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source: palm/trunk/SOURCE/lpm_init.f90 @ 1754

Last change on this file since 1754 was 1726, checked in by hoffmann, 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	! -----------------
[1726]	21	!
[1692]	22	!
[1321]	23	! Former revisions:
	24	! -----------------
	25	! $Id: lpm_init.f90 1726 2015-11-17 13:03:53Z maronga $
	26	!
[1726]	27	! 1725 2015-11-17 13:01:51Z hoffmann
	28	! Bugfix: Processor-dependent seed for random function is generated before it is
	29	! used.
	30	!
[1692]	31	! 1691 2015-10-26 16:17:44Z maronga
	32	! Renamed prandtl_layer to constant_flux_layer.
	33	!
[1686]	34	! 1685 2015-10-08 07:32:13Z raasch
	35	! bugfix concerning vertical index offset in case of ocean
	36	!
[1683]	37	! 1682 2015-10-07 23:56:08Z knoop
	38	! Code annotations made doxygen readable
	39	!
[1576]	40	! 1575 2015-03-27 09:56:27Z raasch
	41	! initial vertical particle position is allowed to follow the topography
	42	!
[1360]	43	! 1359 2014-04-11 17:15:14Z hoffmann
	44	! New particle structure integrated.
	45	! Kind definition added to all floating point numbers.
	46	! lpm_init changed form a subroutine to a module.
	47	!
[1329]	48	! 1327 2014-03-21 11:00:16Z raasch
	49	! -netcdf_output
	50	!
[1323]	51	! 1322 2014-03-20 16:38:49Z raasch
	52	! REAL functions provided with KIND-attribute
	53	!
[1321]	54	! 1320 2014-03-20 08:40:49Z raasch
[1320]	55	! ONLY-attribute added to USE-statements,
	56	! kind-parameters added to all INTEGER and REAL declaration statements,
	57	! kinds are defined in new module kinds,
	58	! revision history before 2012 removed,
	59	! comment fields (!:) to be used for variable explanations added to
	60	! all variable declaration statements
	61	! bugfix: #if defined( __parallel ) added
[850]	62	!
[1315]	63	! 1314 2014-03-14 18:25:17Z suehring
	64	! Vertical logarithmic interpolation of horizontal particle speed for particles
	65	! between roughness height and first vertical grid level.
	66	!
[1093]	67	! 1092 2013-02-02 11:24:22Z raasch
	68	! unused variables removed
	69	!
[1037]	70	! 1036 2012-10-22 13:43:42Z raasch
	71	! code put under GPL (PALM 3.9)
	72	!
[850]	73	! 849 2012-03-15 10:35:09Z raasch
[849]	74	! routine renamed: init_particles -> lpm_init
	75	! de_dx, de_dy, de_dz are allocated here (instead of automatic arrays in
	76	! advec_particles),
	77	! sort_particles renamed lpm_sort_arrays, user_init_particles renamed lpm_init
[392]	78	!
[829]	79	! 828 2012-02-21 12:00:36Z raasch
	80	! call of init_kernels, particle feature color renamed class
	81	!
[826]	82	! 824 2012-02-17 09:09:57Z raasch
	83	! particle attributes speed_x\|y\|z_sgs renamed rvar1\|2\|3,
	84	! array particles implemented as pointer
	85	!
[668]	86	! 667 2010-12-23 12:06:00Z suehring/gryschka
	87	! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng for allocation
	88	! of arrays.
	89	!
[1]	90	! Revision 1.1 1999/11/25 16:22:38 raasch
	91	! Initial revision
	92	!
	93	!
	94	! Description:
	95	! ------------
[1682]	96	!> This routine initializes a set of particles and their attributes (position,
	97	!> radius, ..) which are used by the Lagrangian particle model (see lpm).
[1]	98	!------------------------------------------------------------------------------!
