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source: palm/trunk/SOURCE/init_particles.f90 @ 109

Last change on this file since 109 was 106, checked in by raasch, 17 years ago
preliminary update of bugfixes and extensions for non-cyclic BCs
Property svn:keywords set to `Id`
File size: 20.3 KB

Rev	Line
[1]	1	SUBROUTINE init_particles
	2
	3	!------------------------------------------------------------------------------!
	4	! Actual revisions:
	5	! -----------------
[106]	6	! variable iran replaced by iran_part
[1]	7	!
	8	! Former revisions:
	9	! -----------------
[3]	10	! $Id: init_particles.f90 106 2007-08-16 14:30:26Z letzel $
[39]	11	!
[83]	12	! 82 2007-04-16 15:40:52Z raasch
	13	! Preprocessor directives for old systems removed
	14	!
[77]	15	! 70 2007-03-18 23:46:30Z raasch
	16	! displacements for mpi_particle_type changed, age_m initialized,
	17	! particles-package is now part of the default code
	18	!
[39]	19	! 16 2007-02-15 13:16:47Z raasch
	20	! Bugfix: MPI_REAL in MPI_ALLREDUCE replaced by MPI_INTEGER
	21	!
	22	! r4 \| raasch \| 2007-02-13 12:33:16 +0100 (Tue, 13 Feb 2007)
[3]	23	! RCS Log replace by Id keyword, revision history cleaned up
	24	!
[1]	25	! Revision 1.24 2007/02/11 13:00:17 raasch
	26	! Bugfix: allocation of tail_mask and new_tail_id in case of restart-runs
	27	! Bugfix: __ was missing in a cpp-directive
	28	!
	29	! Revision 1.1 1999/11/25 16:22:38 raasch
	30	! Initial revision
	31	!
	32	!
	33	! Description:
	34	! ------------
	35	! This routine initializes a set of particles and their attributes (position,
	36	! radius, ..). Advection of these particles is carried out by advec_particles,
	37	! plotting is done in data_output_dvrp.
	38	!------------------------------------------------------------------------------!
	39
	40	USE arrays_3d
	41	USE control_parameters
	42	USE grid_variables
	43	USE indices
	44	USE particle_attributes
	45	USE pegrid
	46	USE random_function_mod
	47
	48
	49	IMPLICIT NONE
	50
	51	CHARACTER (LEN=10) :: particle_binary_version, version_on_file
	52
	53	INTEGER :: i, j, n, nn
	54	#if defined( __parallel )
	55	INTEGER, DIMENSION(3) :: blocklengths, displacements, types
	56	#endif
	57	LOGICAL :: uniform_particles_l
	58	REAL :: factor, pos_x, pos_y, pos_z, value
	59
	60
	61	#if defined( __parallel )
	62	!
	63	!-- Define MPI derived datatype for FORTRAN datatype particle_type (see module
[82]	64	!-- particle_attributes). Integer length is 4 byte, Real is 8 byte
	65	blocklengths(1) = 19; blocklengths(2) = 4; blocklengths(3) = 1
	66	displacements(1) = 0; displacements(2) = 152; displacements(3) = 168
	67
[1]	68	types(1) = MPI_REAL
	69	types(2) = MPI_INTEGER
	70	types(3) = MPI_UB
	71	CALL MPI_TYPE_STRUCT( 3, blocklengths, displacements, types, &
	72	mpi_particle_type, ierr )
	73	CALL MPI_TYPE_COMMIT( mpi_particle_type, ierr )
	74	#endif
	75
	76	!
	77	!-- Check the number of particle groups.
	78	IF ( number_of_particle_groups > max_number_of_particle_groups ) THEN
	79	PRINT*, '+++ WARNING: init_particles: ', &
	80	'max_number_of_particle_groups =', &
	81	max_number_of_particle_groups
	82	PRINT*, '+++ number_of_particle_groups reset to ', &
	83	max_number_of_particle_groups
	84	number_of_particle_groups = max_number_of_particle_groups
	85	ENDIF
	86
	87	!
