| 1 | SUBROUTINE init_particles |
|---|
| 2 | |
|---|
| 3 | !------------------------------------------------------------------------------! |
|---|
| 4 | ! Current revisions: |
|---|
| 5 | ! ----------------- |
|---|
| 6 | ! Maximum number of tails is calculated from maximum number of particles and |
|---|
| 7 | ! skip_particles_for_tail, |
|---|
| 8 | ! output of messages replaced by message handling routine |
|---|
| 9 | ! Bugfix: arrays for tails are allocated with a minimum size of 10 tails if |
|---|
| 10 | ! there is no tail initially |
|---|
| 11 | ! |
|---|
| 12 | ! Former revisions: |
|---|
| 13 | ! ----------------- |
|---|
| 14 | ! $Id: init_particles.f90 336 2009-06-10 11:19:35Z raasch $ |
|---|
| 15 | ! |
|---|
| 16 | ! 150 2008-02-29 08:19:58Z raasch |
|---|
| 17 | ! Setting offset_ocean_* needed for calculating vertical indices within ocean |
|---|
| 18 | ! runs |
|---|
| 19 | ! |
|---|
| 20 | ! 117 2007-10-11 03:27:59Z raasch |
|---|
| 21 | ! Sorting of particles only in case of cloud droplets |
|---|
| 22 | ! |
|---|
| 23 | ! 106 2007-08-16 14:30:26Z raasch |
|---|
| 24 | ! variable iran replaced by iran_part |
|---|
| 25 | ! |
|---|
| 26 | ! 82 2007-04-16 15:40:52Z raasch |
|---|
| 27 | ! Preprocessor directives for old systems removed |
|---|
| 28 | ! |
|---|
| 29 | ! 70 2007-03-18 23:46:30Z raasch |
|---|
| 30 | ! displacements for mpi_particle_type changed, age_m initialized, |
|---|
| 31 | ! particles-package is now part of the default code |
|---|
| 32 | ! |
|---|
| 33 | ! 16 2007-02-15 13:16:47Z raasch |
|---|
| 34 | ! Bugfix: MPI_REAL in MPI_ALLREDUCE replaced by MPI_INTEGER |
|---|
| 35 | ! |
|---|
| 36 | ! r4 | raasch | 2007-02-13 12:33:16 +0100 (Tue, 13 Feb 2007) |
|---|
| 37 | ! RCS Log replace by Id keyword, revision history cleaned up |
|---|
| 38 | ! |
|---|
| 39 | ! Revision 1.24 2007/02/11 13:00:17 raasch |
|---|
| 40 | ! Bugfix: allocation of tail_mask and new_tail_id in case of restart-runs |
|---|
| 41 | ! Bugfix: __ was missing in a cpp-directive |
|---|
| 42 | ! |
|---|
| 43 | ! Revision 1.1 1999/11/25 16:22:38 raasch |
|---|
| 44 | ! Initial revision |
|---|
| 45 | ! |
|---|
| 46 | ! |
|---|
| 47 | ! Description: |
|---|
| 48 | ! ------------ |
|---|
| 49 | ! This routine initializes a set of particles and their attributes (position, |
|---|
| 50 | ! radius, ..). Advection of these particles is carried out by advec_particles, |
|---|
| 51 | ! plotting is done in data_output_dvrp. |
|---|
| 52 | !------------------------------------------------------------------------------! |
|---|
| 53 | |
|---|
| 54 | USE arrays_3d |
|---|
| 55 | USE control_parameters |
|---|
| 56 | USE dvrp_variables |
|---|
| 57 | USE grid_variables |
|---|
| 58 | USE indices |
|---|
| 59 | USE particle_attributes |
|---|
| 60 | USE pegrid |
|---|
| 61 | USE random_function_mod |
|---|
| 62 | |
|---|
| 63 | |
|---|
| 64 | IMPLICIT NONE |
|---|
| 65 | |
|---|
| 66 | CHARACTER (LEN=10) :: particle_binary_version, version_on_file |
|---|
| 67 | |
|---|
| 68 | INTEGER :: i, j, n, nn |
|---|
| 69 | #if defined( __parallel ) |
|---|
| 70 | INTEGER, DIMENSION(3) :: blocklengths, displacements, types |
|---|
| 71 | #endif |
|---|