[1682]	99	MODULE lpm_init_mod
	100
[1]	101
[1320]	102	USE arrays_3d, &
	103	ONLY: de_dx, de_dy, de_dz, zu, zw, z0
	104
	105	USE cloud_parameters, &
	106	ONLY: curvature_solution_effects
	107
	108	USE control_parameters, &
[1691]	109	ONLY: cloud_droplets, constant_flux_layer, current_timestep_number, &
	110	dz, initializing_actions, message_string, netcdf_data_format, &
	111	ocean, simulated_time
[1320]	112
	113	USE dvrp_variables, &
	114	ONLY: particle_color, particle_dvrpsize
	115
	116	USE grid_variables, &
[1359]	117	ONLY: ddx, dx, ddy, dy
[1320]	118
	119	USE indices, &
[1575]	120	ONLY: nx, nxl, nxlg, nxrg, nxr, ny, nyn, nys, nyng, nysg, nz, nzb, &
	121	nzb_w_inner, nzt
[1320]	122
	123	USE kinds
	124
	125	USE lpm_collision_kernels_mod, &
	126	ONLY: init_kernels
	127
	128	USE particle_attributes, &
[1359]	129	ONLY: alloc_factor, bc_par_b, bc_par_lr, bc_par_ns, bc_par_t, &
	130	block_offset, block_offset_def, collision_kernel, &
	131	density_ratio, dvrp_psize, grid_particles, &
	132	initial_weighting_factor, ibc_par_b, ibc_par_lr, ibc_par_ns, &
	133	ibc_par_t, iran_part, log_z_z0, &
	134	max_number_of_particle_groups, maximum_number_of_particles, &
	135	maximum_number_of_tailpoints, maximum_number_of_tails, &
	136	minimum_tailpoint_distance, min_nr_particle, &
	137	mpi_particle_type, new_tail_id, &
[1320]	138	number_of_initial_tails, number_of_particles, &
	139	number_of_particle_groups, number_of_sublayers, &
[1685]	140	number_of_tails, offset_ocean_nzt, offset_ocean_nzt_m1, &
[1359]	141	particles, particle_advection_start, particle_groups, &
	142	particle_groups_type, particles_per_point, &
[1320]	143	particle_tail_coordinates, particle_type, pdx, pdy, pdz, &
[1359]	144	prt_count, psb, psl, psn, psr, pss, pst, &
[1320]	145	radius, random_start_position, read_particles_from_restartfile,&
[1575]	146	seed_follows_topography, skip_particles_for_tail, sort_count, &
[1359]	147	tail_mask, total_number_of_particles, total_number_of_tails, &
[1320]	148	use_particle_tails, use_sgs_for_particles, &
[1359]	149	write_particle_statistics, uniform_particles, zero_particle, &
	150	z0_av_global
[1320]	151
[1]	152	USE pegrid
	153
[1320]	154	USE random_function_mod, &
	155	ONLY: random_function
[1]	156
[1359]	157	IMPLICIT NONE
[1320]	158
[1359]	159	PRIVATE
	160
[1682]	161	INTEGER(iwp), PARAMETER :: PHASE_INIT = 1 !<
	162	INTEGER(iwp), PARAMETER, PUBLIC :: PHASE_RELEASE = 2 !<
[1359]	163
	164	INTERFACE lpm_init
	165	MODULE PROCEDURE lpm_init
	166	END INTERFACE lpm_init
	167
	168	INTERFACE lpm_create_particle
	169	MODULE PROCEDURE lpm_create_particle
	170	END INTERFACE lpm_create_particle
	171
	172	PUBLIC lpm_init, lpm_create_particle
	173
	174	CONTAINS
	175
[1682]	176	!------------------------------------------------------------------------------!
	177	! Description:
	178	! ------------
	179	!> @todo Missing subroutine description.
	180	!------------------------------------------------------------------------------!
[1359]	181	SUBROUTINE lpm_init
	182
	183	USE lpm_collision_kernels_mod, &
	184	ONLY: init_kernels
	185
[1]	186	IMPLICIT NONE
	187
[1682]	188	INTEGER(iwp) :: i !<
	189	INTEGER(iwp) :: ip !<
	190	INTEGER(iwp) :: j !<
	191	INTEGER(iwp) :: jp !<
	192	INTEGER(iwp) :: k !<
	193	INTEGER(iwp) :: kp !<
	194	INTEGER(iwp) :: n !<
	195	INTEGER(iwp) :: nn !<
[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
[1682]	202	LOGICAL :: uniform_particles_l !<
[1]	203
[1682]	204	REAL(wp) :: height_int !<
	205	REAL(wp) :: height_p !<
	206	REAL(wp) :: z_p !<
	207	REAL(wp) :: z0_av_local !<
[1]	208
	209	#if defined( __parallel )
	210	!
	211	!-- Define MPI derived datatype for FORTRAN datatype particle_type (see module
[82]	212	!-- particle_attributes). Integer length is 4 byte, Real is 8 byte
[1359]	213	#if defined( __twocachelines )
	214	blocklengths(1) = 7; blocklengths(2) = 18; blocklengths(3) = 1
	215	displacements(1) = 0; displacements(2) = 64; displacements(3) = 128
[82]	216
[1359]	217	types(1) = MPI_REAL ! 64 bit words
	218	types(2) = MPI_INTEGER ! 32 Bit words
	219	types(3) = MPI_UB
	220	#else
	221	blocklengths(1) = 19; blocklengths(2) = 6; blocklengths(3) = 1
	222	displacements(1) = 0; displacements(2) = 152; displacements(3) = 176
	223
[1]	224	types(1) = MPI_REAL
	225	types(2) = MPI_INTEGER
	226	types(3) = MPI_UB
[1359]	227	#endif
[1]	228	CALL MPI_TYPE_STRUCT( 3, blocklengths, displacements, types, &
	229	mpi_particle_type, ierr )
	230	CALL MPI_TYPE_COMMIT( mpi_particle_type, ierr )
	231	#endif
	232
	233	!
[150]	234	!-- In case of oceans runs, the vertical index calculations need an offset,
	235	!-- because otherwise the k indices will become negative
	236	IF ( ocean ) THEN
	237	offset_ocean_nzt = nzt
	238	offset_ocean_nzt_m1 = nzt - 1
	239	ENDIF
	240
[1359]	241	!
	242	!-- Define block offsets for dividing a gridcell in 8 sub cells
[150]	243
[1359]	244	block_offset(0) = block_offset_def (-1,-1,-1)
	245	block_offset(1) = block_offset_def (-1,-1, 0)
	246	block_offset(2) = block_offset_def (-1, 0,-1)
	247	block_offset(3) = block_offset_def (-1, 0, 0)
	248	block_offset(4) = block_offset_def ( 0,-1,-1)
	249	block_offset(5) = block_offset_def ( 0,-1, 0)
	250	block_offset(6) = block_offset_def ( 0, 0,-1)
	251	block_offset(7) = block_offset_def ( 0, 0, 0)
[150]	252	!
