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source: palm/trunk/SOURCE/lpm_exchange_horiz.f90 @ 2273

Last change on this file since 2273 was 2245, checked in by schwenkel, 8 years ago
Bugfix in Add_particles_to_gridcell
Property svn:keywords set to `Id`
File size: 47.9 KB

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1	!> @file lpm_exchange_horiz.f90
2	!------------------------------------------------------------------------------!
3	! This file is part of PALM.
4	!
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.
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	!
17	! Copyright 1997-2017 Leibniz Universitaet Hannover
18	!------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! ------------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: lpm_exchange_horiz.f90 2245 2017-06-02 14:37:10Z sward $
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
33	!
34	! 2000 2016-08-20 18:09:15Z knoop
35	! Forced header and separation lines into 80 columns
36	!
37	! 1936 2016-06-13 13:37:44Z suehring
38	! Deallocation of unused memory
39	!
40	! 1929 2016-06-09 16:25:25Z suehring
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
50	!
51	! 1873 2016-04-18 14:50:06Z maronga
52	! Module renamed (removed _mod)
53	!
54	!
55	! 1850 2016-04-08 13:29:27Z maronga
56	! Module renamed
57	!
58	!
59	! 1822 2016-04-07 07:49:42Z hoffmann
60	! Tails removed. Unused variables removed.
61	!
62	! 1783 2016-03-06 18:36:17Z raasch
63	! new netcdf-module included
64	!
65	! 1691 2015-10-26 16:17:44Z maronga
66	! Formatting corrections.
67	!
68	! 1685 2015-10-08 07:32:13Z raasch
69	! bugfix concerning vertical index offset in case of ocean
70	!
71	! 1682 2015-10-07 23:56:08Z knoop
72	! Code annotations made doxygen readable
73	!
74	! 1359 2014-04-11 17:15:14Z hoffmann
75	! New particle structure integrated.
76	! Kind definition added to all floating point numbers.
77	!
78	! 1327 2014-03-21 11:00:16Z raasch
79	! -netcdf output queries
80	!
81	! 1320 2014-03-20 08:40:49Z raasch
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
87	!
88	! 1318 2014-03-17 13:35:16Z raasch
89	! module interfaces removed
90	!
91	! 1036 2012-10-22 13:43:42Z raasch
92	! code put under GPL (PALM 3.9)
93	!
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	!
98	! 849 2012-03-15 10:35:09Z raasch
99	! initial revision (former part of advec_particles)
100	!
101	!
102	! Description:
103	! ------------
104	! Exchange of particles between the subdomains.
105	!------------------------------------------------------------------------------!
106	MODULE lpm_exchange_horiz_mod
107
108
109	USE control_parameters, &
110	ONLY: dz, message_string, simulated_time
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, &
119	ONLY: nx, nxl, nxr, ny, nyn, nys, nzb, nzt
120
121	USE kinds
122
123	USE lpm_pack_arrays_mod, &
124	ONLY: lpm_pack_arrays
125
126	USE netcdf_interface, &
127	ONLY: netcdf_data_format
128
129	USE particle_attributes, &
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, &
135	trlp_count_recv_sum, trnp_count_sum, trnp_count_recv_sum, &
136	trrp_count_sum, trrp_count_recv_sum, trsp_count_sum, &
137	trsp_count_recv_sum, zero_particle
138
139	USE pegrid
140
141	IMPLICIT NONE
142
143	INTEGER(iwp), PARAMETER :: NR_2_direction_move = 10000 !<
144	INTEGER(iwp) :: nr_move_north !<
145	INTEGER(iwp) :: nr_move_south !<
146
147	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: move_also_north
148	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: move_also_south
149
150	SAVE
151
152	PRIVATE
153	PUBLIC lpm_exchange_horiz, lpm_move_particle, realloc_particles_array, &
154	dealloc_particles_array
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
168	INTERFACE dealloc_particles_array
169	MODULE PROCEDURE dealloc_particles_array
170	END INTERFACE dealloc_particles_array
171	CONTAINS
172
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	!------------------------------------------------------------------------------!
187	SUBROUTINE lpm_exchange_horiz
188
189	IMPLICIT NONE
190
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
205
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
214
215	CALL cpu_log( log_point_s(23), 'lpm_exchange_horiz', 'start' )
216
217	#if defined( __parallel )
218
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.
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	!
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
243
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
250	!
251	!-- Above calculation does not work for indices less than zero
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
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
271	trlp = zero_particle
272	trrp = zero_particle
273
274	trlp_count = 0
275	trrp_count = 0
276
277	ENDIF
278	!
279	!-- Compute only first (nxl) and last (nxr) loop iterration
280	DO ip = nxl, nxr, nxr-nxl
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
291
292	i = ( particles(n)%x + 0.5_wp * dx ) * ddx
293	!
