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source: palm/trunk/SOURCE/lpm_exchange_horiz.f90 @ 2290

Last change on this file since 2290 was 2245, checked in by schwenkel, 7 years ago
Bugfix in Add_particles_to_gridcell
Property svn:keywords set to `Id`
File size: 47.9 KB

Rev	Line
[1873]	1	!> @file lpm_exchange_horiz.f90
[2000]	2	!------------------------------------------------------------------------------!
[1036]	3	! This file is part of PALM.
	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.
[1036]	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	!
[2101]	17	! Copyright 1997-2017 Leibniz Universitaet Hannover
[2000]	18	!------------------------------------------------------------------------------!
[1036]	19	!
[849]	20	! Current revisions:
	21	! ------------------
[1930]	22	!
[2245]	23	!
[1930]	24	! Former revisions:
	25	! -----------------
	26	! $Id: lpm_exchange_horiz.f90 2245 2017-06-02 14:37:10Z raasch $
[2245]	27	! Bugfix in Add_particles_to_gridcell:
	28	! Apply boundary conditions also in y-direction
	29	!
	30	! 2151 2017-02-15 10:42:16Z schwenkel
	31	! Bugfix in lpm_move_particle that prevents
	32	! false production of additional particles
[1930]	33	!
[2001]	34	! 2000 2016-08-20 18:09:15Z knoop
	35	! Forced header and separation lines into 80 columns
	36	!
[1937]	37	! 1936 2016-06-13 13:37:44Z suehring
	38	! Deallocation of unused memory
	39	!
[1930]	40	! 1929 2016-06-09 16:25:25Z suehring
[1929]	41	! Bugfixes:
	42	! - reallocation of new particles
	43	! ( did not work for small number of min_nr_particle )
	44	! - dynamical reallocation of north-south exchange arrays ( particles got lost )
	45	! - north-south exchange ( nr_move_north, nr_move_south were overwritten by zero )
	46	! - horizontal particle boundary conditions in serial mode
	47	!
	48	! Remove unused variables
	49	! Descriptions in variable declaration blocks added
[1321]	50	!
[1874]	51	! 1873 2016-04-18 14:50:06Z maronga
	52	! Module renamed (removed _mod)
	53	!
	54	!
[1851]	55	! 1850 2016-04-08 13:29:27Z maronga
	56	! Module renamed
	57	!
	58	!
[1823]	59	! 1822 2016-04-07 07:49:42Z hoffmann
	60	! Tails removed. Unused variables removed.
	61	!
[1784]	62	! 1783 2016-03-06 18:36:17Z raasch
	63	! new netcdf-module included
	64	!
[1692]	65	! 1691 2015-10-26 16:17:44Z maronga
	66	! Formatting corrections.
	67	!
[1686]	68	! 1685 2015-10-08 07:32:13Z raasch
	69	! bugfix concerning vertical index offset in case of ocean
	70	!
[1683]	71	! 1682 2015-10-07 23:56:08Z knoop
	72	! Code annotations made doxygen readable
	73	!
[1360]	74	! 1359 2014-04-11 17:15:14Z hoffmann
	75	! New particle structure integrated.
	76	! Kind definition added to all floating point numbers.
	77	!
[1329]	78	! 1327 2014-03-21 11:00:16Z raasch
	79	! -netcdf output queries
	80	!
[1321]	81	! 1320 2014-03-20 08:40:49Z raasch
[1320]	82	! ONLY-attribute added to USE-statements,
	83	! kind-parameters added to all INTEGER and REAL declaration statements,
	84	! kinds are defined in new module kinds,
	85	! comment fields (!:) to be used for variable explanations added to
	86	! all variable declaration statements
[849]	87	!
[1319]	88	! 1318 2014-03-17 13:35:16Z raasch
	89	! module interfaces removed
	90	!
[1037]	91	! 1036 2012-10-22 13:43:42Z raasch
	92	! code put under GPL (PALM 3.9)
	93	!
[852]	94	! 851 2012-03-15 14:32:58Z raasch
	95	! Bugfix: resetting of particle_mask and tail mask moved from end of this
	96	! routine to lpm
	97	!
[850]	98	! 849 2012-03-15 10:35:09Z raasch
	99	! initial revision (former part of advec_particles)
[849]	100	!
[850]	101	!
[849]	102	! Description:
	103	! ------------
[1822]	104	! Exchange of particles between the subdomains.
[849]	105	!------------------------------------------------------------------------------!
[1682]	106	MODULE lpm_exchange_horiz_mod
	107
[849]	108
[1320]	109	USE control_parameters, &
[1783]	110	ONLY: dz, message_string, simulated_time
[1320]	111
	112	USE cpulog, &
	113	ONLY: cpu_log, log_point_s
	114
	115	USE grid_variables, &
	116	ONLY: ddx, ddy, dx, dy
	117
	118	USE indices, &
[1359]	119	ONLY: nx, nxl, nxr, ny, nyn, nys, nzb, nzt
[1320]	120
	121	USE kinds
	122
[1359]	123	USE lpm_pack_arrays_mod, &
	124	ONLY: lpm_pack_arrays
	125
[1783]	126	USE netcdf_interface, &
	127	ONLY: netcdf_data_format
	128
[1320]	129	USE particle_attributes, &
[1822]	130	ONLY: alloc_factor, deleted_particles, grid_particles, &
	131	ibc_par_lr, ibc_par_ns, min_nr_particle, &
	132	mpi_particle_type, number_of_particles, &
	133	offset_ocean_nzt, offset_ocean_nzt_m1, particles, &
	134	particle_type, prt_count, trlp_count_sum, &
[1359]	135	trlp_count_recv_sum, trnp_count_sum, trnp_count_recv_sum, &
	136	trrp_count_sum, trrp_count_recv_sum, trsp_count_sum, &
[1822]	137	trsp_count_recv_sum, zero_particle
[1320]	138
[849]	139	USE pegrid
	140
	141	IMPLICIT NONE
	142
[1682]	143	INTEGER(iwp), PARAMETER :: NR_2_direction_move = 10000 !<
	144	INTEGER(iwp) :: nr_move_north !<
	145	INTEGER(iwp) :: nr_move_south !<
[1359]	146
[1929]	147	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: move_also_north
	148	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: move_also_south
[1359]	149
	150	SAVE
	151
	152	PRIVATE
[1936]	153	PUBLIC lpm_exchange_horiz, lpm_move_particle, realloc_particles_array, &
	154	dealloc_particles_array
[1359]	155
	156	INTERFACE lpm_exchange_horiz
	157	MODULE PROCEDURE lpm_exchange_horiz
	158	END INTERFACE lpm_exchange_horiz
	159
	160	INTERFACE lpm_move_particle
	161	MODULE PROCEDURE lpm_move_particle
	162	END INTERFACE lpm_move_particle
	163
	164	INTERFACE realloc_particles_array
	165	MODULE PROCEDURE realloc_particles_array
	166	END INTERFACE realloc_particles_array
	167
[1936]	168	INTERFACE dealloc_particles_array
	169	MODULE PROCEDURE dealloc_particles_array
	170	END INTERFACE dealloc_particles_array
[1359]	171	CONTAINS
	172
[1682]	173	!------------------------------------------------------------------------------!