	88	!-- Set default start positions, if necessary
	89	IF ( psl(1) == 9999999.9 ) psl(1) = -0.5 * dx
	90	IF ( psr(1) == 9999999.9 ) psr(1) = ( nx + 0.5 ) * dx
	91	IF ( pss(1) == 9999999.9 ) pss(1) = -0.5 * dy
	92	IF ( psn(1) == 9999999.9 ) psn(1) = ( ny + 0.5 ) * dy
	93	IF ( psb(1) == 9999999.9 ) psb(1) = zu(nz/2)
	94	IF ( pst(1) == 9999999.9 ) pst(1) = psb(1)
	95
	96	IF ( pdx(1) == 9999999.9 .OR. pdx(1) == 0.0 ) pdx(1) = dx
	97	IF ( pdy(1) == 9999999.9 .OR. pdy(1) == 0.0 ) pdy(1) = dy
	98	IF ( pdz(1) == 9999999.9 .OR. pdz(1) == 0.0 ) pdz(1) = zu(2) - zu(1)
	99
	100	DO j = 2, number_of_particle_groups
	101	IF ( psl(j) == 9999999.9 ) psl(j) = psl(j-1)
	102	IF ( psr(j) == 9999999.9 ) psr(j) = psr(j-1)
	103	IF ( pss(j) == 9999999.9 ) pss(j) = pss(j-1)
	104	IF ( psn(j) == 9999999.9 ) psn(j) = psn(j-1)
	105	IF ( psb(j) == 9999999.9 ) psb(j) = psb(j-1)
	106	IF ( pst(j) == 9999999.9 ) pst(j) = pst(j-1)
	107	IF ( pdx(j) == 9999999.9 .OR. pdx(j) == 0.0 ) pdx(j) = pdx(j-1)
	108	IF ( pdy(j) == 9999999.9 .OR. pdy(j) == 0.0 ) pdy(j) = pdy(j-1)
	109	IF ( pdz(j) == 9999999.9 .OR. pdz(j) == 0.0 ) pdz(j) = pdz(j-1)
	110	ENDDO
	111
	112	!
	113	!-- For the first model run of a possible job chain initialize the
	114	!-- particles, otherwise read the particle data from file.
	115	IF ( TRIM( initializing_actions ) == 'read_restart_data' &
	116	.AND. read_particles_from_restartfile ) THEN
	117
	118	!
	119	!-- Read particle data from previous model run.
	120	!-- First open the input unit.
	121	IF ( myid_char == '' ) THEN
	122	OPEN ( 90, FILE='PARTICLE_RESTART_DATA_IN'//myid_char, &
	123	FORM='UNFORMATTED' )
	124	ELSE
	125	OPEN ( 90, FILE='PARTICLE_RESTART_DATA_IN/'//myid_char, &
	126	FORM='UNFORMATTED' )
	127	ENDIF
	128
	129	!
	130	!-- First compare the version numbers
	131	READ ( 90 ) version_on_file
	132	particle_binary_version = '3.0'
	133	IF ( TRIM( version_on_file ) /= TRIM( particle_binary_version ) ) THEN
	134	IF ( myid == 0 ) THEN
	135	PRINT*, '+++ init_particles: version mismatch concerning data ', &
	136	'from prior run'
	137	PRINT*, ' version on file = "', TRIM( version_on_file ),&
	138	'"'
	139	PRINT*, ' version in program = "', &
	140	TRIM( particle_binary_version ), '"'
	141	ENDIF
	142	CALL local_stop
	143	ENDIF
	144
	145	!
	146	!-- Read some particle parameters and the size of the particle arrays,
	147	!-- allocate them and read their contents.
