, de_dy, de_dz are allocated here (instead of automatic arrays in
	86	! advec_particles),
	87	! sort_particles renamed lpm_sort_arrays, user_init_particles renamed lpm_init
[392]	88	!
[829]	89	! 828 2012-02-21 12:00:36Z raasch
	90	! call of init_kernels, particle feature color renamed class
	91	!
[826]	92	! 824 2012-02-17 09:09:57Z raasch
	93	! particle attributes speed_x\|y\|z_sgs renamed rvar1\|2\|3,
	94	! array particles implemented as pointer
	95	!
[668]	96	! 667 2010-12-23 12:06:00Z suehring/gryschka
	97	! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng for allocation
	98	! of arrays.
	99	!
[1]	100	! Revision 1.1 1999/11/25 16:22:38 raasch
	101	! Initial revision
	102	!
	103	!
	104	! Description:
	105	! ------------
[1682]	106	!> This routine initializes a set of particles and their attributes (position,
	107	!> radius, ..) which are used by the Lagrangian particle model (see lpm).
[1]	108	!------------------------------------------------------------------------------!
[1682]	109	MODULE lpm_init_mod
	110
[1]	111
[1320]	112	USE arrays_3d, &
	113	ONLY: de_dx, de_dy, de_dz, zu, zw, z0
	114
	115	USE control_parameters, &
[1691]	116	ONLY: cloud_droplets, constant_flux_layer, current_timestep_number, &
[1783]	117	dz, initializing_actions, message_string, ocean, simulated_time
[1320]	118
	119	USE grid_variables, &
[1359]	120	ONLY: ddx, dx, ddy, dy
[1320]	121
	122	USE indices, &
[1575]	123	ONLY: nx, nxl, nxlg, nxrg, nxr, ny, nyn, nys, nyng, nysg, nz, nzb, &
	124	nzb_w_inner, nzt
[1320]	125
	126	USE kinds
	127
	128	USE lpm_collision_kernels_mod, &
	129	ONLY: init_kernels
	130
[1783]	131	USE netcdf_interface, &
	132	ONLY: netcdf_data_format
	133
[1320]	134	USE particle_attributes, &
[1359]	135	ONLY: alloc_factor, bc_par_b, bc_par_lr, bc_par_ns, bc_par_t, &
	136	block_offset, block_offset_def, collision_kernel, &
[1831]	137	curvature_solution_effects, &
[1822]	138	density_ratio, grid_particles, &
[1359]	139	initial_weighting_factor, ibc_par_b, ibc_par_lr, ibc_par_ns, &
	140	ibc_par_t, iran_part, log_z_z0, &
	141	max_number_of_particle_groups, maximum_number_of_particles, &
[1822]	142	min_nr_particle, mpi_particle_type, &
	143	number_of_particles, &
[1320]	144	number_of_particle_groups, number_of_sublayers, &
[1822]	145	offset_ocean_nzt, offset_ocean_nzt_m1, &
[1359]	146	particles, particle_advection_start, particle_groups, &
	147	particle_groups_type, particles_per_point, &
[1822]	148	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,&
[1822]	151	seed_follows_topography, sort_count, &
	152	total_number_of_particles, &
	153	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) :: j !<
	195	INTEGER(iwp) :: k !<
[1320]	196
[1]	197	#if defined( __parallel )
[1682]	198	INTEGER(iwp), DIMENSION(3) :: blocklengths !<
	199	INTEGER(iwp), DIMENSION(3) :: displacements !<
	200	INTEGER(iwp), DIMENSION(3) :: types !<
[1]	201	#endif
	202
[1682]	203	REAL(wp) :: height_int !<
	204	REAL(wp) :: height_p !<
	205	REAL(wp) :: z_p !<
	206	REAL(wp) :: z0_av_local !<
[1]	207
	208	#if defined( __parallel )
	209	!