	174	! Description:
	175	! ------------
	176	!> Exchange between subdomains.
	177	!> As soon as one particle has moved beyond the boundary of the domain, it
	178	!> is included in the relevant transfer arrays and marked for subsequent
	179	!> deletion on this PE.
	180	!> First sweep for crossings in x direction. Find out first the number of
	181	!> particles to be transferred and allocate temporary arrays needed to store
	182	!> them.
	183	!> For a one-dimensional decomposition along y, no transfer is necessary,
	184	!> because the particle remains on the PE, but the particle coordinate has to
	185	!> be adjusted.
	186	!------------------------------------------------------------------------------!
[1359]	187	SUBROUTINE lpm_exchange_horiz
	188
	189	IMPLICIT NONE
	190
[1929]	191	INTEGER(iwp) :: i !< grid index (x) of particle positition
	192	INTEGER(iwp) :: ip !< index variable along x
	193	INTEGER(iwp) :: j !< grid index (y) of particle positition
	194	INTEGER(iwp) :: jp !< index variable along y
	195	INTEGER(iwp) :: kp !< index variable along z
	196	INTEGER(iwp) :: n !< particle index variable
	197	INTEGER(iwp) :: trlp_count !< number of particles send to left PE
	198	INTEGER(iwp) :: trlp_count_recv !< number of particles receive from right PE
	199	INTEGER(iwp) :: trnp_count !< number of particles send to north PE
	200	INTEGER(iwp) :: trnp_count_recv !< number of particles receive from south PE
	201	INTEGER(iwp) :: trrp_count !< number of particles send to right PE
	202	INTEGER(iwp) :: trrp_count_recv !< number of particles receive from left PE
	203	INTEGER(iwp) :: trsp_count !< number of particles send to south PE
	204	INTEGER(iwp) :: trsp_count_recv !< number of particles receive from north PE
[849]	205
[1929]	206	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: rvlp !< particles received from right PE
	207	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: rvnp !< particles received from south PE
	208	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: rvrp !< particles received from left PE
	209	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: rvsp !< particles received from north PE
	210	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: trlp !< particles send to left PE
	211	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: trnp !< particles send to north PE
	212	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: trrp !< particles send to right PE
	213	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: trsp !< particles send to south PE
[849]	214
[1359]	215	CALL cpu_log( log_point_s(23), 'lpm_exchange_horiz', 'start' )
	216
[849]	217	#if defined( __parallel )
	218
[1822]	219	!
	220	!-- Exchange between subdomains.
	221	!-- As soon as one particle has moved beyond the boundary of the domain, it
	222	!-- is included in the relevant transfer arrays and marked for subsequent
	223	!-- deletion on this PE.
	224	!-- First sweep for crossings in x direction. Find out first the number of
	225	!-- particles to be transferred and allocate temporary arrays needed to store
	226	!-- them.
	227	!-- For a one-dimensional decomposition along y, no transfer is necessary,
	228	!-- because the particle remains on the PE, but the particle coordinate has to
	229	!-- be adjusted.
[849]	230	trlp_count = 0
	231	trrp_count = 0
	232
	233	trlp_count_recv = 0
	234	trrp_count_recv = 0
	235
	236	IF ( pdims(1) /= 1 ) THEN
	237	!
[1359]	238	!-- First calculate the storage necessary for sending and receiving the data.
	239	!-- Compute only first (nxl) and last (nxr) loop iterration.
	240	DO ip = nxl, nxr, nxr - nxl
	241	DO jp = nys, nyn
	242	DO kp = nzb+1, nzt
[849]	243
[1359]	244	number_of_particles = prt_count(kp,jp,ip)
	245	IF ( number_of_particles <= 0 ) CYCLE
	246	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	247	DO n = 1, number_of_particles
	248	IF ( particles(n)%particle_mask ) THEN
	249	i = ( particles(n)%x + 0.5_wp * dx ) * ddx
[1929]	250	!
	251	!-- Above calculation does not work for indices less than zero
[1359]	252	IF ( particles(n)%x < -0.5_wp * dx ) i = -1
	253
	254	IF ( i < nxl ) THEN
	255	trlp_count = trlp_count + 1
	256	ELSEIF ( i > nxr ) THEN
	257	trrp_count = trrp_count + 1
	258	ENDIF
	259	ENDIF
	260	ENDDO
	261
	262	ENDDO
	263	ENDDO
[849]	264	ENDDO
	265
	266	IF ( trlp_count == 0 ) trlp_count = 1
	267	IF ( trrp_count == 0 ) trrp_count = 1
	268
	269	ALLOCATE( trlp(trlp_count), trrp(trrp_count) )
	270
[1359]	271	trlp = zero_particle
	272	trrp = zero_particle
[849]	273
	274	trlp_count = 0
	275	trrp_count = 0
	276
	277	ENDIF
[1359]	278	!
	279	!-- Compute only first (nxl) and last (nxr) loop iterration
[1929]	280	DO ip = nxl, nxr, nxr-nxl
[1359]	281	DO jp = nys, nyn
	282	DO kp = nzb+1, nzt
	283	number_of_particles = prt_count(kp,jp,ip)
	284	IF ( number_of_particles <= 0 ) CYCLE
	285	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	286	DO n = 1, number_of_particles
	287	!
	288	!-- Only those particles that have not been marked as 'deleted' may
	289	!-- be moved.
	290	IF ( particles(n)%particle_mask ) THEN
[849]	291
[1359]	292	i = ( particles(n)%x + 0.5_wp * dx ) * ddx
[1929]	293	!
	294	!-- Above calculation does not work for indices less than zero
[1359]	295	IF ( particles(n)%x < - 0.5_wp * dx ) i = -1
[849]	296
[1359]	297	IF ( i < nxl ) THEN
	298	IF ( i < 0 ) THEN
[1929]	299	!
	300	!-- Apply boundary condition along x
[1359]	301	IF ( ibc_par_lr == 0 ) THEN
[1929]	302	!
	303	!-- Cyclic condition
[1359]	304	IF ( pdims(1) == 1 ) THEN
	305	particles(n)%x = ( nx + 1 ) * dx + particles(n)%x
	306	particles(n)%origin_x = ( nx + 1 ) * dx + &
	307	particles(n)%origin_x
	308	ELSE
	309	trlp_count = trlp_count + 1
	310	trlp(trlp_count) = particles(n)
	311	trlp(trlp_count)%x = ( nx + 1 ) * dx + trlp(trlp_count)%x
	312	trlp(trlp_count)%origin_x = trlp(trlp_count)%origin_x + &
	313	( nx + 1 ) * dx
	314	particles(n)%particle_mask = .FALSE.
	315	deleted_particles = deleted_particles + 1
[849]	316
[1359]	317	IF ( trlp(trlp_count)%x >= (nx + 0.5_wp)* dx - 1.0E-12_wp ) THEN
	318	trlp(trlp_count)%x = trlp(trlp_count)%x - 1.0E-10_wp
	319	!++ why is 1 subtracted in next statement???
