Changeset 1359 for palm/trunk/SOURCE/lpm.f90
- Timestamp:
- Apr 11, 2014 5:15:14 PM (10 years ago)
- File:
-
- 1 edited
-
palm/trunk/SOURCE/lpm.f90 (modified) (11 diffs)
Legend:
- Unmodified
- Added
- Removed
-
palm/trunk/SOURCE/lpm.f90
r1321 r1359 20 20 ! Current revisions: 21 21 ! ------------------ 22 ! 22 ! New particle structure integrated. 23 ! Kind definition added to all floating point numbers. 23 24 ! 24 25 ! Former revisions: … … 82 83 USE control_parameters, & 83 84 ONLY: cloud_droplets, dt_3d, dt_3d_reached, dt_3d_reached_l, & 84 molecular_viscosity, simulated_time 85 molecular_viscosity, simulated_time, topography 85 86 86 87 USE cpulog, & 87 88 ONLY: cpu_log, log_point, log_point_s 88 89 90 USE indices, & 91 ONLY: nxl, nxr, nys, nyn, nzb, nzt 92 89 93 USE kinds 90 94 95 USE lpm_exchange_horiz_mod, & 96 ONLY: lpm_exchange_horiz, lpm_move_particle 97 98 USE lpm_pack_arrays_mod, & 99 ONLY: lpm_pack_all_arrays 100 91 101 USE particle_attributes, & 92 ONLY: collision_kernel, deleted_particles, d t_sort_particles,&93 d eleted_tails, dt_write_particle_data, dt_prel, end_time_prel,&94 number_of_particles, number_of_particle_groups,particles,&95 particle _groups, particle_mask, trlp_count_sum, tail_mask,&96 t ime_prel, time_sort_particles, time_write_particle_data,&97 t rlp_count_recv_sum, trnp_count_sum, trnp_count_recv_sum,&98 tr rp_count_sum, trrp_count_recv_sum, trsp_count_sum,&99 trsp_count_ recv_sum, use_particle_tails, use_sgs_for_particles,&100 write_particle_statistics102 ONLY: collision_kernel, deleted_particles, deleted_tails, & 103 dt_write_particle_data, dt_prel, end_time_prel, & 104 grid_particles, number_of_particles, number_of_particle_groups, & 105 particles, particle_groups, prt_count, trlp_count_sum, & 106 tail_mask, time_prel, time_sort_particles, & 107 time_write_particle_data, trlp_count_recv_sum, trnp_count_sum, & 108 trnp_count_recv_sum, trrp_count_sum, trrp_count_recv_sum, & 109 trsp_count_sum, trsp_count_recv_sum, use_particle_tails, & 110 use_sgs_for_particles, write_particle_statistics 101 111 102 112 USE pegrid … … 104 114 IMPLICIT NONE 105 115 106 INTEGER(iwp) :: m !: 107 116 INTEGER(iwp) :: i !: 117 INTEGER(iwp) :: ie !: 118 INTEGER(iwp) :: is !: 119 INTEGER(iwp) :: j !: 120 INTEGER(iwp) :: je !: 121 INTEGER(iwp) :: js !: 122 INTEGER(iwp) :: k !: 123 INTEGER(iwp) :: ke !: 124 INTEGER(iwp) :: ks !: 125 INTEGER(iwp) :: m !: 126 INTEGER(iwp), SAVE :: steps = 0 !: 127 128 LOGICAL :: first_loop_stride !: 108 129 109 130 CALL cpu_log( log_point(25), 'lpm', 'start' ) … … 125 146 ENDIF 126 147 127 128 148 ! 129 149 !-- Initialize arrays for marking those particles/tails to be deleted after the 130 150 !-- (sub-) timestep 131 particle_mask = .TRUE.132 151 deleted_particles = 0 133 152 … … 157 176 !-- of the particle groups 158 177 DO m = 1, number_of_particle_groups 159 IF ( particle_groups(m)%density_ratio /= 0.0 ) THEN178 IF ( particle_groups(m)%density_ratio /= 0.0_wp ) THEN 160 179 particle_groups(m)%exp_arg = & 161 4.5 * particle_groups(m)%density_ratio *&180 4.5_wp * particle_groups(m)%density_ratio * & 162 181 molecular_viscosity / ( particle_groups(m)%radius )**2 163 particle_groups(m)%exp_term = EXP( -particle_groups(m)%exp_arg * & 164 dt_3d ) 182 183 particle_groups(m)%exp_term = EXP( -particle_groups(m)%exp_arg * & 184 dt_3d ) 165 185 ENDIF 166 186 ENDDO 167 187 168 169 ! 170 !-- Particle (droplet) growth by condensation/evaporation and collision 171 IF ( cloud_droplets ) THEN 172 173 ! 174 !-- Reset summation arrays 175 ql_c = 0.0; ql_v = 0.0; ql_vp = 0.0 176 177 ! 178 !-- Droplet growth by condensation / evaporation 179 CALL lpm_droplet_condensation 180 181 ! 182 !-- Particle growth by collision 183 IF ( collision_kernel /= 'none' ) CALL lpm_droplet_collision 184 185 ENDIF 186 187 188 ! 189 !-- If particle advection includes SGS velocity components, calculate the 190 !-- required SGS quantities (i.e. gradients of the TKE, as well as horizontally 191 !