	210	!-- Define MPI derived datatype for FORTRAN datatype particle_type (see module
[82]	211	!-- particle_attributes). Integer length is 4 byte, Real is 8 byte
[1359]	212	blocklengths(1) = 19; blocklengths(2) = 6; blocklengths(3) = 1
	213	displacements(1) = 0; displacements(2) = 152; displacements(3) = 176
	214
[1]	215	types(1) = MPI_REAL
	216	types(2) = MPI_INTEGER
	217	types(3) = MPI_UB
	218	CALL MPI_TYPE_STRUCT( 3, blocklengths, displacements, types, &
	219	mpi_particle_type, ierr )
	220	CALL MPI_TYPE_COMMIT( mpi_particle_type, ierr )
	221	#endif
	222
	223	!
[150]	224	!-- In case of oceans runs, the vertical index calculations need an offset,
	225	!-- because otherwise the k indices will become negative
	226	IF ( ocean ) THEN
	227	offset_ocean_nzt = nzt
	228	offset_ocean_nzt_m1 = nzt - 1
	229	ENDIF
	230
[1359]	231	!
	232	!-- Define block offsets for dividing a gridcell in 8 sub cells
[150]	233
[1359]	234	block_offset(0) = block_offset_def (-1,-1,-1)
	235	block_offset(1) = block_offset_def (-1,-1, 0)
	236	block_offset(2) = block_offset_def (-1, 0,-1)
	237	block_offset(3) = block_offset_def (-1, 0, 0)
	238	block_offset(4) = block_offset_def ( 0,-1,-1)
	239	block_offset(5) = block_offset_def ( 0,-1, 0)
	240	block_offset(6) = block_offset_def ( 0, 0,-1)
	241	block_offset(7) = block_offset_def ( 0, 0, 0)
[150]	242	!
[1]	243	!-- Check the number of particle groups.
	244	IF ( number_of_particle_groups > max_number_of_particle_groups ) THEN
[274]	245	WRITE( message_string, * ) 'max_number_of_particle_groups =', &
	246	max_number_of_particle_groups , &
[254]	247	'&number_of_particle_groups reset to ', &
	248	max_number_of_particle_groups
[849]	249	CALL message( 'lpm_init', 'PA0213', 0, 1, 0, 6, 0 )
[1]	250	number_of_particle_groups = max_number_of_particle_groups
	251	ENDIF
	252
	253	!
	254	!-- Set default start positions, if necessary
[1359]	255	IF ( psl(1) == 9999999.9_wp ) psl(1) = -0.5_wp * dx
	256	IF ( psr(1) == 9999999.9_wp ) psr(1) = ( nx + 0.5_wp ) * dx
	257	IF ( pss(1) == 9999999.9_wp ) pss(1) = -0.5_wp * dy
	258	IF ( psn(1) == 9999999.9_wp ) psn(1) = ( ny + 0.5_wp ) * dy
	259	IF ( psb(1) == 9999999.9_wp ) psb(1) = zu(nz/2)
	260	IF ( pst(1) == 9999999.9_wp ) pst(1) = psb(1)
[1]	261
[1359]	262	IF ( pdx(1) == 9999999.9_wp .OR. pdx(1) == 0.0_wp ) pdx(1) = dx
	263	IF ( pdy(1) == 9999999.9_wp .OR. pdy(1) == 0.0_wp ) pdy(1) = dy
	264	IF ( pdz(1) == 9999999.9_wp .OR. pdz(1) == 0.0_wp ) pdz(1) = zu(2) - zu(1)
[1]	265
	266	DO j = 2, number_of_particle_groups
[1359]	267	IF ( psl(j) == 9999999.9_wp ) psl(j) = psl(j-1)
	268	IF ( psr(j) == 9999999.9_wp ) psr(j) = psr(j-1)
	269	IF ( pss(j) == 9999999.9_wp ) pss(j) = pss(j-1)
	270	IF ( psn(j) == 9999999.9_wp ) psn(j) = psn(j-1)
	271	IF ( psb(j) == 9999999.9_wp ) psb(j) = psb(j-1)
	272	IF ( pst(j) == 9999999.9_wp ) pst(j) = pst(j-1)
	273	IF ( pdx(j) == 9999999.9_wp .OR. pdx(j) == 0.0_wp ) pdx(j) = pdx(j-1)
	274	IF ( pdy(j) == 9999999.9_wp .OR. pdy(j) == 0.0_wp ) pdy(j) = pdy(j-1)
	275	IF ( pdz(j) == 9999999.9_wp .OR. pdz(j) == 0.0_wp ) pdz(j) = pdz(j-1)
[1]	276	ENDDO
	277
	278	!
