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source: palm/trunk/SOURCE/init_particles.f90 @ 20

Last change on this file since 20 was 16, checked in by raasch, 18 years ago
bugfixes in advec_particles and init_particles
Property svn:keywords set to `Id`
File size: 20.3 KB

Rev	Line
[1]	1	SUBROUTINE init_particles
	2
	3	!------------------------------------------------------------------------------!
	4	! Actual revisions:
	5	! -----------------
[16]	6	! Bugfix: MPI_REAL in MPI_ALLREDUCE replaced by MPI_INTEGER
[1]	7	!
	8	! Former revisions:
	9	! -----------------
[3]	10	! $Id: init_particles.f90 16 2007-02-15 13:16:47Z raasch $
	11	! RCS Log replace by Id keyword, revision history cleaned up
	12	!
[1]	13	! Revision 1.24 2007/02/11 13:00:17 raasch
	14	! Bugfix: allocation of tail_mask and new_tail_id in case of restart-runs
	15	! Bugfix: __ was missing in a cpp-directive
	16	!
	17	! Revision 1.1 1999/11/25 16:22:38 raasch
	18	! Initial revision
	19	!
	20	!
	21	! Description:
	22	! ------------
	23	! This routine initializes a set of particles and their attributes (position,
	24	! radius, ..). Advection of these particles is carried out by advec_particles,
	25	! plotting is done in data_output_dvrp.
	26	!------------------------------------------------------------------------------!
	27	#if defined( __particles )
	28
	29	USE arrays_3d
	30	USE control_parameters
	31	USE grid_variables
	32	USE indices
	33	USE particle_attributes
	34	USE pegrid
	35	USE random_function_mod
	36
	37
	38	IMPLICIT NONE
	39
	40	CHARACTER (LEN=10) :: particle_binary_version, version_on_file
	41
	42	INTEGER :: i, j, n, nn
	43	#if defined( __parallel )
	44	INTEGER, DIMENSION(3) :: blocklengths, displacements, types
	45	#endif
	46	LOGICAL :: uniform_particles_l
	47	REAL :: factor, pos_x, pos_y, pos_z, value
	48
	49
	50	#if defined( __parallel )
	51	!
	52	!-- Define MPI derived datatype for FORTRAN datatype particle_type (see module
	53	!-- particle_attributes). Integer length is 4 byte, Real is 8 byte (=> total
	54	!-- length 100, nevertheless, 120 bytes are needed on T3E since integer seems
	55	!-- to be 8 bytes long there)
	56	blocklengths(1) = 18; blocklengths(2) = 4; blocklengths(3) = 1
	57	#if defined( __t3eb )
	58	displacements(1) = 0; displacements(2) = 144; displacements(3) = 176
	59	#else
	60	displacements(1) = 0; displacements(2) = 144; displacements(3) = 160
	61	#endif
	62	types(1) = MPI_REAL
	63	types(2) = MPI_INTEGER
	64	types(3) = MPI_UB
	65	CALL MPI_TYPE_STRUCT( 3, blocklengths, displacements, types, &
	66	mpi_particle_type, ierr )
	67	CALL MPI_TYPE_COMMIT( mpi_particle_type, ierr )
	68	#endif
	69
	70	!
	71	!-- Check the number of particle groups.
	72	IF ( number_of_particle_groups > max_number_of_particle_groups ) THEN
	73	PRINT*, '+++ WARNING: init_particles: ', &
	74	'max_number_of_particle_groups =', &
	75	max_number_of_particle_groups
	76	PRINT*, '+++ number_of_particle_groups reset to ', &
	77	max_number_of_particle_groups
	78	number_of_particle_groups = max_number_of_particle_groups
	79	ENDIF
	80
	81	!
