Home

Context Navigation

source: palm/trunk/SOURCE/lpm_init.f90 @ 1685

Last change on this file since 1685 was 1685, checked in by raasch, 9 years ago
bugfix concerning vertical index calculation for particles in case of ocean runs
Property svn:keywords set to `Id`
File size: 36.2 KB

Line
1	!> @file lpm_init.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 terms
6	! of the GNU General Public License as published by the Free Software Foundation,
7	! either version 3 of the License, or (at your option) any later version.
8	!
9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
12	!
13	! You should have received a copy of the GNU General Public License along with
14	! PALM. If not, see <http://www.gnu.org/licenses/>.
15	!
16	! Copyright 1997-2014 Leibniz Universitaet Hannover
17	!--------------------------------------------------------------------------------!
18	!
19	! Current revisions:
20	! -----------------
21	! bugfix concerning vertical index offset in case of ocean
22	!
23	! Former revisions:
24	! -----------------
25	! $Id: lpm_init.f90 1685 2015-10-08 07:32:13Z raasch $
26	!
27	! 1682 2015-10-07 23:56:08Z knoop
28	! Code annotations made doxygen readable
29	!
30	! 1575 2015-03-27 09:56:27Z raasch
31	! initial vertical particle position is allowed to follow the topography
32	!
33	! 1359 2014-04-11 17:15:14Z hoffmann
34	! New particle structure integrated.
35	! Kind definition added to all floating point numbers.
36	! lpm_init changed form a subroutine to a module.
37	!
38	! 1327 2014-03-21 11:00:16Z raasch
39	! -netcdf_output
40	!
41	! 1322 2014-03-20 16:38:49Z raasch
42	! REAL functions provided with KIND-attribute
43	!
44	! 1320 2014-03-20 08:40:49Z raasch
45	! ONLY-attribute added to USE-statements,
46	! kind-parameters added to all INTEGER and REAL declaration statements,
47	! kinds are defined in new module kinds,
48	! revision history before 2012 removed,
49	! comment fields (!:) to be used for variable explanations added to
50	! all variable declaration statements
51	! bugfix: #if defined( __parallel ) added
52	!
53	! 1314 2014-03-14 18:25:17Z suehring
54	! Vertical logarithmic interpolation of horizontal particle speed for particles
55	! between roughness height and first vertical grid level.
56	!
57	! 1092 2013-02-02 11:24:22Z raasch
58	! unused variables removed
59	!
60	! 1036 2012-10-22 13:43:42Z raasch
61	! code put under GPL (PALM 3.9)
62	!
63	! 849 2012-03-15 10:35:09Z raasch
64	! routine renamed: init_particles -> lpm_init
65	! de_dx, de_dy, de_dz are allocated here (instead of automatic arrays in
66	! advec_particles),
67	! sort_particles renamed lpm_sort_arrays, user_init_particles renamed lpm_init
68	!
69	! 828 2012-02-21 12:00:36Z raasch
70	! call of init_kernels, particle feature color renamed class
71	!
72	! 824 2012-02-17 09:09:57Z raasch
73	! particle attributes speed_x\|y\|z_sgs renamed rvar1\|2\|3,
74	! array particles implemented as pointer
75	!
76	! 667 2010-12-23 12:06:00Z suehring/gryschka
77	! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng for allocation
78	! of arrays.
79	!
80	! Revision 1.1 1999/11/25 16:22:38 raasch
81	! Initial revision
82	!
83	!
84	! Description:
85	! ------------
86	!> This routine initializes a set of particles and their attributes (position,
87	!> radius, ..) which are used by the Lagrangian particle model (see lpm).
88	!------------------------------------------------------------------------------!