294	!-- Above calculation does not work for indices less than zero
295	IF ( particles(n)%x < - 0.5_wp * dx ) i = -1
296
297	IF ( i < nxl ) THEN
298	IF ( i < 0 ) THEN
299	!
300	!-- Apply boundary condition along x
301	IF ( ibc_par_lr == 0 ) THEN
302	!
303	!-- Cyclic condition
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
316
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
322
323	ENDIF
324
325	ELSEIF ( ibc_par_lr == 1 ) THEN
326	!
327	!-- Particle absorption
328	particles(n)%particle_mask = .FALSE.
329	deleted_particles = deleted_particles + 1
330
331	ELSEIF ( ibc_par_lr == 2 ) THEN
332	!
333	!-- Particle reflection
334	particles(n)%x = -particles(n)%x
335	particles(n)%speed_x = -particles(n)%speed_x
336
337	ENDIF
338	ELSE
339	!
340	!-- Store particle data in the transfer array, which will be
341	!-- send to the neighbouring PE
342	trlp_count = trlp_count + 1
343	trlp(trlp_count) = particles(n)
344	particles(n)%particle_mask = .FALSE.
345	deleted_particles = deleted_particles + 1
346
347	ENDIF
348
349	ELSEIF ( i > nxr ) THEN
350	IF ( i > nx ) THEN
351	!
352	!-- Apply boundary condition along x
353	IF ( ibc_par_lr == 0 ) THEN
354	!
355	!-- Cyclic condition
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
368
369	ENDIF
370
371	ELSEIF ( ibc_par_lr == 1 ) THEN
372	!
373	!-- Particle absorption
374	particles(n)%particle_mask = .FALSE.
375	deleted_particles = deleted_particles + 1
376
377	ELSEIF ( ibc_par_lr == 2 ) THEN
378	!
379	!-- Particle reflection
380	particles(n)%x = 2 * ( nx * dx ) - particles(n)%x
381	particles(n)%speed_x = -particles(n)%speed_x
382
383	ENDIF
384	ELSE
385	!
386	!-- Store particle data in the transfer array, which will be send
387	!-- to the neighbouring PE
388	trrp_count = trrp_count + 1
389	trrp(trrp_count) = particles(n)
390	particles(n)%particle_mask = .FALSE.
391	deleted_particles = deleted_particles + 1
392
393	ENDIF
394
395	ENDIF
396	ENDIF
397
398	ENDDO
399	ENDDO
400	ENDDO
401	ENDDO
402
403	!
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	!
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
420	ALLOCATE(rvrp(MAX(1,trrp_count_recv)))
421
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,&
425	comm2d, status, ierr )
426
427	IF ( trrp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvrp(1:trrp_count_recv))
428
429	DEALLOCATE(rvrp)
430
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
437	ALLOCATE(rvlp(MAX(1,trlp_count_recv)))
438
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, &
442	comm2d, status, ierr )
443
444	IF ( trlp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvlp(1:trlp_count_recv))
445
446	DEALLOCATE( rvlp )
447	DEALLOCATE( trlp, trrp )
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.
457	!-- For a one-dimensional decomposition along y, no transfer is necessary,
458	!-- because the particle remains on the PE.
459	trsp_count = nr_move_south
460	trnp_count = nr_move_north
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
469	DO ip = nxl, nxr
470	DO jp = nys, nyn, nyn-nys !compute only first (nys) and last (nyn) loop iterration
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
478	!
479	!-- Above calculation does not work for indices less than zero
480	IF ( particles(n)%y < -0.5_wp * dy ) j = -1
481
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
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
498	trsp = zero_particle
499	trnp = zero_particle
500
501	trsp_count = nr_move_south
502	trnp_count = nr_move_north
503
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
507	ENDIF
508
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
516	!
517	!-- Only those particles that have not been marked as 'deleted' may
518	!-- be moved.
519	IF ( particles(n)%particle_mask ) THEN
520
521	j = ( particles(n)%y + 0.5_wp * dy ) * ddy
522	!
523	!-- Above calculation does not work for indices less than zero
524	IF ( particles(n)%y < -0.5_wp * dy ) j = -1
525
526	IF ( j < nys ) THEN
527	IF ( j < 0 ) THEN
528	!
529	!-- Apply boundary condition along y
530	IF ( ibc_par_ns == 0 ) THEN
531	!
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 + &
536	particles(n)%origin_y
537	ELSE
538	trsp_count = trsp_count + 1
539	trsp(trsp_count) = particles(n)
540	trsp(trsp_count)%y = ( ny + 1 ) * dy + &
541	trsp(trsp_count)%y
542	trsp(trsp_count)%origin_y = trsp(trsp_count)%origin_y &
543	+ ( ny + 1 ) * dy
544	particles(n)%particle_mask = .FALSE.
