| 1 | !> @file lpm_boundary_conds.f90 |
|---|
| 2 | !------------------------------------------------------------------------------! |
|---|
| 3 | ! This file is part of the PALM model system. |
|---|
| 4 | ! |
|---|
| 5 | ! PALM is free software: you can redistribute it and/or modify it under the |
|---|
| 6 | ! terms of the GNU General Public License as published by the Free Software |
|---|
| 7 | ! Foundation, either version 3 of the License, or (at your option) any later |
|---|
| 8 | ! version. |
|---|
| 9 | ! |
|---|
| 10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
|---|
| 11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
|---|
| 12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
|---|
| 13 | ! |
|---|
| 14 | ! You should have received a copy of the GNU General Public License along with |
|---|
| 15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
|---|
| 16 | ! |
|---|
| 17 | ! Copyright 1997-2018 Leibniz Universitaet Hannover |
|---|
| 18 | !------------------------------------------------------------------------------! |
|---|
| 19 | ! |
|---|
| 20 | ! Current revisions: |
|---|
| 21 | ! ----------------- |
|---|
| 22 | ! |
|---|
| 23 | ! |
|---|
| 24 | ! Former revisions: |
|---|
| 25 | ! ----------------- |
|---|
| 26 | ! $Id: lpm_boundary_conds.f90 3562 2018-11-23 12:06:35Z maronga $ |
|---|
| 27 | ! variables documented |
|---|
| 28 | ! |
|---|
| 29 | ! 3241 2018-09-12 15:02:00Z raasch |
|---|
| 30 | ! unused variables removed |
|---|
| 31 | ! |
|---|
| 32 | ! 3189 2018-08-06 13:18:55Z Giersch |
|---|
| 33 | ! Bugfix in calculation of the x/y indices for current particle postion |
|---|
| 34 | ! |
|---|
| 35 | ! 3067 2018-06-12 14:04:34Z suehring |
|---|
| 36 | ! Remove write statements |
|---|
| 37 | ! |
|---|
| 38 | ! 2801 2018-02-14 16:01:55Z thiele |
|---|
| 39 | ! Introduce particle transfer in nested models. |
|---|
| 40 | ! |
|---|
| 41 | ! 2718 2018-01-02 08:49:38Z maronga |
|---|
| 42 | ! Corrected "Former revisions" section |
|---|
| 43 | ! |
|---|
| 44 | ! 2701 2017-12-15 15:40:50Z suehring |
|---|
| 45 | ! Changes from last commit documented |
|---|
| 46 | ! |
|---|
| 47 | ! 2698 2017-12-14 18:46:24Z suehring |
|---|
| 48 | ! Particle reflections at downward-facing walls implemented. Moreover, |
|---|
| 49 | ! reflections are adjusted to revised particle grid box location. |
|---|
| 50 | ! (responsible Philipp Thiele) |
|---|
| 51 | ! |
|---|
| 52 | ! 2696 2017-12-14 17:12:51Z kanani |
|---|
| 53 | ! Change in file header (GPL part) |
|---|
| 54 | ! |
|---|
| 55 | ! 2606 2017-11-10 10:36:31Z schwenkel |
|---|
| 56 | ! Changed particle box locations: center of particle box now coincides |
|---|
| 57 | ! with scalar grid point of same index. |
|---|
| 58 | ! Renamed module and subroutines: lpm_pack_arrays_mod -> lpm_pack_and_sort_mod |
|---|
| 59 | ! lpm_pack_all_arrays -> lpm_sort_in_subboxes, lpm_pack_arrays -> lpm_pack |
|---|
| 60 | ! lpm_sort -> lpm_sort_timeloop_done |
|---|
| 61 | ! |
|---|
| 62 | ! 2318 2017-07-20 17:27:44Z suehring |
|---|
| 63 | ! Get topography top index via Function call |
|---|
| 64 | ! |
|---|
| 65 | ! 2317 2017-07-20 17:27:19Z suehring |
|---|
| 66 | ! |
|---|
| 67 | ! 2232 2017-05-30 17:47:52Z suehring |
|---|
| 68 | ! Adjustments to new topography and surface concept |
|---|
| 69 | ! Rename character range into location, as range is an intrinsic. |
|---|
| 70 | ! |
|---|
| 71 | ! 2000 2016-08-20 18:09:15Z knoop |
|---|
| 72 | ! Forced header and separation lines into 80 columns |
|---|
| 73 | ! |
|---|
| 74 | ! 1929 2016-06-09 16:25:25Z suehring |
|---|
| 75 | ! Rewritten wall reflection |
|---|
| 76 | ! |
|---|
| 77 | ! 1822 2016-04-07 07:49:42Z hoffmann |
|---|
| 78 | ! Tails removed. Unused variables removed. |
|---|
| 79 | ! |
|---|
| 80 | ! 1682 2015-10-07 23:56:08Z knoop |
|---|
| 81 | ! Code annotations made doxygen readable |
|---|