89	MODULE lpm_init_mod
90
91
92	USE arrays_3d, &
93	ONLY: de_dx, de_dy, de_dz, zu, zw, z0
94
95	USE cloud_parameters, &
96	ONLY: curvature_solution_effects
97
98	USE control_parameters, &
99	ONLY: cloud_droplets, current_timestep_number, dz, &
100	initializing_actions, message_string, netcdf_data_format, &
101	ocean, prandtl_layer, simulated_time
102
103	USE dvrp_variables, &
104	ONLY: particle_color, particle_dvrpsize
105
106	USE grid_variables, &
107	ONLY: ddx, dx, ddy, dy
108
109	USE indices, &
110	ONLY: nx, nxl, nxlg, nxrg, nxr, ny, nyn, nys, nyng, nysg, nz, nzb, &
111	nzb_w_inner, nzt
112
113	USE kinds
114
115	USE lpm_collision_kernels_mod, &
116	ONLY: init_kernels
117
118	USE particle_attributes, &
119	ONLY: alloc_factor, bc_par_b, bc_par_lr, bc_par_ns, bc_par_t, &
120	block_offset, block_offset_def, collision_kernel, &
121	density_ratio, dvrp_psize, grid_particles, &
122	initial_weighting_factor, ibc_par_b, ibc_par_lr, ibc_par_ns, &
123	ibc_par_t, iran_part, log_z_z0, &
124	max_number_of_particle_groups, maximum_number_of_particles, &
125	maximum_number_of_tailpoints, maximum_number_of_tails, &
126	minimum_tailpoint_distance, min_nr_particle, &
127	mpi_particle_type, new_tail_id, &
128	number_of_initial_tails, number_of_particles, &
129	number_of_particle_groups, number_of_sublayers, &
130	number_of_tails, offset_ocean_nzt, offset_ocean_nzt_m1, &
131	particles, particle_advection_start, particle_groups, &
132	particle_groups_type, particles_per_point, &
133	particle_tail_coordinates, particle_type, pdx, pdy, pdz, &
134	prt_count, psb, psl, psn, psr, pss, pst, &
135	radius, random_start_position, read_particles_from_restartfile,&
136	seed_follows_topography, skip_particles_for_tail, sort_count, &
137	tail_mask, total_number_of_particles, total_number_of_tails, &
138	use_particle_tails, use_sgs_for_particles, &
139	write_particle_statistics, uniform_particles, zero_particle, &
140	z0_av_global
141
142	USE pegrid
143
144	USE random_function_mod, &
145	ONLY: random_function
146
147	IMPLICIT NONE
148
149	PRIVATE
150
151	INTEGER(iwp), PARAMETER :: PHASE_INIT = 1 !<
152	INTEGER(iwp), PARAMETER, PUBLIC :: PHASE_RELEASE = 2 !<
153
154	INTERFACE lpm_init
155	MODULE PROCEDURE lpm_init
156	END INTERFACE lpm_init
157
158	INTERFACE lpm_create_particle
159	MODULE PROCEDURE lpm_create_particle
160	END INTERFACE lpm_create_particle
161
162	PUBLIC lpm_init, lpm_create_particle
163
164	CONTAINS
165
166	!------------------------------------------------------------------------------!
167	! Description:
168	! ------------
169	!> @todo Missing subroutine description.
170	!------------------------------------------------------------------------------!
171	SUBROUTINE lpm_init
172
173	USE lpm_collision_kernels_mod, &
174	ONLY: init_kernels
175
176	IMPLICIT NONE
177
178	INTEGER(iwp) :: i !<
179	INTEGER(iwp) :: ip !<
180	INTEGER(iwp) :: j !<
181	INTEGER(iwp) :: jp !<
182	INTEGER(iwp) :: k !<
183	INTEGER(iwp) :: kp !<
184	INTEGER(iwp) :: n !<
185	INTEGER(iwp) :: nn !<
186
187	#if defined( __parallel )
188	INTEGER(iwp), DIMENSION(3) :: blocklengths !<
189	INTEGER(iwp), DIMENSION(3) :: displacements !<
190	INTEGER(iwp), DIMENSION(3) :: types !<
191	#endif
192	LOGICAL :: uniform_particles_l !<
193
194	REAL(wp) :: height_int !<
195	REAL(wp) :: height_p !<
196	REAL(wp) :: z_p !<
197	REAL(wp) :: z0_av_local !<
198
199	#if defined( __parallel )
200	!
201	!-- Define MPI derived datatype for FORTRAN datatype particle_type (see module
202	!-- particle_attributes). Integer length is 4 byte, Real is 8 byte
203	#if defined( __twocachelines )
204	blocklengths(1) = 7; blocklengths(2) = 18; blocklengths(3) = 1
205	displacements(1) = 0; displacements(2) = 64; displacements(3) = 128
206
207	types(1) = MPI_REAL ! 64 bit words
208	types(2) = MPI_INTEGER ! 32 Bit words
209	types(3) = MPI_UB
210	#else
211	blocklengths(1) = 19; blocklengths(2) = 6; blocklengths(3) = 1
212	displacements(1) = 0; displacements(2) = 152; displacements(3) = 176
213
214	types(1) = MPI_REAL
215	types(2) = MPI_INTEGER
216	types(3) = MPI_UB
217	#endif
218	CALL MPI_TYPE_STRUCT( 3, blocklengths, displacements, types, &
219	mpi_particle_type, ierr )
220	CALL MPI_TYPE_COMMIT( mpi_particle_type, ierr )
221	#endif
222
223	!
224	!-- In case of oceans runs, the vertical index calculations need an offset,
225	!-- because otherwise the k indices will become negative
226	IF ( ocean ) THEN
227	offset_ocean_nzt = nzt
228	offset_ocean_nzt_m1 = nzt - 1
229	ENDIF
230
231	!