| 72 | LOGICAL :: uniform_particles_l |
|---|
| 73 | REAL :: factor, pos_x, pos_y, pos_z, value |
|---|
| 74 | |
|---|
| 75 | |
|---|
| 76 | #if defined( __parallel ) |
|---|
| 77 | ! |
|---|
| 78 | !-- Define MPI derived datatype for FORTRAN datatype particle_type (see module |
|---|
| 79 | !-- particle_attributes). Integer length is 4 byte, Real is 8 byte |
|---|
| 80 | blocklengths(1) = 19; blocklengths(2) = 4; blocklengths(3) = 1 |
|---|
| 81 | displacements(1) = 0; displacements(2) = 152; displacements(3) = 168 |
|---|
| 82 | |
|---|
| 83 | types(1) = MPI_REAL |
|---|
| 84 | types(2) = MPI_INTEGER |
|---|
| 85 | types(3) = MPI_UB |
|---|
| 86 | CALL MPI_TYPE_STRUCT( 3, blocklengths, displacements, types, & |
|---|
| 87 | mpi_particle_type, ierr ) |
|---|
| 88 | CALL MPI_TYPE_COMMIT( mpi_particle_type, ierr ) |
|---|
| 89 | #endif |
|---|
| 90 | |
|---|
| 91 | ! |
|---|
| 92 | !-- In case of oceans runs, the vertical index calculations need an offset, |
|---|
| 93 | !-- because otherwise the k indices will become negative |
|---|
| 94 | IF ( ocean ) THEN |
|---|
| 95 | offset_ocean_nzt = nzt |
|---|
| 96 | offset_ocean_nzt_m1 = nzt - 1 |
|---|
| 97 | ENDIF |
|---|
| 98 | |
|---|
| 99 | |
|---|
| 100 | ! |
|---|
| 101 | !-- Check the number of particle groups. |
|---|
| 102 | IF ( number_of_particle_groups > max_number_of_particle_groups ) THEN |
|---|
| 103 | WRITE( message_string, * ) 'max_number_of_particle_groups =', & |
|---|
| 104 | max_number_of_particle_groups , & |
|---|
| 105 | '&number_of_particle_groups reset to ', & |
|---|
| 106 | max_number_of_particle_groups |
|---|
| 107 | CALL message( 'init_particles', 'PA0213', 0, 1, 0, 6, 0 ) |
|---|
| 108 | number_of_particle_groups = max_number_of_particle_groups |
|---|
| 109 | ENDIF |
|---|
| 110 | |
|---|
| 111 | ! |
|---|
| 112 | !-- Set default start positions, if necessary |
|---|
| 113 | IF ( psl(1) == 9999999.9 ) psl(1) = -0.5 * dx |
|---|
| 114 | IF ( psr(1) == 9999999.9 ) psr(1) = ( nx + 0.5 ) * dx |
|---|
| 115 | IF ( pss(1) == 9999999.9 ) pss(1) = -0.5 * dy |
|---|
| 116 | IF ( psn(1) == 9999999.9 ) psn(1) = ( ny + 0.5 ) * dy |
|---|
| 117 | IF ( psb(1) == 9999999.9 ) psb(1) = zu(nz/2) |
|---|
| 118 | IF ( pst(1) == 9999999.9 ) pst(1) = psb(1) |
|---|
| 119 | |
|---|
| 120 | IF ( pdx(1) == 9999999.9 .OR. pdx(1) == 0.0 ) pdx(1) = dx |
|---|
| 121 | IF ( pdy(1) == 9999999.9 .OR. pdy(1) == 0.0 ) pdy(1) = dy |
|---|
| 122 | IF ( pdz(1) == 9999999.9 .OR. pdz(1) == 0.0 ) pdz(1) = zu(2) - zu(1) |
|---|
| 123 | |
|---|
| 124 | DO j = 2, number_of_particle_groups |
|---|
| 125 | IF ( psl(j) == 9999999.9 ) psl(j) = psl(j-1) |
|---|
| 126 | IF ( psr(j) == 9999999.9 ) psr(j) = psr(j-1) |
|---|
| 127 | IF ( pss(j) == 9999999.9 ) pss(j) = pss(j-1) |
|---|
| 128 | IF ( psn(j) == 9999999.9 ) psn(j) = psn(j-1) |
|---|
| 129 | IF ( psb(j) == 9999999.9 ) psb(j) = psb(j-1) |
|---|
| 130 | IF ( pst(j) == 9999999.9 ) pst(j) = pst(j-1) |
|---|
| 131 | IF ( pdx(j) == 9999999.9 .OR. pdx(j) == 0.0 ) pdx(j) = pdx(j-1) |
|---|
| 132 | IF ( pdy(j) == 9999999.9 .OR. pdy(j) == 0.0 ) pdy(j) = pdy(j-1) |
|---|
| 133 | IF ( pdz(j) == 9999999.9 .OR. pdz(j) == 0.0 ) pdz(j) = pdz(j-1) |
|---|
| 134 | ENDDO |
|---|