| 82 | ! |
|---|
| 83 | ! 1359 2014-04-11 17:15:14Z hoffmann |
|---|
| 84 | ! New particle structure integrated. |
|---|
| 85 | ! Kind definition added to all floating point numbers. |
|---|
| 86 | ! |
|---|
| 87 | ! 1320 2014-03-20 08:40:49Z raasch |
|---|
| 88 | ! ONLY-attribute added to USE-statements, |
|---|
| 89 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
|---|
| 90 | ! kinds are defined in new module kinds, |
|---|
| 91 | ! revision history before 2012 removed, |
|---|
| 92 | ! comment fields (!:) to be used for variable explanations added to |
|---|
| 93 | ! all variable declaration statements |
|---|
| 94 | ! |
|---|
| 95 | ! 1036 2012-10-22 13:43:42Z raasch |
|---|
| 96 | ! code put under GPL (PALM 3.9) |
|---|
| 97 | ! |
|---|
| 98 | ! 849 2012-03-15 10:35:09Z raasch |
|---|
| 99 | ! routine renamed lpm_boundary_conds, bottom and top boundary conditions |
|---|
| 100 | ! included (former part of advec_particles) |
|---|
| 101 | ! |
|---|
| 102 | ! 824 2012-02-17 09:09:57Z raasch |
|---|
| 103 | ! particle attributes speed_x|y|z_sgs renamed rvar1|2|3 |
|---|
| 104 | ! |
|---|
| 105 | ! Initial version (2007/03/09) |
|---|
| 106 | ! |
|---|
| 107 | ! Description: |
|---|
| 108 | ! ------------ |
|---|
| 109 | !> Boundary conditions for the Lagrangian particles. |
|---|
| 110 | !> The routine consists of two different parts. One handles the bottom (flat) |
|---|
| 111 | !> and top boundary. In this part, also particles which exceeded their lifetime |
|---|
| 112 | !> are deleted. |
|---|
| 113 | !> The other part handles the reflection of particles from vertical walls. |
|---|
| 114 | !> This part was developed by Jin Zhang during 2006-2007. |
|---|
| 115 | !> |
|---|
| 116 | !> To do: Code structure for finding the t_index values and for checking the |
|---|
| 117 | !> ----- reflection conditions is basically the same for all four cases, so it |
|---|
| 118 | !> should be possible to further simplify/shorten it. |
|---|
| 119 | !> |
|---|
| 120 | !> THE WALLS PART OF THIS ROUTINE HAS NOT BEEN TESTED FOR OCEAN RUNS SO FAR!!!! |
|---|
| 121 | !> (see offset_ocean_*) |
|---|
| 122 | !------------------------------------------------------------------------------! |
|---|
| 123 | SUBROUTINE lpm_boundary_conds( location , i, j, k ) |
|---|
| 124 | |
|---|
| 125 | |
|---|
| 126 | USE arrays_3d, & |
|---|
| 127 | ONLY: zw |
|---|
| 128 | |
|---|
| 129 | USE control_parameters, & |
|---|
| 130 | ONLY: message_string, particle_maximum_age |
|---|
| 131 | |
|---|
| 132 | USE cpulog, & |
|---|
| 133 | ONLY: cpu_log, log_point_s |
|---|
| 134 | |
|---|
| 135 | USE grid_variables, & |
|---|
| 136 | ONLY: ddx, dx, ddy, dy |
|---|
| 137 | |
|---|
| 138 | USE indices, & |
|---|
| 139 | ONLY: nxl, nxr, nyn, nys, nz, wall_flags_0 |
|---|
| 140 | |
|---|
| 141 | USE kinds |
|---|
| 142 | |
|---|
| 143 | USE particle_attributes, & |
|---|
| 144 | ONLY: deleted_particles, ibc_par_b, ibc_par_t, number_of_particles, & |
|---|
| 145 | particles, particle_type, use_sgs_for_particles |
|---|
| 146 | |
|---|
| 147 | USE pegrid |
|---|
| 148 | |
|---|
| 149 | IMPLICIT NONE |
|---|
| 150 | |
|---|
| 151 | CHARACTER (LEN=*) :: location !< general mode: boundary conditions at bottom/top of the model domain |
|---|
| 152 | !< or at vertical surfaces (buildings, terrain steps) |
|---|
| 153 | |
|---|
| 154 | INTEGER(iwp), INTENT(IN) :: i !< grid index of particle box along x |
|---|
| 155 | INTEGER(iwp), INTENT(IN) :: j !< grid index of particle box along y |
|---|
| 156 | INTEGER(iwp), INTENT(IN) :: k !< grid index of particle box along z |
|---|
| 157 | |
|---|
| 158 | INTEGER(iwp) :: inc !< dummy for sorting algorithmus |
|---|
| 159 | INTEGER(iwp) :: ir !< dummy for sorting algorithmus |
|---|
| 160 | INTEGER(iwp) :: i1 !< grid index (x) of old particle position |
|---|
| 161 | INTEGER(iwp) :: i2 !< grid index (x) of current particle position |