[1]	253	!-- Check the number of particle groups.
	254	IF ( number_of_particle_groups > max_number_of_particle_groups ) THEN
[274]	255	WRITE( message_string, * ) 'max_number_of_particle_groups =', &
	256	max_number_of_particle_groups , &
[254]	257	'&number_of_particle_groups reset to ', &
	258	max_number_of_particle_groups
[849]	259	CALL message( 'lpm_init', 'PA0213', 0, 1, 0, 6, 0 )
[1]	260	number_of_particle_groups = max_number_of_particle_groups
	261	ENDIF
	262
	263	!
	264	!-- Set default start positions, if necessary
[1359]	265	IF ( psl(1) == 9999999.9_wp ) psl(1) = -0.5_wp * dx
	266	IF ( psr(1) == 9999999.9_wp ) psr(1) = ( nx + 0.5_wp ) * dx
	267	IF ( pss(1) == 9999999.9_wp ) pss(1) = -0.5_wp * dy
	268	IF ( psn(1) == 9999999.9_wp ) psn(1) = ( ny + 0.5_wp ) * dy
	269	IF ( psb(1) == 9999999.9_wp ) psb(1) = zu(nz/2)
	270	IF ( pst(1) == 9999999.9_wp ) pst(1) = psb(1)
[1]	271
[1359]	272	IF ( pdx(1) == 9999999.9_wp .OR. pdx(1) == 0.0_wp ) pdx(1) = dx
	273	IF ( pdy(1) == 9999999.9_wp .OR. pdy(1) == 0.0_wp ) pdy(1) = dy
	274	IF ( pdz(1) == 9999999.9_wp .OR. pdz(1) == 0.0_wp ) pdz(1) = zu(2) - zu(1)
[1]	275
	276	DO j = 2, number_of_particle_groups
[1359]	277	IF ( psl(j) == 9999999.9_wp ) psl(j) = psl(j-1)
	278	IF ( psr(j) == 9999999.9_wp ) psr(j) = psr(j-1)
	279	IF ( pss(j) == 9999999.9_wp ) pss(j) = pss(j-1)
	280	IF ( psn(j) == 9999999.9_wp ) psn(j) = psn(j-1)
	281	IF ( psb(j) == 9999999.9_wp ) psb(j) = psb(j-1)
	282	IF ( pst(j) == 9999999.9_wp ) pst(j) = pst(j-1)
	283	IF ( pdx(j) == 9999999.9_wp .OR. pdx(j) == 0.0_wp ) pdx(j) = pdx(j-1)
	284	IF ( pdy(j) == 9999999.9_wp .OR. pdy(j) == 0.0_wp ) pdy(j) = pdy(j-1)
	285	IF ( pdz(j) == 9999999.9_wp .OR. pdz(j) == 0.0_wp ) pdz(j) = pdz(j-1)
[1]	286	ENDDO
	287
	288	!
[849]	289	!-- Allocate arrays required for calculating particle SGS velocities
	290	IF ( use_sgs_for_particles ) THEN
	291	ALLOCATE( de_dx(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
	292	de_dy(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
	293	de_dz(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	294	ENDIF
	295
	296	!
[1314]	297	!-- Allocate array required for logarithmic vertical interpolation of
	298	!-- horizontal particle velocities between the surface and the first vertical
	299	!-- grid level. In order to avoid repeated CPU cost-intensive CALLS of
	300	!-- intrinsic FORTRAN procedure LOG(z/z0), LOG(z/z0) is precalculated for
	301	!-- several heights. Splitting into 20 sublayers turned out to be sufficient.
	302	!-- To obtain exact height levels of particles, linear interpolation is applied
	303	!-- (see lpm_advec.f90).
[1691]	304	IF ( constant_flux_layer ) THEN
[1314]	305
	306	ALLOCATE ( log_z_z0(0:number_of_sublayers) )
	307	z_p = zu(nzb+1) - zw(nzb)
	308
	309	!
	310	!-- Calculate horizontal mean value of z0 used for logartihmic
	311	!-- interpolation. Note: this is not exact for heterogeneous z0.
	312	!-- However, sensitivity studies showed that the effect is
	313	!-- negligible.
	314	z0_av_local = SUM( z0(nys:nyn,nxl:nxr) )
[1359]	315	z0_av_global = 0.0_wp
[1314]	316
[1320]	317	#if defined( __parallel )
[1314]	318	CALL MPI_ALLREDUCE(z0_av_local, z0_av_global, 1, MPI_REAL, MPI_SUM, &
	319	comm2d, ierr )
[1320]	320	#else
	321	z0_av_global = z0_av_local
	322	#endif
[1314]	323
	324	z0_av_global = z0_av_global / ( ( ny + 1 ) * ( nx + 1 ) )
	325	!
	326	!-- Horizontal wind speed is zero below and at z0
[1359]	327	log_z_z0(0) = 0.0_wp
[1314]	328	!
