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source: palm/trunk/SOURCE/lpm_exchange_horiz.f90 @ 3997

Last change on this file since 3997 was 3655, checked in by knoop, 6 years ago
Bugfix: made "unit" and "found" intend INOUT in module interface subroutines + automatic copyright update
Property svn:keywords set to `Id`
File size: 51.4 KB

Rev	Line
[1873]	1	!> @file lpm_exchange_horiz.f90
[2000]	2	!------------------------------------------------------------------------------!
[2696]	3	! This file is part of the PALM model system.
[1036]	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	!
[3655]	17	! Copyright 1997-2019 Leibniz Universitaet Hannover
[2000]	18	!------------------------------------------------------------------------------!
[1036]	19	!
[849]	20	! Current revisions:
	21	! ------------------
[1930]	22	!
[3049]	23	!
[1930]	24	! Former revisions:
	25	! -----------------
	26	! $Id: lpm_exchange_horiz.f90 3655 2019-01-07 16:51:22Z eckhard $
[3065]	27	! dz was replaced by dz(1) to allow for right vertical stretching
	28	!
	29	! 3049 2018-05-29 13:52:36Z Giersch
[3049]	30	! Error messages revised
	31	!
	32	! 3046 2018-05-29 08:02:15Z Giersch
[2809]	33	! Bugfix for gfortran: Replace the function C_SIZEOF with STORAGE_SIZE.
	34	! Preprocessor directive(__gfortran) for c_sizeof removed.
	35	!
	36	! 2801 2018-02-14 16:01:55Z thiele
[2801]	37	! Introduce particle transfer in nested models.
	38	!
	39	! 2718 2018-01-02 08:49:38Z maronga
[2716]	40	! Corrected "Former revisions" section
	41	!
	42	! 2710 2017-12-19 12:50:11Z suehring
	43	! Changes from last commit documented
	44	!
	45	! 2709 2017-12-19 12:49:40Z suehring
[2710]	46	! Bugfix in CFL check.
	47	! Further bugfix, non-allocated array used in case of 1D decomposition.
[2716]	48	!
	49	! 2696 2017-12-14 17:12:51Z kanani
	50	! Change in file header (GPL part)
	51	!
	52	! 2632 2017-11-20 15:35:52Z schwenkel
[2632]	53	! Bugfix in write statement
[2716]	54	!
[2632]	55	! 2630 2017-11-20 12:58:20Z schwenkel
[2628]	56	! Enabled particle advection with grid stretching. Furthermore, the CFL-
	57	! criterion is checked for every particle at every time step.
	58	!
	59	! 2606 2017-11-10 10:36:31Z schwenkel
[2606]	60	! Changed particle box locations: center of particle box now coincides
	61	! with scalar grid point of same index.
	62	! lpm_move_particle now moves inner particles that would leave the core
	63	! to the respective boundary gridbox. Afterwards they get transferred by
	64	! lpm_exchange_horiz. This allows particles to move more than one gridbox
	65	! independent of domain composition.
	66	! Renamed module and subroutines: lpm_pack_arrays_mod -> lpm_pack_and_sort_mod
	67	! lpm_pack_all_arrays -> lpm_sort_in_subboxes, lpm_pack_arrays -> lpm_pack
	68	! lpm_sort -> lpm_sort_timeloop_done
	69	!
	70	! 2330 2017-08-03 14:26:02Z schwenkel
[2330]	71	! Bugfix: Also for gfortran compilable, function c_sizeof is not used.
	72	!
	73	! 2305 2017-07-06 11:18:47Z hoffmann
[2305]	74	! Improved calculation of particle IDs.
	75	!
	76	! 2245 2017-06-02 14:37:10Z schwenkel
[2245]	77	! Bugfix in Add_particles_to_gridcell:
	78	! Apply boundary conditions also in y-direction
	79	!
	80	! 2151 2017-02-15 10:42:16Z schwenkel
	81	! Bugfix in lpm_move_particle that prevents
	82	! false production of additional particles
[1930]	83	!
[2001]	84	! 2000 2016-08-20 18:09:15Z knoop
	85	! Forced header and separation lines into 80 columns
	86	!
[1937]	87	! 1936 2016-06-13 13:37:44Z suehring
	88	! Deallocation of unused memory
	89	!
[1930]	90	! 1929 2016-06-09 16:25:25Z suehring
[1929]	91	! Bugfixes:
	92	! - reallocation of new particles
	93	! ( did not work for small number of min_nr_particle )
	94	! - dynamical reallocation of north-south exchange arrays ( particles got lost )
	95	! - north-south exchange ( nr_move_north, nr_move_south were overwritten by zero )
	96	! - horizontal particle boundary conditions in serial mode
	97	!
	98	! Remove unused variables
	99	! Descriptions in variable declaration blocks added
[1321]	100	!
[1874]	101	! 1873 2016-04-18 14:50:06Z maronga
	102	! Module renamed (removed _mod)
	103	!
	104	!
[1851]	105	! 1850 2016-04-08 13:29:27Z maronga
	106	! Module renamed
	107	!
	108	!
[1823]	109	! 1822 2016-04-07 07:49:42Z hoffmann
	110	! Tails removed. Unused variables removed.
	111	!
[1784]	112	! 1783 2016-03-06 18:36:17Z raasch
	113	! new netcdf-module included
	114	!
[1692]	115	! 1691 2015-10-26 16:17:44Z maronga
	116	! Formatting corrections.
	117	!
[1686]	118	! 1685 2015-10-08 07:32:13Z raasch
	119	! bugfix concerning vertical index offset in case of ocean
	120	!
[1683]	121	! 1682 2015-10-07 23:56:08Z knoop
	122	! Code annotations made doxygen readable
	123	!
[1360]	124	! 1359 2014-04-11 17:15:14Z hoffmann
	125	! New particle structure integrated.
	126	! Kind definition added to all floating point numbers.
	127	!
[1329]	128	! 1327 2014-03-21 11:00:16Z raasch
	129	! -netcdf output queries
	130	!
[1321]	131	! 1320 2014-03-20 08:40:49Z raasch
[1320]	132	! ONLY-attribute added to USE-statements,
	133	! kind-parameters added to all INTEGER and REAL declaration statements,
	134	! kinds are defined in new module kinds,
	135	! comment fields (!:) to be used for variable explanations added to
	136	! all variable declaration statements
[849]	137	!
[1319]	138	! 1318 2014-03-17 13:35:16Z raasch
	139	! module interfaces removed
	140	!
[1037]	141	! 1036 2012-10-22 13:43:42Z raasch
	142	! code put under GPL (PALM 3.9)
	143	!
[852]	144	! 851 2012-03-15 14:32:58Z raasch
	145	! Bugfix: resetting of particle_mask and tail mask moved from end of this
	146	! routine to lpm
	147	!
[850]	148	! 849 2012-03-15 10:35:09Z raasch
	149	! initial revision (former part of advec_particles)
[849]	150	!
[850]	151	!
[849]	152	! Description:
	153	! ------------
[3542]	154	!> Exchange of particles between the subdomains.
[849]	155	!------------------------------------------------------------------------------!