|---|
| 162 | INTEGER(iwp) :: i3 !< grid index (x) of intermediate particle position |
|---|
| 163 | INTEGER(iwp) :: jr !< dummy for sorting algorithmus |
|---|
| 164 | INTEGER(iwp) :: j1 !< grid index (y) of old particle position |
|---|
| 165 | INTEGER(iwp) :: j2 !< grid index (y) of current particle position |
|---|
| 166 | INTEGER(iwp) :: j3 !< grid index (y) of intermediate particle position |
|---|
| 167 | INTEGER(iwp) :: k1 !< grid index (z) of old particle position |
|---|
| 168 | INTEGER(iwp) :: k2 !< grid index (z) of current particle position |
|---|
| 169 | INTEGER(iwp) :: k3 !< grid index (z) of intermediate particle position |
|---|
| 170 | INTEGER(iwp) :: n !< particle number |
|---|
| 171 | INTEGER(iwp) :: t_index !< running index for intermediate particle timesteps in reflection algorithmus |
|---|
| 172 | INTEGER(iwp) :: t_index_number !< number of intermediate particle timesteps in reflection algorithmus |
|---|
| 173 | INTEGER(iwp) :: tmp_x !< dummy for sorting algorithm |
|---|
| 174 | INTEGER(iwp) :: tmp_y !< dummy for sorting algorithm |
|---|
| 175 | INTEGER(iwp) :: tmp_z !< dummy for sorting algorithm |
|---|
| 176 | |
|---|
| 177 | INTEGER(iwp), DIMENSION(0:10) :: x_ind(0:10) = 0 !< index array (x) of intermediate particle positions |
|---|
| 178 | INTEGER(iwp), DIMENSION(0:10) :: y_ind(0:10) = 0 !< index array (y) of intermediate particle positions |
|---|
| 179 | INTEGER(iwp), DIMENSION(0:10) :: z_ind(0:10) = 0 !< index array (z) of intermediate particle positions |
|---|
| 180 | |
|---|
| 181 | LOGICAL :: cross_wall_x !< flag to check if particle reflection along x is necessary |
|---|
| 182 | LOGICAL :: cross_wall_y !< flag to check if particle reflection along y is necessary |
|---|
| 183 | LOGICAL :: cross_wall_z !< flag to check if particle reflection along z is necessary |
|---|
| 184 | LOGICAL :: reflect_x !< flag to check if particle is already reflected along x |
|---|
| 185 | LOGICAL :: reflect_y !< flag to check if particle is already reflected along y |
|---|
| 186 | LOGICAL :: reflect_z !< flag to check if particle is already reflected along z |
|---|
| 187 | LOGICAL :: tmp_reach_x !< dummy for sorting algorithmus |
|---|
| 188 | LOGICAL :: tmp_reach_y !< dummy for sorting algorithmus |
|---|
| 189 | LOGICAL :: tmp_reach_z !< dummy for sorting algorithmus |
|---|
| 190 | LOGICAL :: x_wall_reached !< flag to check if particle has already reached wall |
|---|
| 191 | LOGICAL :: y_wall_reached !< flag to check if particle has already reached wall |
|---|
| 192 | LOGICAL :: z_wall_reached !< flag to check if particle has already reached wall |
|---|
| 193 | |
|---|
| 194 | LOGICAL, DIMENSION(0:10) :: reach_x !< flag to check if particle is at a yz-wall |
|---|
| 195 | LOGICAL, DIMENSION(0:10) :: reach_y !< flag to check if particle is at a xz-wall |
|---|
| 196 | LOGICAL, DIMENSION(0:10) :: reach_z !< flag to check if particle is at a xy-wall |
|---|
| 197 | |
|---|
| 198 | REAL(wp) :: dt_particle !< particle timestep |
|---|
| 199 | REAL(wp) :: eps = 1E-10_wp !< security number to check if particle has reached a wall |
|---|
| 200 | REAL(wp) :: pos_x !< intermediate particle position (x) |
|---|
| 201 | REAL(wp) :: pos_x_old !< particle position (x) at previous particle timestep |
|---|
| 202 | REAL(wp) :: pos_y !< intermediate particle position (y) |
|---|
| 203 | REAL(wp) :: pos_y_old !< particle position (y) at previous particle timestep |
|---|
| 204 | REAL(wp) :: pos_z !< intermediate particle position (z) |
|---|
| 205 | REAL(wp) :: pos_z_old !< particle position (z) at previous particle timestep |
|---|
| 206 | REAL(wp) :: prt_x !< current particle position (x) |
|---|
| 207 | REAL(wp) :: prt_y !< current particle position (y) |
|---|
| 208 | REAL(wp) :: prt_z !< current particle position (z) |
|---|
| 209 | REAL(wp) :: t_old !< previous reflection time |