	329	!-- Calculate vertical depth of the sublayers
[1322]	330	height_int = ( z_p - z0_av_global ) / REAL( number_of_sublayers, KIND=wp )
[1314]	331	!
	332	!-- Precalculate LOG(z/z0)
[1359]	333	height_p = 0.0_wp
[1314]	334	DO k = 1, number_of_sublayers
	335
	336	height_p = height_p + height_int
	337	log_z_z0(k) = LOG( height_p / z0_av_global )
	338
	339	ENDDO
	340
	341
	342	ENDIF
	343
	344	!
[1359]	345	!-- Check boundary condition and set internal variables
	346	SELECT CASE ( bc_par_b )
	347
	348	CASE ( 'absorb' )
	349	ibc_par_b = 1
	350
	351	CASE ( 'reflect' )
	352	ibc_par_b = 2
	353
	354	CASE DEFAULT
	355	WRITE( message_string, * ) 'unknown boundary condition ', &
	356	'bc_par_b = "', TRIM( bc_par_b ), '"'
	357	CALL message( 'lpm_init', 'PA0217', 1, 2, 0, 6, 0 )
	358
	359	END SELECT
	360	SELECT CASE ( bc_par_t )
	361
	362	CASE ( 'absorb' )
	363	ibc_par_t = 1
	364
	365	CASE ( 'reflect' )
	366	ibc_par_t = 2
	367
	368	CASE DEFAULT
	369	WRITE( message_string, * ) 'unknown boundary condition ', &
	370	'bc_par_t = "', TRIM( bc_par_t ), '"'
	371	CALL message( 'lpm_init', 'PA0218', 1, 2, 0, 6, 0 )
	372
	373	END SELECT
	374	SELECT CASE ( bc_par_lr )
	375
	376	CASE ( 'cyclic' )
	377	ibc_par_lr = 0
	378
	379	CASE ( 'absorb' )
	380	ibc_par_lr = 1
	381
	382	CASE ( 'reflect' )
	383	ibc_par_lr = 2
	384
	385	CASE DEFAULT
	386	WRITE( message_string, * ) 'unknown boundary condition ', &
	387	'bc_par_lr = "', TRIM( bc_par_lr ), '"'
	388	CALL message( 'lpm_init', 'PA0219', 1, 2, 0, 6, 0 )
	389
	390	END SELECT
	391	SELECT CASE ( bc_par_ns )
	392
	393	CASE ( 'cyclic' )
	394	ibc_par_ns = 0
	395
	396	CASE ( 'absorb' )
	397	ibc_par_ns = 1
	398
	399	CASE ( 'reflect' )
	400	ibc_par_ns = 2
	401
	402	CASE DEFAULT
	403	WRITE( message_string, * ) 'unknown boundary condition ', &
	404	'bc_par_ns = "', TRIM( bc_par_ns ), '"'
	405	CALL message( 'lpm_init', 'PA0220', 1, 2, 0, 6, 0 )
	406
	407	END SELECT
	408
	409	!
[828]	410	!-- Initialize collision kernels
	411	IF ( collision_kernel /= 'none' ) CALL init_kernels
	412
	413	!
[1]	414	!-- For the first model run of a possible job chain initialize the
[849]	415	!-- particles, otherwise read the particle data from restart file.
[1]	416	IF ( TRIM( initializing_actions ) == 'read_restart_data' &
	417	.AND. read_particles_from_restartfile ) THEN
	418
[849]	419	CALL lpm_read_restart_file
[1]	420
	421	ELSE
	422
	423	!
	424	!-- Allocate particle arrays and set attributes of the initial set of
	425	!-- particles, which can be also periodically released at later times.
	426	!-- Also allocate array for particle tail coordinates, if needed.
[1359]	427	ALLOCATE( prt_count(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
	428	grid_particles(nzb+1:nzt,nys:nyn,nxl:nxr) )
[1]	429
[1359]	430	maximum_number_of_particles = 0
	431	number_of_particles = 0
[792]	432
	433	sort_count = 0
[1359]	434	prt_count = 0
[792]	435
[1]	436	!
	437	!-- Initialize all particles with dummy values (otherwise errors may
	438	!-- occur within restart runs). The reason for this is still not clear
	439	!-- and may be presumably caused by errors in the respective user-interface.
[1359]	440	#if defined( __twocachelines )
	441	zero_particle = particle_type( 0.0_wp, 0.0_sp, 0.0_sp, 0.0_sp, 0.0_sp, &
	442	0.0_sp, 0.0_sp, 0.0_wp, 0.0_wp, 0.0_wp, &
	443	0, .FALSE., 0.0_wp, 0.0_wp, 0.0_wp, &
	444	0.0_sp, 0.0_sp, 0.0_sp, 0.0_sp, 0.0_sp, &
	445	0.0_sp, 0, 0, 0, -1)
	446	#else
	447	zero_particle = particle_type( 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	448	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	449	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	450	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0, 0, 0, &
	451	0, .FALSE., -1)
	452	#endif
	453	particle_groups = particle_groups_type( 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp )
[1]	454
	455	!
	456	!-- Set the default particle size used for dvrp plots
[1359]	457	IF ( dvrp_psize == 9999999.9_wp ) dvrp_psize = 0.2_wp * dx
[1]	458
	459	!