	320	trlp(trlp_count)%origin_x = trlp(trlp_count)%origin_x - 1
	321	ENDIF
[849]	322
[1359]	323	ENDIF
[849]	324
[1359]	325	ELSEIF ( ibc_par_lr == 1 ) THEN
[1929]	326	!
	327	!-- Particle absorption
[1359]	328	particles(n)%particle_mask = .FALSE.
	329	deleted_particles = deleted_particles + 1
[849]	330
[1359]	331	ELSEIF ( ibc_par_lr == 2 ) THEN
[1929]	332	!
	333	!-- Particle reflection
[1359]	334	particles(n)%x = -particles(n)%x
	335	particles(n)%speed_x = -particles(n)%speed_x
[849]	336
[1359]	337	ENDIF
	338	ELSE
[1929]	339	!
	340	!-- Store particle data in the transfer array, which will be
	341	!-- send to the neighbouring PE
[1359]	342	trlp_count = trlp_count + 1
	343	trlp(trlp_count) = particles(n)
	344	particles(n)%particle_mask = .FALSE.
	345	deleted_particles = deleted_particles + 1
[849]	346
[1359]	347	ENDIF
[849]	348
[1359]	349	ELSEIF ( i > nxr ) THEN
	350	IF ( i > nx ) THEN
[1929]	351	!
	352	!-- Apply boundary condition along x
[1359]	353	IF ( ibc_par_lr == 0 ) THEN
[1929]	354	!
	355	!-- Cyclic condition
[1359]	356	IF ( pdims(1) == 1 ) THEN
	357	particles(n)%x = particles(n)%x - ( nx + 1 ) * dx
	358	particles(n)%origin_x = particles(n)%origin_x - &
	359	( nx + 1 ) * dx
	360	ELSE
	361	trrp_count = trrp_count + 1
	362	trrp(trrp_count) = particles(n)
	363	trrp(trrp_count)%x = trrp(trrp_count)%x - ( nx + 1 ) * dx
	364	trrp(trrp_count)%origin_x = trrp(trrp_count)%origin_x - &
	365	( nx + 1 ) * dx
	366	particles(n)%particle_mask = .FALSE.
	367	deleted_particles = deleted_particles + 1
[849]	368
[1359]	369	ENDIF
[849]	370
[1359]	371	ELSEIF ( ibc_par_lr == 1 ) THEN
[1929]	372	!
	373	!-- Particle absorption
[1359]	374	particles(n)%particle_mask = .FALSE.
	375	deleted_particles = deleted_particles + 1
[849]	376
[1359]	377	ELSEIF ( ibc_par_lr == 2 ) THEN
[1929]	378	!
	379	!-- Particle reflection
[1359]	380	particles(n)%x = 2 * ( nx * dx ) - particles(n)%x
	381	particles(n)%speed_x = -particles(n)%speed_x
[849]	382
[1359]	383	ENDIF
	384	ELSE
[1929]	385	!
	386	!-- Store particle data in the transfer array, which will be send
	387	!-- to the neighbouring PE
[1359]	388	trrp_count = trrp_count + 1
	389	trrp(trrp_count) = particles(n)
	390	particles(n)%particle_mask = .FALSE.
	391	deleted_particles = deleted_particles + 1
[849]	392
[1359]	393	ENDIF
[849]	394
[1359]	395	ENDIF
	396	ENDIF
[1929]	397
[1359]	398	ENDDO
	399	ENDDO
	400	ENDDO
[849]	401	ENDDO
	402
	403	!
[1929]	404	!-- Allocate arrays required for north-south exchange, as these
	405	!-- are used directly after particles are exchange along x-direction.
	406	ALLOCATE( move_also_north(1:NR_2_direction_move) )
	407	ALLOCATE( move_also_south(1:NR_2_direction_move) )
	408
	409	nr_move_north = 0
	410	nr_move_south = 0
	411	!
[849]	412	!-- Send left boundary, receive right boundary (but first exchange how many
	413	!-- and check, if particle storage must be extended)
	414	IF ( pdims(1) /= 1 ) THEN
	415
	416	CALL MPI_SENDRECV( trlp_count, 1, MPI_INTEGER, pleft, 0, &
	417	trrp_count_recv, 1, MPI_INTEGER, pright, 0, &
	418	comm2d, status, ierr )
	419
[1359]	420	ALLOCATE(rvrp(MAX(1,trrp_count_recv)))
[849]	421
[1359]	422	CALL MPI_SENDRECV( trlp(1)%radius, max(1,trlp_count), mpi_particle_type,&
	423	pleft, 1, rvrp(1)%radius, &
	424	max(1,trrp_count_recv), mpi_particle_type, pright, 1,&
[849]	425	comm2d, status, ierr )
	426
[1359]	427	IF ( trrp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvrp(1:trrp_count_recv))
	428
	429	DEALLOCATE(rvrp)
	430
[849]	431	!
	432	!-- Send right boundary, receive left boundary
	433	CALL MPI_SENDRECV( trrp_count, 1, MPI_INTEGER, pright, 0, &
	434	trlp_count_recv, 1, MPI_INTEGER, pleft, 0, &
	435	comm2d, status, ierr )
	436
[1359]	437	ALLOCATE(rvlp(MAX(1,trlp_count_recv)))
[849]	438
[1359]	439	CALL MPI_SENDRECV( trrp(1)%radius, max(1,trrp_count), mpi_particle_type,&
	440	pright, 1, rvlp(1)%radius, &
	441	max(1,trlp_count_recv), mpi_particle_type, pleft, 1, &
[849]	442	comm2d, status, ierr )
	443
[1359]	444	IF ( trlp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvlp(1:trlp_count_recv))
	445
[1822]	446	DEALLOCATE( rvlp )
[1359]	447	DEALLOCATE( trlp, trrp )
[849]	448
	449	ENDIF
	450
	451	!
	452	!-- Check whether particles have crossed the boundaries in y direction. Note
	453	!-- that this case can also apply to particles that have just been received
	454	!-- from the adjacent right or left PE.
	455	!-- Find out first the number of particles to be transferred and allocate
	456	!-- temporary arrays needed to store them.
[1929]	457	!-- For a one-dimensional decomposition along y, no transfer is necessary,
[849]	458	!-- because the particle remains on the PE.
[1359]	459	trsp_count = nr_move_south
	460	trnp_count = nr_move_north
[849]	461
	462	trsp_count_recv = 0
	463	trnp_count_recv = 0
	464
	465	IF ( pdims(2) /= 1 ) THEN
	466	!
	467	!-- First calculate the storage necessary for sending and receiving the
	468	!-- data
[1359]	469	DO ip = nxl, nxr
[1929]	470	DO jp = nys, nyn, nyn-nys !compute only first (nys) and last (nyn) loop iterration
[1359]	471	DO kp = nzb+1, nzt
	472	number_of_particles = prt_count(kp,jp,ip)
	473	IF ( number_of_particles <= 0 ) CYCLE
	474	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	475	DO n = 1, number_of_particles
	476	IF ( particles(n)%particle_mask ) THEN
	477	j = ( particles(n)%y + 0.5_wp * dy ) * ddy
[849]	478	!