232	!-- Define block offsets for dividing a gridcell in 8 sub cells
233
234	block_offset(0) = block_offset_def (-1,-1,-1)
235	block_offset(1) = block_offset_def (-1,-1, 0)
236	block_offset(2) = block_offset_def (-1, 0,-1)
237	block_offset(3) = block_offset_def (-1, 0, 0)
238	block_offset(4) = block_offset_def ( 0,-1,-1)
239	block_offset(5) = block_offset_def ( 0,-1, 0)
240	block_offset(6) = block_offset_def ( 0, 0,-1)
241	block_offset(7) = block_offset_def ( 0, 0, 0)
242	!
243	!-- Check the number of particle groups.
244	IF ( number_of_particle_groups > max_number_of_particle_groups ) THEN
245	WRITE( message_string, * ) 'max_number_of_particle_groups =', &
246	max_number_of_particle_groups , &
247	'&number_of_particle_groups reset to ', &
248	max_number_of_particle_groups
249	CALL message( 'lpm_init', 'PA0213', 0, 1, 0, 6, 0 )
250	number_of_particle_groups = max_number_of_particle_groups
251	ENDIF
252
253	!
254	!-- Set default start positions, if necessary
255	IF ( psl(1) == 9999999.9_wp ) psl(1) = -0.5_wp * dx
256	IF ( psr(1) == 9999999.9_wp ) psr(1) = ( nx + 0.5_wp ) * dx
257	IF ( pss(1) == 9999999.9_wp ) pss(1) = -0.5_wp * dy
258	IF ( psn(1) == 9999999.9_wp ) psn(1) = ( ny + 0.5_wp ) * dy
259	IF ( psb(1) == 9999999.9_wp ) psb(1) = zu(nz/2)
260	IF ( pst(1) == 9999999.9_wp ) pst(1) = psb(1)
261
262	IF ( pdx(1) == 9999999.9_wp .OR. pdx(1) == 0.0_wp ) pdx(1) = dx
263	IF ( pdy(1) == 9999999.9_wp .OR. pdy(1) == 0.0_wp ) pdy(1) = dy
264	IF ( pdz(1) == 9999999.9_wp .OR. pdz(1) == 0.0_wp ) pdz(1) = zu(2) - zu(1)
265
266	DO j = 2, number_of_particle_groups
267	IF ( psl(j) == 9999999.9_wp ) psl(j) = psl(j-1)
268	IF ( psr(j) == 9999999.9_wp ) psr(j) = psr(j-1)
269	IF ( pss(j) == 9999999.9_wp ) pss(j) = pss(j-1)
270	IF ( psn(j) == 9999999.9_wp ) psn(j) = psn(j-1)
271	IF ( psb(j) == 9999999.9_wp ) psb(j) = psb(j-1)
272	IF ( pst(j) == 9999999.9_wp ) pst(j) = pst(j-1)
273	IF ( pdx(j) == 9999999.9_wp .OR. pdx(j) == 0.0_wp ) pdx(j) = pdx(j-1)
274	IF ( pdy(j) == 9999999.9_wp .OR. pdy(j) == 0.0_wp ) pdy(j) = pdy(j-1)
275	IF ( pdz(j) == 9999999.9_wp .OR. pdz(j) == 0.0_wp ) pdz(j) = pdz(j-1)
276	ENDDO
277
278	!
279	!-- Allocate arrays required for calculating particle SGS velocities
280	IF ( use_sgs_for_particles ) THEN
281	ALLOCATE( de_dx(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
282	de_dy(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
283	de_dz(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
284	ENDIF
285
286	!
287	!-- Allocate array required for logarithmic vertical interpolation of
288	!-- horizontal particle velocities between the surface and the first vertical
289	!-- grid level. In order to avoid repeated CPU cost-intensive CALLS of
290	!-- intrinsic FORTRAN procedure LOG(z/z0), LOG(z/z0) is precalculated for
291	!-- several heights. Splitting into 20 sublayers turned out to be sufficient.
292	!-- To obtain exact height levels of particles, linear interpolation is applied
293	!-- (see lpm_advec.f90).
294	IF ( prandtl_layer ) THEN
295
296	ALLOCATE ( log_z_z0(0:number_of_sublayers) )
297	z_p = zu(nzb+1) - zw(nzb)
298
299	!
300	!-- Calculate horizontal mean value of z0 used for logartihmic
301	!-- interpolation. Note: this is not exact for heterogeneous z0.
302	!-- However, sensitivity studies showed that the effect is
303	!-- negligible.
304	z0_av_local = SUM( z0(nys:nyn,nxl:nxr) )
305	z0_av_global = 0.0_wp
306
307	#if defined( __parallel )
308	CALL MPI_ALLREDUCE(z0_av_local, z0_av_global, 1, MPI_REAL, MPI_SUM, &
309	comm2d, ierr )
310	#else
311	z0_av_global = z0_av_local
312	#endif
313
314	z0_av_global = z0_av_global / ( ( ny + 1 ) * ( nx + 1 ) )
315	!