	82	!-- Set default start positions, if necessary
	83	IF ( psl(1) == 9999999.9 ) psl(1) = -0.5 * dx
	84	IF ( psr(1) == 9999999.9 ) psr(1) = ( nx + 0.5 ) * dx
	85	IF ( pss(1) == 9999999.9 ) pss(1) = -0.5 * dy
	86	IF ( psn(1) == 9999999.9 ) psn(1) = ( ny + 0.5 ) * dy
	87	IF ( psb(1) == 9999999.9 ) psb(1) = zu(nz/2)
	88	IF ( pst(1) == 9999999.9 ) pst(1) = psb(1)
	89
	90	IF ( pdx(1) == 9999999.9 .OR. pdx(1) == 0.0 ) pdx(1) = dx
	91	IF ( pdy(1) == 9999999.9 .OR. pdy(1) == 0.0 ) pdy(1) = dy
	92	IF ( pdz(1) == 9999999.9 .OR. pdz(1) == 0.0 ) pdz(1) = zu(2) - zu(1)
	93
	94	DO j = 2, number_of_particle_groups
	95	IF ( psl(j) == 9999999.9 ) psl(j) = psl(j-1)
	96	IF ( psr(j) == 9999999.9 ) psr(j) = psr(j-1)
	97	IF ( pss(j) == 9999999.9 ) pss(j) = pss(j-1)
	98	IF ( psn(j) == 9999999.9 ) psn(j) = psn(j-1)
	99	IF ( psb(j) == 9999999.9 ) psb(j) = psb(j-1)
	100	IF ( pst(j) == 9999999.9 ) pst(j) = pst(j-1)
	101	IF ( pdx(j) == 9999999.9 .OR. pdx(j) == 0.0 ) pdx(j) = pdx(j-1)
	102	IF ( pdy(j) == 9999999.9 .OR. pdy(j) == 0.0 ) pdy(j) = pdy(j-1)
	103	IF ( pdz(j) == 9999999.9 .OR. pdz(j) == 0.0 ) pdz(j) = pdz(j-1)
	104	ENDDO
	105
	106	!
	107	!-- For the first model run of a possible job chain initialize the
	108	!-- particles, otherwise read the particle data from file.
	109	IF ( TRIM( initializing_actions ) == 'read_restart_data' &
	110	.AND. read_particles_from_restartfile ) THEN
	111
	112	!
	113	!-- Read particle data from previous model run.
	114	!-- First open the input unit.
	115	IF ( myid_char == '' ) THEN
	116	OPEN ( 90, FILE='PARTICLE_RESTART_DATA_IN'//myid_char, &
	117	FORM='UNFORMATTED' )
	118	ELSE
	119	OPEN ( 90, FILE='PARTICLE_RESTART_DATA_IN/'//myid_char, &
	120	FORM='UNFORMATTED' )
	121	ENDIF
	122
	123	!
	124	!-- First compare the version numbers
	125	READ ( 90 ) version_on_file
	126	particle_binary_version = '3.0'
	127	IF ( TRIM( version_on_file ) /= TRIM( particle_binary_version ) ) THEN
	128	IF ( myid == 0 ) THEN
	129	PRINT*, '+++ init_particles: version mismatch concerning data ', &
	130	'from prior run'
	131	PRINT*, ' version on file = "', TRIM( version_on_file ),&
	132	'"'
	133	PRINT*, ' version in program = "', &
	134	TRIM( particle_binary_version ), '"'
	135	ENDIF
	136	CALL local_stop
	137	ENDIF
	138
	139	!
	140	!-- Read some particle parameters and the size of the particle arrays,
	141	!-- allocate them and read their contents.