545	deleted_particles = deleted_particles + 1
546
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 = &
551	trsp(trsp_count)%origin_y - 1
552	ENDIF
553
554	ENDIF
555
556	ELSEIF ( ibc_par_ns == 1 ) THEN
557	!
558	!-- Particle absorption
559	particles(n)%particle_mask = .FALSE.
560	deleted_particles = deleted_particles + 1
561
562	ELSEIF ( ibc_par_ns == 2 ) THEN
563	!
564	!-- Particle reflection
565	particles(n)%y = -particles(n)%y
566	particles(n)%speed_y = -particles(n)%speed_y
567
568	ENDIF
569	ELSE
570	!
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
577
578	ENDIF
579
580	ELSEIF ( j > nyn ) THEN
581	IF ( j > ny ) THEN
582	!
583	!-- Apply boundary condition along y
584	IF ( ibc_par_ns == 0 ) THEN
585	!
586	!-- Cyclic condition
587	IF ( pdims(2) == 1 ) THEN
588	particles(n)%y = particles(n)%y - ( ny + 1 ) * dy
589	particles(n)%origin_y = &
590	particles(n)%origin_y - ( ny + 1 ) * dy
591	ELSE
592	trnp_count = trnp_count + 1
593	trnp(trnp_count) = particles(n)
594	trnp(trnp_count)%y = &
595	trnp(trnp_count)%y - ( ny + 1 ) * dy
596	trnp(trnp_count)%origin_y = &
597	trnp(trnp_count)%origin_y - ( ny + 1 ) * dy
598	particles(n)%particle_mask = .FALSE.
599	deleted_particles = deleted_particles + 1
600	ENDIF
601
602	ELSEIF ( ibc_par_ns == 1 ) THEN
603	!
604	!-- Particle absorption
605	particles(n)%particle_mask = .FALSE.
606	deleted_particles = deleted_particles + 1
607
608	ELSEIF ( ibc_par_ns == 2 ) THEN
609	!
610	!-- Particle reflection
611	particles(n)%y = 2 * ( ny * dy ) - particles(n)%y
612	particles(n)%speed_y = -particles(n)%speed_y
613
614	ENDIF
615	ELSE
616	!
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
623
624	ENDIF
625
626	ENDIF
627	ENDIF
628	ENDDO
629	ENDDO
630	ENDDO
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
642	ALLOCATE(rvnp(MAX(1,trnp_count_recv)))
643
644	CALL MPI_SENDRECV( trsp(1)%radius, trsp_count, mpi_particle_type, &
645	psouth, 1, rvnp(1)%radius, &
646	trnp_count_recv, mpi_particle_type, pnorth, 1, &
647	comm2d, status, ierr )
648
649	IF ( trnp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvnp(1:trnp_count_recv))
650
651	DEALLOCATE(rvnp)
652
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
659	ALLOCATE(rvsp(MAX(1,trsp_count_recv)))
660
661	CALL MPI_SENDRECV( trnp(1)%radius, trnp_count, mpi_particle_type, &
662	pnorth, 1, rvsp(1)%radius, &
663	trsp_count_recv, mpi_particle_type, psouth, 1, &
664	comm2d, status, ierr )
665
666	IF ( trsp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvsp(1:trsp_count_recv))
667
668	DEALLOCATE(rvsp)
669
670	number_of_particles = number_of_particles + trsp_count_recv
671
672	DEALLOCATE( trsp, trnp )
673
674	ENDIF
675
676	DEALLOCATE( move_also_north )
677	DEALLOCATE( move_also_south )
678
679	#else
680
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
688	!
689	!-- Apply boundary conditions
690
691	IF ( particles(n)%x < -0.5_wp * dx ) THEN
692
693	IF ( ibc_par_lr == 0 ) THEN
694	!
695	!-- Cyclic boundary. Relevant coordinate has to be changed.
696	particles(n)%x = ( nx + 1 ) * dx + particles(n)%x
697
698	ELSEIF ( ibc_par_lr == 1 ) THEN
699	!
700	!-- Particle absorption
701	particles(n)%particle_mask = .FALSE.
702	deleted_particles = deleted_particles + 1
703
704	ELSEIF ( ibc_par_lr == 2 ) THEN
705	!
706	!-- Particle reflection
707	particles(n)%x = -dx - particles(n)%x
708	particles(n)%speed_x = -particles(n)%speed_x
709	ENDIF
710
711	ELSEIF ( particles(n)%x >= ( nx + 0.5_wp ) * dx ) THEN
712
713	IF ( ibc_par_lr == 0 ) THEN
714	!
715	!-- Cyclic boundary. Relevant coordinate has to be changed.
716	particles(n)%x = particles(n)%x - ( nx + 1 ) * dx
717
718	ELSEIF ( ibc_par_lr == 1 ) THEN
719	!