316	!-- Horizontal wind speed is zero below and at z0
317	log_z_z0(0) = 0.0_wp
318	!
319	!-- Calculate vertical depth of the sublayers
320	height_int = ( z_p - z0_av_global ) / REAL( number_of_sublayers, KIND=wp )
321	!
322	!-- Precalculate LOG(z/z0)
323	height_p = 0.0_wp
324	DO k = 1, number_of_sublayers
325
326	height_p = height_p + height_int
327	log_z_z0(k) = LOG( height_p / z0_av_global )
328
329	ENDDO
330
331
332	ENDIF
333
334	!
335	!-- Check boundary condition and set internal variables
336	SELECT CASE ( bc_par_b )
337
338	CASE ( 'absorb' )
339	ibc_par_b = 1
340
341	CASE ( 'reflect' )
342	ibc_par_b = 2
343
344	CASE DEFAULT
345	WRITE( message_string, * ) 'unknown boundary condition ', &
346	'bc_par_b = "', TRIM( bc_par_b ), '"'
347	CALL message( 'lpm_init', 'PA0217', 1, 2, 0, 6, 0 )
348
349	END SELECT
350	SELECT CASE ( bc_par_t )
351
352	CASE ( 'absorb' )
353	ibc_par_t = 1
354
355	CASE ( 'reflect' )
356	ibc_par_t = 2
357
358	CASE DEFAULT
359	WRITE( message_string, * ) 'unknown boundary condition ', &
360	'bc_par_t = "', TRIM( bc_par_t ), '"'
361	CALL message( 'lpm_init', 'PA0218', 1, 2, 0, 6, 0 )
362
363	END SELECT
364	SELECT CASE ( bc_par_lr )
365
366	CASE ( 'cyclic' )
367	ibc_par_lr = 0
368
369	CASE ( 'absorb' )
370	ibc_par_lr = 1
371
372	CASE ( 'reflect' )
373	ibc_par_lr = 2
374
375	CASE DEFAULT
376	WRITE( message_string, * ) 'unknown boundary condition ', &
377	'bc_par_lr = "', TRIM( bc_par_lr ), '"'
378	CALL message( 'lpm_init', 'PA0219', 1, 2, 0, 6, 0 )
379
380	END SELECT
381	SELECT CASE ( bc_par_ns )
382
383	CASE ( 'cyclic' )
384	ibc_par_ns = 0
385
386	CASE ( 'absorb' )
387	ibc_par_ns = 1
388
389	CASE ( 'reflect' )
390	ibc_par_ns = 2
391
392	CASE DEFAULT
393	WRITE( message_string, * ) 'unknown boundary condition ', &
394	'bc_par_ns = "', TRIM( bc_par_ns ), '"'
395	CALL message( 'lpm_init', 'PA0220', 1, 2, 0, 6, 0 )
396
397	END SELECT
398
399	!
400	!-- Initialize collision kernels
401	IF ( collision_kernel /= 'none' ) CALL init_kernels
402
403	!
404	!-- For the first model run of a possible job chain initialize the
405	!-- particles, otherwise read the particle data from restart file.
406	IF ( TRIM( initializing_actions ) == 'read_restart_data' &
407	.AND. read_particles_from_restartfile ) THEN
408
409	CALL lpm_read_restart_file
410
411	ELSE
412
413	!
414	!-- Allocate particle arrays and set attributes of the initial set of
415	!-- particles, which can be also periodically released at later times.
416	!-- Also allocate array for particle tail coordinates, if needed.
417	ALLOCATE( prt_count(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
418	grid_particles(nzb+1:nzt,nys:nyn,nxl:nxr) )
419
420	maximum_number_of_particles = 0
421	number_of_particles = 0
422
423	sort_count = 0
424	prt_count = 0
425
426	!
427	!-- Initialize all particles with dummy values (otherwise errors may
428	!-- occur within restart runs). The reason for this is still not clear
429	!-- and may be presumably caused by errors in the respective user-interface.
430	#if defined( __twocachelines )
431	zero_particle = particle_type( 0.0_wp, 0.0_sp, 0.0_sp, 0.0_sp, 0.0_sp, &
432	0.0_sp, 0.0_sp, 0.0_wp, 0.0_wp, 0.0_wp, &
433	0, .FALSE., 0.0_wp, 0.0_wp, 0.0_wp, &
434	0.0_sp, 0.0_sp, 0.0_sp, 0.0_sp, 0.0_sp, &
435	0.0_sp, 0, 0, 0, -1)
436	#else
437	zero_particle = particle_type( 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
438	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
439	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
440	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0, 0, 0, &
441	0, .FALSE., -1)
442	#endif
443	particle_groups = particle_groups_type( 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp )
444
445	!
446	!-- Set the default particle size used for dvrp plots
447	IF ( dvrp_psize == 9999999.9_wp ) dvrp_psize = 0.2_wp * dx
448
449	!