|---|
| 210 | REAL(wp) :: tmp_t !< dummy for sorting algorithmus |
|---|
| 211 | REAL(wp) :: xwall !< location of wall in x |
|---|
| 212 | REAL(wp) :: ywall !< location of wall in y |
|---|
| 213 | REAL(wp) :: zwall !< location of wall in z |
|---|
| 214 | |
|---|
| 215 | REAL(wp), DIMENSION(0:10) :: t !< reflection time |
|---|
| 216 | |
|---|
| 217 | |
|---|
| 218 | IF ( location == 'bottom/top' ) THEN |
|---|
| 219 | |
|---|
| 220 | ! |
|---|
| 221 | !-- Apply boundary conditions to those particles that have crossed the top or |
|---|
| 222 | !-- bottom boundary and delete those particles, which are older than allowed |
|---|
| 223 | DO n = 1, number_of_particles |
|---|
| 224 | |
|---|
| 225 | ! |
|---|
| 226 | !-- Stop if particles have moved further than the length of one |
|---|
| 227 | !-- PE subdomain (newly released particles have age = age_m!) |
|---|
| 228 | IF ( particles(n)%age /= particles(n)%age_m ) THEN |
|---|
| 229 | IF ( ABS(particles(n)%speed_x) > & |
|---|
| 230 | ((nxr-nxl+2)*dx)/(particles(n)%age-particles(n)%age_m) .OR. & |
|---|
| 231 | ABS(particles(n)%speed_y) > & |
|---|
| 232 | ((nyn-nys+2)*dy)/(particles(n)%age-particles(n)%age_m) ) THEN |
|---|
| 233 | |
|---|
| 234 | WRITE( message_string, * ) 'particle too fast. n = ', n |
|---|
| 235 | CALL message( 'lpm_boundary_conds', 'PA0148', 2, 2, -1, 6, 1 ) |
|---|
| 236 | ENDIF |
|---|
| 237 | ENDIF |
|---|
| 238 | |
|---|
| 239 | IF ( particles(n)%age > particle_maximum_age .AND. & |
|---|
| 240 | particles(n)%particle_mask ) & |
|---|
| 241 | THEN |
|---|
| 242 | particles(n)%particle_mask = .FALSE. |
|---|
| 243 | deleted_particles = deleted_particles + 1 |
|---|
| 244 | ENDIF |
|---|
| 245 | |
|---|
| 246 | IF ( particles(n)%z >= zw(nz) .AND. particles(n)%particle_mask ) THEN |
|---|
| 247 | IF ( ibc_par_t == 1 ) THEN |
|---|
| 248 | ! |
|---|
| 249 | !-- Particle absorption |
|---|
| 250 | particles(n)%particle_mask = .FALSE. |
|---|
| 251 | deleted_particles = deleted_particles + 1 |
|---|
| 252 | ELSEIF ( ibc_par_t == 2 ) THEN |
|---|
| 253 | ! |
|---|
| 254 | !-- Particle reflection |
|---|
| 255 | particles(n)%z = 2.0_wp * zw(nz) - particles(n)%z |
|---|
| 256 | particles(n)%speed_z = -particles(n)%speed_z |
|---|
| 257 | IF ( use_sgs_for_particles .AND. & |
|---|
| 258 | particles(n)%rvar3 > 0.0_wp ) THEN |
|---|
| 259 | particles(n)%rvar3 = -particles(n)%rvar3 |
|---|
| 260 | ENDIF |
|---|
| 261 | ENDIF |
|---|
| 262 | ENDIF |
|---|
| 263 | |
|---|
| 264 | IF ( particles(n)%z < zw(0) .AND. particles(n)%particle_mask ) THEN |
|---|
| 265 | IF ( ibc_par_b == 1 ) THEN |
|---|
| 266 | ! |
|---|
| 267 | !-- Particle absorption |
|---|
| 268 | particles(n)%particle_mask = .FALSE. |
|---|
| 269 | deleted_particles = deleted_particles + 1 |
|---|
| 270 | ELSEIF ( ibc_par_b == 2 ) THEN |
|---|
| 271 | ! |
|---|
| 272 | !-- Particle reflection |
|---|
| 273 | particles(n)%z = 2.0_wp * zw(0) - particles(n)%z |
|---|
| 274 | particles(n)%speed_z = -particles(n)%speed_z |
|---|
| 275 | IF ( use_sgs_for_particles .AND. & |
|---|
| 276 | particles(n)%rvar3 < 0.0_wp ) THEN |
|---|
| 277 | particles(n)%rvar3 = -particles(n)%rvar3 |
|---|
| 278 | ENDIF |
|---|
| 279 | ENDIF |
|---|
| 280 | ENDIF |
|---|
| 281 | ENDDO |
|---|
| 282 | |
|---|
| 283 | ELSEIF ( location == 'walls' ) THEN |
|---|
| 284 | |
|---|
| 285 | |
|---|
| 286 | CALL cpu_log( log_point_s(48), 'lpm_wall_reflect', 'start' ) |
|---|
| 287 | |
|---|
| 288 | DO n = 1, number_of_particles |
|---|
| 289 | ! |
|---|
| 290 | !-- Recalculate particle timestep |
|---|
| 291 | dt_particle = particles(n)%age - particles(n)%age_m |
|---|
| 292 | ! |
|---|
| 293 | !-- Obtain x/y indices for current particle position |
|---|
| 294 | i2 = particles(n)%x * ddx |
|---|
| 295 | j2 = particles(n)%y * ddy |
|---|
| 296 | IF (zw(k) < particles(n)%z ) k2 = k + 1 |
|---|