[1682]	156	MODULE lpm_exchange_horiz_mod
	157
[2305]	158	USE, INTRINSIC :: ISO_C_BINDING
[2628]	159
	160	USE arrays_3d, &
	161	ONLY: zw
	162
[1320]	163	USE control_parameters, &
[1783]	164	ONLY: dz, message_string, simulated_time
[1320]	165
	166	USE cpulog, &
	167	ONLY: cpu_log, log_point_s
	168
	169	USE grid_variables, &
	170	ONLY: ddx, ddy, dx, dy
	171
	172	USE indices, &
[1359]	173	ONLY: nx, nxl, nxr, ny, nyn, nys, nzb, nzt
[1320]	174
	175	USE kinds
	176
[2606]	177	USE lpm_pack_and_sort_mod, &
	178	ONLY: lpm_pack
[1359]	179
[1783]	180	USE netcdf_interface, &
	181	ONLY: netcdf_data_format
	182
[1320]	183	USE particle_attributes, &
[1822]	184	ONLY: alloc_factor, deleted_particles, grid_particles, &
	185	ibc_par_lr, ibc_par_ns, min_nr_particle, &
[2305]	186	number_of_particles, &
[1822]	187	offset_ocean_nzt, offset_ocean_nzt_m1, particles, &
	188	particle_type, prt_count, trlp_count_sum, &
[1359]	189	trlp_count_recv_sum, trnp_count_sum, trnp_count_recv_sum, &
	190	trrp_count_sum, trrp_count_recv_sum, trsp_count_sum, &
[1822]	191	trsp_count_recv_sum, zero_particle
[1320]	192
[849]	193	USE pegrid
	194
	195	IMPLICIT NONE
	196
[1682]	197	INTEGER(iwp), PARAMETER :: NR_2_direction_move = 10000 !<
	198	INTEGER(iwp) :: nr_move_north !<
	199	INTEGER(iwp) :: nr_move_south !<
[1359]	200
[1929]	201	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: move_also_north
	202	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: move_also_south
[1359]	203
	204	SAVE
	205
	206	PRIVATE
[1936]	207	PUBLIC lpm_exchange_horiz, lpm_move_particle, realloc_particles_array, &
	208	dealloc_particles_array
[1359]	209
	210	INTERFACE lpm_exchange_horiz
	211	MODULE PROCEDURE lpm_exchange_horiz
	212	END INTERFACE lpm_exchange_horiz
	213
	214	INTERFACE lpm_move_particle
	215	MODULE PROCEDURE lpm_move_particle
	216	END INTERFACE lpm_move_particle
	217
	218	INTERFACE realloc_particles_array
	219	MODULE PROCEDURE realloc_particles_array
	220	END INTERFACE realloc_particles_array
	221
[1936]	222	INTERFACE dealloc_particles_array
	223	MODULE PROCEDURE dealloc_particles_array
	224	END INTERFACE dealloc_particles_array
[1359]	225	CONTAINS
	226
[1682]	227	!------------------------------------------------------------------------------!
	228	! Description:
	229	! ------------
	230	!> Exchange between subdomains.
	231	!> As soon as one particle has moved beyond the boundary of the domain, it
	232	!> is included in the relevant transfer arrays and marked for subsequent
	233	!> deletion on this PE.
	234	!> First sweep for crossings in x direction. Find out first the number of
	235	!> particles to be transferred and allocate temporary arrays needed to store
	236	!> them.
	237	!> For a one-dimensional decomposition along y, no transfer is necessary,
	238	!> because the particle remains on the PE, but the particle coordinate has to
	239	!> be adjusted.
	240	!------------------------------------------------------------------------------!
[1359]	241	SUBROUTINE lpm_exchange_horiz
	242
	243	IMPLICIT NONE
	244
[1929]	245	INTEGER(iwp) :: i !< grid index (x) of particle positition
	246	INTEGER(iwp) :: ip !< index variable along x
	247	INTEGER(iwp) :: j !< grid index (y) of particle positition
	248	INTEGER(iwp) :: jp !< index variable along y
	249	INTEGER(iwp) :: kp !< index variable along z
	250	INTEGER(iwp) :: n !< particle index variable
[2305]	251	INTEGER(iwp) :: par_size !< Particle size in bytes
[1929]	252	INTEGER(iwp) :: trlp_count !< number of particles send to left PE
	253	INTEGER(iwp) :: trlp_count_recv !< number of particles receive from right PE
	254	INTEGER(iwp) :: trnp_count !< number of particles send to north PE
	255	INTEGER(iwp) :: trnp_count_recv !< number of particles receive from south PE
	256	INTEGER(iwp) :: trrp_count !< number of particles send to right PE
	257	INTEGER(iwp) :: trrp_count_recv !< number of particles receive from left PE
	258	INTEGER(iwp) :: trsp_count !< number of particles send to south PE
	259	INTEGER(iwp) :: trsp_count_recv !< number of particles receive from north PE
[849]	260
[1929]	261	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: rvlp !< particles received from right PE
	262	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: rvnp !< particles received from south PE
	263	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: rvrp !< particles received from left PE
	264	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: rvsp !< particles received from north PE
	265	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: trlp !< particles send to left PE
	266	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: trnp !< particles send to north PE
	267	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: trrp !< particles send to right PE
	268	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: trsp !< particles send to south PE
[849]	269
[1359]	270	CALL cpu_log( log_point_s(23), 'lpm_exchange_horiz', 'start' )
	271
[849]	272	#if defined( __parallel )
	273
[1822]	274	!
	275	!-- Exchange between subdomains.
	276	!-- As soon as one particle has moved beyond the boundary of the domain, it
	277	!-- is included in the relevant transfer arrays and marked for subsequent
	278	!-- deletion on this PE.
	279	!-- First sweep for crossings in x direction. Find out first the number of
	280	!-- particles to be transferred and allocate temporary arrays needed to store
	281	!-- them.
	282	!-- For a one-dimensional decomposition along y, no transfer is necessary,
	283	!-- because the particle remains on the PE, but the particle coordinate has to
	284	!-- be adjusted.
[849]	285	trlp_count = 0
	286	trrp_count = 0
	287
	288	trlp_count_recv = 0
	289	trrp_count_recv = 0
	290
	291	IF ( pdims(1) /= 1 ) THEN
	292	!
[1359]	293	!-- First calculate the storage necessary for sending and receiving the data.
	294	!-- Compute only first (nxl) and last (nxr) loop iterration.
	295	DO ip = nxl, nxr, nxr - nxl
	296	DO jp = nys, nyn
	297	DO kp = nzb+1, nzt
[849]	298
[1359]	299	number_of_particles = prt_count(kp,jp,ip)
	300	IF ( number_of_particles <= 0 ) CYCLE
	301	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	302	DO n = 1, number_of_particles
	303	IF ( particles(n)%particle_mask ) THEN
[2606]	304	i = particles(n)%x * ddx
[1929]	305	!
	306	!-- Above calculation does not work for indices less than zero
[2606]	307	IF ( particles(n)%x < 0.0_wp) i = -1
[1359]	308
	309	IF ( i < nxl ) THEN
	310	trlp_count = trlp_count + 1
	311	ELSEIF ( i > nxr ) THEN
	312	trrp_count = trrp_count + 1
	313	ENDIF
	314	ENDIF
	315	ENDDO
	316
	317	ENDDO
	318	ENDDO
[849]	319	ENDDO
	320
	321	IF ( trlp_count == 0 ) trlp_count = 1
	322	IF ( trrp_count == 0 ) trrp_count = 1
	323
	324	ALLOCATE( trlp(trlp_count), trrp(trrp_count) )
	325
[1359]	326	trlp = zero_particle
	327	trrp = zero_particle
[849]	328
	329	trlp_count = 0
	330	trrp_count = 0
	331
	332	ENDIF
[1359]	333	!
	334	!-- Compute only first (nxl) and last (nxr) loop iterration
[1929]	335	DO ip = nxl, nxr, nxr-nxl
[1359]	336	DO jp = nys, nyn
	337	DO kp = nzb+1, nzt
	338	number_of_particles = prt_count(kp,jp,ip)
	339	IF ( number_of_particles <= 0 ) CYCLE
	340	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	341	DO n = 1, number_of_particles
	342	!