	460	!-- Set values for the density ratio and radius for all particle
	461	!-- groups, if necessary
[1359]	462	IF ( density_ratio(1) == 9999999.9_wp ) density_ratio(1) = 0.0_wp
	463	IF ( radius(1) == 9999999.9_wp ) radius(1) = 0.0_wp
[1]	464	DO i = 2, number_of_particle_groups
[1359]	465	IF ( density_ratio(i) == 9999999.9_wp ) THEN
[1]	466	density_ratio(i) = density_ratio(i-1)
	467	ENDIF
[1359]	468	IF ( radius(i) == 9999999.9_wp ) radius(i) = radius(i-1)
[1]	469	ENDDO
	470
	471	DO i = 1, number_of_particle_groups
[1359]	472	IF ( density_ratio(i) /= 0.0_wp .AND. radius(i) == 0 ) THEN
[254]	473	WRITE( message_string, * ) 'particle group #', i, 'has a', &
	474	'density ratio /= 0 but radius = 0'
[849]	475	CALL message( 'lpm_init', 'PA0215', 1, 2, 0, 6, 0 )
[1]	476	ENDIF
	477	particle_groups(i)%density_ratio = density_ratio(i)
	478	particle_groups(i)%radius = radius(i)
	479	ENDDO
	480
	481	!
[1359]	482	!-- Set a seed value for the random number generator to be exclusively
	483	!-- used for the particle code. The generated random numbers should be
	484	!-- different on the different PEs.
	485	iran_part = iran_part + myid
	486
[1725]	487	CALL lpm_create_particle (PHASE_INIT)
	488
[1359]	489	!
	490	!-- User modification of initial particles
	491	CALL user_lpm_init
	492
	493	!
	494	!-- Open file for statistical informations about particle conditions
	495	IF ( write_particle_statistics ) THEN
	496	CALL check_open( 80 )
	497	WRITE ( 80, 8000 ) current_timestep_number, simulated_time, &
	498	number_of_particles, &
	499	maximum_number_of_particles
	500	CALL close_file( 80 )
	501	ENDIF
	502
	503	!
	504	!-- Check if particles are really uniform in color and radius (dvrp_size)
	505	!-- (uniform_particles is preset TRUE)
	506	IF ( uniform_particles ) THEN
	507	DO ip = nxl, nxr
	508	DO jp = nys, nyn
	509	DO kp = nzb+1, nzt
	510
	511	n = prt_count(kp,jp,ip)
	512	IF ( MINVAL( grid_particles(kp,jp,ip)%particles(1:n)%dvrp_psize ) == &
	513	MAXVAL( grid_particles(kp,jp,ip)%particles(1:n)%dvrp_psize ) .AND. &
	514	MINVAL( grid_particles(kp,jp,ip)%particles(1:n)%class ) == &
	515	MAXVAL( grid_particles(kp,jp,ip)%particles(1:n)%class ) ) THEN
	516	uniform_particles_l = .TRUE.
	517	ELSE
	518	uniform_particles_l = .FALSE.
	519	ENDIF
	520
	521	ENDDO
	522	ENDDO
	523	ENDDO
	524
	525	#if defined( __parallel )
	526	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
	527	CALL MPI_ALLREDUCE( uniform_particles_l, uniform_particles, 1, &
	528	MPI_LOGICAL, MPI_LAND, comm2d, ierr )
	529	#else
	530	uniform_particles = uniform_particles_l
	531	#endif
	532
	533	ENDIF
	534
	535	!
	536	!-- Particles will probably become none-uniform, if their size and color
	537	!-- will be determined by flow variables
	538	IF ( particle_color /= 'none' .OR. particle_dvrpsize /= 'none' ) THEN
	539	uniform_particles = .FALSE.
	540	ENDIF
	541
	542	! !kk Not implemented aft individual particle array fort every gridcell
	543	! !
	544	! !-- Set the beginning of the particle tails and their age
	545	! IF ( use_particle_tails ) THEN
	546	! !
	547	! !-- Choose the maximum number of tails with respect to the maximum number
	548	! !-- of particles and skip_particles_for_tail
	549	! maximum_number_of_tails = maximum_number_of_particles / &
	550	! skip_particles_for_tail
	551	!
	552	! !
	553	! !-- Create a minimum number of tails in case that there is no tail
	554	! !-- initially (otherwise, index errors will occur when adressing the
	555	! !-- arrays below)
	556	! IF ( maximum_number_of_tails == 0 ) maximum_number_of_tails = 10
	557	!
	558	! ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, &
	559	! maximum_number_of_tails), &
	560	! new_tail_id(maximum_number_of_tails), &
	561	! tail_mask(maximum_number_of_tails) )
	562	!
	563	! particle_tail_coordinates = 0.0_wp
	564	! minimum_tailpoint_distance = minimum_tailpoint_distance**2
	565	! number_of_initial_tails = number_of_tails
	566	!
	567	! nn = 0
	568	! DO n = 1, number_of_particles
	569	! !
	570	! !-- Only for those particles marked above with a provisional tail_id
	571	! !-- tails will be created. Particles now get their final tail_id.
	572	! IF ( particles(n)%tail_id /= 0 ) THEN
	573	!
	574	! nn = nn + 1
	575	! particles(n)%tail_id = nn
	576	!
