[1] | 1 | SUBROUTINE pres |
---|
| 2 | |
---|
| 3 | !------------------------------------------------------------------------------! |
---|
[484] | 4 | ! Current revisions: |
---|
[1] | 5 | ! ----------------- |
---|
[707] | 6 | ! Calculation of weighted average of p is now handled in the same way |
---|
| 7 | ! regardless of the number of ghost layers (advection scheme), |
---|
| 8 | ! multigrid and sor method are using p_loc for iterative advancements of |
---|
| 9 | ! pressure, |
---|
| 10 | ! localsum calculation modified for proper OpenMP reduction, |
---|
| 11 | ! bc_lr/ns replaced by bc_lr/ns_cyc |
---|
[674] | 12 | ! |
---|
[668] | 13 | ! Former revisions: |
---|
| 14 | ! ----------------- |
---|
[694] | 15 | ! $Id: pres.f90 707 2011-03-29 11:39:40Z raasch $ |
---|
| 16 | ! |
---|
| 17 | ! 693 2011-03-08 09:..:..Z raasch |
---|
[695] | 18 | ! bugfix: weighting coefficient added to ibm branch |
---|
[694] | 19 | ! |
---|
| 20 | ! 680 2011-02-04 23:16:06Z gryschka |
---|
[681] | 21 | ! bugfix: collective_wait |
---|
[668] | 22 | ! |
---|
[676] | 23 | ! 675 2011-01-19 10:56:55Z suehring |
---|
| 24 | ! Removed bugfix while copying tend. |
---|
| 25 | ! |
---|
[674] | 26 | ! 673 2011-01-18 16:19:48Z suehring |
---|
| 27 | ! Weighting coefficients added for right computation of the pressure during |
---|
| 28 | ! Runge-Kutta substeps. |
---|
| 29 | ! |
---|
[668] | 30 | ! 667 2010-12-23 12:06:00Z suehring/gryschka |
---|
[667] | 31 | ! New allocation of tend when ws-scheme and multigrid is used. This is due to |
---|
| 32 | ! reasons of perforance of the data_exchange. The same is done with p after |
---|
| 33 | ! poismg is called. |
---|
| 34 | ! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng when no |
---|
| 35 | ! multigrid is used. Calls of exchange_horiz are modified. |
---|
| 36 | ! bugfix: After pressure correction no volume flow correction in case of |
---|
| 37 | ! non-cyclic boundary conditions |
---|
| 38 | ! (has to be done only before pressure correction) |
---|
| 39 | ! Call of SOR routine is referenced with ddzu_pres. |
---|
| 40 | ! |
---|
[623] | 41 | ! 622 2010-12-10 08:08:13Z raasch |
---|
| 42 | ! optional barriers included in order to speed up collective operations |
---|
| 43 | ! |
---|
[198] | 44 | ! 151 2008-03-07 13:42:18Z raasch |
---|
| 45 | ! Bugfix in volume flow control for non-cyclic boundary conditions |
---|
| 46 | ! |
---|
[110] | 47 | ! 106 2007-08-16 14:30:26Z raasch |
---|
| 48 | ! Volume flow conservation added for the remaining three outflow boundaries |
---|
| 49 | ! |
---|
[90] | 50 | ! 85 2007-05-11 09:35:14Z raasch |
---|
| 51 | ! Division through dt_3d replaced by multiplication of the inverse. |
---|
| 52 | ! For performance optimisation, this is done in the loop calculating the |
---|
| 53 | ! divergence instead of using a seperate loop. |
---|
| 54 | ! |
---|
[77] | 55 | ! 75 2007-03-22 09:54:05Z raasch |
---|
[75] | 56 | ! Volume flow control for non-cyclic boundary conditions added (currently only |
---|
[76] | 57 | ! for the north boundary!!), 2nd+3rd argument removed from exchange horiz, |
---|
| 58 | ! mean vertical velocity is removed in case of Neumann boundary conditions |