	343	!-- Only those particles that have not been marked as 'deleted' may
	344	!-- be moved.
	345	IF ( particles(n)%particle_mask ) THEN
[849]	346
[2606]	347	i = particles(n)%x * ddx
[1929]	348	!
	349	!-- Above calculation does not work for indices less than zero
[2606]	350	IF ( particles(n)%x < 0.0_wp ) i = -1
[849]	351
[1359]	352	IF ( i < nxl ) THEN
	353	IF ( i < 0 ) THEN
[1929]	354	!
	355	!-- Apply boundary condition along x
[1359]	356	IF ( ibc_par_lr == 0 ) THEN
[1929]	357	!
	358	!-- Cyclic condition
[1359]	359	IF ( pdims(1) == 1 ) THEN
	360	particles(n)%x = ( nx + 1 ) * dx + particles(n)%x
	361	particles(n)%origin_x = ( nx + 1 ) * dx + &
	362	particles(n)%origin_x
	363	ELSE
	364	trlp_count = trlp_count + 1
	365	trlp(trlp_count) = particles(n)
	366	trlp(trlp_count)%x = ( nx + 1 ) * dx + trlp(trlp_count)%x
	367	trlp(trlp_count)%origin_x = trlp(trlp_count)%origin_x + &
	368	( nx + 1 ) * dx
	369	particles(n)%particle_mask = .FALSE.
	370	deleted_particles = deleted_particles + 1
[849]	371
[2606]	372	IF ( trlp(trlp_count)%x >= (nx + 1)* dx - 1.0E-12_wp ) THEN
[1359]	373	trlp(trlp_count)%x = trlp(trlp_count)%x - 1.0E-10_wp
	374	!++ why is 1 subtracted in next statement???
	375	trlp(trlp_count)%origin_x = trlp(trlp_count)%origin_x - 1
	376	ENDIF
[849]	377
[1359]	378	ENDIF
[849]	379
[1359]	380	ELSEIF ( ibc_par_lr == 1 ) THEN
[1929]	381	!
	382	!-- Particle absorption
[1359]	383	particles(n)%particle_mask = .FALSE.
	384	deleted_particles = deleted_particles + 1
[849]	385
[1359]	386	ELSEIF ( ibc_par_lr == 2 ) THEN
[1929]	387	!
	388	!-- Particle reflection
[1359]	389	particles(n)%x = -particles(n)%x
	390	particles(n)%speed_x = -particles(n)%speed_x
[849]	391
[1359]	392	ENDIF
	393	ELSE
[1929]	394	!
	395	!-- Store particle data in the transfer array, which will be
	396	!-- send to the neighbouring PE
[1359]	397	trlp_count = trlp_count + 1
	398	trlp(trlp_count) = particles(n)
	399	particles(n)%particle_mask = .FALSE.
	400	deleted_particles = deleted_particles + 1
[849]	401
[1359]	402	ENDIF
[849]	403
[1359]	404	ELSEIF ( i > nxr ) THEN
	405	IF ( i > nx ) THEN
[1929]	406	!
	407	!-- Apply boundary condition along x
[1359]	408	IF ( ibc_par_lr == 0 ) THEN
[1929]	409	!
	410	!-- Cyclic condition
[1359]	411	IF ( pdims(1) == 1 ) THEN
	412	particles(n)%x = particles(n)%x - ( nx + 1 ) * dx
	413	particles(n)%origin_x = particles(n)%origin_x - &
	414	( nx + 1 ) * dx
	415	ELSE
	416	trrp_count = trrp_count + 1
	417	trrp(trrp_count) = particles(n)
	418	trrp(trrp_count)%x = trrp(trrp_count)%x - ( nx + 1 ) * dx
	419	trrp(trrp_count)%origin_x = trrp(trrp_count)%origin_x - &
	420	( nx + 1 ) * dx
	421	particles(n)%particle_mask = .FALSE.
	422	deleted_particles = deleted_particles + 1
[849]	423
[1359]	424	ENDIF
[849]	425
[1359]	426	ELSEIF ( ibc_par_lr == 1 ) THEN
[1929]	427	!
	428	!-- Particle absorption
[1359]	429	particles(n)%particle_mask = .FALSE.
	430	deleted_particles = deleted_particles + 1
[849]	431
[1359]	432	ELSEIF ( ibc_par_lr == 2 ) THEN
[1929]	433	!
	434	!-- Particle reflection
[1359]	435	particles(n)%x = 2 * ( nx * dx ) - particles(n)%x
	436	particles(n)%speed_x = -particles(n)%speed_x
[849]	437
[1359]	438	ENDIF
	439	ELSE
[1929]	440	!
	441	!-- Store particle data in the transfer array, which will be send
	442	!-- to the neighbouring PE
[1359]	443	trrp_count = trrp_count + 1
	444	trrp(trrp_count) = particles(n)
	445	particles(n)%particle_mask = .FALSE.
	446	deleted_particles = deleted_particles + 1
[849]	447
[1359]	448	ENDIF
[849]	449
[1359]	450	ENDIF
	451	ENDIF
[1929]	452
[1359]	453	ENDDO
	454	ENDDO
	455	ENDDO
[849]	456	ENDDO
	457
	458	!
[2809]	459	!-- STORAGE_SIZE returns the storage size of argument A in bits. However , it
	460	!-- is needed in bytes. The function C_SIZEOF which produces this value directly
	461	!-- causes problems with gfortran. For this reason the use of C_SIZEOF is avoided
	462	par_size = STORAGE_SIZE(trlp(1))/8
[2709]	463
[2330]	464
	465	!
[1929]	466	!-- Allocate arrays required for north-south exchange, as these
	467	!-- are used directly after particles are exchange along x-direction.
	468	ALLOCATE( move_also_north(1:NR_2_direction_move) )
	469	ALLOCATE( move_also_south(1:NR_2_direction_move) )
	470
	471	nr_move_north = 0
	472	nr_move_south = 0
	473	!
[849]	474	!-- Send left boundary, receive right boundary (but first exchange how many
	475	!-- and check, if particle storage must be extended)
	476	IF ( pdims(1) /= 1 ) THEN
	477
	478	CALL MPI_SENDRECV( trlp_count, 1, MPI_INTEGER, pleft, 0, &
	479	trrp_count_recv, 1, MPI_INTEGER, pright, 0, &
	480	comm2d, status, ierr )
	481
[1359]	482	ALLOCATE(rvrp(MAX(1,trrp_count_recv)))
[2330]	483
[2305]	484	CALL MPI_SENDRECV( trlp, max(1,trlp_count)*par_size, MPI_BYTE,&
	485	pleft, 1, rvrp, &
	486	max(1,trrp_count_recv)*par_size, MPI_BYTE, pright, 1,&
[849]	487	comm2d, status, ierr )
	488
[1359]	489	IF ( trrp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvrp(1:trrp_count_recv))
	490
	491	DEALLOCATE(rvrp)
	492
[849]	493	!
	494	!-- Send right boundary, receive left boundary
	495	CALL MPI_SENDRECV( trrp_count, 1, MPI_INTEGER, pright, 0, &
	496	trlp_count_recv, 1, MPI_INTEGER, pleft, 0, &
	497	comm2d, status, ierr )
	498
[1359]	499	ALLOCATE(rvlp(MAX(1,trlp_count_recv)))
[2305]	500	!
	501	!-- This MPI_SENDRECV should work even with odd mixture on 32 and 64 Bit
	502	!-- variables in structure particle_type (due to the calculation of par_size)
	503	CALL MPI_SENDRECV( trrp, max(1,trrp_count)*par_size, MPI_BYTE,&
	504	pright, 1, rvlp, &
	505	max(1,trlp_count_recv)*par_size, MPI_BYTE, pleft, 1, &
[849]	506	comm2d, status, ierr )
	507
[1359]	508	IF ( trlp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvlp(1:trlp_count_recv))
	509
[1822]	510	DEALLOCATE( rvlp )
[1359]	511	DEALLOCATE( trlp, trrp )
[849]	512
	513	ENDIF
	514
	515	!