| 297 | IF (zw(k) > particles(n)%z .AND. zw(k-1) < particles(n)%z ) k2 = k |
|---|
| 298 | IF (zw(k-1) > particles(n)%z ) k2 = k - 1 |
|---|
| 299 | ! |
|---|
| 300 | !-- Save current particle positions |
|---|
| 301 | prt_x = particles(n)%x |
|---|
| 302 | prt_y = particles(n)%y |
|---|
| 303 | prt_z = particles(n)%z |
|---|
| 304 | ! |
|---|
| 305 | !-- Recalculate old particle positions |
|---|
| 306 | pos_x_old = particles(n)%x - particles(n)%speed_x * dt_particle |
|---|
| 307 | pos_y_old = particles(n)%y - particles(n)%speed_y * dt_particle |
|---|
| 308 | pos_z_old = particles(n)%z - particles(n)%speed_z * dt_particle |
|---|
| 309 | ! |
|---|
| 310 | !-- Obtain x/y indices for old particle positions |
|---|
| 311 | i1 = i |
|---|
| 312 | j1 = j |
|---|
| 313 | k1 = k |
|---|
| 314 | ! |
|---|
| 315 | !-- Determine horizontal as well as vertical walls at which particle can |
|---|
| 316 | !-- be potentially reflected. |
|---|
| 317 | !-- Start with walls aligned in yz layer. |
|---|
| 318 | !-- Wall to the right |
|---|
| 319 | IF ( prt_x > pos_x_old ) THEN |
|---|
| 320 | xwall = ( i1 + 1 ) * dx |
|---|
| 321 | ! |
|---|
| 322 | !-- Wall to the left |
|---|
| 323 | ELSE |
|---|
| 324 | xwall = i1 * dx |
|---|
| 325 | ENDIF |
|---|
| 326 | ! |
|---|
| 327 | !-- Walls aligned in xz layer |
|---|
| 328 | !-- Wall to the north |
|---|
| 329 | IF ( prt_y > pos_y_old ) THEN |
|---|
| 330 | ywall = ( j1 +1 ) * dy |
|---|
| 331 | !-- Wall to the south |
|---|
| 332 | ELSE |
|---|
| 333 | ywall = j1 * dy |
|---|
| 334 | ENDIF |
|---|
| 335 | |
|---|
| 336 | IF ( prt_z > pos_z_old ) THEN |
|---|
| 337 | zwall = zw(k) |
|---|
| 338 | ELSE |
|---|
| 339 | zwall = zw(k-1) |
|---|
| 340 | ENDIF |
|---|
| 341 | ! |
|---|
| 342 | !-- Initialize flags to check if particle reflection is necessary |
|---|
| 343 | cross_wall_x = .FALSE. |
|---|
| 344 | cross_wall_y = .FALSE. |
|---|
| 345 | cross_wall_z = .FALSE. |
|---|
| 346 | ! |
|---|
| 347 | !-- Initialize flags to check if a wall is reached |
|---|
| 348 | reach_x = .FALSE. |
|---|
| 349 | reach_y = .FALSE. |
|---|
| 350 | reach_z = .FALSE. |
|---|
| 351 | ! |
|---|
| 352 | !-- Initialize flags to check if a particle was already reflected |
|---|
| 353 | reflect_x = .FALSE. |
|---|
| 354 | reflect_y = .FALSE. |
|---|
| 355 | reflect_z = .FALSE. |
|---|
| 356 | ! |
|---|
| 357 | !-- Initialize flags to check if a wall is already crossed. |
|---|
| 358 | !-- ( Required to obtain correct indices. ) |
|---|
| 359 | x_wall_reached = .FALSE. |
|---|
| 360 | y_wall_reached = .FALSE. |
|---|
| 361 | z_wall_reached = .FALSE. |
|---|
| 362 | ! |
|---|
| 363 | !-- Initialize time array |
|---|
| 364 | t = 0.0_wp |
|---|
| 365 | ! |
|---|
| 366 | !-- Check if particle can reach any wall. This case, calculate the |
|---|
| 367 | !-- fractional time needed to reach this wall. Store this fractional |
|---|
| 368 | !-- timestep in array t. Moreover, store indices for these grid |
|---|
| 369 | !-- boxes where the respective wall belongs to. |
|---|
| 370 | !-- Start with x-direction. |
|---|
| 371 | t_index = 1 |
|---|
| 372 | t(t_index) = ( xwall - pos_x_old ) & |
|---|
| 373 | / MERGE( MAX( prt_x - pos_x_old, 1E-30_wp ), & |
|---|
| 374 | MIN( prt_x - pos_x_old, -1E-30_wp ), & |
|---|
| 375 | prt_x > pos_x_old ) |
|---|
| 376 | x_ind(t_index) = i2 |
|---|
| 377 | y_ind(t_index) = j1 |
|---|
| 378 | z_ind(t_index) = k1 |
|---|
| 379 | reach_x(t_index) = .TRUE. |
|---|
| 380 | reach_y(t_index) = .FALSE. |
|---|
| 381 | reach_z(t_index) = .FALSE. |
|---|
| 382 | ! |
|---|
| 383 | !-- Store these values only if particle really reaches any wall. t must |
|---|
| 384 | !-- be in a interval between [0:1]. |
|---|
| 385 | IF ( t(t_index) <= 1.0_wp .AND. t(t_index) >= 0.0_wp ) THEN |
|---|
| 386 | t_index = t_index + 1 |
|---|
| 387 | cross_wall_x = .TRUE. |
|---|
| 388 | ENDIF |
|---|
| 389 | ! |
|---|
| 390 | !-- y-direction |
|---|