	148	READ ( 90 ) bc_par_b, bc_par_lr, bc_par_ns, bc_par_t, &
	149	maximum_number_of_particles, maximum_number_of_tailpoints, &
	150	maximum_number_of_tails, number_of_initial_particles, &
	151	number_of_particles, number_of_particle_groups, &
	152	number_of_tails, particle_groups, time_prel, &
	153	time_write_particle_data, uniform_particles
	154
	155	IF ( number_of_initial_particles /= 0 ) THEN
	156	ALLOCATE( initial_particles(1:number_of_initial_particles) )
	157	READ ( 90 ) initial_particles
	158	ENDIF
	159
	160	ALLOCATE( prt_count(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	161	prt_start_index(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	162	particle_mask(maximum_number_of_particles), &
	163	particles(maximum_number_of_particles) )
	164
	165	READ ( 90 ) prt_count, prt_start_index
	166	READ ( 90 ) particles
	167
	168	IF ( use_particle_tails ) THEN
	169	ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, &
	170	maximum_number_of_tails), &
	171	new_tail_id(maximum_number_of_tails), &
	172	tail_mask(maximum_number_of_tails) )
	173	READ ( 90 ) particle_tail_coordinates
	174	ENDIF
	175
	176	CLOSE ( 90 )
	177
	178	ELSE
	179
	180	!
	181	!-- Allocate particle arrays and set attributes of the initial set of
	182	!-- particles, which can be also periodically released at later times.
	183	!-- Also allocate array for particle tail coordinates, if needed.
	184	ALLOCATE( prt_count(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	185	prt_start_index(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	186	particle_mask(maximum_number_of_particles), &
	187	particles(maximum_number_of_particles) )
	188
	189	!
	190	!-- Initialize all particles with dummy values (otherwise errors may
	191	!-- occur within restart runs). The reason for this is still not clear
	192	!-- and may be presumably caused by errors in the respective user-interface.
	193	particles = particle_type( 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, &
	194	0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, &
[57]	195	0.0, 0, 0, 0, 0 )
[1]	196	particle_groups = particle_groups_type( 0.0, 0.0, 0.0, 0.0 )
	197
	198	!
	199	!-- Set the default particle size used for dvrp plots
	200	IF ( dvrp_psize == 9999999.9 ) dvrp_psize = 0.2 * dx
	201
	202	!
	203	!-- Set values for the density ratio and radius for all particle
	204	!-- groups, if necessary
	205	IF ( density_ratio(1) == 9999999.9 ) density_ratio(1) = 0.0
	206	IF ( radius(1) == 9999999.9 ) radius(1) = 0.0
	207	DO i = 2, number_of_particle_groups
	208	IF ( density_ratio(i) == 9999999.9 ) THEN
	209	density_ratio(i) = density_ratio(i-1)
	210	ENDIF
	211	IF ( radius(i) == 9999999.9 ) radius(i) = radius(i-1)
	212	ENDDO
	213
	214	DO i = 1, number_of_particle_groups
	215	IF ( density_ratio(i) /= 0.0 .AND. radius(i) == 0 ) THEN
	216	IF ( myid == 0 ) THEN
	217	PRINT*, '+++ init_particles: particle group #', i, 'has a', &
	218	'density ratio /= 0 but radius = 0'
	219	ENDIF
	220	CALL local_stop
	221	ENDIF
	222	particle_groups(i)%density_ratio = density_ratio(i)
	223	particle_groups(i)%radius = radius(i)
	224	ENDDO
	225
	226	!