	516	!-- Check whether particles have crossed the boundaries in y direction. Note
	517	!-- that this case can also apply to particles that have just been received
	518	!-- from the adjacent right or left PE.
	519	!-- Find out first the number of particles to be transferred and allocate
	520	!-- temporary arrays needed to store them.
[1929]	521	!-- For a one-dimensional decomposition along y, no transfer is necessary,
[849]	522	!-- because the particle remains on the PE.
[1359]	523	trsp_count = nr_move_south
	524	trnp_count = nr_move_north
[849]	525
	526	trsp_count_recv = 0
	527	trnp_count_recv = 0
	528
	529	IF ( pdims(2) /= 1 ) THEN
	530	!
	531	!-- First calculate the storage necessary for sending and receiving the
	532	!-- data
[1359]	533	DO ip = nxl, nxr
[1929]	534	DO jp = nys, nyn, nyn-nys !compute only first (nys) and last (nyn) loop iterration
[1359]	535	DO kp = nzb+1, nzt
	536	number_of_particles = prt_count(kp,jp,ip)
	537	IF ( number_of_particles <= 0 ) CYCLE
	538	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	539	DO n = 1, number_of_particles
	540	IF ( particles(n)%particle_mask ) THEN
[2606]	541	j = particles(n)%y * ddy
[849]	542	!
[1359]	543	!-- Above calculation does not work for indices less than zero
[2606]	544	IF ( particles(n)%y < 0.0_wp) j = -1
[849]	545
[1359]	546	IF ( j < nys ) THEN
	547	trsp_count = trsp_count + 1
	548	ELSEIF ( j > nyn ) THEN
	549	trnp_count = trnp_count + 1
	550	ENDIF
	551	ENDIF
	552	ENDDO
	553	ENDDO
	554	ENDDO
[849]	555	ENDDO
	556
	557	IF ( trsp_count == 0 ) trsp_count = 1
	558	IF ( trnp_count == 0 ) trnp_count = 1
	559
	560	ALLOCATE( trsp(trsp_count), trnp(trnp_count) )
	561
[1359]	562	trsp = zero_particle
	563	trnp = zero_particle
[849]	564
[1359]	565	trsp_count = nr_move_south
	566	trnp_count = nr_move_north
[1929]	567
[1359]	568	trsp(1:nr_move_south) = move_also_south(1:nr_move_south)
	569	trnp(1:nr_move_north) = move_also_north(1:nr_move_north)
	570
[849]	571	ENDIF
	572
[1359]	573	DO ip = nxl, nxr
	574	DO jp = nys, nyn, nyn-nys ! compute only first (nys) and last (nyn) loop iterration
	575	DO kp = nzb+1, nzt
	576	number_of_particles = prt_count(kp,jp,ip)
	577	IF ( number_of_particles <= 0 ) CYCLE
	578	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	579	DO n = 1, number_of_particles
[849]	580	!
[1359]	581	!-- Only those particles that have not been marked as 'deleted' may
	582	!-- be moved.
	583	IF ( particles(n)%particle_mask ) THEN
[1929]	584
[2606]	585	j = particles(n)%y * ddy
[849]	586	!
[1359]	587	!-- Above calculation does not work for indices less than zero
[2606]	588	IF ( particles(n)%y < 0.0_wp ) j = -1
[849]	589
[1359]	590	IF ( j < nys ) THEN
	591	IF ( j < 0 ) THEN
[849]	592	!
[1359]	593	!-- Apply boundary condition along y
	594	IF ( ibc_par_ns == 0 ) THEN
[849]	595	!
[1359]	596	!-- Cyclic condition
	597	IF ( pdims(2) == 1 ) THEN
	598	particles(n)%y = ( ny + 1 ) * dy + particles(n)%y
	599	particles(n)%origin_y = ( ny + 1 ) * dy + &
[1929]	600	particles(n)%origin_y
[1359]	601	ELSE
[1929]	602	trsp_count = trsp_count + 1
	603	trsp(trsp_count) = particles(n)
[1359]	604	trsp(trsp_count)%y = ( ny + 1 ) * dy + &
[1929]	605	trsp(trsp_count)%y
[1359]	606	trsp(trsp_count)%origin_y = trsp(trsp_count)%origin_y &
[1929]	607	+ ( ny + 1 ) * dy
[1359]	608	particles(n)%particle_mask = .FALSE.
	609	deleted_particles = deleted_particles + 1
[849]	610
[2606]	611	IF ( trsp(trsp_count)%y >= (ny+1)* dy - 1.0E-12_wp ) THEN
[1359]	612	trsp(trsp_count)%y = trsp(trsp_count)%y - 1.0E-10_wp
	613	!++ why is 1 subtracted in next statement???
	614	trsp(trsp_count)%origin_y = &
[1929]	615	trsp(trsp_count)%origin_y - 1
[1359]	616	ENDIF
[849]	617
[1359]	618	ENDIF
[849]	619
[1359]	620	ELSEIF ( ibc_par_ns == 1 ) THEN
[849]	621	!
[1359]	622	!-- Particle absorption
	623	particles(n)%particle_mask = .FALSE.
[1929]	624	deleted_particles = deleted_particles + 1
[849]	625
[1359]	626	ELSEIF ( ibc_par_ns == 2 ) THEN
[849]	627	!
[1359]	628	!-- Particle reflection
	629	particles(n)%y = -particles(n)%y
	630	particles(n)%speed_y = -particles(n)%speed_y
[849]	631
[1359]	632	ENDIF
	633	ELSE
[849]	634	!
[1359]	635	!-- Store particle data in the transfer array, which will
	636	!-- be send to the neighbouring PE
	637	trsp_count = trsp_count + 1
	638	trsp(trsp_count) = particles(n)
	639	particles(n)%particle_mask = .FALSE.
	640	deleted_particles = deleted_particles + 1
[849]	641
[1359]	642	ENDIF
[849]	643
[1359]	644	ELSEIF ( j > nyn ) THEN
	645	IF ( j > ny ) THEN
[849]	646	!
[1929]	647	!-- Apply boundary condition along y
[1359]	648	IF ( ibc_par_ns == 0 ) THEN
[849]	649	!
[1359]	650	!-- Cyclic condition
	651	IF ( pdims(2) == 1 ) THEN
[1929]	652	particles(n)%y = particles(n)%y - ( ny + 1 ) * dy
[1359]	653	particles(n)%origin_y = &
[1929]	654	particles(n)%origin_y - ( ny + 1 ) * dy
[1359]	655	ELSE
[1929]	656	trnp_count = trnp_count + 1
	657	trnp(trnp_count) = particles(n)
[1359]	658	trnp(trnp_count)%y = &
[1929]	659	trnp(trnp_count)%y - ( ny + 1 ) * dy
[1359]	660	trnp(trnp_count)%origin_y = &
[1929]	661	trnp(trnp_count)%origin_y - ( ny + 1 ) * dy
[1359]	662	particles(n)%particle_mask = .FALSE.
[1929]	663	deleted_particles = deleted_particles + 1
[1359]	664	ENDIF
[849]	665
[1359]	666	ELSEIF ( ibc_par_ns == 1 ) THEN
[849]	667	!
[1359]	668	!-- Particle absorption
	669	particles(n)%particle_mask = .FALSE.