| 391 | t(t_index) = ( ywall - pos_y_old ) & |
|---|
| 392 | / MERGE( MAX( prt_y - pos_y_old, 1E-30_wp ), & |
|---|
| 393 | MIN( prt_y - pos_y_old, -1E-30_wp ), & |
|---|
| 394 | prt_y > pos_y_old ) |
|---|
| 395 | x_ind(t_index) = i1 |
|---|
| 396 | y_ind(t_index) = j2 |
|---|
| 397 | z_ind(t_index) = k1 |
|---|
| 398 | reach_x(t_index) = .FALSE. |
|---|
| 399 | reach_y(t_index) = .TRUE. |
|---|
| 400 | reach_z(t_index) = .FALSE. |
|---|
| 401 | IF ( t(t_index) <= 1.0_wp .AND. t(t_index) >= 0.0_wp ) THEN |
|---|
| 402 | t_index = t_index + 1 |
|---|
| 403 | cross_wall_y = .TRUE. |
|---|
| 404 | ENDIF |
|---|
| 405 | ! |
|---|
| 406 | !-- z-direction |
|---|
| 407 | t(t_index) = (zwall - pos_z_old ) & |
|---|
| 408 | / MERGE( MAX( prt_z - pos_z_old, 1E-30_wp ), & |
|---|
| 409 | MIN( prt_z - pos_z_old, -1E-30_wp ), & |
|---|
| 410 | prt_z > pos_z_old ) |
|---|
| 411 | |
|---|
| 412 | x_ind(t_index) = i1 |
|---|
| 413 | y_ind(t_index) = j1 |
|---|
| 414 | z_ind(t_index) = k2 |
|---|
| 415 | reach_x(t_index) = .FALSE. |
|---|
| 416 | reach_y(t_index) = .FALSE. |
|---|
| 417 | reach_z(t_index) = .TRUE. |
|---|
| 418 | IF( t(t_index) <= 1.0_wp .AND. t(t_index) >= 0.0_wp) THEN |
|---|
| 419 | t_index = t_index + 1 |
|---|
| 420 | cross_wall_z = .TRUE. |
|---|
| 421 | ENDIF |
|---|
| 422 | |
|---|
| 423 | t_index_number = t_index - 1 |
|---|
| 424 | ! |
|---|
| 425 | !-- Carry out reflection only if particle reaches any wall |
|---|
| 426 | IF ( cross_wall_x .OR. cross_wall_y .OR. cross_wall_z ) THEN |
|---|
| 427 | ! |
|---|
| 428 | !-- Sort fractional timesteps in ascending order. Also sort the |
|---|
| 429 | !-- corresponding indices and flag according to the time interval a |
|---|
| 430 | !-- particle reaches the respective wall. |
|---|
| 431 | inc = 1 |
|---|
| 432 | jr = 1 |
|---|
| 433 | DO WHILE ( inc <= t_index_number ) |
|---|
| 434 | inc = 3 * inc + 1 |
|---|
| 435 | ENDDO |
|---|
| 436 | |
|---|
| 437 | DO WHILE ( inc > 1 ) |
|---|
| 438 | inc = inc / 3 |
|---|
| 439 | DO ir = inc+1, t_index_number |
|---|
| 440 | tmp_t = t(ir) |
|---|
| 441 | tmp_x = x_ind(ir) |
|---|
| 442 | tmp_y = y_ind(ir) |
|---|
| 443 | tmp_z = z_ind(ir) |
|---|
| 444 | tmp_reach_x = reach_x(ir) |
|---|
| 445 | tmp_reach_y = reach_y(ir) |
|---|
| 446 | tmp_reach_z = reach_z(ir) |
|---|
| 447 | jr = ir |
|---|
| 448 | DO WHILE ( t(jr-inc) > tmp_t ) |
|---|
| 449 | t(jr) = t(jr-inc) |
|---|
| 450 | x_ind(jr) = x_ind(jr-inc) |
|---|
| 451 | y_ind(jr) = y_ind(jr-inc) |
|---|
| 452 | z_ind(jr) = z_ind(jr-inc) |
|---|
| 453 | reach_x(jr) = reach_x(jr-inc) |
|---|
| 454 | reach_y(jr) = reach_y(jr-inc) |
|---|
| 455 | reach_z(jr) = reach_z(jr-inc) |
|---|
| 456 | jr = jr - inc |
|---|
| 457 | IF ( jr <= inc ) EXIT |
|---|
| 458 | ENDDO |
|---|
| 459 | t(jr) = tmp_t |
|---|
| 460 | x_ind(jr) = tmp_x |
|---|
| 461 | y_ind(jr) = tmp_y |
|---|
| 462 | z_ind(jr) = tmp_z |
|---|
| 463 | reach_x(jr) = tmp_reach_x |
|---|
| 464 | reach_y(jr) = tmp_reach_y |
|---|
| 465 | reach_z(jr) = tmp_reach_z |
|---|
| 466 | ENDDO |
|---|
| 467 | ENDDO |
|---|
| 468 | ! |
|---|
| 469 | !-- Initialize temporary particle positions |
|---|
| 470 | pos_x = pos_x_old |
|---|
| 471 | pos_y = pos_y_old |
|---|
| 472 | pos_z = pos_z_old |
|---|
| 473 | ! |
|---|
| 474 | !-- Loop over all times a particle possibly moves into a new grid box |
|---|
| 475 | t_old = 0.0_wp |
|---|
| 476 | DO t_index = 1, t_index_number |
|---|
| 477 | ! |
|---|
| 478 | !-- Calculate intermediate particle position according to the |
|---|
| 479 | !-- timesteps a particle reaches any wall. |
|---|
| 480 | pos_x = pos_x + ( t(t_index) - t_old ) * dt_particle & |
|---|
| 481 | * particles(n)%speed_x |
|---|
| 482 | pos_y = pos_y + ( t(t_index) - t_old ) * dt_particle & |
|---|
| 483 | * particles(n)%speed_y |
|---|
| 484 | pos_z = pos_z + ( t(t_index) - t_old ) * dt_particle & |
|---|