-- averaged profiles of the SGS TKE and the resolved-scale velocity variances) 192 IF ( use_sgs_for_particles ) CALL lpm_init_sgs_tke 193 194 195 ! 196 !-- Initialize the variable storing the total time that a particle has advanced 197 !-- within the timestep procedure 198 particles(1:number_of_particles)%dt_sum = 0.0 199 200 188 ! 189 !-- If necessary, release new set of particles 190 IF ( time_prel >= dt_prel .AND. end_time_prel > simulated_time ) THEN 191 192 CALL lpm_release_set 193 ! 194 !-- The MOD function allows for changes in the output interval with 195 !-- restart runs. 196 time_prel = MOD( time_prel, MAX( dt_prel, dt_3d ) ) 197 198 ENDIF 199 ! 200 !-- Reset summation arrays 201 IF ( cloud_droplets) THEN 202 ql_c = 0.0_wp 203 ql_v = 0.0_wp 204 ql_vp = 0.0_wp 205 ENDIF 206 207 first_loop_stride = .TRUE. 208 grid_particles(:,:,:)%time_loop_done = .TRUE. 201 209 ! 202 210 !-- Timestep loop for particle advection. … … 204 212 !-- (within the total domain!) has reached the LES timestep (dt_3d). 205 213 !-- In case of including the SGS velocities, the particle timestep may be 206 !-- smaller than the LES timestep (because of the Lagrangian timescale restric-207 !-- tion) and particles may require to undergo several particle timesteps,208 !-- before the LES timestep is reached. Because the number of these particle209 !-- timesteps to be carried out is unknown at first, these steps are carried210 !-- out in the following infinite loop with exit condition.214 !-- smaller than the LES timestep (because of the Lagrangian timescale 215 !-- restriction) and particles may require to undergo several particle 216 !-- timesteps, before the LES timestep is reached. Because the number of these 217 !-- particle timesteps to be carried out is unknown at first, these steps are 218 !-- carried out in the following infinite loop with exit condition. 211 219 DO 212 213 220 CALL cpu_log( log_point_s(44), 'lpm_advec', 'start' ) 214 215 ! 216 !-- Initialize the switch used for the loop exit condition checked at the 217 !-- end of this loop. 218 !-- If at least one particle has failed to reach the LES timestep, this 219 !-- switch will be set false. 220 dt_3d_reached_l = .TRUE. 221 222 ! 223 !-- Particle advection 224 CALL lpm_advec 225 226 ! 227 !-- Particle reflection from walls 228 CALL lpm_boundary_conds( 'walls' ) 229 230 ! 231 !-- User-defined actions after the calculation of the new particle position 232 CALL user_lpm_advec 221 CALL cpu_log( log_point_s(44), 'lpm_advec', 'pause' ) 222 ! 223 !-- If particle advection includes SGS velocity components, calculate the 224 !-- required SGS quantities (i.e. gradients of the TKE, as well as 225 !-- horizontally averaged profiles of the SGS TKE and the resolved-scale 226 !-- velocity variances) 227 228 IF ( use_sgs_for_particles ) CALL lpm_init_sgs_tke 229 230 DO i = nxl, nxr 231 DO j = nys, nyn 232 DO k = nzb+1, nzt 233 234 number_of_particles = prt_count(k,j,i) 235 ! 236 !-- If grid cell gets empty, flag must be true 237 IF ( number_of_particles <= 0 ) THEN 238 grid_particles(k,j,i)%time_loop_done = .TRUE. 239 CYCLE 240 ENDIF 241 242 IF ( .NOT. first_loop_stride .AND. & 243 grid_particles(k,j,i)%time_loop_done ) CYCLE 244 245 particles => grid_particles(k,j,i)%particles(1:number_of_particles) 246 247 particles(1:number_of_particles)%particle_mask = .TRUE. 248 ! 249 !-- Initialize the variable storing the total time that a particle 250 !-- has advanced within the timestep procedure 251 IF ( first_loop_stride ) THEN 252 particles(1:number_of_particles)%dt_sum = 0.0_wp 253 ENDIF 254 ! 255 !-- Particle (droplet) growth by condensation/evaporation and 256 !-- collision 257 IF ( cloud_droplets .AND. first_loop_stride) THEN 258 ! 259 !-- Droplet growth by condensation / evaporation 260 CALL lpm_droplet_condensation(i,j,k) 261 ! 262 !