	670	deleted_particles = deleted_particles + 1
[849]	671
[1359]	672	ELSEIF ( ibc_par_ns == 2 ) THEN
[849]	673	!
[1359]	674	!-- Particle reflection
	675	particles(n)%y = 2 * ( ny * dy ) - particles(n)%y
	676	particles(n)%speed_y = -particles(n)%speed_y
[849]	677
[1359]	678	ENDIF
	679	ELSE
[849]	680	!
[1359]	681	!-- Store particle data in the transfer array, which will
	682	!-- be send to the neighbouring PE
	683	trnp_count = trnp_count + 1
	684	trnp(trnp_count) = particles(n)
	685	particles(n)%particle_mask = .FALSE.
	686	deleted_particles = deleted_particles + 1
[849]	687
[1359]	688	ENDIF
	689
	690	ENDIF
[849]	691	ENDIF
[1359]	692	ENDDO
	693	ENDDO
	694	ENDDO
[849]	695	ENDDO
	696
	697	!
	698	!-- Send front boundary, receive back boundary (but first exchange how many
	699	!-- and check, if particle storage must be extended)
	700	IF ( pdims(2) /= 1 ) THEN
	701
	702	CALL MPI_SENDRECV( trsp_count, 1, MPI_INTEGER, psouth, 0, &
	703	trnp_count_recv, 1, MPI_INTEGER, pnorth, 0, &
	704	comm2d, status, ierr )
	705
[1359]	706	ALLOCATE(rvnp(MAX(1,trnp_count_recv)))
[2305]	707	!
	708	!-- This MPI_SENDRECV should work even with odd mixture on 32 and 64 Bit
	709	!-- variables in structure particle_type (due to the calculation of par_size)
	710	CALL MPI_SENDRECV( trsp, trsp_count*par_size, MPI_BYTE, &
	711	psouth, 1, rvnp, &
	712	trnp_count_recv*par_size, MPI_BYTE, pnorth, 1, &
[849]	713	comm2d, status, ierr )
	714
[1359]	715	IF ( trnp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvnp(1:trnp_count_recv))
	716
	717	DEALLOCATE(rvnp)
	718
[849]	719	!
	720	!-- Send back boundary, receive front boundary
	721	CALL MPI_SENDRECV( trnp_count, 1, MPI_INTEGER, pnorth, 0, &
	722	trsp_count_recv, 1, MPI_INTEGER, psouth, 0, &
	723	comm2d, status, ierr )
	724
[1359]	725	ALLOCATE(rvsp(MAX(1,trsp_count_recv)))
[2305]	726	!
	727	!-- This MPI_SENDRECV should work even with odd mixture on 32 and 64 Bit
	728	!-- variables in structure particle_type (due to the calculation of par_size)
	729	CALL MPI_SENDRECV( trnp, trnp_count*par_size, MPI_BYTE, &
	730	pnorth, 1, rvsp, &
	731	trsp_count_recv*par_size, MPI_BYTE, psouth, 1, &
[849]	732	comm2d, status, ierr )
	733
[1359]	734	IF ( trsp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvsp(1:trsp_count_recv))
	735
	736	DEALLOCATE(rvsp)
	737
[849]	738	number_of_particles = number_of_particles + trsp_count_recv
	739
	740	DEALLOCATE( trsp, trnp )
	741
	742	ENDIF
	743
[1929]	744	DEALLOCATE( move_also_north )
	745	DEALLOCATE( move_also_south )
	746
[849]	747	#else
	748
[1929]	749	DO ip = nxl, nxr, nxr-nxl
	750	DO jp = nys, nyn
	751	DO kp = nzb+1, nzt
	752	number_of_particles = prt_count(kp,jp,ip)
	753	IF ( number_of_particles <= 0 ) CYCLE
	754	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	755	DO n = 1, number_of_particles
[849]	756	!
[1929]	757	!-- Apply boundary conditions
[849]	758
[2606]	759	IF ( particles(n)%x < 0.0_wp ) THEN
[849]	760
[1929]	761	IF ( ibc_par_lr == 0 ) THEN
[849]	762	!
[1929]	763	!-- Cyclic boundary. Relevant coordinate has to be changed.
	764	particles(n)%x = ( nx + 1 ) * dx + particles(n)%x
[2606]	765	particles(n)%origin_x = ( nx + 1 ) * dx + &
	766	particles(n)%origin_x
[1929]	767	ELSEIF ( ibc_par_lr == 1 ) THEN
[849]	768	!
[1929]	769	!-- Particle absorption
	770	particles(n)%particle_mask = .FALSE.
	771	deleted_particles = deleted_particles + 1
[1822]	772
[1929]	773	ELSEIF ( ibc_par_lr == 2 ) THEN
[849]	774	!
[1929]	775	!-- Particle reflection
	776	particles(n)%x = -dx - particles(n)%x
	777	particles(n)%speed_x = -particles(n)%speed_x
	778	ENDIF
[849]	779
[2606]	780	ELSEIF ( particles(n)%x >= ( nx + 1) * dx ) THEN
[849]	781
[1929]	782	IF ( ibc_par_lr == 0 ) THEN
[849]	783	!
[1929]	784	!-- Cyclic boundary. Relevant coordinate has to be changed.
	785	particles(n)%x = particles(n)%x - ( nx + 1 ) * dx
[2606]	786	particles(n)%origin_x = particles(n)%origin_x - &
	787	( nx + 1 ) * dx
[1822]	788
[1929]	789	ELSEIF ( ibc_par_lr == 1 ) THEN
[849]	790	!
[1929]	791	!-- Particle absorption
	792	particles(n)%particle_mask = .FALSE.
	793	deleted_particles = deleted_particles + 1
[1822]	794
[1929]	795	ELSEIF ( ibc_par_lr == 2 ) THEN
[849]	796	!
[1929]	797	!-- Particle reflection
	798	particles(n)%x = ( nx + 1 ) * dx - particles(n)%x
	799	particles(n)%speed_x = -particles(n)%speed_x
	800	ENDIF
[849]	801
[1929]	802	ENDIF
	803	ENDDO
	804	ENDDO
	805	ENDDO
	806	ENDDO
[849]	807
[1929]	808	DO ip = nxl, nxr
	809	DO jp = nys, nyn, nyn-nys
	810	DO kp = nzb+1, nzt
	811	number_of_particles = prt_count(kp,jp,ip)
	812	IF ( number_of_particles <= 0 ) CYCLE
	813	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	814	DO n = 1, number_of_particles
[849]	815
[2606]	816	IF ( particles(n)%y < 0.0_wp) THEN
[1929]	817
	818	IF ( ibc_par_ns == 0 ) THEN
[849]	819	!
[1929]	820	!-- Cyclic boundary. Relevant coordinate has to be changed.
	821	particles(n)%y = ( ny + 1 ) * dy + particles(n)%y
[2606]	822	particles(n)%origin_y = ( ny + 1 ) * dy + &
	823	particles(n)%origin_y
[1822]	824
[1929]	825	ELSEIF ( ibc_par_ns == 1 ) THEN
[849]	826	!
[1929]	827	!-- Particle absorption
	828	particles(n)%particle_mask = .FALSE.
	829	deleted_particles = deleted_particles + 1
[1822]	830
[1929]	831	ELSEIF ( ibc_par_ns == 2 ) THEN
[849]	832	!
[1929]	833	!-- Particle reflection
	834	particles(n)%y = -dy - particles(n)%y
	835	particles(n)%speed_y = -particles(n)%speed_y
	836	ENDIF
[849]	837
[2606]	838	ELSEIF ( particles(n)%y >= ( ny + 1) * dy ) THEN
[849]	839
[1929]	840	IF ( ibc_par_ns == 0 ) THEN
[849]	841	!