| 135 | |
|---|
| 136 | ! |
|---|
| 137 | !-- For the first model run of a possible job chain initialize the |
|---|
| 138 | !-- particles, otherwise read the particle data from file. |
|---|
| 139 | IF ( TRIM( initializing_actions ) == 'read_restart_data' & |
|---|
| 140 | .AND. read_particles_from_restartfile ) THEN |
|---|
| 141 | |
|---|
| 142 | ! |
|---|
| 143 | !-- Read particle data from previous model run. |
|---|
| 144 | !-- First open the input unit. |
|---|
| 145 | IF ( myid_char == '' ) THEN |
|---|
| 146 | OPEN ( 90, FILE='PARTICLE_RESTART_DATA_IN'//myid_char, & |
|---|
| 147 | FORM='UNFORMATTED' ) |
|---|
| 148 | ELSE |
|---|
| 149 | OPEN ( 90, FILE='PARTICLE_RESTART_DATA_IN/'//myid_char, & |
|---|
| 150 | FORM='UNFORMATTED' ) |
|---|
| 151 | ENDIF |
|---|
| 152 | |
|---|
| 153 | ! |
|---|
| 154 | !-- First compare the version numbers |
|---|
| 155 | READ ( 90 ) version_on_file |
|---|
| 156 | particle_binary_version = '3.0' |
|---|
| 157 | IF ( TRIM( version_on_file ) /= TRIM( particle_binary_version ) ) THEN |
|---|
| 158 | message_string = 'version mismatch concerning data from prior ' // & |
|---|
| 159 | 'run &version on file = "' // & |
|---|
| 160 | TRIM( version_on_file ) // & |
|---|
| 161 | '&version in program = "' // & |
|---|
| 162 | TRIM( particle_binary_version ) // '"' |
|---|
| 163 | CALL message( 'init_particles', 'PA0214', 1, 2, 0, 6, 0 ) |
|---|
| 164 | ENDIF |
|---|
| 165 | |
|---|
| 166 | ! |
|---|
| 167 | !-- Read some particle parameters and the size of the particle arrays, |
|---|
| 168 | !-- allocate them and read their contents. |
|---|
| 169 | READ ( 90 ) bc_par_b, bc_par_lr, bc_par_ns, bc_par_t, & |
|---|
| 170 | maximum_number_of_particles, maximum_number_of_tailpoints, & |
|---|
| 171 | maximum_number_of_tails, number_of_initial_particles, & |
|---|
| 172 | number_of_particles, number_of_particle_groups, & |
|---|
| 173 | number_of_tails, particle_groups, time_prel, & |
|---|
| 174 | time_write_particle_data, uniform_particles |
|---|
| 175 | |
|---|
| 176 | IF ( number_of_initial_particles /= 0 ) THEN |
|---|
| 177 | ALLOCATE( initial_particles(1:number_of_initial_particles) ) |
|---|
| 178 | READ ( 90 ) initial_particles |
|---|
| 179 | ENDIF |
|---|
| 180 | |
|---|
| 181 | ALLOCATE( prt_count(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), & |
|---|
| 182 | prt_start_index(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), & |
|---|
| 183 | particle_mask(maximum_number_of_particles), & |
|---|
| 184 | particles(maximum_number_of_particles) ) |
|---|
| 185 | |
|---|
| 186 | READ ( 90 ) prt_count, prt_start_index |
|---|
| 187 | READ ( 90 ) particles |
|---|
| 188 | |
|---|
| 189 | IF ( use_particle_tails ) THEN |
|---|
| 190 | ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, & |
|---|
| 191 | maximum_number_of_tails), & |
|---|
| 192 | new_tail_id(maximum_number_of_tails), & |
|---|
| 193 | tail_mask(maximum_number_of_tails) ) |
|---|
| 194 | READ ( 90 ) particle_tail_coordinates |
|---|
| 195 | ENDIF |
|---|
| 196 | |
|---|
| 197 | CLOSE ( 90 ) |
|---|
| 198 | |
|---|
| 199 | ELSE |
|---|
| 200 | |
|---|
| 201 | ! |
|---|
| 202 | !-- Allocate particle arrays and set attributes of the initial set of |