[1359]	479	!-- Above calculation does not work for indices less than zero
	480	IF ( particles(n)%y < -0.5_wp * dy ) j = -1
[849]	481
[1359]	482	IF ( j < nys ) THEN
	483	trsp_count = trsp_count + 1
	484	ELSEIF ( j > nyn ) THEN
	485	trnp_count = trnp_count + 1
	486	ENDIF
	487	ENDIF
	488	ENDDO
	489	ENDDO
	490	ENDDO
[849]	491	ENDDO
	492
	493	IF ( trsp_count == 0 ) trsp_count = 1
	494	IF ( trnp_count == 0 ) trnp_count = 1
	495
	496	ALLOCATE( trsp(trsp_count), trnp(trnp_count) )
	497
[1359]	498	trsp = zero_particle
	499	trnp = zero_particle
[849]	500
[1359]	501	trsp_count = nr_move_south
	502	trnp_count = nr_move_north
[1929]	503
[1359]	504	trsp(1:nr_move_south) = move_also_south(1:nr_move_south)
	505	trnp(1:nr_move_north) = move_also_north(1:nr_move_north)
	506
[849]	507	ENDIF
	508
[1359]	509	DO ip = nxl, nxr
	510	DO jp = nys, nyn, nyn-nys ! compute only first (nys) and last (nyn) loop iterration
	511	DO kp = nzb+1, nzt
	512	number_of_particles = prt_count(kp,jp,ip)
	513	IF ( number_of_particles <= 0 ) CYCLE
	514	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	515	DO n = 1, number_of_particles
[849]	516	!
[1359]	517	!-- Only those particles that have not been marked as 'deleted' may
	518	!-- be moved.
	519	IF ( particles(n)%particle_mask ) THEN
[1929]	520
[1359]	521	j = ( particles(n)%y + 0.5_wp * dy ) * ddy
[849]	522	!
[1359]	523	!-- Above calculation does not work for indices less than zero
	524	IF ( particles(n)%y < -0.5_wp * dy ) j = -1
[849]	525
[1359]	526	IF ( j < nys ) THEN
	527	IF ( j < 0 ) THEN
[849]	528	!
[1359]	529	!-- Apply boundary condition along y
	530	IF ( ibc_par_ns == 0 ) THEN
[849]	531	!
[1359]	532	!-- Cyclic condition
	533	IF ( pdims(2) == 1 ) THEN
	534	particles(n)%y = ( ny + 1 ) * dy + particles(n)%y
	535	particles(n)%origin_y = ( ny + 1 ) * dy + &
[1929]	536	particles(n)%origin_y
[1359]	537	ELSE
[1929]	538	trsp_count = trsp_count + 1
	539	trsp(trsp_count) = particles(n)
[1359]	540	trsp(trsp_count)%y = ( ny + 1 ) * dy + &
[1929]	541	trsp(trsp_count)%y
[1359]	542	trsp(trsp_count)%origin_y = trsp(trsp_count)%origin_y &
[1929]	543	+ ( ny + 1 ) * dy
[1359]	544	particles(n)%particle_mask = .FALSE.
	545	deleted_particles = deleted_particles + 1
[849]	546
[1359]	547	IF ( trsp(trsp_count)%y >= (ny+0.5_wp)* dy - 1.0E-12_wp ) THEN
	548	trsp(trsp_count)%y = trsp(trsp_count)%y - 1.0E-10_wp
	549	!++ why is 1 subtracted in next statement???
	550	trsp(trsp_count)%origin_y = &
[1929]	551	trsp(trsp_count)%origin_y - 1
[1359]	552	ENDIF
[849]	553
[1359]	554	ENDIF
[849]	555
[1359]	556	ELSEIF ( ibc_par_ns == 1 ) THEN
[849]	557	!
[1359]	558	!-- Particle absorption
	559	particles(n)%particle_mask = .FALSE.
[1929]	560	deleted_particles = deleted_particles + 1
[849]	561
[1359]	562	ELSEIF ( ibc_par_ns == 2 ) THEN
[849]	563	!
[1359]	564	!-- Particle reflection
	565	particles(n)%y = -particles(n)%y
	566	particles(n)%speed_y = -particles(n)%speed_y
[849]	567
[1359]	568	ENDIF
	569	ELSE
[849]	570	!
[1359]	571	!-- Store particle data in the transfer array, which will
	572	!-- be send to the neighbouring PE
	573	trsp_count = trsp_count + 1
	574	trsp(trsp_count) = particles(n)
	575	particles(n)%particle_mask = .FALSE.
	576	deleted_particles = deleted_particles + 1
[849]	577
[1359]	578	ENDIF
[849]	579
[1359]	580	ELSEIF ( j > nyn ) THEN
	581	IF ( j > ny ) THEN
[849]	582	!
[1929]	583	!-- Apply boundary condition along y
[1359]	584	IF ( ibc_par_ns == 0 ) THEN
[849]	585	!
[1359]	586	!-- Cyclic condition
	587	IF ( pdims(2) == 1 ) THEN
[1929]	588	particles(n)%y = particles(n)%y - ( ny + 1 ) * dy
[1359]	589	particles(n)%origin_y = &
[1929]	590	particles(n)%origin_y - ( ny + 1 ) * dy
[1359]	591	ELSE
[1929]	592	trnp_count = trnp_count + 1
	593	trnp(trnp_count) = particles(n)
[1359]	594	trnp(trnp_count)%y = &
[1929]	595	trnp(trnp_count)%y - ( ny + 1 ) * dy
[1359]	596	trnp(trnp_count)%origin_y = &
[1929]	597	trnp(trnp_count)%origin_y - ( ny + 1 ) * dy
[1359]	598	particles(n)%particle_mask = .FALSE.
[1929]	599	deleted_particles = deleted_particles + 1
[1359]	600	ENDIF
[849]	601
[1359]	602	ELSEIF ( ibc_par_ns == 1 ) THEN
[849]	603	!
[1359]	604	!-- Particle absorption
	605	particles(n)%particle_mask = .FALSE.
	606	deleted_particles = deleted_particles + 1
[849]	607
[1359]	608	ELSEIF ( ibc_par_ns == 2 ) THEN
[849]	609	!
[1359]	610	!-- Particle reflection
	611	particles(n)%y = 2 * ( ny * dy ) - particles(n)%y
	612	particles(n)%speed_y = -particles(n)%speed_y
[849]	613
[1359]	614	ENDIF
	615	ELSE
[849]	616	!
[1359]	617	!-- Store particle data in the transfer array, which will
	618	!-- be send to the neighbouring PE
	619	trnp_count = trnp_count + 1
	620	trnp(trnp_count) = particles(n)
	621	particles(n)%particle_mask = .FALSE.