[1929]	842	!-- Cyclic boundary. Relevant coordinate has to be changed.
	843	particles(n)%y = particles(n)%y - ( ny + 1 ) * dy
[2606]	844	particles(n)%origin_y = particles(n)%origin_y - &
	845	( ny + 1 ) * dy
[1822]	846
[1929]	847	ELSEIF ( ibc_par_ns == 1 ) THEN
[849]	848	!
[1929]	849	!-- Particle absorption
	850	particles(n)%particle_mask = .FALSE.
	851	deleted_particles = deleted_particles + 1
[1822]	852
[1929]	853	ELSEIF ( ibc_par_ns == 2 ) THEN
[849]	854	!
[1929]	855	!-- Particle reflection
	856	particles(n)%y = ( ny + 1 ) * dy - particles(n)%y
	857	particles(n)%speed_y = -particles(n)%speed_y
	858	ENDIF
[849]	859
[1929]	860	ENDIF
	861
	862	ENDDO
	863	ENDDO
	864	ENDDO
[849]	865	ENDDO
	866	#endif
	867
	868	!
	869	!-- Accumulate the number of particles transferred between the subdomains
	870	#if defined( __parallel )
	871	trlp_count_sum = trlp_count_sum + trlp_count
	872	trlp_count_recv_sum = trlp_count_recv_sum + trlp_count_recv
	873	trrp_count_sum = trrp_count_sum + trrp_count
	874	trrp_count_recv_sum = trrp_count_recv_sum + trrp_count_recv
	875	trsp_count_sum = trsp_count_sum + trsp_count
	876	trsp_count_recv_sum = trsp_count_recv_sum + trsp_count_recv
	877	trnp_count_sum = trnp_count_sum + trnp_count
	878	trnp_count_recv_sum = trnp_count_recv_sum + trnp_count_recv
	879	#endif
	880
[1359]	881	CALL cpu_log( log_point_s(23), 'lpm_exchange_horiz', 'stop' )
[849]	882
	883	END SUBROUTINE lpm_exchange_horiz
[1359]	884
[1682]	885	!------------------------------------------------------------------------------!
	886	! Description:
	887	! ------------
	888	!> If a particle moves from one processor to another, this subroutine moves
	889	!> the corresponding elements from the particle arrays of the old grid cells
	890	!> to the particle arrays of the new grid cells.
	891	!------------------------------------------------------------------------------!
[1359]	892	SUBROUTINE Add_particles_to_gridcell (particle_array)
	893
	894	IMPLICIT NONE
	895
[1929]	896	INTEGER(iwp) :: ip !< grid index (x) of particle
	897	INTEGER(iwp) :: jp !< grid index (x) of particle
	898	INTEGER(iwp) :: kp !< grid index (x) of particle
	899	INTEGER(iwp) :: n !< index variable of particle
	900	INTEGER(iwp) :: pindex !< dummy argument for new number of particles per grid box
[1359]	901
[1682]	902	LOGICAL :: pack_done !<
[1359]	903
[1929]	904	TYPE(particle_type), DIMENSION(:), INTENT(IN) :: particle_array !< new particles in a grid box
	905	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: temp_ns !< temporary particle array for reallocation
[1359]	906
	907	pack_done = .FALSE.
	908
[1929]	909	DO n = 1, SIZE(particle_array)
[1359]	910
[1929]	911	IF ( .NOT. particle_array(n)%particle_mask ) CYCLE
	912
[2606]	913	ip = particle_array(n)%x * ddx
	914	jp = particle_array(n)%y * ddy
[3065]	915	kp = particle_array(n)%z / dz(1) + 1 + offset_ocean_nzt
[2628]	916	!
	917	!-- In case of grid stretching a particle might be above or below the
	918	!-- previously calculated particle grid box (indices).
	919	DO WHILE( zw(kp) < particle_array(n)%z )
	920	kp = kp + 1
	921	ENDDO
[1359]	922
[2628]	923	DO WHILE( zw(kp-1) > particle_array(n)%z )
	924	kp = kp - 1
	925	ENDDO
	926
[1359]	927	IF ( ip >= nxl .AND. ip <= nxr .AND. jp >= nys .AND. jp <= nyn &
	928	.AND. kp >= nzb+1 .AND. kp <= nzt) THEN ! particle stays on processor
	929	number_of_particles = prt_count(kp,jp,ip)
	930	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	931
	932	pindex = prt_count(kp,jp,ip)+1
	933	IF( pindex > SIZE(grid_particles(kp,jp,ip)%particles) ) THEN
	934	IF ( pack_done ) THEN
	935	CALL realloc_particles_array (ip,jp,kp)
	936	ELSE
[2606]	937	CALL lpm_pack
[1359]	938	prt_count(kp,jp,ip) = number_of_particles
	939	pindex = prt_count(kp,jp,ip)+1
	940	IF ( pindex > SIZE(grid_particles(kp,jp,ip)%particles) ) THEN
	941	CALL realloc_particles_array (ip,jp,kp)
	942	ENDIF
	943	pack_done = .TRUE.
	944	ENDIF
	945	ENDIF
	946	grid_particles(kp,jp,ip)%particles(pindex) = particle_array(n)
	947	prt_count(kp,jp,ip) = pindex
	948	ELSE
[1929]	949	IF ( jp <= nys - 1 ) THEN
[1359]	950	nr_move_south = nr_move_south+1
[1929]	951	!
	952	!-- Before particle information is swapped to exchange-array, check
	953	!-- if enough memory is allocated. If required, reallocate exchange
	954	!-- array.
	955	IF ( nr_move_south > SIZE(move_also_south) ) THEN
	956	!
	957	!-- At first, allocate further temporary array to swap particle
	958	!-- information.
	959	ALLOCATE( temp_ns(SIZE(move_also_south)+NR_2_direction_move) )
	960	temp_ns(1:nr_move_south-1) = move_also_south(1:nr_move_south-1)
	961	DEALLOCATE( move_also_south )
	962	ALLOCATE( move_also_south(SIZE(temp_ns)) )
	963	move_also_south(1:nr_move_south-1) = temp_ns(1:nr_move_south-1)
	964	DEALLOCATE( temp_ns )
	965
	966	ENDIF
	967
[1359]	968	move_also_south(nr_move_south) = particle_array(n)
[1929]	969
[1359]	970	IF ( jp == -1 ) THEN
[2245]	971	!
	972	!-- Apply boundary condition along y
	973	IF ( ibc_par_ns == 0 ) THEN
	974	move_also_south(nr_move_south)%y = &
	975	move_also_south(nr_move_south)%y + ( ny + 1 ) * dy
	976	move_also_south(nr_move_south)%origin_y = &
	977	move_also_south(nr_move_south)%origin_y + ( ny + 1 ) * dy
	978	ELSEIF ( ibc_par_ns == 1 ) THEN
	979	!
	980	!-- Particle absorption
	981	move_also_south(nr_move_south)%particle_mask = .FALSE.
	982	deleted_particles = deleted_particles + 1
	983
	984	ELSEIF ( ibc_par_ns == 2 ) THEN
	985	!
	986	!-- Particle reflection
	987	move_also_south(nr_move_south)%y = &
	988	-move_also_south(nr_move_south)%y
	989	move_also_south(nr_move_south)%speed_y = &
	990	-move_also_south(nr_move_south)%speed_y
	991
	992	ENDIF
[1359]	993	ENDIF
[1929]	994	ELSEIF ( jp >= nyn+1 ) THEN
[1359]	995	nr_move_north = nr_move_north+1
[1929]	996	!
	997	!-- Before particle information is swapped to exchange-array, check
	998	!-- if enough memory is allocated. If required, reallocate exchange
	999	!-- array.