---|
| 59 | ! both at the bottom and the top |
---|
[1] | 60 | ! |
---|
[3] | 61 | ! RCS Log replace by Id keyword, revision history cleaned up |
---|
| 62 | ! |
---|
[1] | 63 | ! Revision 1.25 2006/04/26 13:26:12 raasch |
---|
| 64 | ! OpenMP optimization (+localsum, threadsum) |
---|
| 65 | ! |
---|
| 66 | ! Revision 1.1 1997/07/24 11:24:44 raasch |
---|
| 67 | ! Initial revision |
---|
| 68 | ! |
---|
| 69 | ! |
---|
| 70 | ! Description: |
---|
| 71 | ! ------------ |
---|
| 72 | ! Compute the divergence of the provisional velocity field. Solve the Poisson |
---|
| 73 | ! equation for the perturbation pressure. Compute the final velocities using |
---|
| 74 | ! this perturbation pressure. Compute the remaining divergence. |
---|
| 75 | !------------------------------------------------------------------------------! |
---|
| 76 | |
---|
| 77 | USE arrays_3d |
---|
| 78 | USE constants |
---|
| 79 | USE control_parameters |
---|
| 80 | USE cpulog |
---|
| 81 | USE grid_variables |
---|
| 82 | USE indices |
---|
| 83 | USE interfaces |
---|
| 84 | USE pegrid |
---|
| 85 | USE poisfft_mod |
---|
| 86 | USE poisfft_hybrid_mod |
---|
| 87 | USE statistics |
---|
| 88 | |
---|
| 89 | IMPLICIT NONE |
---|
| 90 | |
---|
| 91 | INTEGER :: i, j, k, sr |
---|
| 92 | |
---|
[673] | 93 | REAL :: ddt_3d, localsum, threadsum, d_weight_pres |
---|
[1] | 94 | |
---|
| 95 | REAL, DIMENSION(1:2) :: volume_flow_l, volume_flow_offset |
---|
[76] | 96 | REAL, DIMENSION(1:nzt) :: w_l, w_l_l |
---|
[1] | 97 | |
---|
| 98 | |
---|
| 99 | CALL cpu_log( log_point(8), 'pres', 'start' ) |
---|
| 100 | |
---|
[85] | 101 | |
---|
| 102 | ddt_3d = 1.0 / dt_3d |
---|
[673] | 103 | d_weight_pres = 1. / weight_pres(intermediate_timestep_count) |
---|
[85] | 104 | |
---|
[1] | 105 | ! |
---|
[707] | 106 | !-- Multigrid method expects array d to have one ghost layer. |
---|
| 107 | !-- |
---|
[1] | 108 | IF ( psolver == 'multigrid' ) THEN |
---|
[667] | 109 | |
---|
[1] | 110 | DEALLOCATE( d ) |
---|
[667] | 111 | ALLOCATE( d(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) ) |
---|
[707] | 112 | |
---|
| 113 | ! |
---|
| 114 | !-- Since p is later used to hold the weighted average of the substeps, it |
---|
| 115 | !-- cannot be used in the iterative solver. Therefore, its initial value is |
---|
| 116 | !-- stored on p_loc, which is then iteratively advanced in every substep. |
---|
| 117 | IF ( intermediate_timestep_count == 1 ) THEN |
---|
| 118 | DO i = nxl-1, nxr+1 |
---|
| 119 | DO j = nys-1, nyn+1 |
---|
| 120 | DO k = nzb, nzt+1 |
---|
| 121 | p_loc(k,j,i) = p(k,j,i) |
---|
| 122 | ENDDO |
---|
| 123 | ENDDO |
---|
| 124 | ENDDO |
---|
[667] | 125 | ENDIF |
---|
| 126 | |
---|
[707] | 127 | ELSEIF ( psolver == 'sor' .AND. intermediate_timestep_count == 1 ) THEN |
---|
| 128 | |
---|
| 129 | ! |
---|
| 130 | !-- Since p is later used to hold the weighted average of the substeps, it |
---|
| 131 | !-- cannot be used in the iterative solver. Therefore, its initial value is |
---|
| 132 | !-- stored on p_loc, which is then iteratively advanced in every substep. |
---|
| 133 | p_loc = p |