	622	deleted_particles = deleted_particles + 1
[849]	623
[1359]	624	ENDIF
	625
	626	ENDIF
[849]	627	ENDIF
[1359]	628	ENDDO
	629	ENDDO
	630	ENDDO
[849]	631	ENDDO
	632
	633	!
	634	!-- Send front boundary, receive back boundary (but first exchange how many
	635	!-- and check, if particle storage must be extended)
	636	IF ( pdims(2) /= 1 ) THEN
	637
	638	CALL MPI_SENDRECV( trsp_count, 1, MPI_INTEGER, psouth, 0, &
	639	trnp_count_recv, 1, MPI_INTEGER, pnorth, 0, &
	640	comm2d, status, ierr )
	641
[1359]	642	ALLOCATE(rvnp(MAX(1,trnp_count_recv)))
[1929]	643
[1359]	644	CALL MPI_SENDRECV( trsp(1)%radius, trsp_count, mpi_particle_type, &
	645	psouth, 1, rvnp(1)%radius, &
[849]	646	trnp_count_recv, mpi_particle_type, pnorth, 1, &
	647	comm2d, status, ierr )
	648
[1359]	649	IF ( trnp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvnp(1:trnp_count_recv))
	650
	651	DEALLOCATE(rvnp)
	652
[849]	653	!
	654	!-- Send back boundary, receive front boundary
	655	CALL MPI_SENDRECV( trnp_count, 1, MPI_INTEGER, pnorth, 0, &
	656	trsp_count_recv, 1, MPI_INTEGER, psouth, 0, &
	657	comm2d, status, ierr )
	658
[1359]	659	ALLOCATE(rvsp(MAX(1,trsp_count_recv)))
[849]	660
[1359]	661	CALL MPI_SENDRECV( trnp(1)%radius, trnp_count, mpi_particle_type, &
	662	pnorth, 1, rvsp(1)%radius, &
[849]	663	trsp_count_recv, mpi_particle_type, psouth, 1, &
	664	comm2d, status, ierr )
	665
[1359]	666	IF ( trsp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvsp(1:trsp_count_recv))
	667
	668	DEALLOCATE(rvsp)
	669
[849]	670	number_of_particles = number_of_particles + trsp_count_recv
	671
	672	DEALLOCATE( trsp, trnp )
	673
	674	ENDIF
	675
[1929]	676	DEALLOCATE( move_also_north )
	677	DEALLOCATE( move_also_south )
	678
[849]	679	#else
	680
[1929]	681	DO ip = nxl, nxr, nxr-nxl
	682	DO jp = nys, nyn
	683	DO kp = nzb+1, nzt
	684	number_of_particles = prt_count(kp,jp,ip)
	685	IF ( number_of_particles <= 0 ) CYCLE
	686	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	687	DO n = 1, number_of_particles
[849]	688	!
[1929]	689	!-- Apply boundary conditions
[849]	690
[1929]	691	IF ( particles(n)%x < -0.5_wp * dx ) THEN
[849]	692
[1929]	693	IF ( ibc_par_lr == 0 ) THEN
[849]	694	!
[1929]	695	!-- Cyclic boundary. Relevant coordinate has to be changed.
	696	particles(n)%x = ( nx + 1 ) * dx + particles(n)%x
[1822]	697
[1929]	698	ELSEIF ( ibc_par_lr == 1 ) THEN
[849]	699	!
[1929]	700	!-- Particle absorption
	701	particles(n)%particle_mask = .FALSE.
	702	deleted_particles = deleted_particles + 1
[1822]	703
[1929]	704	ELSEIF ( ibc_par_lr == 2 ) THEN
[849]	705	!
[1929]	706	!-- Particle reflection
	707	particles(n)%x = -dx - particles(n)%x
	708	particles(n)%speed_x = -particles(n)%speed_x
	709	ENDIF
[849]	710
[1929]	711	ELSEIF ( particles(n)%x >= ( nx + 0.5_wp ) * dx ) THEN
[849]	712
[1929]	713	IF ( ibc_par_lr == 0 ) THEN
[849]	714	!
[1929]	715	!-- Cyclic boundary. Relevant coordinate has to be changed.
	716	particles(n)%x = particles(n)%x - ( nx + 1 ) * dx
[1822]	717
[1929]	718	ELSEIF ( ibc_par_lr == 1 ) THEN
[849]	719	!
[1929]	720	!-- Particle absorption
	721	particles(n)%particle_mask = .FALSE.
	722	deleted_particles = deleted_particles + 1
[1822]	723
[1929]	724	ELSEIF ( ibc_par_lr == 2 ) THEN
[849]	725	!
[1929]	726	!-- Particle reflection
	727	particles(n)%x = ( nx + 1 ) * dx - particles(n)%x
	728	particles(n)%speed_x = -particles(n)%speed_x
	729	ENDIF
[849]	730
[1929]	731	ENDIF
	732	ENDDO
	733	ENDDO
	734	ENDDO
	735	ENDDO
[849]	736
[1929]	737	DO ip = nxl, nxr
	738	DO jp = nys, nyn, nyn-nys
	739	DO kp = nzb+1, nzt
	740	number_of_particles = prt_count(kp,jp,ip)
	741	IF ( number_of_particles <= 0 ) CYCLE
	742	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	743	DO n = 1, number_of_particles
[849]	744
[1929]	745	IF ( particles(n)%y < -0.5_wp * dy ) THEN
	746
	747	IF ( ibc_par_ns == 0 ) THEN
[849]	748	!
[1929]	749	!-- Cyclic boundary. Relevant coordinate has to be changed.
	750	particles(n)%y = ( ny + 1 ) * dy + particles(n)%y
[1822]	751
[1929]	752	ELSEIF ( ibc_par_ns == 1 ) THEN
[849]	753	!
[1929]	754	!-- Particle absorption
	755	particles(n)%particle_mask = .FALSE.
	756	deleted_particles = deleted_particles + 1
[1822]	757
[1929]	758	ELSEIF ( ibc_par_ns == 2 ) THEN
[849]	759	!
[1929]	760	!-- Particle reflection
	761	particles(n)%y = -dy - particles(n)%y
	762	particles(n)%speed_y = -particles(n)%speed_y
	763	ENDIF
[849]	764
[1929]	765	ELSEIF ( particles(n)%y >= ( ny + 0.5_wp ) * dy ) THEN
[849]	766
[1929]	767	IF ( ibc_par_ns == 0 ) THEN
[849]	768	!
[1929]	769	!-- Cyclic boundary. Relevant coordinate has to be changed.
	770	particles(n)%y = particles(n)%y - ( ny + 1 ) * dy
[1822]	771
[1929]	772	ELSEIF ( ibc_par_ns == 1 ) THEN
[849]	773	!
[1929]	774	!-- Particle absorption
	775	particles(n)%particle_mask = .FALSE.
	776	deleted_particles = deleted_particles + 1
[1822]	777
[1929]	778	ELSEIF ( ibc_par_ns == 2 ) THEN
[849]	779	!