|---|
| 203 | !-- particles, which can be also periodically released at later times. |
|---|
| 204 | !-- Also allocate array for particle tail coordinates, if needed. |
|---|
| 205 | ALLOCATE( prt_count(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), & |
|---|
| 206 | prt_start_index(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), & |
|---|
| 207 | particle_mask(maximum_number_of_particles), & |
|---|
| 208 | particles(maximum_number_of_particles) ) |
|---|
| 209 | |
|---|
| 210 | ! |
|---|
| 211 | !-- Initialize all particles with dummy values (otherwise errors may |
|---|
| 212 | !-- occur within restart runs). The reason for this is still not clear |
|---|
| 213 | !-- and may be presumably caused by errors in the respective user-interface. |
|---|
| 214 | particles = particle_type( 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, & |
|---|
| 215 | 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, & |
|---|
| 216 | 0.0, 0, 0, 0, 0 ) |
|---|
| 217 | particle_groups = particle_groups_type( 0.0, 0.0, 0.0, 0.0 ) |
|---|
| 218 | |
|---|
| 219 | ! |
|---|
| 220 | !-- Set the default particle size used for dvrp plots |
|---|
| 221 | IF ( dvrp_psize == 9999999.9 ) dvrp_psize = 0.2 * dx |
|---|
| 222 | |
|---|
| 223 | ! |
|---|
| 224 | !-- Set values for the density ratio and radius for all particle |
|---|
| 225 | !-- groups, if necessary |
|---|
| 226 | IF ( density_ratio(1) == 9999999.9 ) density_ratio(1) = 0.0 |
|---|
| 227 | IF ( radius(1) == 9999999.9 ) radius(1) = 0.0 |
|---|
| 228 | DO i = 2, number_of_particle_groups |
|---|
| 229 | IF ( density_ratio(i) == 9999999.9 ) THEN |
|---|
| 230 | density_ratio(i) = density_ratio(i-1) |
|---|
| 231 | ENDIF |
|---|
| 232 | IF ( radius(i) == 9999999.9 ) radius(i) = radius(i-1) |
|---|
| 233 | ENDDO |
|---|
| 234 | |
|---|
| 235 | DO i = 1, number_of_particle_groups |
|---|
| 236 | IF ( density_ratio(i) /= 0.0 .AND. radius(i) == 0 ) THEN |
|---|
| 237 | WRITE( message_string, * ) 'particle group #', i, 'has a', & |
|---|
| 238 | 'density ratio /= 0 but radius = 0' |
|---|
| 239 | CALL message( 'init_particles', 'PA0215', 1, 2, 0, 6, 0 ) |
|---|
| 240 | ENDIF |
|---|
| 241 | particle_groups(i)%density_ratio = density_ratio(i) |
|---|
| 242 | particle_groups(i)%radius = radius(i) |
|---|
| 243 | ENDDO |
|---|
| 244 | |
|---|
| 245 | ! |
|---|
| 246 | !-- Calculate particle positions and store particle attributes, if |
|---|
| 247 | !-- particle is situated on this PE |
|---|
| 248 | n = 0 |
|---|
| 249 | |
|---|
| 250 | DO i = 1, number_of_particle_groups |
|---|
| 251 | |
|---|
| 252 | pos_z = psb(i) |
|---|
| 253 | |
|---|
| 254 | DO WHILE ( pos_z <= pst(i) ) |
|---|
| 255 | |
|---|
| 256 | pos_y = pss(i) |
|---|
| 257 | |
|---|
| 258 | DO WHILE ( pos_y <= psn(i) ) |
|---|
| 259 | |
|---|
| 260 | IF ( pos_y >= ( nys - 0.5 ) * dy .AND. & |
|---|
| 261 | pos_y < ( nyn + 0.5 ) * dy ) THEN |
|---|
| 262 | |
|---|
| 263 | pos_x = psl(i) |
|---|
| 264 | |
|---|
| 265 | DO WHILE ( pos_x <= psr(i) ) |
|---|
| 266 | |
|---|
| 267 | IF ( pos_x >= ( nxl - 0.5 ) * dx .AND. & |
|---|
| 268 | pos_x < ( nxr + 0.5 ) * dx ) THEN |
|---|
| 269 | |
|---|