---|
| 134 | |
---|
[1] | 135 | ENDIF |
---|
| 136 | |
---|
| 137 | ! |
---|
[75] | 138 | !-- Conserve the volume flow at the outflow in case of non-cyclic lateral |
---|
| 139 | !-- boundary conditions |
---|
[106] | 140 | !-- WARNING: so far, this conservation does not work at the left/south |
---|
| 141 | !-- boundary if the topography at the inflow differs from that at the |
---|
| 142 | !-- outflow! For this case, volume_flow_area needs adjustment! |
---|
| 143 | ! |
---|
| 144 | !-- Left/right |
---|
[680] | 145 | |
---|
[106] | 146 | IF ( conserve_volume_flow .AND. ( outflow_l .OR. outflow_r ) ) THEN |
---|
[75] | 147 | |
---|
[106] | 148 | volume_flow(1) = 0.0 |
---|
| 149 | volume_flow_l(1) = 0.0 |
---|
| 150 | |
---|
| 151 | IF ( outflow_l ) THEN |
---|
| 152 | i = 0 |
---|
| 153 | ELSEIF ( outflow_r ) THEN |
---|
| 154 | i = nx+1 |
---|
| 155 | ENDIF |
---|
| 156 | |
---|
| 157 | DO j = nys, nyn |
---|
| 158 | ! |
---|
| 159 | !-- Sum up the volume flow through the south/north boundary |
---|
| 160 | DO k = nzb_2d(j,i) + 1, nzt |
---|
[667] | 161 | volume_flow_l(1) = volume_flow_l(1) + u(k,j,i) * dzw(k) |
---|
[106] | 162 | ENDDO |
---|
| 163 | ENDDO |
---|
| 164 | |
---|
| 165 | #if defined( __parallel ) |
---|
[680] | 166 | IF ( collective_wait ) CALL MPI_BARRIER( comm1dy, ierr ) |
---|
[106] | 167 | CALL MPI_ALLREDUCE( volume_flow_l(1), volume_flow(1), 1, MPI_REAL, & |
---|
| 168 | MPI_SUM, comm1dy, ierr ) |
---|
| 169 | #else |
---|
| 170 | volume_flow = volume_flow_l |
---|
| 171 | #endif |
---|
| 172 | volume_flow_offset(1) = ( volume_flow_initial(1) - volume_flow(1) ) & |
---|
| 173 | / volume_flow_area(1) |
---|
| 174 | |
---|
[667] | 175 | DO j = nysg, nyng |
---|
| 176 | DO k = nzb_2d(j,i) + 1, nzt |
---|
[106] | 177 | u(k,j,i) = u(k,j,i) + volume_flow_offset(1) |
---|
| 178 | ENDDO |
---|
| 179 | ENDDO |
---|
| 180 | |
---|
| 181 | ENDIF |
---|
| 182 | |
---|
| 183 | ! |
---|
| 184 | !-- South/north |
---|
| 185 | IF ( conserve_volume_flow .AND. ( outflow_n .OR. outflow_s ) ) THEN |
---|
| 186 | |
---|
[75] | 187 | volume_flow(2) = 0.0 |
---|
| 188 | volume_flow_l(2) = 0.0 |
---|
| 189 | |
---|
[106] | 190 | IF ( outflow_s ) THEN |
---|
| 191 | j = 0 |
---|
| 192 | ELSEIF ( outflow_n ) THEN |
---|
[75] | 193 | j = ny+1 |
---|
[106] | 194 | ENDIF |
---|
| 195 | |
---|
| 196 | DO i = nxl, nxr |
---|
[75] | 197 | ! |
---|
[106] | 198 | !-- Sum up the volume flow through the south/north boundary |
---|
| 199 | DO k = nzb_2d(j,i) + 1, nzt |
---|
[667] | 200 | volume_flow_l(2) = volume_flow_l(2) + v(k,j,i) * dzw(k) |
---|
[75] | 201 | ENDDO |
---|
[106] | 202 | ENDDO |
---|
| 203 | |
---|
[75] | 204 | #if defined( __parallel ) |
---|
[680] | 205 | IF ( collective_wait ) CALL MPI_BARRIER( comm1dx, ierr ) |
---|
[75] | 206 | CALL MPI_ALLREDUCE( volume_flow_l(2), volume_flow(2), 1, MPI_REAL, & |
---|
| 207 | MPI_SUM, comm1dx, ierr ) |
---|
| 208 | #else |
---|
| 209 | volume_flow = volume_flow_l |
---|
| 210 | #endif |
---|
| 211 | volume_flow_offset(2) = ( volume_flow_initial(2) - volume_flow(2) ) & |
---|
[106] | 212 | / volume_flow_area(2) |
---|
[75] | 213 | |
---|
[667] | 214 | DO i = nxlg, nxrg |