[1929]	780	!-- Particle reflection
	781	particles(n)%y = ( ny + 1 ) * dy - particles(n)%y
	782	particles(n)%speed_y = -particles(n)%speed_y
	783	ENDIF
[849]	784
[1929]	785	ENDIF
	786
	787	ENDDO
	788	ENDDO
	789	ENDDO
[849]	790	ENDDO
	791	#endif
	792
	793	!
	794	!-- Accumulate the number of particles transferred between the subdomains
	795	#if defined( __parallel )
	796	trlp_count_sum = trlp_count_sum + trlp_count
	797	trlp_count_recv_sum = trlp_count_recv_sum + trlp_count_recv
	798	trrp_count_sum = trrp_count_sum + trrp_count
	799	trrp_count_recv_sum = trrp_count_recv_sum + trrp_count_recv
	800	trsp_count_sum = trsp_count_sum + trsp_count
	801	trsp_count_recv_sum = trsp_count_recv_sum + trsp_count_recv
	802	trnp_count_sum = trnp_count_sum + trnp_count
	803	trnp_count_recv_sum = trnp_count_recv_sum + trnp_count_recv
	804	#endif
	805
[1359]	806	CALL cpu_log( log_point_s(23), 'lpm_exchange_horiz', 'stop' )
[849]	807
	808	END SUBROUTINE lpm_exchange_horiz
[1359]	809
[1682]	810	!------------------------------------------------------------------------------!
	811	! Description:
	812	! ------------
	813	!> If a particle moves from one processor to another, this subroutine moves
	814	!> the corresponding elements from the particle arrays of the old grid cells
	815	!> to the particle arrays of the new grid cells.
	816	!------------------------------------------------------------------------------!
[1359]	817	SUBROUTINE Add_particles_to_gridcell (particle_array)
	818
	819	IMPLICIT NONE
	820
[1929]	821	INTEGER(iwp) :: ip !< grid index (x) of particle
	822	INTEGER(iwp) :: jp !< grid index (x) of particle
	823	INTEGER(iwp) :: kp !< grid index (x) of particle
	824	INTEGER(iwp) :: n !< index variable of particle
	825	INTEGER(iwp) :: pindex !< dummy argument for new number of particles per grid box
[1359]	826
[1682]	827	LOGICAL :: pack_done !<
[1359]	828
[1929]	829	TYPE(particle_type), DIMENSION(:), INTENT(IN) :: particle_array !< new particles in a grid box
	830	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: temp_ns !< temporary particle array for reallocation
[1359]	831
	832	pack_done = .FALSE.
	833
[1929]	834	DO n = 1, SIZE(particle_array)
[1359]	835
[1929]	836	IF ( .NOT. particle_array(n)%particle_mask ) CYCLE
	837
[1359]	838	ip = ( particle_array(n)%x + 0.5_wp * dx ) * ddx
	839	jp = ( particle_array(n)%y + 0.5_wp * dy ) * ddy
[1929]	840	kp = particle_array(n)%z / dz + 1 + offset_ocean_nzt
[1359]	841
	842	IF ( ip >= nxl .AND. ip <= nxr .AND. jp >= nys .AND. jp <= nyn &
	843	.AND. kp >= nzb+1 .AND. kp <= nzt) THEN ! particle stays on processor
	844	number_of_particles = prt_count(kp,jp,ip)
	845	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	846
	847	pindex = prt_count(kp,jp,ip)+1
	848	IF( pindex > SIZE(grid_particles(kp,jp,ip)%particles) ) THEN
	849	IF ( pack_done ) THEN
	850	CALL realloc_particles_array (ip,jp,kp)
	851	ELSE
	852	CALL lpm_pack_arrays
	853	prt_count(kp,jp,ip) = number_of_particles
	854	pindex = prt_count(kp,jp,ip)+1
	855	IF ( pindex > SIZE(grid_particles(kp,jp,ip)%particles) ) THEN
	856	CALL realloc_particles_array (ip,jp,kp)
	857	ENDIF
	858	pack_done = .TRUE.
	859	ENDIF
	860	ENDIF
	861	grid_particles(kp,jp,ip)%particles(pindex) = particle_array(n)
	862	prt_count(kp,jp,ip) = pindex
	863	ELSE
[1929]	864	IF ( jp <= nys - 1 ) THEN
[1359]	865	nr_move_south = nr_move_south+1
[1929]	866	!
	867	!-- Before particle information is swapped to exchange-array, check
	868	!-- if enough memory is allocated. If required, reallocate exchange
	869	!-- array.
	870	IF ( nr_move_south > SIZE(move_also_south) ) THEN
	871	!
	872	!-- At first, allocate further temporary array to swap particle
	873	!-- information.
	874	ALLOCATE( temp_ns(SIZE(move_also_south)+NR_2_direction_move) )
	875	temp_ns(1:nr_move_south-1) = move_also_south(1:nr_move_south-1)
	876	DEALLOCATE( move_also_south )
	877	ALLOCATE( move_also_south(SIZE(temp_ns)) )
	878	move_also_south(1:nr_move_south-1) = temp_ns(1:nr_move_south-1)
	879	DEALLOCATE( temp_ns )
	880
	881	ENDIF
	882
[1359]	883	move_also_south(nr_move_south) = particle_array(n)
[1929]	884
[1359]	885	IF ( jp == -1 ) THEN
[2245]	886	!
	887	!-- Apply boundary condition along y
	888	IF ( ibc_par_ns == 0 ) THEN
	889	move_also_south(nr_move_south)%y = &
	890	move_also_south(nr_move_south)%y + ( ny + 1 ) * dy
	891	move_also_south(nr_move_south)%origin_y = &
	892	move_also_south(nr_move_south)%origin_y + ( ny + 1 ) * dy
	893	ELSEIF ( ibc_par_ns == 1 ) THEN
	894	!
	895	!-- Particle absorption
	896	move_also_south(nr_move_south)%particle_mask = .FALSE.
	897	deleted_particles = deleted_particles + 1
	898
	899	ELSEIF ( ibc_par_ns == 2 ) THEN
	900	!
	901	!-- Particle reflection
	902	move_also_south(nr_move_south)%y = &
	903	-move_also_south(nr_move_south)%y
	904	move_also_south(nr_move_south)%speed_y = &
	905	-move_also_south(nr_move_south)%speed_y
	906
	907	ENDIF
[1359]	908	ENDIF
[1929]	909	ELSEIF ( jp >= nyn+1 ) THEN
[1359]	910	nr_move_north = nr_move_north+1
[1929]	911	!
	912	!-- Before particle information is swapped to exchange-array, check
	913	!-- if enough memory is allocated. If required, reallocate exchange
	914	!-- array.
	915	IF ( nr_move_north > SIZE(move_also_north) ) THEN
	916	!
	917	!-- At first, allocate further temporary array to swap particle
	918	!-- information.
	919	ALLOCATE( temp_ns(SIZE(move_also_north)+NR_2_direction_move) )
	920	temp_ns(1:nr_move_north-1) = move_also_south(1:nr_move_north-1)
	921	DEALLOCATE( move_also_north )
	922	ALLOCATE( move_also_north(SIZE(temp_ns)) )
	923	move_also_north(1:nr_move_north-1) = temp_ns(1:nr_move_north-1)
	924	DEALLOCATE( temp_ns )
	925
	926	ENDIF
	927
[1359]	928	move_also_north(nr_move_north) = particle_array(n)
	929	IF ( jp == ny+1 ) THEN
[2245]	930	!