720	!-- Particle absorption
721	particles(n)%particle_mask = .FALSE.
722	deleted_particles = deleted_particles + 1
723
724	ELSEIF ( ibc_par_lr == 2 ) THEN
725	!
726	!-- Particle reflection
727	particles(n)%x = ( nx + 1 ) * dx - particles(n)%x
728	particles(n)%speed_x = -particles(n)%speed_x
729	ENDIF
730
731	ENDIF
732	ENDDO
733	ENDDO
734	ENDDO
735	ENDDO
736
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
744
745	IF ( particles(n)%y < -0.5_wp * dy ) THEN
746
747	IF ( ibc_par_ns == 0 ) THEN
748	!
749	!-- Cyclic boundary. Relevant coordinate has to be changed.
750	particles(n)%y = ( ny + 1 ) * dy + particles(n)%y
751
752	ELSEIF ( ibc_par_ns == 1 ) THEN
753	!
754	!-- Particle absorption
755	particles(n)%particle_mask = .FALSE.
756	deleted_particles = deleted_particles + 1
757
758	ELSEIF ( ibc_par_ns == 2 ) THEN
759	!
760	!-- Particle reflection
761	particles(n)%y = -dy - particles(n)%y
762	particles(n)%speed_y = -particles(n)%speed_y
763	ENDIF
764
765	ELSEIF ( particles(n)%y >= ( ny + 0.5_wp ) * dy ) THEN
766
767	IF ( ibc_par_ns == 0 ) THEN
768	!
769	!-- Cyclic boundary. Relevant coordinate has to be changed.
770	particles(n)%y = particles(n)%y - ( ny + 1 ) * dy
771
772	ELSEIF ( ibc_par_ns == 1 ) THEN
773	!
774	!-- Particle absorption
775	particles(n)%particle_mask = .FALSE.
776	deleted_particles = deleted_particles + 1
777
778	ELSEIF ( ibc_par_ns == 2 ) THEN
779	!
780	!-- Particle reflection
781	particles(n)%y = ( ny + 1 ) * dy - particles(n)%y
782	particles(n)%speed_y = -particles(n)%speed_y
783	ENDIF
784
785	ENDIF
786
787	ENDDO
788	ENDDO
789	ENDDO
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
806	CALL cpu_log( log_point_s(23), 'lpm_exchange_horiz', 'stop' )
807
808	END SUBROUTINE lpm_exchange_horiz
809
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	!------------------------------------------------------------------------------!
817	SUBROUTINE Add_particles_to_gridcell (particle_array)
818
819	IMPLICIT NONE
820
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
826
827	LOGICAL :: pack_done !<
828
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
831
832	pack_done = .FALSE.
833
834	DO n = 1, SIZE(particle_array)
835
836	IF ( .NOT. particle_array(n)%particle_mask ) CYCLE
837
838	ip = ( particle_array(n)%x + 0.5_wp * dx ) * ddx
839	jp = ( particle_array(n)%y + 0.5_wp * dy ) * ddy
840	kp = particle_array(n)%z / dz + 1 + offset_ocean_nzt
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
864	IF ( jp <= nys - 1 ) THEN
865	nr_move_south = nr_move_south+1
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
883	move_also_south(nr_move_south) = particle_array(n)
884
885	IF ( jp == -1 ) THEN
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
908	ENDIF
909	ELSEIF ( jp >= nyn+1 ) THEN
910	nr_move_north = nr_move_north+1
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
928	move_also_north(nr_move_north) = particle_array(n)
929	IF ( jp == ny+1 ) THEN
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
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
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	!------------------------------------------------------------------------------!
975	SUBROUTINE lpm_move_particle
976
977	IMPLICIT NONE
978
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
989
990	LOGICAL :: pack_done !<
991
992	TYPE(particle_type), DIMENSION(:), POINTER :: particles_old_cell !< particles before moving
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
1038	IF ( n_start >= 0 ) THEN
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	!
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	!
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
1096	!------------------------------------------------------------------------------!
1097	! Description:
1098	! ------------
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.
1102	!------------------------------------------------------------------------------!
1103	SUBROUTINE realloc_particles_array (i,j,k,size_in)
1104
1105	IMPLICIT NONE
1106
1107	INTEGER(iwp), INTENT(in) :: i !<
1108	INTEGER(iwp), INTENT(in) :: j !<
1109	INTEGER(iwp), INTENT(in) :: k !<
1110	INTEGER(iwp), INTENT(in), OPTIONAL :: size_in !<
1111
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 !<
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
1122	new_size = old_size * ( 1.0_wp + alloc_factor / 100.0_wp )
1123	ENDIF
1124
1125	new_size = MAX( new_size, min_nr_particle, old_size + 1 )
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
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
1233	END MODULE lpm_exchange_horiz_mod

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