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source: palm/trunk/SOURCE/init_particles.f90 @ 138

Last change on this file since 138 was 117, checked in by raasch, 17 years ago
further small changes added to last revision
Property svn:keywords set to `Id`
File size: 20.5 KB

Rev	Line
[1]	1	SUBROUTINE init_particles
	2
	3	!------------------------------------------------------------------------------!
	4	! Actual revisions:
	5	! -----------------
[117]	6	! Sorting of particles only in case of cloud droplets
[1]	7	!
	8	! Former revisions:
	9	! -----------------
[3]	10	! $Id: init_particles.f90 117 2007-10-11 03:27:59Z letzel $
[39]	11	!
[110]	12	! 106 2007-08-16 14:30:26Z raasch
	13	! variable iran replaced by iran_part
	14	!
[83]	15	! 82 2007-04-16 15:40:52Z raasch
	16	! Preprocessor directives for old systems removed
	17	!
[77]	18	! 70 2007-03-18 23:46:30Z raasch
	19	! displacements for mpi_particle_type changed, age_m initialized,
	20	! particles-package is now part of the default code
	21	!
[39]	22	! 16 2007-02-15 13:16:47Z raasch
	23	! Bugfix: MPI_REAL in MPI_ALLREDUCE replaced by MPI_INTEGER
	24	!
	25	! r4 \| raasch \| 2007-02-13 12:33:16 +0100 (Tue, 13 Feb 2007)
[3]	26	! RCS Log replace by Id keyword, revision history cleaned up
	27	!
[1]	28	! Revision 1.24 2007/02/11 13:00:17 raasch
	29	! Bugfix: allocation of tail_mask and new_tail_id in case of restart-runs
	30	! Bugfix: __ was missing in a cpp-directive
	31	!
	32	! Revision 1.1 1999/11/25 16:22:38 raasch
	33	! Initial revision
	34	!
	35	!
	36	! Description:
	37	! ------------
	38	! This routine initializes a set of particles and their attributes (position,
	39	! radius, ..). Advection of these particles is carried out by advec_particles,
	40	! plotting is done in data_output_dvrp.
	41	!------------------------------------------------------------------------------!
	42
	43	USE arrays_3d
	44	USE control_parameters
	45	USE grid_variables
	46	USE indices
	47	USE particle_attributes
	48	USE pegrid
	49	USE random_function_mod
	50
	51
	52	IMPLICIT NONE
	53
	54	CHARACTER (LEN=10) :: particle_binary_version, version_on_file
	55
	56	INTEGER :: i, j, n, nn
	57	#if defined( __parallel )
	58	INTEGER, DIMENSION(3) :: blocklengths, displacements, types
	59	#endif
	60	LOGICAL :: uniform_particles_l
	61	REAL :: factor, pos_x, pos_y, pos_z, value
	62
	63
	64	#if defined( __parallel )
	65	!
	66	!-- Define MPI derived datatype for FORTRAN datatype particle_type (see module
[82]	67	!-- particle_attributes). Integer length is 4 byte, Real is 8 byte
	68	blocklengths(1) = 19; blocklengths(2) = 4; blocklengths(3) = 1
	69	displacements(1) = 0; displacements(2) = 152; displacements(3) = 168
	70
[1]	71	types(1) = MPI_REAL
	72	types(2) = MPI_INTEGER
	73	types(3) = MPI_UB
	74	CALL MPI_TYPE_STRUCT( 3, blocklengths, displacements, types, &
	75	mpi_particle_type, ierr )
	76	CALL MPI_TYPE_COMMIT( mpi_particle_type, ierr )
	77	#endif
	78
	79	!
	80	!-- Check the number of particle groups.
	81	IF ( number_of_particle_groups > max_number_of_particle_groups ) THEN
	82	PRINT*, '+++ WARNING: init_particles: ', &
	83	'max_number_of_particle_groups =', &
	84	max_number_of_particle_groups
	85	PRINT*, '+++ number_of_particle_groups reset to ', &
	86	max_number_of_particle_groups
	87	number_of_particle_groups = max_number_of_particle_groups
	88	ENDIF
	89
	90	!