	142	READ ( 90 ) bc_par_b, bc_par_lr, bc_par_ns, bc_par_t, &
	143	maximum_number_of_particles, maximum_number_of_tailpoints, &
	144	maximum_number_of_tails, number_of_initial_particles, &
	145	number_of_particles, number_of_particle_groups, &
	146	number_of_tails, particle_groups, time_prel, &
	147	time_write_particle_data, uniform_particles
	148
	149	IF ( number_of_initial_particles /= 0 ) THEN
	150	ALLOCATE( initial_particles(1:number_of_initial_particles) )
	151	READ ( 90 ) initial_particles
	152	ENDIF
	153
	154	ALLOCATE( prt_count(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	155	prt_start_index(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	156	particle_mask(maximum_number_of_particles), &
	157	particles(maximum_number_of_particles) )
	158
	159	READ ( 90 ) prt_count, prt_start_index
	160	READ ( 90 ) particles
	161
	162	IF ( use_particle_tails ) THEN
	163	ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, &
	164	maximum_number_of_tails), &
	165	new_tail_id(maximum_number_of_tails), &
	166	tail_mask(maximum_number_of_tails) )
	167	READ ( 90 ) particle_tail_coordinates
	168	ENDIF
	169
	170	CLOSE ( 90 )
	171
	172	ELSE
	173
	174	!
	175	!-- Allocate particle arrays and set attributes of the initial set of
	176	!-- particles, which can be also periodically released at later times.
	177	!-- Also allocate array for particle tail coordinates, if needed.
	178	ALLOCATE( prt_count(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	179	prt_start_index(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
	180	particle_mask(maximum_number_of_particles), &
	181	particles(maximum_number_of_particles) )
	182
	183	!
	184	!-- Initialize all particles with dummy values (otherwise errors may
	185	!-- occur within restart runs). The reason for this is still not clear
	186	!-- and may be presumably caused by errors in the respective user-interface.
	187	particles = particle_type( 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, &
	188	0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, &
	189	0, 0, 0, 0 )
	190	particle_groups = particle_groups_type( 0.0, 0.0, 0.0, 0.0 )
	191
	192	!
	193	!-- Set the default particle size used for dvrp plots
	194	IF ( dvrp_psize == 9999999.9 ) dvrp_psize = 0.2 * dx
	195
	196	!
	197	!-- Set values for the density ratio and radius for all particle
	198	!-- groups, if necessary
	199	IF ( density_ratio(1) == 9999999.9 ) density_ratio(1) = 0.0
	200	IF ( radius(1) == 9999999.9 ) radius(1) = 0.0
	201	DO i = 2, number_of_particle_groups
	202	IF ( density_ratio(i) == 9999999.9 ) THEN
	203	density_ratio(i) = density_ratio(i-1)
	204	ENDIF
	205	IF ( radius(i) == 9999999.9 ) radius(i) = radius(i-1)
	206	ENDDO
	207
	208	DO i = 1, number_of_particle_groups
	209	IF ( density_ratio(i) /= 0.0 .AND. radius(i) == 0 ) THEN
	210	IF ( myid == 0 ) THEN
	211	PRINT*, '+++ init_particles: particle group #', i, 'has a', &
	212	'density ratio /= 0 but radius = 0'
	213	ENDIF
	214	CALL local_stop
	215	ENDIF
	216	particle_groups(i)%density_ratio = density_ratio(i)
	217	particle_groups(i)%radius = radius(i)
	218	ENDDO
	219
	220	!