| 270 | DO j = 1, particles_per_point |
|---|
| 271 | |
|---|
| 272 | n = n + 1 |
|---|
| 273 | IF ( n > maximum_number_of_particles ) THEN |
|---|
| 274 | WRITE( message_string, * ) 'number of initial', & |
|---|
| 275 | 'particles (', n, ') exceeds', & |
|---|
| 276 | '&maximum_number_of_particles (', & |
|---|
| 277 | maximum_number_of_particles, ') on PE ', & |
|---|
| 278 | myid |
|---|
| 279 | CALL message( 'init_particles', 'PA0216', & |
|---|
| 280 | 2, 2, -1, 6, 1 ) |
|---|
| 281 | ENDIF |
|---|
| 282 | particles(n)%x = pos_x |
|---|
| 283 | particles(n)%y = pos_y |
|---|
| 284 | particles(n)%z = pos_z |
|---|
| 285 | particles(n)%age = 0.0 |
|---|
| 286 | particles(n)%age_m = 0.0 |
|---|
| 287 | particles(n)%dt_sum = 0.0 |
|---|
| 288 | particles(n)%dvrp_psize = dvrp_psize |
|---|
| 289 | particles(n)%e_m = 0.0 |
|---|
| 290 | particles(n)%speed_x = 0.0 |
|---|
| 291 | particles(n)%speed_x_sgs = 0.0 |
|---|
| 292 | particles(n)%speed_y = 0.0 |
|---|
| 293 | particles(n)%speed_y_sgs = 0.0 |
|---|
| 294 | particles(n)%speed_z = 0.0 |
|---|
| 295 | particles(n)%speed_z_sgs = 0.0 |
|---|
| 296 | particles(n)%origin_x = pos_x |
|---|
| 297 | particles(n)%origin_y = pos_y |
|---|
| 298 | particles(n)%origin_z = pos_z |
|---|
| 299 | particles(n)%radius = particle_groups(i)%radius |
|---|
| 300 | particles(n)%weight_factor =initial_weighting_factor |
|---|
| 301 | particles(n)%color = 1 |
|---|
| 302 | particles(n)%group = i |
|---|
| 303 | particles(n)%tailpoints = 0 |
|---|
| 304 | IF ( use_particle_tails .AND. & |
|---|
| 305 | MOD( n, skip_particles_for_tail ) == 0 ) THEN |
|---|
| 306 | number_of_tails = number_of_tails + 1 |
|---|
| 307 | ! |
|---|
| 308 | !-- This is a temporary provisional setting (see |
|---|
| 309 | !-- further below!) |
|---|
| 310 | particles(n)%tail_id = number_of_tails |
|---|
| 311 | ELSE |
|---|
| 312 | particles(n)%tail_id = 0 |
|---|
| 313 | ENDIF |
|---|
| 314 | |
|---|
| 315 | ENDDO |
|---|
| 316 | |
|---|
| 317 | ENDIF |
|---|
| 318 | |
|---|
| 319 | pos_x = pos_x + pdx(i) |
|---|
| 320 | |
|---|
| 321 | ENDDO |
|---|
| 322 | |
|---|
| 323 | ENDIF |
|---|
| 324 | |
|---|
| 325 | pos_y = pos_y + pdy(i) |
|---|
| 326 | |
|---|
| 327 | ENDDO |
|---|
| 328 | |
|---|
| 329 | pos_z = pos_z + pdz(i) |
|---|
| 330 | |
|---|
| 331 | ENDDO |
|---|
| 332 | |
|---|
| 333 | ENDDO |
|---|
| 334 | |
|---|
| 335 | number_of_initial_particles = n |
|---|
| 336 | number_of_particles = n |
|---|
| 337 | |
|---|
| 338 | ! |
|---|
| 339 | !-- Calculate the number of particles and tails of the total domain |
|---|
| 340 | #if defined( __parallel ) |
|---|
| 341 | CALL MPI_ALLREDUCE( number_of_particles, total_number_of_particles, 1, & |
|---|
| 342 | MPI_INTEGER, MPI_SUM, comm2d, ierr ) |
|---|
| 343 | CALL MPI_ALLREDUCE( number_of_tails, total_number_of_tails, 1, & |
|---|
| 344 | MPI_INTEGER, MPI_SUM, comm2d, ierr ) |
|---|
| 345 | #else |
|---|
| 346 | total_number_of_particles = number_of_particles |
|---|
| 347 | total_number_of_tails = number_of_tails |
|---|
| 348 | #endif |
|---|
| 349 | |
|---|
| 350 | ! |
|---|
| 351 | !-- Set a seed value for the random number generator to be exclusively |
|---|