	931	!-- Apply boundary condition along y
	932	IF ( ibc_par_ns == 0 ) THEN
	933
	934	move_also_north(nr_move_north)%y = &
	935	move_also_north(nr_move_north)%y - ( ny + 1 ) * dy
	936	move_also_north(nr_move_north)%origin_y = &
	937	move_also_north(nr_move_north)%origin_y - ( ny + 1 ) * dy
	938	ELSEIF ( ibc_par_ns == 1 ) THEN
	939	!
	940	!-- Particle absorption
	941	move_also_north(nr_move_north)%particle_mask = .FALSE.
	942	deleted_particles = deleted_particles + 1
	943
	944	ELSEIF ( ibc_par_ns == 2 ) THEN
	945	!
	946	!-- Particle reflection
	947	move_also_north(nr_move_north)%y = &
	948	-move_also_north(nr_move_north)%y
	949	move_also_north(nr_move_north)%speed_y = &
	950	-move_also_north(nr_move_north)%speed_y
	951
	952	ENDIF
[1359]	953	ENDIF
	954	ELSE
	955	WRITE(0,'(a,8i7)') 'particle out of range ',myid,ip,jp,kp,nxl,nxr,nys,nyn
	956	ENDIF
	957	ENDIF
	958	ENDDO
	959
	960	RETURN
	961
	962	END SUBROUTINE Add_particles_to_gridcell
	963
	964
	965
	966
[1682]	967	!------------------------------------------------------------------------------!
	968	! Description:
	969	! ------------
	970	!> If a particle moves from one grid cell to another (on the current
	971	!> processor!), this subroutine moves the corresponding element from the
	972	!> particle array of the old grid cell to the particle array of the new grid
	973	!> cell.
	974	!------------------------------------------------------------------------------!
[1359]	975	SUBROUTINE lpm_move_particle
	976
	977	IMPLICIT NONE
	978
[1929]	979	INTEGER(iwp) :: i !< grid index (x) of particle position
	980	INTEGER(iwp) :: ip !< index variable along x
	981	INTEGER(iwp) :: j !< grid index (y) of particle position
	982	INTEGER(iwp) :: jp !< index variable along y
	983	INTEGER(iwp) :: k !< grid index (z) of particle position
	984	INTEGER(iwp) :: kp !< index variable along z
	985	INTEGER(iwp) :: n !< index variable for particle array
	986	INTEGER(iwp) :: np_old_cell !< number of particles per grid box before moving
	987	INTEGER(iwp) :: n_start !< start index
	988	INTEGER(iwp) :: pindex !< dummy argument for number of new particle per grid box
[1359]	989
[1682]	990	LOGICAL :: pack_done !<
[1359]	991
[1929]	992	TYPE(particle_type), DIMENSION(:), POINTER :: particles_old_cell !< particles before moving
[1359]	993
	994	CALL cpu_log( log_point_s(41), 'lpm_move_particle', 'start' )
	995
	996	DO ip = nxl, nxr
	997	DO jp = nys, nyn
	998	DO kp = nzb+1, nzt
	999
	1000	np_old_cell = prt_count(kp,jp,ip)
	1001	IF ( np_old_cell <= 0 ) CYCLE
	1002	particles_old_cell => grid_particles(kp,jp,ip)%particles(1:np_old_cell)
	1003	n_start = -1
	1004
	1005	DO n = 1, np_old_cell
	1006	i = ( particles_old_cell(n)%x + 0.5_wp * dx ) * ddx
	1007	j = ( particles_old_cell(n)%y + 0.5_wp * dy ) * ddy
	1008	k = particles_old_cell(n)%z / dz + 1 + offset_ocean_nzt
	1009	!
	1010	!-- Check, if particle has moved to another grid cell.
	1011	IF ( i /= ip .OR. j /= jp .OR. k /= kp ) THEN
	1012	!
	1013	!-- The particle has moved to another grid cell. Now check, if
	1014	!-- particle stays on the same processor.
	1015	IF ( i >= nxl .AND. i <= nxr .AND. j >= nys .AND. &
	1016	j <= nyn .AND. k >= nzb+1 .AND. k <= nzt) THEN
	1017	!
	1018	!-- If the particle stays on the same processor, the particle
	1019	!-- will be added to the particle array of the new processor.
	1020	number_of_particles = prt_count(k,j,i)
	1021	particles => grid_particles(k,j,i)%particles(1:number_of_particles)
	1022
	1023	pindex = prt_count(k,j,i)+1
	1024	IF ( pindex > SIZE(grid_particles(k,j,i)%particles) ) &
	1025	THEN
	1026	n_start = n
	1027	EXIT
	1028	ENDIF
	1029
	1030	grid_particles(k,j,i)%particles(pindex) = particles_old_cell(n)
	1031	prt_count(k,j,i) = pindex
	1032
	1033	particles_old_cell(n)%particle_mask = .FALSE.
	1034	ENDIF
	1035	ENDIF
	1036	ENDDO
	1037
[1691]	1038	IF ( n_start >= 0 ) THEN
[1359]	1039	pack_done = .FALSE.
	1040	DO n = n_start, np_old_cell
	1041	i = ( particles_old_cell(n)%x + 0.5_wp * dx ) * ddx
	1042	j = ( particles_old_cell(n)%y + 0.5_wp * dy ) * ddy
	1043	k = particles_old_cell(n)%z / dz + 1 + offset_ocean_nzt
	1044	IF ( i /= ip .OR. j /= jp .OR. k /= kp ) THEN
	1045	!
	1046	!-- Particle is in different box
	1047	IF ( i >= nxl .AND. i <= nxr .AND. j >= nys .AND. &
	1048	j <= nyn .AND. k >= nzb+1 .AND. k <= nzt) THEN
	1049	!
	1050	!-- Particle stays on processor
	1051	number_of_particles = prt_count(k,j,i)
	1052	particles => grid_particles(k,j,i)%particles(1:number_of_particles)
	1053
	1054	pindex = prt_count(k,j,i)+1
	1055	IF ( pindex > SIZE(grid_particles(k,j,i)%particles) ) &
	1056	THEN
	1057	IF ( pack_done ) THEN
	1058	CALL realloc_particles_array(i,j,k)
	1059	ELSE
	1060	CALL lpm_pack_arrays
	1061	prt_count(k,j,i) = number_of_particles
	1062	!
[2151]	1063	!-- Set pindex to next index of the modified
	1064	!-- particle-array (due to lpm_pack_arrays)
	1065	pindex = prt_count(k,j,i)+1
	1066	!
[1359]	1067	!-- If number of particles in the new grid box
	1068	!-- exceeds its allocated memory, the particle array
	1069	!-- will be reallocated
	1070	IF ( pindex > SIZE(grid_particles(k,j,i)%particles) ) THEN
	1071	CALL realloc_particles_array(i,j,k)
	1072	ENDIF
	1073
	1074	pack_done = .TRUE.