-- Particle growth by collision 263 IF ( collision_kernel /= 'none' ) THEN 264 CALL lpm_droplet_collision(i,j,k) 265 ENDIF 266 267 ENDIF 268 ! 269 !-- Initialize the switch used for the loop exit condition checked 270 !-- at the end of this loop. If at least one particle has failed to 271 !-- reach the LES timestep, this switch will be set false in 272 !-- lpm_advec. 273 dt_3d_reached_l = .TRUE. 274 275 ! 276 !-- Particle advection 277 CALL lpm_advec(i,j,k) 278 ! 279 !-- Particle reflection from walls 280 IF ( topography /= 'flat' ) THEN 281 CALL lpm_boundary_conds( 'walls' ) 282 ENDIF 283 ! 284 !-- User-defined actions after the calculation of the new particle 285 !-- position 286 CALL user_lpm_advec 287 ! 288 !-- Apply boundary conditions to those particles that have crossed 289 !-- the top or bottom boundary and delete those particles, which are 290 !-- older than allowed 291 CALL lpm_boundary_conds( 'bottom/top' ) 292 ! 293 !--- If not all particles of the actual grid cell have reached the 294 !-- LES timestep, this cell has to to another loop iteration. Due to 295 !-- the fact that particles can move into neighboring grid cell, 296 !-- these neighbor cells also have to perform another loop iteration 297 IF ( .NOT. dt_3d_reached_l ) THEN 298 ks = MAX(nzb+1,k) 299 ke = MIN(nzt,k) 300 js = MAX(nys,j) 301 je = MIN(nyn,j) 302 is = MAX(nxl,i) 303 ie = MIN(nxr,i) 304 grid_particles(ks:ke,js:je,is:ie)%time_loop_done = .FALSE. 305 ENDIF 306 307 ENDDO 308 ENDDO 309 ENDDO 310 311 steps = steps + 1 312 dt_3d_reached_l = ALL(grid_particles(:,:,:)%time_loop_done) 233 313 234 314 ! … … 250 330 251 331 ! 252 !-- If necessary, release new set of particles 253 IF ( time_prel >= dt_prel .AND. end_time_prel > simulated_time .AND. & 254 dt_3d_reached ) THEN 255 256 CALL lpm_release_set 257 258 ! 259 !-- The MOD function allows for changes in the output interval with 260 !-- restart runs. 261 time_prel = MOD( time_prel, MAX( dt_prel, dt_3d ) ) 262 263 ENDIF 332 !-- Move Particles local to PE to a different grid cell 333 CALL lpm_move_particle 264 334 265 335 ! … … 268 338 269 339 ! 270 !-- Apply boundary conditions to those particles that have crossed the top or271 !-- bottom boundary and delete those particles, which are older than allowed272 CALL lpm_boundary_conds( 'bottom/top' )273 274 !275 340 !-- Pack particles (eliminate those marked for deletion), 276 341 !-- determine new number of particles 277 IF ( number_of_particles > 0 .AND. deleted_particles > 0 ) THEN 278 CALL lpm_pack_arrays 279 ENDIF 280 281 ! 282 !-- Initialize variables for the next (sub-) timestep, i.e. for marking those 283 !-- particles to be deleted after the timestep 284 particle_mask = .TRUE. 342 CALL lpm_pack_all_arrays 343 344 ! 345 !-- Initialize variables for the next (sub-) timestep, i.e., for marking 346 !-- those particles to be deleted after the timestep 285 347 deleted_particles = 0 286 348 … … 293 355 IF ( dt_3d_reached ) EXIT 294 356 357 first_loop_stride = .FALSE. 295 358 ENDDO ! timestep loop 296 359 297 298 !299 !-- Sort particles in the sequence the gridboxes are stored in the memory300 time_sort_particles = time_sort_particles + dt_3d301 IF ( time_sort_particles >= dt_sort_particles ) THEN302 CALL lpm_sort_arrays303 time_sort_particles = MOD( time_sort_particles, &304 MAX( dt_sort_particles, dt_3d ) )305 ENDIF306 307 308 360 ! 309 361 !-- Calculate the new liquid water content for each grid box 310 IF ( cloud_droplets ) CALL lpm_calc_liquid_water_content 362 IF ( cloud_droplets ) THEN 363 CALL lpm_calc_liquid_water_content 364 ENDIF 365 311 366 312 367 … … 325 380 326 381 ! 382 !-- particle tails currently not available 383 ! 327 384 !-- If required, add the current particle positions to the particle tails 328 385 ! IF ( use_particle_tails ) CALL lpm_extend_tails 329 386 330 387 … … 336 393 CALL cpu_log( log_point(25), 'lpm', 'stop' ) 337 394 338 339 395 END SUBROUTINE lpm
Note: See TracChangeset
for help on using the changeset viewer.