| 352 | !-- used for the particle code. The generated random numbers should be |
|---|
| 353 | !-- different on the different PEs. |
|---|
| 354 | iran_part = iran_part + myid |
|---|
| 355 | |
|---|
| 356 | ! |
|---|
| 357 | !-- User modification of initial particles |
|---|
| 358 | CALL user_init_particles |
|---|
| 359 | |
|---|
| 360 | ! |
|---|
| 361 | !-- Store the initial set of particles for release at later times |
|---|
| 362 | IF ( number_of_initial_particles /= 0 ) THEN |
|---|
| 363 | ALLOCATE( initial_particles(1:number_of_initial_particles) ) |
|---|
| 364 | initial_particles(1:number_of_initial_particles) = & |
|---|
| 365 | particles(1:number_of_initial_particles) |
|---|
| 366 | ENDIF |
|---|
| 367 | |
|---|
| 368 | ! |
|---|
| 369 | !-- Add random fluctuation to particle positions |
|---|
| 370 | IF ( random_start_position ) THEN |
|---|
| 371 | |
|---|
| 372 | DO n = 1, number_of_initial_particles |
|---|
| 373 | IF ( psl(particles(n)%group) /= psr(particles(n)%group) ) THEN |
|---|
| 374 | particles(n)%x = particles(n)%x + & |
|---|
| 375 | ( random_function( iran_part ) - 0.5 ) * & |
|---|
| 376 | pdx(particles(n)%group) |
|---|
| 377 | IF ( particles(n)%x <= ( nxl - 0.5 ) * dx ) THEN |
|---|
| 378 | particles(n)%x = ( nxl - 0.4999999999 ) * dx |
|---|
| 379 | ELSEIF ( particles(n)%x >= ( nxr + 0.5 ) * dx ) THEN |
|---|
| 380 | particles(n)%x = ( nxr + 0.4999999999 ) * dx |
|---|
| 381 | ENDIF |
|---|
| 382 | ENDIF |
|---|
| 383 | IF ( pss(particles(n)%group) /= psn(particles(n)%group) ) THEN |
|---|
| 384 | particles(n)%y = particles(n)%y + & |
|---|
| 385 | ( random_function( iran_part ) - 0.5 ) * & |
|---|
| 386 | pdy(particles(n)%group) |
|---|
| 387 | IF ( particles(n)%y <= ( nys - 0.5 ) * dy ) THEN |
|---|
| 388 | particles(n)%y = ( nys - 0.4999999999 ) * dy |
|---|
| 389 | ELSEIF ( particles(n)%y >= ( nyn + 0.5 ) * dy ) THEN |
|---|
| 390 | particles(n)%y = ( nyn + 0.4999999999 ) * dy |
|---|
| 391 | ENDIF |
|---|
| 392 | ENDIF |
|---|
| 393 | IF ( psb(particles(n)%group) /= pst(particles(n)%group) ) THEN |
|---|
| 394 | particles(n)%z = particles(n)%z + & |
|---|
| 395 | ( random_function( iran_part ) - 0.5 ) * & |
|---|
| 396 | pdz(particles(n)%group) |
|---|
| 397 | ENDIF |
|---|
| 398 | ENDDO |
|---|
| 399 | ENDIF |
|---|
| 400 | |
|---|
| 401 | ! |
|---|
| 402 | !-- Sort particles in the sequence the gridboxes are stored in the memory. |
|---|
| 403 | !-- Only required if cloud droplets are used. |
|---|
| 404 | IF ( cloud_droplets ) CALL sort_particles |
|---|
| 405 | |
|---|
| 406 | ! |
|---|
| 407 | !-- Open file for statistical informations about particle conditions |
|---|
| 408 | IF ( write_particle_statistics ) THEN |
|---|
| 409 | CALL check_open( 80 ) |
|---|
| 410 | WRITE ( 80, 8000 ) current_timestep_number, simulated_time, & |
|---|
| 411 | number_of_initial_particles, & |
|---|
| 412 | maximum_number_of_particles |
|---|
| 413 | CALL close_file( 80 ) |
|---|
| 414 | ENDIF |
|---|
| 415 | |
|---|
| 416 | ! |
|---|
| 417 | !-- Check if particles are really uniform in color and radius (dvrp_size) |
|---|
| 418 | !-- (uniform_particles is preset TRUE) |
|---|
| 419 | IF ( uniform_particles ) THEN |
|---|