450	!-- Set values for the density ratio and radius for all particle
451	!-- groups, if necessary
452	IF ( density_ratio(1) == 9999999.9_wp ) density_ratio(1) = 0.0_wp
453	IF ( radius(1) == 9999999.9_wp ) radius(1) = 0.0_wp
454	DO i = 2, number_of_particle_groups
455	IF ( density_ratio(i) == 9999999.9_wp ) THEN
456	density_ratio(i) = density_ratio(i-1)
457	ENDIF
458	IF ( radius(i) == 9999999.9_wp ) radius(i) = radius(i-1)
459	ENDDO
460
461	DO i = 1, number_of_particle_groups
462	IF ( density_ratio(i) /= 0.0_wp .AND. radius(i) == 0 ) THEN
463	WRITE( message_string, * ) 'particle group #', i, 'has a', &
464	'density ratio /= 0 but radius = 0'
465	CALL message( 'lpm_init', 'PA0215', 1, 2, 0, 6, 0 )
466	ENDIF
467	particle_groups(i)%density_ratio = density_ratio(i)
468	particle_groups(i)%radius = radius(i)
469	ENDDO
470
471	CALL lpm_create_particle (PHASE_INIT)
472	!
473	!-- Set a seed value for the random number generator to be exclusively
474	!-- used for the particle code. The generated random numbers should be
475	!-- different on the different PEs.
476	iran_part = iran_part + myid
477
478	!
479	!-- User modification of initial particles
480	CALL user_lpm_init
481
482	!
483	!-- Open file for statistical informations about particle conditions
484	IF ( write_particle_statistics ) THEN
485	CALL check_open( 80 )
486	WRITE ( 80, 8000 ) current_timestep_number, simulated_time, &
487	number_of_particles, &
488	maximum_number_of_particles
489	CALL close_file( 80 )
490	ENDIF
491
492	!
493	!-- Check if particles are really uniform in color and radius (dvrp_size)
494	!-- (uniform_particles is preset TRUE)
495	IF ( uniform_particles ) THEN
496	DO ip = nxl, nxr
497	DO jp = nys, nyn
498	DO kp = nzb+1, nzt
499
500	n = prt_count(kp,jp,ip)
501	IF ( MINVAL( grid_particles(kp,jp,ip)%particles(1:n)%dvrp_psize ) == &
502	MAXVAL( grid_particles(kp,jp,ip)%particles(1:n)%dvrp_psize ) .AND. &
503	MINVAL( grid_particles(kp,jp,ip)%particles(1:n)%class ) == &
504	MAXVAL( grid_particles(kp,jp,ip)%particles(1:n)%class ) ) THEN
505	uniform_particles_l = .TRUE.
506	ELSE
507	uniform_particles_l = .FALSE.
508	ENDIF
509
510	ENDDO
511	ENDDO
512	ENDDO
513
514	#if defined( __parallel )
515	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
516	CALL MPI_ALLREDUCE( uniform_particles_l, uniform_particles, 1, &
517	MPI_LOGICAL, MPI_LAND, comm2d, ierr )
518	#else
519	uniform_particles = uniform_particles_l
520	#endif
521
522	ENDIF
523
524	!
525	!-- Particles will probably become none-uniform, if their size and color
526	!-- will be determined by flow variables
527	IF ( particle_color /= 'none' .OR. particle_dvrpsize /= 'none' ) THEN
528	uniform_particles = .FALSE.
529	ENDIF
530
531	! !kk Not implemented aft individual particle array fort every gridcell
532	! !
533	! !-- Set the beginning of the particle tails and their age
534	! IF ( use_particle_tails ) THEN
535	! !
536	! !-- Choose the maximum number of tails with respect to the maximum number
537	! !-- of particles and skip_particles_for_tail
538	! maximum_number_of_tails = maximum_number_of_particles / &
539	! skip_particles_for_tail
540	!
541	! !
542	! !-- Create a minimum number of tails in case that there is no tail
543	! !-- initially (otherwise, index errors will occur when adressing the
544	! !-- arrays below)
545	! IF ( maximum_number_of_tails == 0 ) maximum_number_of_tails = 10
546	!
547	! ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, &
548	! maximum_number_of_tails), &
549	! new_tail_id(maximum_number_of_tails), &
550	! tail_mask(maximum_number_of_tails) )
551	!
552	! particle_tail_coordinates = 0.0_wp
553	! minimum_tailpoint_distance = minimum_tailpoint_distance**2
554	! number_of_initial_tails = number_of_tails
555	!
556	! nn = 0
557	! DO n = 1, number_of_particles
558	! !
559	! !-- Only for those particles marked above with a provisional tail_id
560	! !-- tails will be created. Particles now get their final tail_id.
561	! IF ( particles(n)%tail_id /= 0 ) THEN
562	!