| 485 | * particles(n)%speed_z |
|---|
| 486 | ! |
|---|
| 487 | !-- Obtain x/y grid indices for intermediate particle position from |
|---|
| 488 | !-- sorted index array |
|---|
| 489 | i3 = x_ind(t_index) |
|---|
| 490 | j3 = y_ind(t_index) |
|---|
| 491 | k3 = z_ind(t_index) |
|---|
| 492 | ! |
|---|
| 493 | !-- Check which wall is already reached |
|---|
| 494 | IF ( .NOT. x_wall_reached ) x_wall_reached = reach_x(t_index) |
|---|
| 495 | IF ( .NOT. y_wall_reached ) y_wall_reached = reach_y(t_index) |
|---|
| 496 | IF ( .NOT. z_wall_reached ) z_wall_reached = reach_z(t_index) |
|---|
| 497 | ! |
|---|
| 498 | !-- Check if a particle needs to be reflected at any yz-wall. If |
|---|
| 499 | !-- necessary, carry out reflection. Please note, a security |
|---|
| 500 | !-- constant is required, as the particle position does not |
|---|
| 501 | !-- necessarily exactly match the wall location due to rounding |
|---|
| 502 | !-- errors. |
|---|
| 503 | IF ( reach_x(t_index) .AND. & |
|---|
| 504 | ABS( pos_x - xwall ) < eps .AND. & |
|---|
| 505 | .NOT. BTEST(wall_flags_0(k3,j3,i3),0) .AND. & |
|---|
| 506 | .NOT. reflect_x ) THEN |
|---|
| 507 | ! |
|---|
| 508 | ! |
|---|
| 509 | !-- Reflection in x-direction. |
|---|
| 510 | !-- Ensure correct reflection by MIN/MAX functions, depending on |
|---|
| 511 | !-- direction of particle transport. |
|---|
| 512 | !-- Due to rounding errors pos_x does not exactly match the wall |
|---|
| 513 | !-- location, leading to erroneous reflection. |
|---|
| 514 | pos_x = MERGE( MIN( 2.0_wp * xwall - pos_x, xwall ), & |
|---|
| 515 | MAX( 2.0_wp * xwall - pos_x, xwall ), & |
|---|
| 516 | particles(n)%x > xwall ) |
|---|
| 517 | ! |
|---|
| 518 | !-- Change sign of particle speed |
|---|
| 519 | particles(n)%speed_x = - particles(n)%speed_x |
|---|
| 520 | ! |
|---|
| 521 | !-- Also change sign of subgrid-scale particle speed |
|---|
| 522 | particles(n)%rvar1 = - particles(n)%rvar1 |
|---|
| 523 | ! |
|---|
| 524 | !-- Set flag that reflection along x is already done |
|---|
| 525 | reflect_x = .TRUE. |
|---|
| 526 | ! |
|---|
| 527 | !-- As the particle does not cross any further yz-wall during |
|---|
| 528 | !-- this timestep, set further x-indices to the current one. |
|---|
| 529 | x_ind(t_index:t_index_number) = i1 |
|---|
| 530 | ! |
|---|
| 531 | !-- If particle already reached the wall but was not reflected, |
|---|
| 532 | !-- set further x-indices to the new one. |
|---|
| 533 | ELSEIF ( x_wall_reached .AND. .NOT. reflect_x ) THEN |
|---|
| 534 | x_ind(t_index:t_index_number) = i2 |
|---|
| 535 | ENDIF !particle reflection in x direction done |
|---|
| 536 | |
|---|
| 537 | ! |
|---|
| 538 | !-- Check if a particle needs to be reflected at any xz-wall. If |
|---|
| 539 | !-- necessary, carry out reflection. Please note, a security |
|---|
| 540 | !-- constant is required, as the particle position does not |
|---|
| 541 | !-- necessarily exactly match the wall location due to rounding |
|---|
| 542 | !-- errors. |
|---|
| 543 | IF ( reach_y(t_index) .AND. & |
|---|
| 544 | ABS( pos_y - ywall ) < eps .AND. & |
|---|
| 545 | .NOT. BTEST(wall_flags_0(k3,j3,i3),0) .AND. & |
|---|
| 546 | .NOT. reflect_y ) THEN |
|---|
| 547 | ! |
|---|
| 548 | ! |
|---|
| 549 | !-- Reflection in y-direction. |
|---|
| 550 | !-- Ensure correct reflection by MIN/MAX functions, depending on |
|---|
| 551 | !-- direction of particle transport. |
|---|
| 552 | !-- Due to rounding errors pos_y does not exactly match the wall |
|---|
| 553 | !-- location, leading to erroneous reflection. |
|---|
| 554 | pos_y = MERGE( MIN( 2.0_wp * ywall - pos_y, ywall ), & |
|---|
| 555 | MAX( 2.0_wp * ywall - pos_y, ywall ), & |
|---|
| 556 | particles(n)%y > ywall ) |
|---|
| 557 | ! |
|---|
| 558 | !-- Change sign of particle speed |
|---|
| 559 | particles(n)%speed_y = - particles(n)%speed_y |
|---|
| 560 | ! |
|---|