	91	!-- Set default start positions, if necessary
	92	IF ( psl(1) == 9999999.9 ) psl(1) = -0.5 * dx
	93	IF ( psr(1) == 9999999.9 ) psr(1) = ( nx + 0.5 ) * dx
	94	IF ( pss(1) == 9999999.9 ) pss(1) = -0.5 * dy
	95	IF ( psn(1) == 9999999.9 ) psn(1) = ( ny + 0.5 ) * dy
	96	IF ( psb(1) == 9999999.9 ) psb(1) = zu(nz/2)
	97	IF ( pst(1) == 9999999.9 ) pst(1) = psb(1)
	98
	99	IF ( pdx(1) == 9999999.9 .OR. pdx(1) == 0.0 ) pdx(1) = dx
	100	IF ( pdy(1) == 9999999.9 .OR. pdy(1) == 0.0 ) pdy(1) = dy
	101	IF ( pdz(1) == 9999999.9 .OR. pdz(1) == 0.0 ) pdz(1) = zu(2) - zu(1)
	102
	103	DO j = 2, number_of_particle_groups
	104	IF ( psl(j) == 9999999.9 ) psl(j) = psl(j-1)
	105	IF ( psr(j) == 9999999.9 ) psr(j) = psr(j-1)
	106	IF ( pss(j) == 9999999.9 ) pss(j) = pss(j-1)
	107	IF ( psn(j) == 9999999.9 ) psn(j) = psn(j-1)
	108	IF ( psb(j) == 9999999.9 ) psb(j) = psb(j-1)
	109	IF ( pst(j) == 9999999.9 ) pst(j) = pst(j-1)
	110	IF ( pdx(j) == 9999999.9 .OR. pdx(j) == 0.0 ) pdx(j) = pdx(j-1)
	111	IF ( pdy(j) == 9999999.9 .OR. pdy(j) == 0.0 ) pdy(j) = pdy(j-1)
	112	IF ( pdz(j) == 9999999.9 .OR. pdz(j) == 0.0 ) pdz(j) = pdz(j-1)
	113	ENDDO
	114
	115	!
	116	!-- For the first model run of a possible job chain initialize the
	117	!-- particles, otherwise read the particle data from file.
	118	IF ( TRIM( initializing_actions ) == 'read_restart_data' &
	119	.AND. read_particles_from_restartfile ) THEN
	120
	121	!
	122	!-- Read particle data from previous model run.
	123	!-- First open the input unit.
	124	IF ( myid_char == '' ) THEN
	125	OPEN ( 90, FILE='PARTICLE_RESTART_DATA_IN'//myid_char, &
	126	FORM='UNFORMATTED' )
	127	ELSE
	128	OPEN ( 90, FILE='PARTICLE_RESTART_DATA_IN/'//myid_char, &
	129	FORM='UNFORMATTED' )
	130	ENDIF
	131
	132	!
	133	!-- First compare the version numbers
	134	READ ( 90 ) version_on_file
	135	particle_binary_version = '3.0'
	136	IF ( TRIM( version_on_file ) /= TRIM( particle_binary_version ) ) THEN
	137	IF ( myid == 0 ) THEN
	138	PRINT*, '+++ init_particles: version mismatch concerning data ', &
	139	'from prior run'
	140	PRINT*, ' version on file = "', TRIM( version_on_file ),&
	141	'"'
	142	PRINT*, ' version in program = "', &
	143	TRIM( particle_binary_version ), '"'
	144	ENDIF
	145	CALL local_stop
	146	ENDIF
	147
	148	!
	149	!-- Read some particle parameters and the size of the particle arrays,
	150	!-- allocate them and read their contents.