	221	!-- Calculate particle positions and store particle attributes, if
	222	!-- particle is situated on this PE
	223	n = 0
	224
	225	DO i = 1, number_of_particle_groups
	226
	227	pos_z = psb(i)
	228
	229	DO WHILE ( pos_z <= pst(i) )
	230
	231	pos_y = pss(i)
	232
	233	DO WHILE ( pos_y <= psn(i) )
	234
	235	IF ( pos_y >= ( nys - 0.5 ) * dy .AND. &
	236	pos_y < ( nyn + 0.5 ) * dy ) THEN
	237
	238	pos_x = psl(i)
	239
	240	DO WHILE ( pos_x <= psr(i) )
	241
	242	IF ( pos_x >= ( nxl - 0.5 ) * dx .AND. &
	243	pos_x < ( nxr + 0.5 ) * dx ) THEN
	244
	245	DO j = 1, particles_per_point
	246
	247	n = n + 1
	248	IF ( n > maximum_number_of_particles ) THEN
	249	PRINT*,'+++ init_particles: number of initial', &
	250	' particles (', n, ') exceeds'
	251	PRINT*,' maximum_number_of_particles (', &
	252	maximum_number_of_particles, ') on PE ', &
	253	myid
	254	#if defined( __parallel )
	255	CALL MPI_ABORT( comm2d, 9999, ierr )
	256	#else
	257	CALL local_stop
	258	#endif
	259	ENDIF
	260	particles(n)%x = pos_x
	261	particles(n)%y = pos_y
	262	particles(n)%z = pos_z
	263	particles(n)%age = 0.0
	264	particles(n)%dt_sum = 0.0
	265	particles(n)%dvrp_psize = dvrp_psize
	266	particles(n)%e_m = 0.0
	267	particles(n)%speed_x = 0.0
	268	particles(n)%speed_x_sgs = 0.0
	269	particles(n)%speed_y = 0.0
	270	particles(n)%speed_y_sgs = 0.0
	271	particles(n)%speed_z = 0.0
	272	particles(n)%speed_z_sgs = 0.0
	273	particles(n)%origin_x = pos_x
	274	particles(n)%origin_y = pos_y
	275	particles(n)%origin_z = pos_z
	276	particles(n)%radius = particle_groups(i)%radius
	277	particles(n)%weight_factor =initial_weighting_factor
	278	particles(n)%color = 1
	279	particles(n)%group = i
	280	particles(n)%tailpoints = 0
	281	IF ( use_particle_tails .AND. &
	282	MOD( n, skip_particles_for_tail ) == 0 ) THEN
	283	number_of_tails = number_of_tails + 1
	284	!
	285	!-- This is a temporary provisional setting (see
	286	!-- further below!)
	287	particles(n)%tail_id = number_of_tails
	288	ELSE
	289	particles(n)%tail_id = 0
	290	ENDIF
	291
	292	ENDDO
	293
	294	ENDIF
	295
	296	pos_x = pos_x + pdx(i)
	297
	298	ENDDO
	299
	300	ENDIF
	301
	302	pos_y = pos_y + pdy(i)
	303
	304	ENDDO
	305
	306	pos_z = pos_z + pdz(i)
	307
	308	ENDDO
	309
	310	ENDDO
	311
	312	number_of_initial_particles = n
	313	number_of_particles = n
	314
	315	!
	316	!-- Calculate the number of particles and tails of the total domain
	317	#if defined( __parallel )
	318	CALL MPI_ALLREDUCE( number_of_particles, total_number_of_particles, 1, &
[16]	319	MPI_INTEGER, MPI_SUM, comm2d, ierr )
[1]	320	CALL MPI_ALLREDUCE( number_of_tails, total_number_of_tails, 1, &
[16]	321	MPI_INTEGER, MPI_SUM, comm2d, ierr )
[1]	322	#else
	323	total_number_of_particles = number_of_particles
	324	total_number_of_tails = number_of_tails
	325	#endif
	326
	327	!
	328	!-- Set a seed value for the random number generator to be exclusively
	329	!-- used for the particle code. The generated random numbers should be
	330	!-- different on the different PEs.
	331	iran_part = iran_part + myid
	332
	333	!
	334	!-- User modification of initial particles
	335	CALL user_init_particles
	336
	337	!
	338	!-- Store the initial set of particles for release at later times
	339	IF ( number_of_initial_particles /= 0 ) THEN
	340	ALLOCATE( initial_particles(1:number_of_initial_particles) )
	341	initial_particles(1:number_of_initial_particles) = &
	342	particles(1:number_of_initial_particles)
	343	ENDIF
	344
	345	!