	577	! particle_tail_coordinates(1,1,nn) = particles(n)%x
	578	! particle_tail_coordinates(1,2,nn) = particles(n)%y
	579	! particle_tail_coordinates(1,3,nn) = particles(n)%z
	580	! particle_tail_coordinates(1,4,nn) = particles(n)%class
	581	! particles(n)%tailpoints = 1
	582	! IF ( minimum_tailpoint_distance /= 0.0_wp ) THEN
	583	! particle_tail_coordinates(2,1,nn) = particles(n)%x
	584	! particle_tail_coordinates(2,2,nn) = particles(n)%y
	585	! particle_tail_coordinates(2,3,nn) = particles(n)%z
	586	! particle_tail_coordinates(2,4,nn) = particles(n)%class
	587	! particle_tail_coordinates(1:2,5,nn) = 0.0_wp
	588	! particles(n)%tailpoints = 2
	589	! ENDIF
	590	!
	591	! ENDIF
	592	! ENDDO
	593	! ENDIF
	594	!
	595	! !
	596	! !-- Plot initial positions of particles (only if particle advection is
	597	! !-- switched on from the beginning of the simulation (t=0))
	598	! IF ( particle_advection_start == 0.0_wp ) CALL data_output_dvrp
	599
	600	ENDIF
	601
	602	!
	603	!-- To avoid programm abort, assign particles array to the local version of
	604	!-- first grid cell
	605	number_of_particles = prt_count(nzb+1,nys,nxl)
	606	particles => grid_particles(nzb+1,nys,nxl)%particles(1:number_of_particles)
	607
	608	!
	609	!-- Formats
	610	8000 FORMAT (I6,1X,F7.2,4X,I10,71X,I10)
	611
	612	END SUBROUTINE lpm_init
	613
[1682]	614	!------------------------------------------------------------------------------!
	615	! Description:
	616	! ------------
	617	!> @todo Missing subroutine description.
	618	!------------------------------------------------------------------------------!
[1359]	619	SUBROUTINE lpm_create_particle (phase)
	620
	621	USE lpm_exchange_horiz_mod, &
	622	ONLY: lpm_exchange_horiz, lpm_move_particle, realloc_particles_array
	623
	624	USE lpm_pack_arrays_mod, &
	625	ONLY: lpm_pack_all_arrays
	626
	627	IMPLICIT NONE
	628
[1682]	629	INTEGER(iwp) :: alloc_size !<
	630	INTEGER(iwp) :: i !<
	631	INTEGER(iwp) :: ip !<
	632	INTEGER(iwp) :: j !<
	633	INTEGER(iwp) :: jp !<
	634	INTEGER(iwp) :: kp !<
	635	INTEGER(iwp) :: loop_stride !<
	636	INTEGER(iwp) :: n !<
	637	INTEGER(iwp) :: new_size !<
	638	INTEGER(iwp) :: nn !<
[1359]	639
[1682]	640	INTEGER(iwp), INTENT(IN) :: phase !<
[1359]	641
[1682]	642	INTEGER(iwp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: local_count !<
	643	INTEGER(iwp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: local_start !<
[1359]	644
[1682]	645	LOGICAL :: first_stride !<
[1359]	646
[1682]	647	REAL(wp) :: pos_x !<
	648	REAL(wp) :: pos_y !<
	649	REAL(wp) :: pos_z !<
[1359]	650
[1682]	651	TYPE(particle_type),TARGET :: tmp_particle !<
[1359]	652
	653	!
	654	!-- Calculate particle positions and store particle attributes, if
	655	!-- particle is situated on this PE
	656	DO loop_stride = 1, 2
	657	first_stride = (loop_stride == 1)
	658	IF ( first_stride ) THEN
	659	local_count = 0 ! count number of particles
	660	ELSE
	661	local_count = prt_count ! Start address of new particles
	662	ENDIF
	663
[1]	664	n = 0
	665	DO i = 1, number_of_particle_groups
	666
	667	pos_z = psb(i)
	668
	669	DO WHILE ( pos_z <= pst(i) )
	670
	671	pos_y = pss(i)
	672
	673	DO WHILE ( pos_y <= psn(i) )
	674
[1359]	675	IF ( pos_y >= ( nys - 0.5_wp ) * dy .AND. &
	676	pos_y < ( nyn + 0.5_wp ) * dy ) THEN
[1]	677
	678	pos_x = psl(i)
	679
[1575]	680	xloop: DO WHILE ( pos_x <= psr(i) )
[1]	681
[1359]	682	IF ( pos_x >= ( nxl - 0.5_wp ) * dx .AND. &
	683	pos_x < ( nxr + 0.5_wp ) * dx ) THEN
[1]	684
	685	DO j = 1, particles_per_point
	686
	687	n = n + 1
[1359]	688	#if defined( __twocachelines )
	689	tmp_particle%x = pos_x
	690	tmp_particle%y = pos_y
	691	tmp_particle%z = pos_z
	692	tmp_particle%age = 0.0_sp
	693	tmp_particle%age_m = 0.0_sp
	694	tmp_particle%dt_sum = 0.0_wp
	695	tmp_particle%dvrp_psize = dvrp_psize
	696	tmp_particle%e_m = 0.0_sp
	697	IF ( curvature_solution_effects ) THEN
	698	!