563	! nn = nn + 1
564	! particles(n)%tail_id = nn
565	!
566	! particle_tail_coordinates(1,1,nn) = particles(n)%x
567	! particle_tail_coordinates(1,2,nn) = particles(n)%y
568	! particle_tail_coordinates(1,3,nn) = particles(n)%z
569	! particle_tail_coordinates(1,4,nn) = particles(n)%class
570	! particles(n)%tailpoints = 1
571	! IF ( minimum_tailpoint_distance /= 0.0_wp ) THEN
572	! particle_tail_coordinates(2,1,nn) = particles(n)%x
573	! particle_tail_coordinates(2,2,nn) = particles(n)%y
574	! particle_tail_coordinates(2,3,nn) = particles(n)%z
575	! particle_tail_coordinates(2,4,nn) = particles(n)%class
576	! particle_tail_coordinates(1:2,5,nn) = 0.0_wp
577	! particles(n)%tailpoints = 2
578	! ENDIF
579	!
580	! ENDIF
581	! ENDDO
582	! ENDIF
583	!
584	! !
585	! !-- Plot initial positions of particles (only if particle advection is
586	! !-- switched on from the beginning of the simulation (t=0))
587	! IF ( particle_advection_start == 0.0_wp ) CALL data_output_dvrp
588
589	ENDIF
590
591	!
592	!-- To avoid programm abort, assign particles array to the local version of
593	!-- first grid cell
594	number_of_particles = prt_count(nzb+1,nys,nxl)
595	particles => grid_particles(nzb+1,nys,nxl)%particles(1:number_of_particles)
596
597	!
598	!-- Formats
599	8000 FORMAT (I6,1X,F7.2,4X,I10,71X,I10)
600
601	END SUBROUTINE lpm_init
602
603	!------------------------------------------------------------------------------!
604	! Description:
605	! ------------
606	!> @todo Missing subroutine description.
607	!------------------------------------------------------------------------------!
608	SUBROUTINE lpm_create_particle (phase)
609
610	USE lpm_exchange_horiz_mod, &
611	ONLY: lpm_exchange_horiz, lpm_move_particle, realloc_particles_array
612
613	USE lpm_pack_arrays_mod, &
614	ONLY: lpm_pack_all_arrays
615
616	IMPLICIT NONE
617
618	INTEGER(iwp) :: alloc_size !<
619	INTEGER(iwp) :: i !<
620	INTEGER(iwp) :: ip !<
621	INTEGER(iwp) :: j !<
622	INTEGER(iwp) :: jp !<
623	INTEGER(iwp) :: kp !<
624	INTEGER(iwp) :: loop_stride !<
625	INTEGER(iwp) :: n !<
626	INTEGER(iwp) :: new_size !<
627	INTEGER(iwp) :: nn !<
628
629	INTEGER(iwp), INTENT(IN) :: phase !<
630
631	INTEGER(iwp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: local_count !<
632	INTEGER(iwp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: local_start !<
633
634	LOGICAL :: first_stride !<
635
636	REAL(wp) :: pos_x !<
637	REAL(wp) :: pos_y !<
638	REAL(wp) :: pos_z !<
639
640	TYPE(particle_type),TARGET :: tmp_particle !<
641
642	!
643	!-- Calculate particle positions and store particle attributes, if
644	!-- particle is situated on this PE
645	DO loop_stride = 1, 2
646	first_stride = (loop_stride == 1)
647	IF ( first_stride ) THEN
648	local_count = 0 ! count number of particles
649	ELSE
650	local_count = prt_count ! Start address of new particles
651	ENDIF
652
653	n = 0
654	DO i = 1, number_of_particle_groups
655
656	pos_z = psb(i)
657
658	DO WHILE ( pos_z <= pst(i) )
659
660	pos_y = pss(i)
661
662	DO WHILE ( pos_y <= psn(i) )
663
664	IF ( pos_y >= ( nys - 0.5_wp ) * dy .AND. &
665	pos_y < ( nyn + 0.5_wp ) * dy ) THEN
666
667	pos_x = psl(i)
668
669	xloop: DO WHILE ( pos_x <= psr(i) )
670
671	IF ( pos_x >= ( nxl - 0.5_wp ) * dx .AND. &
672	pos_x < ( nxr + 0.5_wp ) * dx ) THEN
673
674	DO j = 1, particles_per_point
675
676	n = n + 1
677	#if defined( __twocachelines )
678	tmp_particle%x = pos_x
679	tmp_particle%y = pos_y
680	tmp_particle%z = pos_z
681	tmp_particle%age = 0.0_sp
682	tmp_particle%age_m = 0.0_sp
683	tmp_particle%dt_sum = 0.0_wp
684	tmp_particle%dvrp_psize = dvrp_psize
685	tmp_particle%e_m = 0.0_sp
686	IF ( curvature_solution_effects ) THEN
687	!