	1000	IF ( nr_move_north > SIZE(move_also_north) ) THEN
	1001	!
	1002	!-- At first, allocate further temporary array to swap particle
	1003	!-- information.
	1004	ALLOCATE( temp_ns(SIZE(move_also_north)+NR_2_direction_move) )
	1005	temp_ns(1:nr_move_north-1) = move_also_south(1:nr_move_north-1)
	1006	DEALLOCATE( move_also_north )
	1007	ALLOCATE( move_also_north(SIZE(temp_ns)) )
	1008	move_also_north(1:nr_move_north-1) = temp_ns(1:nr_move_north-1)
	1009	DEALLOCATE( temp_ns )
	1010
	1011	ENDIF
	1012
[1359]	1013	move_also_north(nr_move_north) = particle_array(n)
	1014	IF ( jp == ny+1 ) THEN
[2245]	1015	!
	1016	!-- Apply boundary condition along y
	1017	IF ( ibc_par_ns == 0 ) THEN
	1018
	1019	move_also_north(nr_move_north)%y = &
	1020	move_also_north(nr_move_north)%y - ( ny + 1 ) * dy
	1021	move_also_north(nr_move_north)%origin_y = &
	1022	move_also_north(nr_move_north)%origin_y - ( ny + 1 ) * dy
	1023	ELSEIF ( ibc_par_ns == 1 ) THEN
	1024	!
	1025	!-- Particle absorption
	1026	move_also_north(nr_move_north)%particle_mask = .FALSE.
	1027	deleted_particles = deleted_particles + 1
	1028
	1029	ELSEIF ( ibc_par_ns == 2 ) THEN
	1030	!
	1031	!-- Particle reflection
	1032	move_also_north(nr_move_north)%y = &
	1033	-move_also_north(nr_move_north)%y
	1034	move_also_north(nr_move_north)%speed_y = &
	1035	-move_also_north(nr_move_north)%speed_y
	1036
	1037	ENDIF
[1359]	1038	ENDIF
	1039	ELSE
	1040	WRITE(0,'(a,8i7)') 'particle out of range ',myid,ip,jp,kp,nxl,nxr,nys,nyn
	1041	ENDIF
	1042	ENDIF
	1043	ENDDO
	1044
	1045	RETURN
	1046
	1047	END SUBROUTINE Add_particles_to_gridcell
	1048
	1049
	1050
	1051
[1682]	1052	!------------------------------------------------------------------------------!
	1053	! Description:
	1054	! ------------
	1055	!> If a particle moves from one grid cell to another (on the current
	1056	!> processor!), this subroutine moves the corresponding element from the
	1057	!> particle array of the old grid cell to the particle array of the new grid
	1058	!> cell.
	1059	!------------------------------------------------------------------------------!
[1359]	1060	SUBROUTINE lpm_move_particle
[2628]	1061
[1359]	1062	IMPLICIT NONE
	1063
[1929]	1064	INTEGER(iwp) :: i !< grid index (x) of particle position
	1065	INTEGER(iwp) :: ip !< index variable along x
	1066	INTEGER(iwp) :: j !< grid index (y) of particle position
	1067	INTEGER(iwp) :: jp !< index variable along y
	1068	INTEGER(iwp) :: k !< grid index (z) of particle position
	1069	INTEGER(iwp) :: kp !< index variable along z
	1070	INTEGER(iwp) :: n !< index variable for particle array
[2606]	1071	INTEGER(iwp) :: np_before_move !< number of particles per grid box before moving
[1929]	1072	INTEGER(iwp) :: pindex !< dummy argument for number of new particle per grid box
[1359]	1073
[2606]	1074	TYPE(particle_type), DIMENSION(:), POINTER :: particles_before_move !< particles before moving
[1359]	1075
	1076	CALL cpu_log( log_point_s(41), 'lpm_move_particle', 'start' )
[2628]	1077	CALL lpm_check_cfl
[1359]	1078	DO ip = nxl, nxr
	1079	DO jp = nys, nyn
	1080	DO kp = nzb+1, nzt
	1081
[2606]	1082	np_before_move = prt_count(kp,jp,ip)
	1083	IF ( np_before_move <= 0 ) CYCLE
	1084	particles_before_move => grid_particles(kp,jp,ip)%particles(1:np_before_move)
[1359]	1085
[2606]	1086	DO n = 1, np_before_move
	1087	i = particles_before_move(n)%x * ddx
	1088	j = particles_before_move(n)%y * ddy
[2628]	1089	k = kp
	1090	!
	1091	!-- Find correct vertical particle grid box (necessary in case of grid stretching)
	1092	!-- Due to the CFL limitations only the neighbouring grid boxes are considered.
	1093	IF( zw(k) < particles_before_move(n)%z ) k = k + 1
	1094	IF( zw(k-1) > particles_before_move(n)%z ) k = k - 1
	1095
[2606]	1096	!-- For lpm_exchange_horiz to work properly particles need to be moved to the outermost gridboxes
	1097	!-- of the respective processor. If the particle index is inside the processor the following lines
	1098	!-- will not change the index
	1099	i = MIN ( i , nxr )
	1100	i = MAX ( i , nxl )
	1101	j = MIN ( j , nyn )
	1102	j = MAX ( j , nys )
[2628]	1103
[2606]	1104	k = MIN ( k , nzt )
	1105	k = MAX ( k , nzb+1 )
[2628]	1106
[1359]	1107	!
	1108	!-- Check, if particle has moved to another grid cell.
	1109	IF ( i /= ip .OR. j /= jp .OR. k /= kp ) THEN
[2606]	1110	!!
	1111	!-- If the particle stays on the same processor, the particle
	1112	!-- will be added to the particle array of the new processor.
	1113	number_of_particles = prt_count(k,j,i)
	1114	particles => grid_particles(k,j,i)%particles(1:number_of_particles)
[1359]	1115
[2606]	1116	pindex = prt_count(k,j,i)+1
	1117	IF ( pindex > SIZE(grid_particles(k,j,i)%particles) ) &
	1118	THEN
	1119	CALL realloc_particles_array(i,j,k)
	1120	ENDIF
[1359]	1121
[2606]	1122	grid_particles(k,j,i)%particles(pindex) = particles_before_move(n)
	1123	prt_count(k,j,i) = pindex
[1359]	1124
[2606]	1125	particles_before_move(n)%particle_mask = .FALSE.
[1359]	1126	ENDIF
	1127	ENDDO
	1128
	1129	ENDDO
	1130	ENDDO
	1131	ENDDO
	1132
	1133	CALL cpu_log( log_point_s(41), 'lpm_move_particle', 'stop' )
	1134
	1135	RETURN
	1136
	1137	END SUBROUTINE lpm_move_particle
[2628]	1138
	1139	!------------------------------------------------------------------------------!
	1140	! Description:
	1141	! ------------
	1142	!> Check CFL-criterion for each particle. If one particle violated the
	1143	!> criterion the particle will be deleted and a warning message is given.
	1144	!------------------------------------------------------------------------------!
	1145	SUBROUTINE lpm_check_cfl
	1146
	1147	IMPLICIT NONE
	1148
[2709]	1149	INTEGER(iwp) :: i !< running index, x-direction
	1150	INTEGER(iwp) :: j !< running index, y-direction
	1151	INTEGER(iwp) :: k !< running index, z-direction
	1152	INTEGER(iwp) :: n !< running index, number of particles
	1153
[2628]	1154	DO i = nxl, nxr
	1155	DO j = nys, nyn
	1156	DO k = nzb+1, nzt
	1157	number_of_particles = prt_count(k,j,i)
	1158	IF ( number_of_particles <= 0 ) CYCLE
	1159	particles => grid_particles(k,j,i)%particles(1:number_of_particles)
	1160	DO n = 1, number_of_particles
[2709]	1161	!