	346	!-- Add random fluctuation to particle positions
	347	IF ( random_start_position ) THEN
	348
	349	iran = iran + myid ! Random positions should be different on
	350	! different PEs
	351
	352	DO n = 1, number_of_initial_particles
	353	IF ( psl(particles(n)%group) /= psr(particles(n)%group) ) THEN
	354	particles(n)%x = particles(n)%x + &
	355	( random_function( iran ) - 0.5 ) * &
	356	pdx(particles(n)%group)
	357	IF ( particles(n)%x <= ( nxl - 0.5 ) * dx ) THEN
	358	particles(n)%x = ( nxl - 0.4999999999 ) * dx
	359	ELSEIF ( particles(n)%x >= ( nxr + 0.5 ) * dx ) THEN
	360	particles(n)%x = ( nxr + 0.4999999999 ) * dx
	361	ENDIF
	362	ENDIF
	363	IF ( pss(particles(n)%group) /= psn(particles(n)%group) ) THEN
	364	particles(n)%y = particles(n)%y + &
	365	( random_function( iran ) - 0.5 ) * &
	366	pdy(particles(n)%group)
	367	IF ( particles(n)%y <= ( nys - 0.5 ) * dy ) THEN
	368	particles(n)%y = ( nys - 0.4999999999 ) * dy
	369	ELSEIF ( particles(n)%y >= ( nyn + 0.5 ) * dy ) THEN
	370	particles(n)%y = ( nyn + 0.4999999999 ) * dy
	371	ENDIF
	372	ENDIF
	373	IF ( psb(particles(n)%group) /= pst(particles(n)%group) ) THEN
	374	particles(n)%z = particles(n)%z + &
	375	( random_function( iran ) - 0.5 ) * &
	376	pdz(particles(n)%group)
	377	ENDIF
	378	ENDDO
	379	ENDIF
	380
	381	!
	382	!-- Sort particles in the sequence the gridboxes are stored in the memory
	383	CALL sort_particles
	384
	385	!
	386	!-- Open file for statistical informations about particle conditions
	387	IF ( write_particle_statistics ) THEN
	388	CALL check_open( 80 )
	389	WRITE ( 80, 8000 ) current_timestep_number, simulated_time, &
	390	number_of_initial_particles, &
	391	maximum_number_of_particles
	392	CALL close_file( 80 )
	393	ENDIF
	394
	395	!
	396	!-- Check if particles are really uniform in color and radius (dvrp_size)
	397	!-- (uniform_particles is preset TRUE)
	398	IF ( uniform_particles ) THEN
	399	IF ( number_of_initial_particles == 0 ) THEN
	400	uniform_particles_l = .TRUE.
	401	ELSE
	402	n = number_of_initial_particles
	403	IF ( MINVAL( particles(1:n)%dvrp_psize ) == &
	404	MAXVAL( particles(1:n)%dvrp_psize ) .AND. &
	405	MINVAL( particles(1:n)%color ) == &
	406	MAXVAL( particles(1:n)%color ) ) THEN
	407	uniform_particles_l = .TRUE.
	408	ELSE
	409	uniform_particles_l = .FALSE.
	410	ENDIF
	411	ENDIF
	412
	413	#if defined( __parallel )
	414	CALL MPI_ALLREDUCE( uniform_particles_l, uniform_particles, 1, &
	415	MPI_LOGICAL, MPI_LAND, comm2d, ierr )
	416	#else
	417	uniform_particles = uniform_particles_l
	418	#endif
	419
	420	ENDIF
	421
	422	!
	423	!-- Set the beginning of the particle tails and their age
	424	IF ( use_particle_tails ) THEN
	425	!
	426	!-- Choose the maximum number of tails significantly larger than the
	427	!-- one initially required
	428	factor = 10.0
	429	value = number_of_tails
	430	DO WHILE ( value / 10.0 >= 1.0 )
	431	factor = factor * 10.0
	432	value = value / 10.0
	433	ENDDO
	434	maximum_number_of_tails = factor * INT( value )
	435
	436	ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, &
	437	maximum_number_of_tails), &
	438	new_tail_id(maximum_number_of_tails), &
	439	tail_mask(maximum_number_of_tails) )
	440
	441	particle_tail_coordinates = 0.0
	442	minimum_tailpoint_distance = minimum_tailpoint_distance**2
	443	number_of_initial_tails = number_of_tails
	444
	445	nn = 0
	446	DO n = 1, number_of_particles
	447	!
	448	!-- Only for those particles marked above with a provisional tail_id
	449	!-- tails will be created. Particles now get their final tail_id.