688	!-- Initial values (internal timesteps, derivative)
689	!-- for Rosenbrock method
690	tmp_particle%rvar1 = 1.0E-12_wp
691	tmp_particle%rvar2 = 1.0E-3_wp
692	tmp_particle%rvar3 = -9999999.9_wp
693	ELSE
694	!
695	!-- Initial values for SGS velocities
696	tmp_particle%rvar1 = 0.0_wp
697	tmp_particle%rvar2 = 0.0_wp
698	tmp_particle%rvar3 = 0.0_wp
699	ENDIF
700	tmp_particle%speed_x = 0.0_sp
701	tmp_particle%speed_y = 0.0_sp
702	tmp_particle%speed_z = 0.0_sp
703	tmp_particle%origin_x = pos_x
704	tmp_particle%origin_y = pos_y
705	tmp_particle%origin_z = pos_z
706	tmp_particle%radius = particle_groups(i)%radius
707	tmp_particle%weight_factor = initial_weighting_factor
708	tmp_particle%class = 1
709	tmp_particle%group = i
710	tmp_particle%tailpoints = 0
711	tmp_particle%particle_mask = .TRUE.
712	#else
713	tmp_particle%x = pos_x
714	tmp_particle%y = pos_y
715	tmp_particle%z = pos_z
716	tmp_particle%age = 0.0_wp
717	tmp_particle%age_m = 0.0_wp
718	tmp_particle%dt_sum = 0.0_wp
719	tmp_particle%dvrp_psize = dvrp_psize
720	tmp_particle%e_m = 0.0_wp
721	IF ( curvature_solution_effects ) THEN
722	!
723	!-- Initial values (internal timesteps, derivative)
724	!-- for Rosenbrock method
725	tmp_particle%rvar1 = 1.0E-12_wp
726	tmp_particle%rvar2 = 1.0E-3_wp
727	tmp_particle%rvar3 = -9999999.9_wp
728	ELSE
729	!
730	!-- Initial values for SGS velocities
731	tmp_particle%rvar1 = 0.0_wp
732	tmp_particle%rvar2 = 0.0_wp
733	tmp_particle%rvar3 = 0.0_wp
734	ENDIF
735	tmp_particle%speed_x = 0.0_wp
736	tmp_particle%speed_y = 0.0_wp
737	tmp_particle%speed_z = 0.0_wp
738	tmp_particle%origin_x = pos_x
739	tmp_particle%origin_y = pos_y
740	tmp_particle%origin_z = pos_z
741	tmp_particle%radius = particle_groups(i)%radius
742	tmp_particle%weight_factor = initial_weighting_factor
743	tmp_particle%class = 1
744	tmp_particle%group = i
745	tmp_particle%tailpoints = 0
746	tmp_particle%particle_mask = .TRUE.
747	#endif
748	IF ( use_particle_tails .AND. &
749	MOD( n, skip_particles_for_tail ) == 0 ) THEN
750	number_of_tails = number_of_tails + 1
751	!
752	!-- This is a temporary provisional setting (see
753	!-- further below!)
754	tmp_particle%tail_id = number_of_tails
755	ELSE
756	tmp_particle%tail_id = 0
757	ENDIF
758	!
759	!-- Determine the grid indices of the particle position
760	ip = ( tmp_particle%x + 0.5_wp * dx ) * ddx
761	jp = ( tmp_particle%y + 0.5_wp * dy ) * ddy
762	kp = tmp_particle%z / dz + 1 + offset_ocean_nzt
763
764	IF ( seed_follows_topography ) THEN
765	!