| 420 | IF ( number_of_initial_particles == 0 ) THEN |
|---|
| 421 | uniform_particles_l = .TRUE. |
|---|
| 422 | ELSE |
|---|
| 423 | n = number_of_initial_particles |
|---|
| 424 | IF ( MINVAL( particles(1:n)%dvrp_psize ) == & |
|---|
| 425 | MAXVAL( particles(1:n)%dvrp_psize ) .AND. & |
|---|
| 426 | MINVAL( particles(1:n)%color ) == & |
|---|
| 427 | MAXVAL( particles(1:n)%color ) ) THEN |
|---|
| 428 | uniform_particles_l = .TRUE. |
|---|
| 429 | ELSE |
|---|
| 430 | uniform_particles_l = .FALSE. |
|---|
| 431 | ENDIF |
|---|
| 432 | ENDIF |
|---|
| 433 | |
|---|
| 434 | #if defined( __parallel ) |
|---|
| 435 | CALL MPI_ALLREDUCE( uniform_particles_l, uniform_particles, 1, & |
|---|
| 436 | MPI_LOGICAL, MPI_LAND, comm2d, ierr ) |
|---|
| 437 | #else |
|---|
| 438 | uniform_particles = uniform_particles_l |
|---|
| 439 | #endif |
|---|
| 440 | |
|---|
| 441 | ENDIF |
|---|
| 442 | |
|---|
| 443 | ! |
|---|
| 444 | !-- Particles will probably become none-uniform, if their size and color |
|---|
| 445 | !-- will be determined by flow variables |
|---|
| 446 | IF ( particle_color /= 'none' .OR. particle_dvrpsize /= 'none' ) THEN |
|---|
| 447 | uniform_particles = .FALSE. |
|---|
| 448 | ENDIF |
|---|
| 449 | |
|---|
| 450 | ! |
|---|
| 451 | !-- Set the beginning of the particle tails and their age |
|---|
| 452 | IF ( use_particle_tails ) THEN |
|---|
| 453 | ! |
|---|
| 454 | !-- Choose the maximum number of tails with respect to the maximum number |
|---|
| 455 | !-- of particles and skip_particles_for_tail |
|---|
| 456 | maximum_number_of_tails = maximum_number_of_particles / & |
|---|
| 457 | skip_particles_for_tail |
|---|
| 458 | |
|---|
| 459 | ! |
|---|
| 460 | !-- Create a minimum number of tails in case that there is no tail |
|---|
| 461 | !-- initially (otherwise, index errors will occur when adressing the |
|---|
| 462 | !-- arrays below) |
|---|
| 463 | IF ( maximum_number_of_tails == 0 ) maximum_number_of_tails = 10 |
|---|
| 464 | |
|---|
| 465 | ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, & |
|---|
| 466 | maximum_number_of_tails), & |
|---|
| 467 | new_tail_id(maximum_number_of_tails), & |
|---|
| 468 | tail_mask(maximum_number_of_tails) ) |
|---|
| 469 | |
|---|
| 470 | particle_tail_coordinates = 0.0 |
|---|
| 471 | minimum_tailpoint_distance = minimum_tailpoint_distance**2 |
|---|
| 472 | number_of_initial_tails = number_of_tails |
|---|
| 473 | |
|---|
| 474 | nn = 0 |
|---|
| 475 | DO n = 1, number_of_particles |
|---|
| 476 | ! |
|---|
| 477 | !-- Only for those particles marked above with a provisional tail_id |
|---|
| 478 | !-- tails will be created. Particles now get their final tail_id. |
|---|
| 479 | IF ( particles(n)%tail_id /= 0 ) THEN |
|---|
| 480 | |
|---|
| 481 | nn = nn + 1 |
|---|
| 482 | particles(n)%tail_id = nn |
|---|
| 483 | |
|---|
| 484 | particle_tail_coordinates(1,1,nn) = particles(n)%x |
|---|
| 485 | particle_tail_coordinates(1,2,nn) = particles(n)%y |
|---|
| 486 | particle_tail_coordinates(1,3,nn) = particles(n)%z |
|---|
| 487 | particle_tail_coordinates(1,4,nn) = particles(n)%color |
|---|
| 488 | particles(n)%tailpoints = 1 |
|---|
| 489 | IF ( minimum_tailpoint_distance /= 0.0 ) THEN |
|---|