	699	!-- Initial values (internal timesteps, derivative)
	700	!-- for Rosenbrock method
	701	tmp_particle%rvar1 = 1.0E-12_wp
	702	tmp_particle%rvar2 = 1.0E-3_wp
	703	tmp_particle%rvar3 = -9999999.9_wp
	704	ELSE
	705	!
	706	!-- Initial values for SGS velocities
	707	tmp_particle%rvar1 = 0.0_wp
	708	tmp_particle%rvar2 = 0.0_wp
	709	tmp_particle%rvar3 = 0.0_wp
[1]	710	ENDIF
[1359]	711	tmp_particle%speed_x = 0.0_sp
	712	tmp_particle%speed_y = 0.0_sp
	713	tmp_particle%speed_z = 0.0_sp
	714	tmp_particle%origin_x = pos_x
	715	tmp_particle%origin_y = pos_y
	716	tmp_particle%origin_z = pos_z
	717	tmp_particle%radius = particle_groups(i)%radius
	718	tmp_particle%weight_factor = initial_weighting_factor
	719	tmp_particle%class = 1
	720	tmp_particle%group = i
	721	tmp_particle%tailpoints = 0
	722	tmp_particle%particle_mask = .TRUE.
	723	#else
	724	tmp_particle%x = pos_x
	725	tmp_particle%y = pos_y
	726	tmp_particle%z = pos_z
	727	tmp_particle%age = 0.0_wp
	728	tmp_particle%age_m = 0.0_wp
	729	tmp_particle%dt_sum = 0.0_wp
	730	tmp_particle%dvrp_psize = dvrp_psize
	731	tmp_particle%e_m = 0.0_wp
[824]	732	IF ( curvature_solution_effects ) THEN
	733	!
	734	!-- Initial values (internal timesteps, derivative)
	735	!-- for Rosenbrock method
[1359]	736	tmp_particle%rvar1 = 1.0E-12_wp
	737	tmp_particle%rvar2 = 1.0E-3_wp
	738	tmp_particle%rvar3 = -9999999.9_wp
[824]	739	ELSE
	740	!
	741	!-- Initial values for SGS velocities
[1359]	742	tmp_particle%rvar1 = 0.0_wp
	743	tmp_particle%rvar2 = 0.0_wp
	744	tmp_particle%rvar3 = 0.0_wp
[824]	745	ENDIF
[1359]	746	tmp_particle%speed_x = 0.0_wp
	747	tmp_particle%speed_y = 0.0_wp
	748	tmp_particle%speed_z = 0.0_wp
	749	tmp_particle%origin_x = pos_x
	750	tmp_particle%origin_y = pos_y
	751	tmp_particle%origin_z = pos_z
	752	tmp_particle%radius = particle_groups(i)%radius
	753	tmp_particle%weight_factor = initial_weighting_factor
	754	tmp_particle%class = 1
	755	tmp_particle%group = i
	756	tmp_particle%tailpoints = 0
	757	tmp_particle%particle_mask = .TRUE.
	758	#endif
[1]	759	IF ( use_particle_tails .AND. &
	760	MOD( n, skip_particles_for_tail ) == 0 ) THEN
	761	number_of_tails = number_of_tails + 1
	762	!
	763	!-- This is a temporary provisional setting (see
	764	!-- further below!)
[1359]	765	tmp_particle%tail_id = number_of_tails
[1]	766	ELSE
[1359]	767	tmp_particle%tail_id = 0
[1]	768	ENDIF
[1575]	769	!
	770	!-- Determine the grid indices of the particle position
[1359]	771	ip = ( tmp_particle%x + 0.5_wp * dx ) * ddx
	772	jp = ( tmp_particle%y + 0.5_wp * dy ) * ddy
[1685]	773	kp = tmp_particle%z / dz + 1 + offset_ocean_nzt
[1]	774
[1575]	775	IF ( seed_follows_topography ) THEN
	776	!