766	!-- Particle height is given relative to topography
767	kp = kp + nzb_w_inner(jp,ip)
768	tmp_particle%z = tmp_particle%z + zw(kp)
769	IF ( kp > nzt ) THEN
770	pos_x = pos_x + pdx(i)
771	CYCLE xloop
772	ENDIF
773	ENDIF
774
775	local_count(kp,jp,ip) = local_count(kp,jp,ip) + 1
776	IF ( .NOT. first_stride ) THEN
777	IF ( ip < nxl .OR. jp < nys .OR. kp < nzb+1 ) THEN
778	write(6,*) 'xl ',ip,jp,kp,nxl,nys,nzb+1
779	ENDIF
780	IF ( ip > nxr .OR. jp > nyn .OR. kp > nzt ) THEN
781	write(6,*) 'xu ',ip,jp,kp,nxr,nyn,nzt
782	ENDIF
783	grid_particles(kp,jp,ip)%particles(local_count(kp,jp,ip)) = tmp_particle
784	ENDIF
785	ENDDO
786
787	ENDIF
788
789	pos_x = pos_x + pdx(i)
790
791	ENDDO xloop
792
793	ENDIF
794
795	pos_y = pos_y + pdy(i)
796
797	ENDDO
798
799	pos_z = pos_z + pdz(i)
800
801	ENDDO
802
803	ENDDO
804
805	IF ( first_stride ) THEN
806	DO ip = nxl, nxr
807	DO jp = nys, nyn
808	DO kp = nzb+1, nzt
809	IF ( phase == PHASE_INIT ) THEN
810	IF ( local_count(kp,jp,ip) > 0 ) THEN
811	alloc_size = MAX( INT( local_count(kp,jp,ip) * &
812	( 1.0_wp + alloc_factor / 100.0_wp ) ), &
813	min_nr_particle )
814	ELSE
815	alloc_size = min_nr_particle
816	ENDIF
817	ALLOCATE(grid_particles(kp,jp,ip)%particles(1:alloc_size))
818	DO n = 1, alloc_size
819	grid_particles(kp,jp,ip)%particles(n) = zero_particle
820	ENDDO
821	ELSEIF ( phase == PHASE_RELEASE ) THEN
822	IF ( local_count(kp,jp,ip) > 0 ) THEN
823	new_size = local_count(kp,jp,ip) + prt_count(kp,jp,ip)
824	alloc_size = MAX( INT( new_size * ( 1.0_wp + &
825	alloc_factor / 100.0_wp ) ), min_nr_particle )
826	IF( alloc_size > SIZE( grid_particles(kp,jp,ip)%particles) ) THEN
827	CALL realloc_particles_array(ip,jp,kp,alloc_size)
828	ENDIF
829	ENDIF
830	ENDIF
831	ENDDO
832	ENDDO
833	ENDDO
834	ENDIF
835	ENDDO
836
837	local_start = prt_count+1
838	prt_count = local_count
839	!
840	!-- Add random fluctuation to particle positions
841	IF ( random_start_position ) THEN
842	DO ip = nxl, nxr
843	DO jp = nys, nyn
844	DO kp = nzb+1, nzt
845	number_of_particles = prt_count(kp,jp,ip)
846	IF ( number_of_particles <= 0 ) CYCLE
847	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
848
849	DO n = local_start(kp,jp,ip), number_of_particles !Move only new particles
850	IF ( psl(particles(n)%group) /= psr(particles(n)%group) ) THEN
851	particles(n)%x = particles(n)%x + &
852	( random_function( iran_part ) - 0.5_wp ) * &
853	pdx(particles(n)%group)
854	ENDIF
855	IF ( pss(particles(n)%group) /= psn(particles(n)%group) ) THEN
856	particles(n)%y = particles(n)%y + &
857	( random_function( iran_part ) - 0.5_wp ) * &
858	pdy(particles(n)%group)
859	ENDIF
860	IF ( psb(particles(n)%group) /= pst(particles(n)%group) ) THEN
861	particles(n)%z = particles(n)%z + &
862	( random_function( iran_part ) - 0.5_wp ) * &
863	pdz(particles(n)%group)
864	ENDIF
865	ENDDO
866	!
867	!-- Identify particles located outside the model domain
868	CALL lpm_boundary_conds( 'bottom/top' )
869	ENDDO
870	ENDDO
871	ENDDO
872	!
873	!-- Exchange particles between grid cells and processors
874	CALL lpm_move_particle
875	CALL lpm_exchange_horiz
876
877	ENDIF
878	!
879	!-- In case of random_start_position, delete particles identified by
880	!-- lpm_exchange_horiz and lpm_boundary_conds. Then sort particles into blocks,
881	!-- which is needed for a fast interpolation of the LES fields on the particle
882	!-- position.
883	CALL lpm_pack_all_arrays
884
885	!
886	!-- Determine maximum number of particles (i.e., all possible particles that
887	!-- have been allocated) and the current number of particles
888	DO ip = nxl, nxr
889	DO jp = nys, nyn
890	DO kp = nzb+1, nzt
891	maximum_number_of_particles = maximum_number_of_particles &
892	+ SIZE(grid_particles(kp,jp,ip)%particles)
893	number_of_particles = number_of_particles &
894	+ prt_count(kp,jp,ip)
895	ENDDO
896	ENDDO
897	ENDDO
898	!
899	!-- Calculate the number of particles and tails of the total domain
900	#if defined( __parallel )
901	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
902	CALL MPI_ALLREDUCE( number_of_particles, total_number_of_particles, 1, &
903	MPI_INTEGER, MPI_SUM, comm2d, ierr )
904	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
905	CALL MPI_ALLREDUCE( number_of_tails, total_number_of_tails, 1, &
906	MPI_INTEGER, MPI_SUM, comm2d, ierr )
907	#else
908	total_number_of_particles = number_of_particles
909	total_number_of_tails = number_of_tails
910	#endif
911
912	RETURN
913
914	END SUBROUTINE lpm_create_particle
915
916	END MODULE lpm_init_mod

Note: See TracBrowser for help on using the repository browser.

Download in other formats:

| Impressum | ©Leibniz Universität Hannover |