	227	!-- Calculate particle positions and store particle attributes, if
	228	!-- particle is situated on this PE
	229	n = 0
	230
	231	DO i = 1, number_of_particle_groups
	232
	233	pos_z = psb(i)
	234
	235	DO WHILE ( pos_z <= pst(i) )
	236
	237	pos_y = pss(i)
	238
	239	DO WHILE ( pos_y <= psn(i) )
	240
	241	IF ( pos_y >= ( nys - 0.5 ) * dy .AND. &
	242	pos_y < ( nyn + 0.5 ) * dy ) THEN
	243
	244	pos_x = psl(i)
	245
	246	DO WHILE ( pos_x <= psr(i) )
	247
	248	IF ( pos_x >= ( nxl - 0.5 ) * dx .AND. &
	249	pos_x < ( nxr + 0.5 ) * dx ) THEN
	250
	251	DO j = 1, particles_per_point
	252
	253	n = n + 1
	254	IF ( n > maximum_number_of_particles ) THEN
	255	PRINT*,'+++ init_particles: number of initial', &
	256	' particles (', n, ') exceeds'
	257	PRINT*,' maximum_number_of_particles (', &
	258	maximum_number_of_particles, ') on PE ', &
	259	myid
	260	#if defined( __parallel )
	261	CALL MPI_ABORT( comm2d, 9999, ierr )
	262	#else
	263	CALL local_stop
	264	#endif
	265	ENDIF
	266	particles(n)%x = pos_x
	267	particles(n)%y = pos_y
	268	particles(n)%z = pos_z
	269	particles(n)%age = 0.0
[57]	270	particles(n)%age_m = 0.0
[1]	271	particles(n)%dt_sum = 0.0
	272	particles(n)%dvrp_psize = dvrp_psize
	273	particles(n)%e_m = 0.0
	274	particles(n)%speed_x = 0.0
	275	particles(n)%speed_x_sgs = 0.0
	276	particles(n)%speed_y = 0.0
	277	particles(n)%speed_y_sgs = 0.0
	278	particles(n)%speed_z = 0.0
	279	particles(n)%speed_z_sgs = 0.0
	280	particles(n)%origin_x = pos_x
	281	particles(n)%origin_y = pos_y
	282	particles(n)%origin_z = pos_z
	283	particles(n)%radius = particle_groups(i)%radius
	284	particles(n)%weight_factor =initial_weighting_factor
	285	particles(n)%color = 1
	286	particles(n)%group = i
	287	particles(n)%tailpoints = 0
	288	IF ( use_particle_tails .AND. &
	289	MOD( n, skip_particles_for_tail ) == 0 ) THEN
	290	number_of_tails = number_of_tails + 1
	291	!
	292	!-- This is a temporary provisional setting (see
	293	!-- further below!)
	294	particles(n)%tail_id = number_of_tails
	295	ELSE
	296	particles(n)%tail_id = 0
	297	ENDIF
	298
	299	ENDDO
	300
	301	ENDIF
	302
	303	pos_x = pos_x + pdx(i)
	304
	305	ENDDO
	306
	307	ENDIF
	308
	309	pos_y = pos_y + pdy(i)
	310
	311	ENDDO
	312
	313	pos_z = pos_z + pdz(i)
	314
	315	ENDDO
	316
	317	ENDDO
	318
	319	number_of_initial_particles = n
	320	number_of_particles = n
	321
	322	!
	323	!-- Calculate the number of particles and tails of the total domain
	324	#if defined( __parallel )
	325	CALL MPI_ALLREDUCE( number_of_particles, total_number_of_particles, 1, &
[16]	326	MPI_INTEGER, MPI_SUM, comm2d, ierr )
[1]	327	CALL MPI_ALLREDUCE( number_of_tails, total_number_of_tails, 1, &
[16]	328	MPI_INTEGER, MPI_SUM, comm2d, ierr )
[1]	329	#else
	330	total_number_of_particles = number_of_particles
	331	total_number_of_tails = number_of_tails
	332	#endif
	333
	334	!
	335	!-- Set a seed value for the random number generator to be exclusively
	336	!-- used for the particle code. The generated random numbers should be
	337	!-- different on the different PEs.
	338	iran_part = iran_part + myid
	339
	340	!
	341	!-- User modification of initial particles
	342	CALL user_init_particles
	343
	344	!
	345	!-- Store the initial set of particles for release at later times
	346	IF ( number_of_initial_particles /= 0 ) THEN
	347	ALLOCATE( initial_particles(1:number_of_initial_particles) )
	348	initial_particles(1:number_of_initial_particles) = &
	349	particles(1:number_of_initial_particles)
	350	ENDIF
	351
	352	!