[849]	279	!-- Allocate arrays required for calculating particle SGS velocities
[1822]	280	IF ( use_sgs_for_particles .AND. .NOT. cloud_droplets ) THEN
[849]	281	ALLOCATE( de_dx(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
	282	de_dy(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
	283	de_dz(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	284	ENDIF
	285
	286	!
[1314]	287	!-- Allocate array required for logarithmic vertical interpolation of
	288	!-- horizontal particle velocities between the surface and the first vertical
	289	!-- grid level. In order to avoid repeated CPU cost-intensive CALLS of
	290	!-- intrinsic FORTRAN procedure LOG(z/z0), LOG(z/z0) is precalculated for
	291	!-- several heights. Splitting into 20 sublayers turned out to be sufficient.
	292	!-- To obtain exact height levels of particles, linear interpolation is applied
	293	!-- (see lpm_advec.f90).
[1691]	294	IF ( constant_flux_layer ) THEN
[1314]	295
	296	ALLOCATE ( log_z_z0(0:number_of_sublayers) )
	297	z_p = zu(nzb+1) - zw(nzb)
	298
	299	!
	300	!-- Calculate horizontal mean value of z0 used for logartihmic
	301	!-- interpolation. Note: this is not exact for heterogeneous z0.
	302	!-- However, sensitivity studies showed that the effect is
	303	!-- negligible.
	304	z0_av_local = SUM( z0(nys:nyn,nxl:nxr) )
[1359]	305	z0_av_global = 0.0_wp
[1314]	306
[1320]	307	#if defined( __parallel )
[1314]	308	CALL MPI_ALLREDUCE(z0_av_local, z0_av_global, 1, MPI_REAL, MPI_SUM, &
	309	comm2d, ierr )
[1320]	310	#else
	311	z0_av_global = z0_av_local
	312	#endif
[1314]	313
	314	z0_av_global = z0_av_global / ( ( ny + 1 ) * ( nx + 1 ) )
	315	!
	316	!-- Horizontal wind speed is zero below and at z0
[1359]	317	log_z_z0(0) = 0.0_wp
[1314]	318	!
	319	!-- Calculate vertical depth of the sublayers
[1322]	320	height_int = ( z_p - z0_av_global ) / REAL( number_of_sublayers, KIND=wp )
[1314]	321	!
	322	!-- Precalculate LOG(z/z0)
[1359]	323	height_p = 0.0_wp
[1314]	324	DO k = 1, number_of_sublayers
	325
	326	height_p = height_p + height_int
	327	log_z_z0(k) = LOG( height_p / z0_av_global )
	328
	329	ENDDO
	330
	331
	332	ENDIF
	333
	334	!
[1359]	335	!-- Check boundary condition and set internal variables
	336	SELECT CASE ( bc_par_b )
	337
	338	CASE ( 'absorb' )
	339	ibc_par_b = 1
	340
	341	CASE ( 'reflect' )
	342	ibc_par_b = 2
	343
	344	CASE DEFAULT
	345	WRITE( message_string, * ) 'unknown boundary condition ', &
	346	'bc_par_b = "', TRIM( bc_par_b ), '"'
	347	CALL message( 'lpm_init', 'PA0217', 1, 2, 0, 6, 0 )
	348
	349	END SELECT
	350	SELECT CASE ( bc_par_t )
	351
	352	CASE ( 'absorb' )
	353	ibc_par_t = 1
	354
	355	CASE ( 'reflect' )
	356	ibc_par_t = 2
	357
	358	CASE DEFAULT
	359	WRITE( message_string, * ) 'unknown boundary condition ', &
	360	'bc_par_t = "', TRIM( bc_par_t ), '"'
	361	CALL message( 'lpm_init', 'PA0218', 1, 2, 0, 6, 0 )
	362
	363	END SELECT
	364	SELECT CASE ( bc_par_lr )
	365
	366	CASE ( 'cyclic' )
	367	ibc_par_lr = 0
	368
	369	CASE ( 'absorb' )
	370	ibc_par_lr = 1
	371
	372	CASE ( 'reflect' )
	373	ibc_par_lr = 2
	374
	375	CASE DEFAULT
	376	WRITE( message_string, * ) 'unknown boundary condition ', &
	377	'bc_par_lr = "', TRIM( bc_par_lr ), '"'
	378	CALL message( 'lpm_init', 'PA0219', 1, 2, 0, 6, 0 )
	379
	380	END SELECT
	381	SELECT CASE ( bc_par_ns )
	382
	383	CASE ( 'cyclic' )
	384	ibc_par_ns = 0
	385
	386	CASE ( 'absorb' )
	387	ibc_par_ns = 1
	388
	389	CASE ( 'reflect' )
	390	ibc_par_ns = 2
	391
	392	CASE DEFAULT
	393	WRITE( message_string, * ) 'unknown boundary condition ', &
	394	'bc_par_ns = "', TRIM( bc_par_ns ), '"'
	395	CALL message( 'lpm_init', 'PA0220', 1, 2, 0, 6, 0 )
	396
	397	END SELECT
	398
	399	!