	777	!-- Particle height is given relative to topography
	778	kp = kp + nzb_w_inner(jp,ip)
	779	tmp_particle%z = tmp_particle%z + zw(kp)
	780	IF ( kp > nzt ) THEN
	781	pos_x = pos_x + pdx(i)
	782	CYCLE xloop
	783	ENDIF
	784	ENDIF
	785
[1359]	786	local_count(kp,jp,ip) = local_count(kp,jp,ip) + 1
	787	IF ( .NOT. first_stride ) THEN
	788	IF ( ip < nxl .OR. jp < nys .OR. kp < nzb+1 ) THEN
	789	write(6,*) 'xl ',ip,jp,kp,nxl,nys,nzb+1
	790	ENDIF
	791	IF ( ip > nxr .OR. jp > nyn .OR. kp > nzt ) THEN
	792	write(6,*) 'xu ',ip,jp,kp,nxr,nyn,nzt
	793	ENDIF
	794	grid_particles(kp,jp,ip)%particles(local_count(kp,jp,ip)) = tmp_particle
	795	ENDIF
[1]	796	ENDDO
	797
	798	ENDIF
	799
	800	pos_x = pos_x + pdx(i)
	801
[1575]	802	ENDDO xloop
[1]	803
	804	ENDIF
	805
	806	pos_y = pos_y + pdy(i)
	807
	808	ENDDO
	809
	810	pos_z = pos_z + pdz(i)
	811
	812	ENDDO
	813
	814	ENDDO
	815
[1359]	816	IF ( first_stride ) THEN
	817	DO ip = nxl, nxr
	818	DO jp = nys, nyn
	819	DO kp = nzb+1, nzt
	820	IF ( phase == PHASE_INIT ) THEN
	821	IF ( local_count(kp,jp,ip) > 0 ) THEN
	822	alloc_size = MAX( INT( local_count(kp,jp,ip) * &
	823	( 1.0_wp + alloc_factor / 100.0_wp ) ), &
	824	min_nr_particle )
	825	ELSE
	826	alloc_size = min_nr_particle
	827	ENDIF
	828	ALLOCATE(grid_particles(kp,jp,ip)%particles(1:alloc_size))
	829	DO n = 1, alloc_size
	830	grid_particles(kp,jp,ip)%particles(n) = zero_particle
	831	ENDDO
	832	ELSEIF ( phase == PHASE_RELEASE ) THEN
	833	IF ( local_count(kp,jp,ip) > 0 ) THEN
	834	new_size = local_count(kp,jp,ip) + prt_count(kp,jp,ip)
	835	alloc_size = MAX( INT( new_size * ( 1.0_wp + &
	836	alloc_factor / 100.0_wp ) ), min_nr_particle )
	837	IF( alloc_size > SIZE( grid_particles(kp,jp,ip)%particles) ) THEN
	838	CALL realloc_particles_array(ip,jp,kp,alloc_size)
	839	ENDIF
	840	ENDIF
	841	ENDIF
	842	ENDDO
	843	ENDDO
	844	ENDDO
	845	ENDIF
	846	ENDDO
[1]	847
[1359]	848	local_start = prt_count+1
	849	prt_count = local_count
[1]	850	!
[1359]	851	!-- Add random fluctuation to particle positions
	852	IF ( random_start_position ) THEN
	853	DO ip = nxl, nxr
	854	DO jp = nys, nyn
	855	DO kp = nzb+1, nzt
	856	number_of_particles = prt_count(kp,jp,ip)
	857	IF ( number_of_particles <= 0 ) CYCLE
	858	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
[1]	859
[1359]	860	DO n = local_start(kp,jp,ip), number_of_particles !Move only new particles
	861	IF ( psl(particles(n)%group) /= psr(particles(n)%group) ) THEN
	862	particles(n)%x = particles(n)%x + &
	863	( random_function( iran_part ) - 0.5_wp ) * &
	864	pdx(particles(n)%group)
	865	ENDIF
	866	IF ( pss(particles(n)%group) /= psn(particles(n)%group) ) THEN
	867	particles(n)%y = particles(n)%y + &
	868	( random_function( iran_part ) - 0.5_wp ) * &
	869	pdy(particles(n)%group)
	870	ENDIF
	871	IF ( psb(particles(n)%group) /= pst(particles(n)%group) ) THEN
	872	particles(n)%z = particles(n)%z + &
	873	( random_function( iran_part ) - 0.5_wp ) * &
	874	pdz(particles(n)%group)
	875	ENDIF
	876	ENDDO
[1]	877	!
[1359]	878	!-- Identify particles located outside the model domain
	879	CALL lpm_boundary_conds( 'bottom/top' )
	880	ENDDO
	881	ENDDO
	882	ENDDO
[1]	883	!
[1359]	884	!-- Exchange particles between grid cells and processors
	885	CALL lpm_move_particle
	886	CALL lpm_exchange_horiz
[1]	887
[1359]	888	ENDIF
[1]	889	!
[1359]	890	!-- In case of random_start_position, delete particles identified by
	891	!-- lpm_exchange_horiz and lpm_boundary_conds. Then sort particles into blocks,
	892	!-- which is needed for a fast interpolation of the LES fields on the particle
	893	!-- position.
	894	CALL lpm_pack_all_arrays
[1]	895
	896	!
[1359]	897	!-- Determine maximum number of particles (i.e., all possible particles that
	898	!-- have been allocated) and the current number of particles
	899	DO ip = nxl, nxr
	900	DO jp = nys, nyn
	901	DO kp = nzb+1, nzt
	902	maximum_number_of_particles = maximum_number_of_particles &
	903	+ SIZE(grid_particles(kp,jp,ip)%particles)
	904	number_of_particles = number_of_particles &
	905	+ prt_count(kp,jp,ip)
[1]	906	ENDDO
[1359]	907	ENDDO
	908	ENDDO
[1]	909	!
[1359]	910	!-- Calculate the number of particles and tails of the total domain
[1]	911	#if defined( __parallel )
[1359]	912	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
	913	CALL MPI_ALLREDUCE( number_of_particles, total_number_of_particles, 1, &
	914	MPI_INTEGER, MPI_SUM, comm2d, ierr )
	915	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
	916	CALL MPI_ALLREDUCE( number_of_tails, total_number_of_tails, 1, &
	917	MPI_INTEGER, MPI_SUM, comm2d, ierr )
[1]	918	#else
[1359]	919	total_number_of_particles = number_of_particles
	920	total_number_of_tails = number_of_tails
[1]	921	#endif
	922
[1359]	923	RETURN
[1]	924
[1359]	925	END SUBROUTINE lpm_create_particle
[336]	926
[1359]	927	END MODULE lpm_init_mod

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