	1162	!-- Note, check for CFL does not work at first particle timestep
	1163	!-- when both, age and age_m are zero.
	1164	IF ( particles(n)%age - particles(n)%age_m > 0.0_wp ) THEN
	1165	IF(ABS(particles(n)%speed_x) > &
	1166	(dx/(particles(n)%age-particles(n)%age_m)) .OR. &
	1167	ABS(particles(n)%speed_y) > &
	1168	(dy/(particles(n)%age-particles(n)%age_m)) .OR. &
	1169	ABS(particles(n)%speed_z) > &
	1170	((zw(k)-zw(k-1))/(particles(n)%age-particles(n)%age_m))) &
	1171	THEN
	1172	WRITE( message_string, * ) &
[3046]	1173	'Particle violated CFL-criterion: &particle with id ', &
	1174	particles(n)%id, ' will be deleted!'
[2801]	1175	CALL message( 'lpm_check_cfl', 'PA0475', 0, 1, -1, 6, 0 )
[2709]	1176	particles(n)%particle_mask= .FALSE.
	1177	ENDIF
[2628]	1178	ENDIF
	1179	ENDDO
	1180	ENDDO
	1181	ENDDO
	1182	ENDDO
[1359]	1183
[2628]	1184	END SUBROUTINE lpm_check_cfl
	1185
[1682]	1186	!------------------------------------------------------------------------------!
	1187	! Description:
	1188	! ------------
[1929]	1189	!> If the allocated memory for the particle array do not suffice to add arriving
	1190	!> particles from neighbour grid cells, this subrouting reallocates the
	1191	!> particle array to assure enough memory is available.
[1682]	1192	!------------------------------------------------------------------------------!
[1359]	1193	SUBROUTINE realloc_particles_array (i,j,k,size_in)
	1194
	1195	IMPLICIT NONE
	1196
[1682]	1197	INTEGER(iwp), INTENT(in) :: i !<
	1198	INTEGER(iwp), INTENT(in) :: j !<
	1199	INTEGER(iwp), INTENT(in) :: k !<
[1822]	1200	INTEGER(iwp), INTENT(in), OPTIONAL :: size_in !<
[1359]	1201
[1682]	1202	INTEGER(iwp) :: old_size !<
	1203	INTEGER(iwp) :: new_size !<
	1204	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: tmp_particles_d !<
	1205	TYPE(particle_type), DIMENSION(500) :: tmp_particles_s !<
[1359]	1206
	1207	old_size = SIZE(grid_particles(k,j,i)%particles)
	1208
	1209	IF ( PRESENT(size_in) ) THEN
	1210	new_size = size_in
	1211	ELSE
[1822]	1212	new_size = old_size * ( 1.0_wp + alloc_factor / 100.0_wp )
[1359]	1213	ENDIF
	1214
[1929]	1215	new_size = MAX( new_size, min_nr_particle, old_size + 1 )
[1359]	1216
	1217	IF ( old_size <= 500 ) THEN
	1218
	1219	tmp_particles_s(1:old_size) = grid_particles(k,j,i)%particles(1:old_size)
	1220
	1221	DEALLOCATE(grid_particles(k,j,i)%particles)
	1222	ALLOCATE(grid_particles(k,j,i)%particles(new_size))
	1223
	1224	grid_particles(k,j,i)%particles(1:old_size) = tmp_particles_s(1:old_size)
	1225	grid_particles(k,j,i)%particles(old_size+1:new_size) = zero_particle
	1226
	1227	ELSE
	1228
	1229	ALLOCATE(tmp_particles_d(new_size))
	1230	tmp_particles_d(1:old_size) = grid_particles(k,j,i)%particles
	1231
	1232	DEALLOCATE(grid_particles(k,j,i)%particles)
	1233	ALLOCATE(grid_particles(k,j,i)%particles(new_size))
	1234
	1235	grid_particles(k,j,i)%particles(1:old_size) = tmp_particles_d(1:old_size)
	1236	grid_particles(k,j,i)%particles(old_size+1:new_size) = zero_particle
	1237
	1238	DEALLOCATE(tmp_particles_d)
	1239
	1240	ENDIF
	1241	particles => grid_particles(k,j,i)%particles(1:number_of_particles)
	1242
	1243	RETURN
	1244	END SUBROUTINE realloc_particles_array
	1245
[1936]	1246
	1247
	1248
	1249
	1250	SUBROUTINE dealloc_particles_array
	1251
	1252	IMPLICIT NONE
	1253
	1254	INTEGER(iwp) :: i
	1255	INTEGER(iwp) :: j
	1256	INTEGER(iwp) :: k
	1257	INTEGER(iwp) :: old_size !<
	1258	INTEGER(iwp) :: new_size !<
	1259
	1260	LOGICAL :: dealloc
	1261
	1262	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: tmp_particles_d !<
	1263	TYPE(particle_type), DIMENSION(500) :: tmp_particles_s !<
	1264
	1265	DO i = nxl, nxr
	1266	DO j = nys, nyn
	1267	DO k = nzb+1, nzt
	1268	!
	1269	!-- Determine number of active particles
	1270	number_of_particles = prt_count(k,j,i)
	1271	!
	1272	!-- Determine allocated memory size
	1273	old_size = SIZE( grid_particles(k,j,i)%particles )
	1274	!
	1275	!-- Check for large unused memory
	1276	dealloc = ( ( number_of_particles < min_nr_particle .AND. &
	1277	old_size > min_nr_particle ) .OR. &
	1278	( number_of_particles > min_nr_particle .AND. &
	1279	old_size - number_of_particles * &
	1280	( 1.0_wp + 0.01_wp * alloc_factor ) > 0.0_wp ) )
	1281
	1282
	1283	IF ( dealloc ) THEN
	1284	IF ( number_of_particles < min_nr_particle ) THEN
	1285	new_size = min_nr_particle
	1286	ELSE
	1287	new_size = INT( number_of_particles * ( 1.0_wp + 0.01_wp * alloc_factor ) )
	1288	ENDIF
	1289
	1290	IF ( number_of_particles <= 500 ) THEN
	1291
	1292	tmp_particles_s(1:number_of_particles) = grid_particles(k,j,i)%particles(1:number_of_particles)
	1293
	1294	DEALLOCATE(grid_particles(k,j,i)%particles)
	1295	ALLOCATE(grid_particles(k,j,i)%particles(new_size))
	1296
	1297	grid_particles(k,j,i)%particles(1:number_of_particles) = tmp_particles_s(1:number_of_particles)
	1298	grid_particles(k,j,i)%particles(number_of_particles+1:new_size) = zero_particle
	1299
	1300	ELSE
	1301
	1302	ALLOCATE(tmp_particles_d(number_of_particles))
	1303	tmp_particles_d(1:number_of_particles) = grid_particles(k,j,i)%particles(1:number_of_particles)
	1304
	1305	DEALLOCATE(grid_particles(k,j,i)%particles)
	1306	ALLOCATE(grid_particles(k,j,i)%particles(new_size))
	1307
	1308	grid_particles(k,j,i)%particles(1:number_of_particles) = tmp_particles_d(1:number_of_particles)
	1309	grid_particles(k,j,i)%particles(number_of_particles+1:new_size) = zero_particle
	1310
	1311	DEALLOCATE(tmp_particles_d)
	1312
	1313	ENDIF
	1314
	1315	ENDIF
	1316	ENDDO
	1317	ENDDO
	1318	ENDDO
	1319
	1320	END SUBROUTINE dealloc_particles_array
	1321
	1322
[1359]	1323	END MODULE lpm_exchange_horiz_mod

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