	151	READ ( 90 ) bc_par_b, bc_par_lr, bc_par_ns, bc_par_t, &
	152	maximum_number_of_particles, maximum_number_of_tailpoints, &
	153	maximum_number_of_tails, number_of_initial_particles, &
	154	number_of_particles, number_of_particle_groups, &
	155	number_of_tails, particle_groups, time_prel, &
	156	time_write_particle_data, uniform_particles
	157
	158	IF ( number_of_initial_particles /= 0 ) THEN
	159	ALLOCATE( initial_particles(1:number_of_initial_particles) )
	160	READ ( 90 ) initial_particles
	161	ENDIF
	162
	163	ALLOCATE( prt_count(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	164	prt_start_index(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	165	particle_mask(maximum_number_of_particles), &
	166	particles(maximum_number_of_particles) )
	167
	168	READ ( 90 ) prt_count, prt_start_index
	169	READ ( 90 ) particles
	170
	171	IF ( use_particle_tails ) THEN
	172	ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, &
	173	maximum_number_of_tails), &
	174	new_tail_id(maximum_number_of_tails), &
	175	tail_mask(maximum_number_of_tails) )
	176	READ ( 90 ) particle_tail_coordinates
	177	ENDIF
	178
	179	CLOSE ( 90 )
	180
	181	ELSE
	182
	183	!
	184	!-- Allocate particle arrays and set attributes of the initial set of
	185	!-- particles, which can be also periodically released at later times.
	186	!-- Also allocate array for particle tail coordinates, if needed.
	187	ALLOCATE( prt_count(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	188	prt_start_index(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	189	particle_mask(maximum_number_of_particles), &
	190	particles(maximum_number_of_particles) )
	191
	192	!
	193	!-- Initialize all particles with dummy values (otherwise errors may
	194	!-- occur within restart runs). The reason for this is still not clear
	195	!-- and may be presumably caused by errors in the respective user-interface.
	196	particles = particle_type( 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, &
	197	0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, &
[57]	198	0.0, 0, 0, 0, 0 )
[1]	199	particle_groups = particle_groups_type( 0.0, 0.0, 0.0, 0.0 )
	200
	201	!
	202	!-- Set the default particle size used for dvrp plots
	203	IF ( dvrp_psize == 9999999.9 ) dvrp_psize = 0.2 * dx
	204
	205	!
	206	!-- Set values for the density ratio and radius for all particle
	207	!-- groups, if necessary
	208	IF ( density_ratio(1) == 9999999.9 ) density_ratio(1) = 0.0
	209	IF ( radius(1) == 9999999.9 ) radius(1) = 0.0
	210	DO i = 2, number_of_particle_groups
	211	IF ( density_ratio(i) == 9999999.9 ) THEN
	212	density_ratio(i) = density_ratio(i-1)
	213	ENDIF
	214	IF ( radius(i) == 9999999.9 ) radius(i) = radius(i-1)
	215	ENDDO
	216
	217	DO i = 1, number_of_particle_groups
	218	IF ( density_ratio(i) /= 0.0 .AND. radius(i) == 0 ) THEN
	219	IF ( myid == 0 ) THEN
	220	PRINT*, '+++ init_particles: particle group #', i, 'has a', &
	221	'density ratio /= 0 but radius = 0'
	222	ENDIF
	223	CALL local_stop
	224	ENDIF
	225	particle_groups(i)%density_ratio = density_ratio(i)
	226	particle_groups(i)%radius = radius(i)
	227	ENDDO
	228
	229	!