	450	IF ( particles(n)%tail_id /= 0 ) THEN
	451
	452	nn = nn + 1
	453	particles(n)%tail_id = nn
	454
	455	particle_tail_coordinates(1,1,nn) = particles(n)%x
	456	particle_tail_coordinates(1,2,nn) = particles(n)%y
	457	particle_tail_coordinates(1,3,nn) = particles(n)%z
	458	particle_tail_coordinates(1,4,nn) = particles(n)%color
	459	particles(n)%tailpoints = 1
	460	IF ( minimum_tailpoint_distance /= 0.0 ) THEN
	461	particle_tail_coordinates(2,1,nn) = particles(n)%x
	462	particle_tail_coordinates(2,2,nn) = particles(n)%y
	463	particle_tail_coordinates(2,3,nn) = particles(n)%z
	464	particle_tail_coordinates(2,4,nn) = particles(n)%color
	465	particle_tail_coordinates(1:2,5,nn) = 0.0
	466	particles(n)%tailpoints = 2
	467	ENDIF
	468
	469	ENDIF
	470	ENDDO
	471	ENDIF
	472
	473	!
	474	!-- Plot initial positions of particles (only if particle advection is
	475	!-- switched on from the beginning of the simulation (t=0))
	476	IF ( particle_advection_start == 0.0 ) CALL data_output_dvrp
	477
	478	ENDIF
	479
	480	!
	481	!-- Check boundary condition and set internal variables
	482	SELECT CASE ( bc_par_b )
	483
	484	CASE ( 'absorb' )
	485	ibc_par_b = 1
	486
	487	CASE ( 'reflect' )
	488	ibc_par_b = 2
	489
	490	CASE DEFAULT
	491	IF ( myid == 0 ) THEN
	492	PRINT*,'+++ init_particles: unknown boundary condition ', &
	493	'bc_par_b = "', TRIM( bc_par_b ), '"'
	494	ENDIF
	495	CALL local_stop
	496
	497	END SELECT
	498	SELECT CASE ( bc_par_t )
	499
	500	CASE ( 'absorb' )
	501	ibc_par_t = 1
	502
	503	CASE ( 'reflect' )
	504	ibc_par_t = 2
	505
	506	CASE DEFAULT
	507	IF ( myid == 0 ) THEN
	508	PRINT*,'+++ init_particles: unknown boundary condition ', &
	509	'bc_par_t = "', TRIM( bc_par_t ), '"'
	510	ENDIF
	511	CALL local_stop
	512
	513	END SELECT
	514	SELECT CASE ( bc_par_lr )
	515
	516	CASE ( 'cyclic' )
	517	ibc_par_lr = 0
	518
	519	CASE ( 'absorb' )
	520	ibc_par_lr = 1
	521
	522	CASE ( 'reflect' )
	523	ibc_par_lr = 2
	524
	525	CASE DEFAULT
	526	IF ( myid == 0 ) THEN
	527	PRINT*,'+++ init_particles: unknown boundary condition ', &
	528	'bc_par_lr = "', TRIM( bc_par_lr ), '"'
	529	ENDIF
	530	CALL local_stop
	531
	532	END SELECT
	533	SELECT CASE ( bc_par_ns )
	534
	535	CASE ( 'cyclic' )
	536	ibc_par_ns = 0
	537
	538	CASE ( 'absorb' )
	539	ibc_par_ns = 1
	540
	541	CASE ( 'reflect' )
	542	ibc_par_ns = 2
	543
	544	CASE DEFAULT
	545	IF ( myid == 0 ) THEN
	546	PRINT*,'+++ init_particles: unknown boundary condition ', &
	547	'bc_par_ns = "', TRIM( bc_par_ns ), '"'
	548	ENDIF
	549	CALL local_stop
	550
	551	END SELECT
	552	!
	553	!-- Formats
	554	8000 FORMAT (I6,1X,F7.2,4X,I6,71X,I6)
	555
	556	#endif
	557	END SUBROUTINE init_particles

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