	1075	ENDIF
	1076	ENDIF
	1077
	1078	grid_particles(k,j,i)%particles(pindex) = particles_old_cell(n)
	1079	prt_count(k,j,i) = pindex
	1080
	1081	particles_old_cell(n)%particle_mask = .FALSE.
	1082	ENDIF
	1083	ENDIF
	1084	ENDDO
	1085	ENDIF
	1086	ENDDO
	1087	ENDDO
	1088	ENDDO
	1089
	1090	CALL cpu_log( log_point_s(41), 'lpm_move_particle', 'stop' )
	1091
	1092	RETURN
	1093
	1094	END SUBROUTINE lpm_move_particle
	1095
[1682]	1096	!------------------------------------------------------------------------------!
	1097	! Description:
	1098	! ------------
[1929]	1099	!> If the allocated memory for the particle array do not suffice to add arriving
	1100	!> particles from neighbour grid cells, this subrouting reallocates the
	1101	!> particle array to assure enough memory is available.
[1682]	1102	!------------------------------------------------------------------------------!
[1359]	1103	SUBROUTINE realloc_particles_array (i,j,k,size_in)
	1104
	1105	IMPLICIT NONE
	1106
[1682]	1107	INTEGER(iwp), INTENT(in) :: i !<
	1108	INTEGER(iwp), INTENT(in) :: j !<
	1109	INTEGER(iwp), INTENT(in) :: k !<
[1822]	1110	INTEGER(iwp), INTENT(in), OPTIONAL :: size_in !<
[1359]	1111
[1682]	1112	INTEGER(iwp) :: old_size !<
	1113	INTEGER(iwp) :: new_size !<
	1114	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: tmp_particles_d !<
	1115	TYPE(particle_type), DIMENSION(500) :: tmp_particles_s !<
[1359]	1116
	1117	old_size = SIZE(grid_particles(k,j,i)%particles)
	1118
	1119	IF ( PRESENT(size_in) ) THEN
	1120	new_size = size_in
	1121	ELSE
[1822]	1122	new_size = old_size * ( 1.0_wp + alloc_factor / 100.0_wp )
[1359]	1123	ENDIF
	1124
[1929]	1125	new_size = MAX( new_size, min_nr_particle, old_size + 1 )
[1359]	1126
	1127	IF ( old_size <= 500 ) THEN
	1128
	1129	tmp_particles_s(1:old_size) = grid_particles(k,j,i)%particles(1:old_size)
	1130
	1131	DEALLOCATE(grid_particles(k,j,i)%particles)
	1132	ALLOCATE(grid_particles(k,j,i)%particles(new_size))
	1133
	1134	grid_particles(k,j,i)%particles(1:old_size) = tmp_particles_s(1:old_size)
	1135	grid_particles(k,j,i)%particles(old_size+1:new_size) = zero_particle
	1136
	1137	ELSE
	1138
	1139	ALLOCATE(tmp_particles_d(new_size))
	1140	tmp_particles_d(1:old_size) = grid_particles(k,j,i)%particles
	1141
	1142	DEALLOCATE(grid_particles(k,j,i)%particles)
	1143	ALLOCATE(grid_particles(k,j,i)%particles(new_size))
	1144
	1145	grid_particles(k,j,i)%particles(1:old_size) = tmp_particles_d(1:old_size)
	1146	grid_particles(k,j,i)%particles(old_size+1:new_size) = zero_particle
	1147
	1148	DEALLOCATE(tmp_particles_d)
	1149
	1150	ENDIF
	1151	particles => grid_particles(k,j,i)%particles(1:number_of_particles)
	1152
	1153	RETURN
	1154	END SUBROUTINE realloc_particles_array
	1155
[1936]	1156
	1157
	1158
	1159
	1160	SUBROUTINE dealloc_particles_array
	1161
	1162	IMPLICIT NONE
	1163
	1164	INTEGER(iwp) :: i
	1165	INTEGER(iwp) :: j
	1166	INTEGER(iwp) :: k
	1167	INTEGER(iwp) :: old_size !<
	1168	INTEGER(iwp) :: new_size !<
	1169
	1170	LOGICAL :: dealloc
	1171
	1172	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: tmp_particles_d !<
	1173	TYPE(particle_type), DIMENSION(500) :: tmp_particles_s !<
	1174
	1175	DO i = nxl, nxr
	1176	DO j = nys, nyn
	1177	DO k = nzb+1, nzt
	1178	!
	1179	!-- Determine number of active particles
	1180	number_of_particles = prt_count(k,j,i)
	1181	!
	1182	!-- Determine allocated memory size
	1183	old_size = SIZE( grid_particles(k,j,i)%particles )
	1184	!
	1185	!-- Check for large unused memory
	1186	dealloc = ( ( number_of_particles < min_nr_particle .AND. &
	1187	old_size > min_nr_particle ) .OR. &
	1188	( number_of_particles > min_nr_particle .AND. &
	1189	old_size - number_of_particles * &
	1190	( 1.0_wp + 0.01_wp * alloc_factor ) > 0.0_wp ) )
	1191
	1192
	1193	IF ( dealloc ) THEN
	1194	IF ( number_of_particles < min_nr_particle ) THEN
	1195	new_size = min_nr_particle
	1196	ELSE
	1197	new_size = INT( number_of_particles * ( 1.0_wp + 0.01_wp * alloc_factor ) )
	1198	ENDIF
	1199
	1200	IF ( number_of_particles <= 500 ) THEN
	1201
	1202	tmp_particles_s(1:number_of_particles) = grid_particles(k,j,i)%particles(1:number_of_particles)
	1203
	1204	DEALLOCATE(grid_particles(k,j,i)%particles)
	1205	ALLOCATE(grid_particles(k,j,i)%particles(new_size))
	1206
	1207	grid_particles(k,j,i)%particles(1:number_of_particles) = tmp_particles_s(1:number_of_particles)
	1208	grid_particles(k,j,i)%particles(number_of_particles+1:new_size) = zero_particle
	1209
	1210	ELSE
	1211
	1212	ALLOCATE(tmp_particles_d(number_of_particles))
	1213	tmp_particles_d(1:number_of_particles) = grid_particles(k,j,i)%particles(1:number_of_particles)
	1214
	1215	DEALLOCATE(grid_particles(k,j,i)%particles)
	1216	ALLOCATE(grid_particles(k,j,i)%particles(new_size))
	1217
	1218	grid_particles(k,j,i)%particles(1:number_of_particles) = tmp_particles_d(1:number_of_particles)
	1219	grid_particles(k,j,i)%particles(number_of_particles+1:new_size) = zero_particle
	1220
	1221	DEALLOCATE(tmp_particles_d)
	1222
	1223	ENDIF
	1224
	1225	ENDIF
	1226	ENDDO
	1227	ENDDO
	1228	ENDDO
	1229
	1230	END SUBROUTINE dealloc_particles_array
	1231
	1232
[1359]	1233	END MODULE lpm_exchange_horiz_mod

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