	230	!-- Calculate particle positions and store particle attributes, if
	231	!-- particle is situated on this PE
	232	n = 0
	233
	234	DO i = 1, number_of_particle_groups
	235
	236	pos_z = psb(i)
	237
	238	DO WHILE ( pos_z <= pst(i) )
	239
	240	pos_y = pss(i)
	241
	242	DO WHILE ( pos_y <= psn(i) )
	243
	244	IF ( pos_y >= ( nys - 0.5 ) * dy .AND. &
	245	pos_y < ( nyn + 0.5 ) * dy ) THEN
	246
	247	pos_x = psl(i)
	248
	249	DO WHILE ( pos_x <= psr(i) )
	250
	251	IF ( pos_x >= ( nxl - 0.5 ) * dx .AND. &
	252	pos_x < ( nxr + 0.5 ) * dx ) THEN
	253
	254	DO j = 1, particles_per_point
	255
	256	n = n + 1
	257	IF ( n > maximum_number_of_particles ) THEN
	258	PRINT*,'+++ init_particles: number of initial', &
	259	' particles (', n, ') exceeds'
	260	PRINT*,' maximum_number_of_particles (', &
	261	maximum_number_of_particles, ') on PE ', &
	262	myid
	263	#if defined( __parallel )
	264	CALL MPI_ABORT( comm2d, 9999, ierr )
	265	#else
	266	CALL local_stop
	267	#endif
	268	ENDIF
	269	particles(n)%x = pos_x
	270	particles(n)%y = pos_y
	271	particles(n)%z = pos_z
	272	particles(n)%age = 0.0
[57]	273	particles(n)%age_m = 0.0
[1]	274	particles(n)%dt_sum = 0.0
	275	particles(n)%dvrp_psize = dvrp_psize
	276	particles(n)%e_m = 0.0
	277	particles(n)%speed_x = 0.0
	278	particles(n)%speed_x_sgs = 0.0
	279	particles(n)%speed_y = 0.0
	280	particles(n)%speed_y_sgs = 0.0
	281	particles(n)%speed_z = 0.0
	282	particles(n)%speed_z_sgs = 0.0
	283	particles(n)%origin_x = pos_x
	284	particles(n)%origin_y = pos_y
	285	particles(n)%origin_z = pos_z
	286	particles(n)%radius = particle_groups(i)%radius
	287	particles(n)%weight_factor =initial_weighting_factor
	288	particles(n)%color = 1
	289	particles(n)%group = i
	290	particles(n)%tailpoints = 0
	291	IF ( use_particle_tails .AND. &
	292	MOD( n, skip_particles_for_tail ) == 0 ) THEN
	293	number_of_tails = number_of_tails + 1
	294	!
	295	!-- This is a temporary provisional setting (see
	296	!-- further below!)
	297	particles(n)%tail_id = number_of_tails
	298	ELSE
	299	particles(n)%tail_id = 0
	300	ENDIF
	301
	302	ENDDO
	303
	304	ENDIF
	305
	306	pos_x = pos_x + pdx(i)
	307
	308	ENDDO
	309
	310	ENDIF
	311
	312	pos_y = pos_y + pdy(i)
	313
	314	ENDDO
	315
	316	pos_z = pos_z + pdz(i)
	317
	318	ENDDO
	319
	320	ENDDO
	321
	322	number_of_initial_particles = n
	323	number_of_particles = n
	324
	325	!
	326	!-- Calculate the number of particles and tails of the total domain
	327	#if defined( __parallel )
	328	CALL MPI_ALLREDUCE( number_of_particles, total_number_of_particles, 1, &
[16]	329	MPI_INTEGER, MPI_SUM, comm2d, ierr )
[1]	330	CALL MPI_ALLREDUCE( number_of_tails, total_number_of_tails, 1, &
[16]	331	MPI_INTEGER, MPI_SUM, comm2d, ierr )
[1]	332	#else
	333	total_number_of_particles = number_of_particles
	334	total_number_of_tails = number_of_tails
	335	#endif
	336
	337	!
	338	!-- Set a seed value for the random number generator to be exclusively
	339	!-- used for the particle code. The generated random numbers should be
	340	!-- different on the different PEs.
	341	iran_part = iran_part + myid
	342
	343	!
	344	!-- User modification of initial particles
	345	CALL user_init_particles
	346
	347	!
	348	!-- Store the initial set of particles for release at later times
	349	IF ( number_of_initial_particles /= 0 ) THEN
	350	ALLOCATE( initial_particles(1:number_of_initial_particles) )
	351	initial_particles(1:number_of_initial_particles) = &
	352	particles(1:number_of_initial_particles)
	353	ENDIF
	354
	355	!