| 490 | particle_tail_coordinates(2,1,nn) = particles(n)%x |
|---|
| 491 | particle_tail_coordinates(2,2,nn) = particles(n)%y |
|---|
| 492 | particle_tail_coordinates(2,3,nn) = particles(n)%z |
|---|
| 493 | particle_tail_coordinates(2,4,nn) = particles(n)%color |
|---|
| 494 | particle_tail_coordinates(1:2,5,nn) = 0.0 |
|---|
| 495 | particles(n)%tailpoints = 2 |
|---|
| 496 | ENDIF |
|---|
| 497 | |
|---|
| 498 | ENDIF |
|---|
| 499 | ENDDO |
|---|
| 500 | ENDIF |
|---|
| 501 | |
|---|
| 502 | ! |
|---|
| 503 | !-- Plot initial positions of particles (only if particle advection is |
|---|
| 504 | !-- switched on from the beginning of the simulation (t=0)) |
|---|
| 505 | IF ( particle_advection_start == 0.0 ) CALL data_output_dvrp |
|---|
| 506 | |
|---|
| 507 | ENDIF |
|---|
| 508 | |
|---|
| 509 | ! |
|---|
| 510 | !-- Check boundary condition and set internal variables |
|---|
| 511 | SELECT CASE ( bc_par_b ) |
|---|
| 512 | |
|---|
| 513 | CASE ( 'absorb' ) |
|---|
| 514 | ibc_par_b = 1 |
|---|
| 515 | |
|---|
| 516 | CASE ( 'reflect' ) |
|---|
| 517 | ibc_par_b = 2 |
|---|
| 518 | |
|---|
| 519 | CASE DEFAULT |
|---|
| 520 | WRITE( message_string, * ) 'unknown boundary condition ', & |
|---|
| 521 | 'bc_par_b = "', TRIM( bc_par_b ), '"' |
|---|
| 522 | CALL message( 'init_particles', 'PA0217', 1, 2, 0, 6, 0 ) |
|---|
| 523 | |
|---|
| 524 | END SELECT |
|---|
| 525 | SELECT CASE ( bc_par_t ) |
|---|
| 526 | |
|---|
| 527 | CASE ( 'absorb' ) |
|---|
| 528 | ibc_par_t = 1 |
|---|
| 529 | |
|---|
| 530 | CASE ( 'reflect' ) |
|---|
| 531 | ibc_par_t = 2 |
|---|
| 532 | |
|---|
| 533 | CASE DEFAULT |
|---|
| 534 | WRITE( message_string, * ) 'unknown boundary condition ', & |
|---|
| 535 | 'bc_par_t = "', TRIM( bc_par_t ), '"' |
|---|
| 536 | CALL message( 'init_particles', 'PA0218', 1, 2, 0, 6, 0 ) |
|---|
| 537 | |
|---|
| 538 | END SELECT |
|---|
| 539 | SELECT CASE ( bc_par_lr ) |
|---|
| 540 | |
|---|
| 541 | CASE ( 'cyclic' ) |
|---|
| 542 | ibc_par_lr = 0 |
|---|
| 543 | |
|---|
| 544 | CASE ( 'absorb' ) |
|---|
| 545 | ibc_par_lr = 1 |
|---|
| 546 | |
|---|
| 547 | CASE ( 'reflect' ) |
|---|
| 548 | ibc_par_lr = 2 |
|---|
| 549 | |
|---|
| 550 | CASE DEFAULT |
|---|
| 551 | WRITE( message_string, * ) 'unknown boundary condition ', & |
|---|
| 552 | 'bc_par_lr = "', TRIM( bc_par_lr ), '"' |
|---|
| 553 | CALL message( 'init_particles', 'PA0219', 1, 2, 0, 6, 0 ) |
|---|
| 554 | |
|---|
| 555 | END SELECT |
|---|
| 556 | SELECT CASE ( bc_par_ns ) |
|---|
| 557 | |
|---|
| 558 | CASE ( 'cyclic' ) |
|---|
| 559 | ibc_par_ns = 0 |
|---|
| 560 | |
|---|
| 561 | CASE ( 'absorb' ) |
|---|
| 562 | ibc_par_ns = 1 |
|---|
| 563 | |
|---|
| 564 | CASE ( 'reflect' ) |
|---|
| 565 | ibc_par_ns = 2 |
|---|
| 566 | |
|---|
| 567 | CASE DEFAULT |
|---|
| 568 | WRITE( message_string, * ) 'unknown boundary condition ', & |
|---|
| 569 | 'bc_par_ns = "', TRIM( bc_par_ns ), '"' |
|---|
| 570 | CALL message( 'init_particles', 'PA0220', 1, 2, 0, 6, 0 ) |
|---|
| 571 | |
|---|
| 572 | END SELECT |
|---|
| 573 | ! |
|---|
| 574 | !-- Formats |
|---|
| 575 | 8000 FORMAT (I6,1X,F7.2,4X,I6,71X,I6) |
|---|
| 576 | |
|---|
| 577 | END SUBROUTINE init_particles |
|---|