	353	!-- Add random fluctuation to particle positions
	354	IF ( random_start_position ) THEN
	355
	356	DO n = 1, number_of_initial_particles
	357	IF ( psl(particles(n)%group) /= psr(particles(n)%group) ) THEN
	358	particles(n)%x = particles(n)%x + &
[106]	359	( random_function( iran_part ) - 0.5 ) * &
[1]	360	pdx(particles(n)%group)
	361	IF ( particles(n)%x <= ( nxl - 0.5 ) * dx ) THEN
	362	particles(n)%x = ( nxl - 0.4999999999 ) * dx
	363	ELSEIF ( particles(n)%x >= ( nxr + 0.5 ) * dx ) THEN
	364	particles(n)%x = ( nxr + 0.4999999999 ) * dx
	365	ENDIF
	366	ENDIF
	367	IF ( pss(particles(n)%group) /= psn(particles(n)%group) ) THEN
	368	particles(n)%y = particles(n)%y + &
[106]	369	( random_function( iran_part ) - 0.5 ) * &
[1]	370	pdy(particles(n)%group)
	371	IF ( particles(n)%y <= ( nys - 0.5 ) * dy ) THEN
	372	particles(n)%y = ( nys - 0.4999999999 ) * dy
	373	ELSEIF ( particles(n)%y >= ( nyn + 0.5 ) * dy ) THEN
	374	particles(n)%y = ( nyn + 0.4999999999 ) * dy
	375	ENDIF
	376	ENDIF
	377	IF ( psb(particles(n)%group) /= pst(particles(n)%group) ) THEN
	378	particles(n)%z = particles(n)%z + &
[106]	379	( random_function( iran_part ) - 0.5 ) * &
[1]	380	pdz(particles(n)%group)
	381	ENDIF
	382	ENDDO
	383	ENDIF
	384
	385	!
	386	!-- Sort particles in the sequence the gridboxes are stored in the memory
	387	CALL sort_particles
	388
	389	!
	390	!-- Open file for statistical informations about particle conditions
	391	IF ( write_particle_statistics ) THEN
	392	CALL check_open( 80 )
	393	WRITE ( 80, 8000 ) current_timestep_number, simulated_time, &
	394	number_of_initial_particles, &
	395	maximum_number_of_particles
	396	CALL close_file( 80 )
	397	ENDIF
	398
	399	!
	400	!-- Check if particles are really uniform in color and radius (dvrp_size)
	401	!-- (uniform_particles is preset TRUE)
	402	IF ( uniform_particles ) THEN
	403	IF ( number_of_initial_particles == 0 ) THEN
	404	uniform_particles_l = .TRUE.
	405	ELSE
	406	n = number_of_initial_particles
	407	IF ( MINVAL( particles(1:n)%dvrp_psize ) == &
	408	MAXVAL( particles(1:n)%dvrp_psize ) .AND. &
	409	MINVAL( particles(1:n)%color ) == &
	410	MAXVAL( particles(1:n)%color ) ) THEN
	411	uniform_particles_l = .TRUE.
	412	ELSE
	413	uniform_particles_l = .FALSE.
	414	ENDIF
	415	ENDIF
	416
	417	#if defined( __parallel )
	418	CALL MPI_ALLREDUCE( uniform_particles_l, uniform_particles, 1, &
	419	MPI_LOGICAL, MPI_LAND, comm2d, ierr )
	420	#else
	421	uniform_particles = uniform_particles_l
	422	#endif
	423
	424	ENDIF
	425
	426	!
	427	!-- Set the beginning of the particle tails and their age
	428	IF ( use_particle_tails ) THEN
	429	!
	430	!-- Choose the maximum number of tails significantly larger than the
	431	!-- one initially required
	432	factor = 10.0
	433	value = number_of_tails
	434	DO WHILE ( value / 10.0 >= 1.0 )
	435	factor = factor * 10.0
	436	value = value / 10.0
	437	ENDDO
	438	maximum_number_of_tails = factor * INT( value )
	439
	440	ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, &
	441	maximum_number_of_tails), &
	442	new_tail_id(maximum_number_of_tails), &
	443	tail_mask(maximum_number_of_tails) )
	444
	445	particle_tail_coordinates = 0.0
	446	minimum_tailpoint_distance = minimum_tailpoint_distance**2
	447	number_of_initial_tails = number_of_tails
	448
	449	nn = 0
	450	DO n = 1, number_of_particles
	451	!