[828]	400	!-- Initialize collision kernels
	401	IF ( collision_kernel /= 'none' ) CALL init_kernels
	402
	403	!
[1]	404	!-- For the first model run of a possible job chain initialize the
[849]	405	!-- particles, otherwise read the particle data from restart file.
[1]	406	IF ( TRIM( initializing_actions ) == 'read_restart_data' &
	407	.AND. read_particles_from_restartfile ) THEN
	408
[849]	409	CALL lpm_read_restart_file
[1]	410
	411	ELSE
	412
	413	!
	414	!-- Allocate particle arrays and set attributes of the initial set of
	415	!-- particles, which can be also periodically released at later times.
[1359]	416	ALLOCATE( prt_count(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
	417	grid_particles(nzb+1:nzt,nys:nyn,nxl:nxr) )
[1]	418
[1359]	419	maximum_number_of_particles = 0
	420	number_of_particles = 0
[792]	421
	422	sort_count = 0
[1359]	423	prt_count = 0
[792]	424
[1]	425	!
	426	!-- Initialize all particles with dummy values (otherwise errors may
	427	!-- occur within restart runs). The reason for this is still not clear
	428	!-- and may be presumably caused by errors in the respective user-interface.
[1359]	429	zero_particle = particle_type( 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	430	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	431	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	432	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0, 0, 0, &
	433	0, .FALSE., -1)
[1822]	434
[1359]	435	particle_groups = particle_groups_type( 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp )
[1]	436
	437	!
	438	!-- Set values for the density ratio and radius for all particle
	439	!-- groups, if necessary
[1359]	440	IF ( density_ratio(1) == 9999999.9_wp ) density_ratio(1) = 0.0_wp
	441	IF ( radius(1) == 9999999.9_wp ) radius(1) = 0.0_wp
[1]	442	DO i = 2, number_of_particle_groups
[1359]	443	IF ( density_ratio(i) == 9999999.9_wp ) THEN
[1]	444	density_ratio(i) = density_ratio(i-1)
	445	ENDIF
[1359]	446	IF ( radius(i) == 9999999.9_wp ) radius(i) = radius(i-1)
[1]	447	ENDDO
	448
	449	DO i = 1, number_of_particle_groups
[1359]	450	IF ( density_ratio(i) /= 0.0_wp .AND. radius(i) == 0 ) THEN
[254]	451	WRITE( message_string, * ) 'particle group #', i, 'has a', &
	452	'density ratio /= 0 but radius = 0'
[849]	453	CALL message( 'lpm_init', 'PA0215', 1, 2, 0, 6, 0 )
[1]	454	ENDIF
	455	particle_groups(i)%density_ratio = density_ratio(i)
	456	particle_groups(i)%radius = radius(i)
	457	ENDDO
	458
	459	!
[1359]	460	!-- Set a seed value for the random number generator to be exclusively
	461	!-- used for the particle code. The generated random numbers should be
	462	!-- different on the different PEs.
	463	iran_part = iran_part + myid
	464
[1725]	465	CALL lpm_create_particle (PHASE_INIT)
	466
[1359]	467	!
	468	!-- User modification of initial particles
	469	CALL user_lpm_init
	470
	471	!