| 561 | !-- Also change sign of subgrid-scale particle speed |
|---|
| 562 | particles(n)%rvar2 = - particles(n)%rvar2 |
|---|
| 563 | ! |
|---|
| 564 | !-- Set flag that reflection along y is already done |
|---|
| 565 | reflect_y = .TRUE. |
|---|
| 566 | ! |
|---|
| 567 | !-- As the particle does not cross any further xz-wall during |
|---|
| 568 | !-- this timestep, set further y-indices to the current one. |
|---|
| 569 | y_ind(t_index:t_index_number) = j1 |
|---|
| 570 | ! |
|---|
| 571 | !-- If particle already reached the wall but was not reflected, |
|---|
| 572 | !-- set further y-indices to the new one. |
|---|
| 573 | ELSEIF ( y_wall_reached .AND. .NOT. reflect_y ) THEN |
|---|
| 574 | y_ind(t_index:t_index_number) = j2 |
|---|
| 575 | ENDIF !particle reflection in y direction done |
|---|
| 576 | |
|---|
| 577 | ! |
|---|
| 578 | !-- Check if a particle needs to be reflected at any xy-wall. If |
|---|
| 579 | !-- necessary, carry out reflection. Please note, a security |
|---|
| 580 | !-- constant is required, as the particle position does not |
|---|
| 581 | !-- necessarily exactly match the wall location due to rounding |
|---|
| 582 | !-- errors. |
|---|
| 583 | IF ( reach_z(t_index) .AND. & |
|---|
| 584 | ABS( pos_z - zwall ) < eps .AND. & |
|---|
| 585 | .NOT. BTEST(wall_flags_0(k3,j3,i3),0) .AND. & |
|---|
| 586 | .NOT. reflect_z ) THEN |
|---|
| 587 | ! |
|---|
| 588 | ! |
|---|
| 589 | !-- Reflection in z-direction. |
|---|
| 590 | !-- Ensure correct reflection by MIN/MAX functions, depending on |
|---|
| 591 | !-- direction of particle transport. |
|---|
| 592 | !-- Due to rounding errors pos_z does not exactly match the wall |
|---|
| 593 | !-- location, leading to erroneous reflection. |
|---|
| 594 | pos_z = MERGE( MIN( 2.0_wp * zwall - pos_z, zwall ), & |
|---|
| 595 | MAX( 2.0_wp * zwall - pos_z, zwall ), & |
|---|
| 596 | particles(n)%z > zwall ) |
|---|
| 597 | ! |
|---|
| 598 | !-- Change sign of particle speed |
|---|
| 599 | particles(n)%speed_z = - particles(n)%speed_z |
|---|
| 600 | ! |
|---|
| 601 | !-- Also change sign of subgrid-scale particle speed |
|---|
| 602 | particles(n)%rvar3 = - particles(n)%rvar3 |
|---|
| 603 | ! |
|---|
| 604 | !-- Set flag that reflection along z is already done |
|---|
| 605 | reflect_z = .TRUE. |
|---|
| 606 | ! |
|---|
| 607 | !-- As the particle does not cross any further xy-wall during |
|---|
| 608 | !-- this timestep, set further z-indices to the current one. |
|---|
| 609 | z_ind(t_index:t_index_number) = k1 |
|---|
| 610 | ! |
|---|
| 611 | !-- If particle already reached the wall but was not reflected, |
|---|
| 612 | !-- set further z-indices to the new one. |
|---|
| 613 | ELSEIF ( z_wall_reached .AND. .NOT. reflect_z ) THEN |
|---|
| 614 | z_ind(t_index:t_index_number) = k2 |
|---|
| 615 | ENDIF !particle reflection in z direction done |
|---|
| 616 | |
|---|
| 617 | ! |
|---|
| 618 | !-- Swap time |
|---|
| 619 | t_old = t(t_index) |
|---|
| 620 | |
|---|
| 621 | ENDDO |
|---|
| 622 | ! |
|---|
| 623 | !-- If a particle was reflected, calculate final position from last |
|---|
| 624 | !-- intermediate position. |
|---|
| 625 | IF ( reflect_x .OR. reflect_y .OR. reflect_z ) THEN |
|---|
| 626 | |
|---|
| 627 | particles(n)%x = pos_x + ( 1.0_wp - t_old ) * dt_particle & |
|---|
| 628 | * particles(n)%speed_x |
|---|
| 629 | particles(n)%y = pos_y + ( 1.0_wp - t_old ) * dt_particle & |
|---|
| 630 | * particles(n)%speed_y |
|---|
| 631 | particles(n)%z = pos_z + ( 1.0_wp - t_old ) * dt_particle & |
|---|
| 632 | * particles(n)%speed_z |
|---|
| 633 | |
|---|
| 634 | ENDIF |
|---|
| 635 | |
|---|
| 636 | ENDIF |
|---|
| 637 | |
|---|
| 638 | ENDDO |
|---|
| 639 | |
|---|
| 640 | CALL cpu_log( log_point_s(48), 'lpm_wall_reflect', 'stop' ) |
|---|
| 641 | |
|---|
| 642 | ENDIF |
|---|
| 643 | |
|---|
| 644 | END SUBROUTINE lpm_boundary_conds |
|---|