	452	!-- Only for those particles marked above with a provisional tail_id
	453	!-- tails will be created. Particles now get their final tail_id.
	454	IF ( particles(n)%tail_id /= 0 ) THEN
	455
	456	nn = nn + 1
	457	particles(n)%tail_id = nn
	458
	459	particle_tail_coordinates(1,1,nn) = particles(n)%x
	460	particle_tail_coordinates(1,2,nn) = particles(n)%y
	461	particle_tail_coordinates(1,3,nn) = particles(n)%z
	462	particle_tail_coordinates(1,4,nn) = particles(n)%color
	463	particles(n)%tailpoints = 1
	464	IF ( minimum_tailpoint_distance /= 0.0 ) THEN
	465	particle_tail_coordinates(2,1,nn) = particles(n)%x
	466	particle_tail_coordinates(2,2,nn) = particles(n)%y
	467	particle_tail_coordinates(2,3,nn) = particles(n)%z
	468	particle_tail_coordinates(2,4,nn) = particles(n)%color
	469	particle_tail_coordinates(1:2,5,nn) = 0.0
	470	particles(n)%tailpoints = 2
	471	ENDIF
	472
	473	ENDIF
	474	ENDDO
	475	ENDIF
	476
	477	!
	478	!-- Plot initial positions of particles (only if particle advection is
	479	!-- switched on from the beginning of the simulation (t=0))
	480	IF ( particle_advection_start == 0.0 ) CALL data_output_dvrp
	481
	482	ENDIF
	483
	484	!
	485	!-- Check boundary condition and set internal variables
	486	SELECT CASE ( bc_par_b )
	487
	488	CASE ( 'absorb' )
	489	ibc_par_b = 1
	490
	491	CASE ( 'reflect' )
	492	ibc_par_b = 2
	493
	494	CASE DEFAULT
	495	IF ( myid == 0 ) THEN
	496	PRINT*,'+++ init_particles: unknown boundary condition ', &
	497	'bc_par_b = "', TRIM( bc_par_b ), '"'
	498	ENDIF
	499	CALL local_stop
	500
	501	END SELECT
	502	SELECT CASE ( bc_par_t )
	503
	504	CASE ( 'absorb' )
	505	ibc_par_t = 1
	506
	507	CASE ( 'reflect' )
	508	ibc_par_t = 2
	509
	510	CASE DEFAULT
	511	IF ( myid == 0 ) THEN
	512	PRINT*,'+++ init_particles: unknown boundary condition ', &
	513	'bc_par_t = "', TRIM( bc_par_t ), '"'
	514	ENDIF
	515	CALL local_stop
	516
	517	END SELECT
	518	SELECT CASE ( bc_par_lr )
	519
	520	CASE ( 'cyclic' )
	521	ibc_par_lr = 0
	522
	523	CASE ( 'absorb' )
	524	ibc_par_lr = 1
	525
	526	CASE ( 'reflect' )
	527	ibc_par_lr = 2
	528
	529	CASE DEFAULT
	530	IF ( myid == 0 ) THEN
	531	PRINT*,'+++ init_particles: unknown boundary condition ', &
	532	'bc_par_lr = "', TRIM( bc_par_lr ), '"'
	533	ENDIF
	534	CALL local_stop
	535
	536	END SELECT
	537	SELECT CASE ( bc_par_ns )
	538
	539	CASE ( 'cyclic' )
	540	ibc_par_ns = 0
	541
	542	CASE ( 'absorb' )
	543	ibc_par_ns = 1
	544
	545	CASE ( 'reflect' )
	546	ibc_par_ns = 2
	547
	548	CASE DEFAULT
	549	IF ( myid == 0 ) THEN
	550	PRINT*,'+++ init_particles: unknown boundary condition ', &
	551	'bc_par_ns = "', TRIM( bc_par_ns ), '"'
	552	ENDIF
	553	CALL local_stop
	554
	555	END SELECT
	556	!
	557	!-- Formats
	558	8000 FORMAT (I6,1X,F7.2,4X,I6,71X,I6)
	559
	560	END SUBROUTINE init_particles

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