	472	!-- Open file for statistical informations about particle conditions
	473	IF ( write_particle_statistics ) THEN
	474	CALL check_open( 80 )
	475	WRITE ( 80, 8000 ) current_timestep_number, simulated_time, &
	476	number_of_particles, &
	477	maximum_number_of_particles
	478	CALL close_file( 80 )
	479	ENDIF
	480
	481	ENDIF
	482
	483	!
	484	!-- To avoid programm abort, assign particles array to the local version of
	485	!-- first grid cell
	486	number_of_particles = prt_count(nzb+1,nys,nxl)
	487	particles => grid_particles(nzb+1,nys,nxl)%particles(1:number_of_particles)
	488
	489	!
	490	!-- Formats
	491	8000 FORMAT (I6,1X,F7.2,4X,I10,71X,I10)
	492
	493	END SUBROUTINE lpm_init
	494
[1682]	495	!------------------------------------------------------------------------------!
	496	! Description:
	497	! ------------
	498	!> @todo Missing subroutine description.
	499	!------------------------------------------------------------------------------!
[1359]	500	SUBROUTINE lpm_create_particle (phase)
	501
	502	USE lpm_exchange_horiz_mod, &
	503	ONLY: lpm_exchange_horiz, lpm_move_particle, realloc_particles_array
	504
	505	USE lpm_pack_arrays_mod, &
	506	ONLY: lpm_pack_all_arrays
	507
	508	IMPLICIT NONE
	509
[1682]	510	INTEGER(iwp) :: alloc_size !<
	511	INTEGER(iwp) :: i !<
	512	INTEGER(iwp) :: ip !<
	513	INTEGER(iwp) :: j !<
	514	INTEGER(iwp) :: jp !<
	515	INTEGER(iwp) :: kp !<
	516	INTEGER(iwp) :: loop_stride !<
	517	INTEGER(iwp) :: n !<
	518	INTEGER(iwp) :: new_size !<
[1359]	519
[1682]	520	INTEGER(iwp), INTENT(IN) :: phase !<
[1359]	521
[1682]	522	INTEGER(iwp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: local_count !<
	523	INTEGER(iwp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: local_start !<
[1359]	524
[1682]	525	LOGICAL :: first_stride !<
[1359]	526
[1682]	527	REAL(wp) :: pos_x !<
	528	REAL(wp) :: pos_y !<
	529	REAL(wp) :: pos_z !<
[1359]	530
[1682]	531	TYPE(particle_type),TARGET :: tmp_particle !<
[1359]	532
	533	!
	534	!-- Calculate particle positions and store particle attributes, if
	535	!-- particle is situated on this PE
	536	DO loop_stride = 1, 2
	537	first_stride = (loop_stride == 1)
	538	IF ( first_stride ) THEN
	539	local_count = 0 ! count number of particles
	540	ELSE
	541	local_count = prt_count ! Start address of new particles
	542	ENDIF
	543
[1]	544	n = 0
	545	DO i = 1, number_of_particle_groups
	546
	547	pos_z = psb(i)
	548
	549	DO WHILE ( pos_z <= pst(i) )
	550
	551	pos_y = pss(i)
	552
	553	DO WHILE ( pos_y <= psn(i) )
	554
[1359]	555	IF ( pos_y >= ( nys - 0.5_wp ) * dy .AND. &
	556	pos_y < ( nyn + 0.5_wp ) * dy ) THEN
[1]	557
	558	pos_x = psl(i)
	559
[1575]	560	xloop: DO WHILE ( pos_x <= psr(i) )
[1]	561
[1359]	562	IF ( pos_x >= ( nxl - 0.5_wp ) * dx .AND. &
	563	pos_x < ( nxr + 0.5_wp ) * dx ) THEN
[1]	564
	565	DO j = 1, particles_per_point
	566
	567	n = n + 1
[1359]	568	tmp_particle%x = pos_x
	569	tmp_particle%y = pos_y
	570	tmp_particle%z = pos_z
	571	tmp_particle%age = 0.0_wp
	572	tmp_particle%age_m = 0.0_wp
	573	tmp_particle%dt_sum = 0.0_wp
[1822]	574	tmp_particle%dvrp_psize = 0.0_wp !unused
[1359]	575	tmp_particle%e_m = 0.0_wp
[824]	576	IF ( curvature_solution_effects ) THEN
	577	!