	356	!-- Add random fluctuation to particle positions
	357	IF ( random_start_position ) THEN
	358
	359	DO n = 1, number_of_initial_particles
	360	IF ( psl(particles(n)%group) /= psr(particles(n)%group) ) THEN
	361	particles(n)%x = particles(n)%x + &
[106]	362	( random_function( iran_part ) - 0.5 ) * &
[1]	363	pdx(particles(n)%group)
	364	IF ( particles(n)%x <= ( nxl - 0.5 ) * dx ) THEN
	365	particles(n)%x = ( nxl - 0.4999999999 ) * dx
	366	ELSEIF ( particles(n)%x >= ( nxr + 0.5 ) * dx ) THEN
	367	particles(n)%x = ( nxr + 0.4999999999 ) * dx
	368	ENDIF
	369	ENDIF
	370	IF ( pss(particles(n)%group) /= psn(particles(n)%group) ) THEN
	371	particles(n)%y = particles(n)%y + &
[106]	372	( random_function( iran_part ) - 0.5 ) * &
[1]	373	pdy(particles(n)%group)
	374	IF ( particles(n)%y <= ( nys - 0.5 ) * dy ) THEN
	375	particles(n)%y = ( nys - 0.4999999999 ) * dy
	376	ELSEIF ( particles(n)%y >= ( nyn + 0.5 ) * dy ) THEN
	377	particles(n)%y = ( nyn + 0.4999999999 ) * dy
	378	ENDIF
	379	ENDIF
	380	IF ( psb(particles(n)%group) /= pst(particles(n)%group) ) THEN
	381	particles(n)%z = particles(n)%z + &
[106]	382	( random_function( iran_part ) - 0.5 ) * &
[1]	383	pdz(particles(n)%group)
	384	ENDIF
	385	ENDDO
	386	ENDIF
	387
	388	!
[117]	389	!-- Sort particles in the sequence the gridboxes are stored in the memory.
	390	!-- Only required if cloud droplets are used.
	391	IF ( cloud_droplets ) CALL sort_particles
[1]	392
	393	!
	394	!-- Open file for statistical informations about particle conditions
	395	IF ( write_particle_statistics ) THEN
	396	CALL check_open( 80 )
	397	WRITE ( 80, 8000 ) current_timestep_number, simulated_time, &
	398	number_of_initial_particles, &
	399	maximum_number_of_particles
	400	CALL close_file( 80 )
	401	ENDIF
	402
	403	!
	404	!-- Check if particles are really uniform in color and radius (dvrp_size)
	405	!-- (uniform_particles is preset TRUE)
	406	IF ( uniform_particles ) THEN
	407	IF ( number_of_initial_particles == 0 ) THEN
	408	uniform_particles_l = .TRUE.
	409	ELSE
	410	n = number_of_initial_particles
	411	IF ( MINVAL( particles(1:n)%dvrp_psize ) == &
	412	MAXVAL( particles(1:n)%dvrp_psize ) .AND. &
	413	MINVAL( particles(1:n)%color ) == &
	414	MAXVAL( particles(1:n)%color ) ) THEN
	415	uniform_particles_l = .TRUE.
	416	ELSE
	417	uniform_particles_l = .FALSE.
	418	ENDIF
	419	ENDIF
	420
	421	#if defined( __parallel )
	422	CALL MPI_ALLREDUCE( uniform_particles_l, uniform_particles, 1, &
	423	MPI_LOGICAL, MPI_LAND, comm2d, ierr )
	424	#else
	425	uniform_particles = uniform_particles_l
	426	#endif
	427
	428	ENDIF
	429
	430	!
	431	!-- Set the beginning of the particle tails and their age
	432	IF ( use_particle_tails ) THEN
	433	!
	434	!-- Choose the maximum number of tails significantly larger than the
	435	!-- one initially required
	436	factor = 10.0
	437	value = number_of_tails
	438	DO WHILE ( value / 10.0 >= 1.0 )
	439	factor = factor * 10.0
	440	value = value / 10.0
	441	ENDDO
	442	maximum_number_of_tails = factor * INT( value )
	443
	444	ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, &
	445	maximum_number_of_tails), &
	446	new_tail_id(maximum_number_of_tails), &
	447	tail_mask(maximum_number_of_tails) )
	448
	449	particle_tail_coordinates = 0.0
	450	minimum_tailpoint_distance = minimum_tailpoint_distance**2
	451	number_of_initial_tails = number_of_tails
	452
	453	nn = 0
	454	DO n = 1, number_of_particles
	455	!