	578	!-- Initial values (internal timesteps, derivative)
	579	!-- for Rosenbrock method
[1359]	580	tmp_particle%rvar1 = 1.0E-12_wp
	581	tmp_particle%rvar2 = 1.0E-3_wp
	582	tmp_particle%rvar3 = -9999999.9_wp
[824]	583	ELSE
	584	!
	585	!-- Initial values for SGS velocities
[1359]	586	tmp_particle%rvar1 = 0.0_wp
	587	tmp_particle%rvar2 = 0.0_wp
	588	tmp_particle%rvar3 = 0.0_wp
[824]	589	ENDIF
[1359]	590	tmp_particle%speed_x = 0.0_wp
	591	tmp_particle%speed_y = 0.0_wp
	592	tmp_particle%speed_z = 0.0_wp
	593	tmp_particle%origin_x = pos_x
	594	tmp_particle%origin_y = pos_y
	595	tmp_particle%origin_z = pos_z
	596	tmp_particle%radius = particle_groups(i)%radius
	597	tmp_particle%weight_factor = initial_weighting_factor
	598	tmp_particle%class = 1
	599	tmp_particle%group = i
[1822]	600	tmp_particle%tailpoints = 0 !unused
[1359]	601	tmp_particle%particle_mask = .TRUE.
[1822]	602	tmp_particle%tail_id = 0 !unused
	603
[1]	604	!
[1575]	605	!-- Determine the grid indices of the particle position
[1359]	606	ip = ( tmp_particle%x + 0.5_wp * dx ) * ddx
	607	jp = ( tmp_particle%y + 0.5_wp * dy ) * ddy
[1685]	608	kp = tmp_particle%z / dz + 1 + offset_ocean_nzt
[1]	609
[1575]	610	IF ( seed_follows_topography ) THEN
	611	!
	612	!-- Particle height is given relative to topography
	613	kp = kp + nzb_w_inner(jp,ip)
	614	tmp_particle%z = tmp_particle%z + zw(kp)
	615	IF ( kp > nzt ) THEN
	616	pos_x = pos_x + pdx(i)
	617	CYCLE xloop
	618	ENDIF
	619	ENDIF
	620
[1359]	621	local_count(kp,jp,ip) = local_count(kp,jp,ip) + 1
	622	IF ( .NOT. first_stride ) THEN
	623	IF ( ip < nxl .OR. jp < nys .OR. kp < nzb+1 ) THEN
	624	write(6,*) 'xl ',ip,jp,kp,nxl,nys,nzb+1
	625	ENDIF
	626	IF ( ip > nxr .OR. jp > nyn .OR. kp > nzt ) THEN
	627	write(6,*) 'xu ',ip,jp,kp,nxr,nyn,nzt
	628	ENDIF
	629	grid_particles(kp,jp,ip)%particles(local_count(kp,jp,ip)) = tmp_particle
	630	ENDIF
[1]	631	ENDDO
	632
	633	ENDIF
	634
	635	pos_x = pos_x + pdx(i)
	636
[1575]	637	ENDDO xloop
[1]	638
	639	ENDIF
	640
	641	pos_y = pos_y + pdy(i)
	642
	643	ENDDO
	644
	645	pos_z = pos_z + pdz(i)
	646
	647	ENDDO
	648
	649	ENDDO
	650
[1359]	651	IF ( first_stride ) THEN
	652	DO ip = nxl, nxr
	653	DO jp = nys, nyn
	654	DO kp = nzb+1, nzt
	655	IF ( phase == PHASE_INIT ) THEN
	656	IF ( local_count(kp,jp,ip) > 0 ) THEN
	657	alloc_size = MAX( INT( local_count(kp,jp,ip) * &
	658	( 1.0_wp + alloc_factor / 100.0_wp ) ), &
	659	min_nr_particle )
	660	ELSE
	661	alloc_size = min_nr_particle
	662	ENDIF
	663	ALLOCATE(grid_particles(kp,jp,ip)%particles(1:alloc_size))
	664	DO n = 1, alloc_size
	665	grid_particles(kp,jp,ip)%particles(n) = zero_particle
	666	ENDDO
	667	ELSEIF ( phase == PHASE_RELEASE ) THEN
	668	IF ( local_count(kp,jp,ip) > 0 ) THEN
	669	new_size = local_count(kp,jp,ip) + prt_count(kp,jp,ip)
	670	alloc_size = MAX( INT( new_size * ( 1.0_wp + &
	671	alloc_factor / 100.0_wp ) ), min_nr_particle )
	672	IF( alloc_size > SIZE( grid_particles(kp,jp,ip)%particles) ) THEN
	673	CALL realloc_particles_array(ip,jp,kp,alloc_size)
	674	ENDIF
	675	ENDIF
	676	ENDIF
	677	ENDDO
	678	ENDDO
	679	ENDDO
	680	ENDIF
	681	ENDDO
[1]	682
[1359]	683	local_start = prt_count+1
	684	prt_count = local_count
[1]	685	!