	456	!-- Only for those particles marked above with a provisional tail_id
	457	!-- tails will be created. Particles now get their final tail_id.
	458	IF ( particles(n)%tail_id /= 0 ) THEN
	459
	460	nn = nn + 1
	461	particles(n)%tail_id = nn
	462
	463	particle_tail_coordinates(1,1,nn) = particles(n)%x
	464	particle_tail_coordinates(1,2,nn) = particles(n)%y
	465	particle_tail_coordinates(1,3,nn) = particles(n)%z
	466	particle_tail_coordinates(1,4,nn) = particles(n)%color
	467	particles(n)%tailpoints = 1
	468	IF ( minimum_tailpoint_distance /= 0.0 ) THEN
	469	particle_tail_coordinates(2,1,nn) = particles(n)%x
	470	particle_tail_coordinates(2,2,nn) = particles(n)%y
	471	particle_tail_coordinates(2,3,nn) = particles(n)%z
	472	particle_tail_coordinates(2,4,nn) = particles(n)%color
	473	particle_tail_coordinates(1:2,5,nn) = 0.0
	474	particles(n)%tailpoints = 2
	475	ENDIF
	476
	477	ENDIF
	478	ENDDO
	479	ENDIF
	480
	481	!
	482	!-- Plot initial positions of particles (only if particle advection is
	483	!-- switched on from the beginning of the simulation (t=0))
	484	IF ( particle_advection_start == 0.0 ) CALL data_output_dvrp
	485
	486	ENDIF
	487
	488	!
	489	!-- Check boundary condition and set internal variables
	490	SELECT CASE ( bc_par_b )
	491
	492	CASE ( 'absorb' )
	493	ibc_par_b = 1
	494
	495	CASE ( 'reflect' )
	496	ibc_par_b = 2
	497
	498	CASE DEFAULT
	499	IF ( myid == 0 ) THEN
	500	PRINT*,'+++ init_particles: unknown boundary condition ', &
	501	'bc_par_b = "', TRIM( bc_par_b ), '"'
	502	ENDIF
	503	CALL local_stop
	504
	505	END SELECT
	506	SELECT CASE ( bc_par_t )
	507
	508	CASE ( 'absorb' )
	509	ibc_par_t = 1
	510
	511	CASE ( 'reflect' )
	512	ibc_par_t = 2
	513
	514	CASE DEFAULT
	515	IF ( myid == 0 ) THEN
	516	PRINT*,'+++ init_particles: unknown boundary condition ', &
	517	'bc_par_t = "', TRIM( bc_par_t ), '"'
	518	ENDIF
	519	CALL local_stop
	520
	521	END SELECT
	522	SELECT CASE ( bc_par_lr )
	523
	524	CASE ( 'cyclic' )
	525	ibc_par_lr = 0
	526
	527	CASE ( 'absorb' )
	528	ibc_par_lr = 1
	529
	530	CASE ( 'reflect' )
	531	ibc_par_lr = 2
	532
	533	CASE DEFAULT
	534	IF ( myid == 0 ) THEN
	535	PRINT*,'+++ init_particles: unknown boundary condition ', &
	536	'bc_par_lr = "', TRIM( bc_par_lr ), '"'
	537	ENDIF
	538	CALL local_stop
	539
	540	END SELECT
	541	SELECT CASE ( bc_par_ns )
	542
	543	CASE ( 'cyclic' )
	544	ibc_par_ns = 0
	545
	546	CASE ( 'absorb' )
	547	ibc_par_ns = 1
	548
	549	CASE ( 'reflect' )
	550	ibc_par_ns = 2
	551
	552	CASE DEFAULT
	553	IF ( myid == 0 ) THEN
	554	PRINT*,'+++ init_particles: unknown boundary condition ', &
	555	'bc_par_ns = "', TRIM( bc_par_ns ), '"'
	556	ENDIF
	557	CALL local_stop
	558
	559	END SELECT
	560	!
	561	!-- Formats
	562	8000 FORMAT (I6,1X,F7.2,4X,I6,71X,I6)
	563
	564	END SUBROUTINE init_particles

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