[1359]	686	!-- Add random fluctuation to particle positions
	687	IF ( random_start_position ) THEN
	688	DO ip = nxl, nxr
	689	DO jp = nys, nyn
	690	DO kp = nzb+1, nzt
	691	number_of_particles = prt_count(kp,jp,ip)
	692	IF ( number_of_particles <= 0 ) CYCLE
	693	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
[1]	694
[1359]	695	DO n = local_start(kp,jp,ip), number_of_particles !Move only new particles
	696	IF ( psl(particles(n)%group) /= psr(particles(n)%group) ) THEN
	697	particles(n)%x = particles(n)%x + &
	698	( random_function( iran_part ) - 0.5_wp ) * &
	699	pdx(particles(n)%group)
	700	ENDIF
	701	IF ( pss(particles(n)%group) /= psn(particles(n)%group) ) THEN
	702	particles(n)%y = particles(n)%y + &
	703	( random_function( iran_part ) - 0.5_wp ) * &
	704	pdy(particles(n)%group)
	705	ENDIF
	706	IF ( psb(particles(n)%group) /= pst(particles(n)%group) ) THEN
	707	particles(n)%z = particles(n)%z + &
	708	( random_function( iran_part ) - 0.5_wp ) * &
	709	pdz(particles(n)%group)
	710	ENDIF
	711	ENDDO
[1]	712	!
[1359]	713	!-- Identify particles located outside the model domain
	714	CALL lpm_boundary_conds( 'bottom/top' )
	715	ENDDO
	716	ENDDO
	717	ENDDO
[1]	718	!
[1359]	719	!-- Exchange particles between grid cells and processors
	720	CALL lpm_move_particle
	721	CALL lpm_exchange_horiz
[1]	722
[1359]	723	ENDIF
[1]	724	!
[1359]	725	!-- In case of random_start_position, delete particles identified by
	726	!-- lpm_exchange_horiz and lpm_boundary_conds. Then sort particles into blocks,
	727	!-- which is needed for a fast interpolation of the LES fields on the particle
	728	!-- position.
	729	CALL lpm_pack_all_arrays
[1]	730
	731	!
[1359]	732	!-- Determine maximum number of particles (i.e., all possible particles that
	733	!-- have been allocated) and the current number of particles
	734	DO ip = nxl, nxr
	735	DO jp = nys, nyn
	736	DO kp = nzb+1, nzt
	737	maximum_number_of_particles = maximum_number_of_particles &
	738	+ SIZE(grid_particles(kp,jp,ip)%particles)
	739	number_of_particles = number_of_particles &
	740	+ prt_count(kp,jp,ip)
[1]	741	ENDDO
[1359]	742	ENDDO
	743	ENDDO
[1]	744	!
[1822]	745	!-- Calculate the number of particles of the total domain
[1]	746	#if defined( __parallel )
[1359]	747	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
	748	CALL MPI_ALLREDUCE( number_of_particles, total_number_of_particles, 1, &
	749	MPI_INTEGER, MPI_SUM, comm2d, ierr )
[1]	750	#else
[1359]	751	total_number_of_particles = number_of_particles
[1]	752	#endif
	753
[1359]	754	RETURN
[1]	755
[1359]	756	END SUBROUTINE lpm_create_particle
[336]	757
[1359]	758	END MODULE lpm_init_mod

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