---|
[106] | 215 | DO k = nzb_v_inner(j,i) + 1, nzt |
---|
| 216 | v(k,j,i) = v(k,j,i) + volume_flow_offset(2) |
---|
[75] | 217 | ENDDO |
---|
[106] | 218 | ENDDO |
---|
[75] | 219 | |
---|
| 220 | ENDIF |
---|
| 221 | |
---|
[76] | 222 | ! |
---|
| 223 | !-- Remove mean vertical velocity |
---|
| 224 | IF ( ibc_p_b == 1 .AND. ibc_p_t == 1 ) THEN |
---|
| 225 | IF ( simulated_time > 0.0 ) THEN ! otherwise nzb_w_inner is not yet known |
---|
| 226 | w_l = 0.0; w_l_l = 0.0 |
---|
| 227 | DO i = nxl, nxr |
---|
| 228 | DO j = nys, nyn |
---|
| 229 | DO k = nzb_w_inner(j,i)+1, nzt |
---|
| 230 | w_l_l(k) = w_l_l(k) + w(k,j,i) |
---|
| 231 | ENDDO |
---|
| 232 | ENDDO |
---|
| 233 | ENDDO |
---|
| 234 | #if defined( __parallel ) |
---|
[622] | 235 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
---|
[76] | 236 | CALL MPI_ALLREDUCE( w_l_l(1), w_l(1), nzt, MPI_REAL, MPI_SUM, comm2d, & |
---|
| 237 | ierr ) |
---|
| 238 | #else |
---|
| 239 | w_l = w_l_l |
---|
| 240 | #endif |
---|
| 241 | DO k = 1, nzt |
---|
| 242 | w_l(k) = w_l(k) / ngp_2dh_outer(k,0) |
---|
| 243 | ENDDO |
---|
[667] | 244 | DO i = nxlg, nxrg |
---|
| 245 | DO j = nysg, nyng |
---|
[76] | 246 | DO k = nzb_w_inner(j,i)+1, nzt |
---|
| 247 | w(k,j,i) = w(k,j,i) - w_l(k) |
---|
| 248 | ENDDO |
---|
| 249 | ENDDO |
---|
| 250 | ENDDO |
---|
| 251 | ENDIF |
---|
| 252 | ENDIF |
---|
[75] | 253 | |
---|
| 254 | ! |
---|
[1] | 255 | !-- Compute the divergence of the provisional velocity field. |
---|
| 256 | CALL cpu_log( log_point_s(1), 'divergence', 'start' ) |
---|
| 257 | |
---|
| 258 | IF ( psolver == 'multigrid' ) THEN |
---|
| 259 | !$OMP PARALLEL DO SCHEDULE( STATIC ) |
---|
| 260 | DO i = nxl-1, nxr+1 |
---|
| 261 | DO j = nys-1, nyn+1 |
---|
| 262 | DO k = nzb, nzt+1 |
---|
| 263 | d(k,j,i) = 0.0 |
---|
| 264 | ENDDO |
---|
| 265 | ENDDO |
---|
| 266 | ENDDO |
---|
| 267 | ELSE |
---|
| 268 | !$OMP PARALLEL DO SCHEDULE( STATIC ) |
---|
| 269 | DO i = nxl, nxra |
---|
| 270 | DO j = nys, nyna |
---|
| 271 | DO k = nzb+1, nzta |
---|
| 272 | d(k,j,i) = 0.0 |
---|
| 273 | ENDDO |
---|
| 274 | ENDDO |
---|
| 275 | ENDDO |
---|
| 276 | ENDIF |
---|
| 277 | |
---|
| 278 | localsum = 0.0 |
---|
| 279 | threadsum = 0.0 |
---|
| 280 | |
---|
| 281 | #if defined( __ibm ) |
---|
| 282 | !$OMP PARALLEL PRIVATE (i,j,k) FIRSTPRIVATE(threadsum) REDUCTION(+:localsum) |
---|
| 283 | !$OMP DO SCHEDULE( STATIC ) |
---|
| 284 | DO i = nxl, nxr |
---|
| 285 | DO j = nys, nyn |
---|
| 286 | DO k = nzb_s_inner(j,i)+1, nzt |
---|
[85] | 287 | d(k,j,i) = ( ( u(k,j,i+1) - u(k,j,i) ) * ddx + & |
---|
| 288 | ( v(k,j+1,i) - v(k,j,i) ) * ddy + & |
---|
[673] | 289 | ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) ) * ddt_3d & |
---|
| 290 | * d_weight_pres |
---|
[1] | 291 | ENDDO |
---|
| 292 | ! |
---|
| 293 | !-- Additional pressure boundary condition at the bottom boundary for |
---|
| 294 | !-- inhomogeneous Prandtl layer heat fluxes and temperatures, respectively |
---|
| 295 | !-- dp/dz = -(dtau13/dx + dtau23/dy) + g*pt'/pt0. |
---|
| 296 | !-- This condition must not be applied at the start of a run, because then |
---|
| 297 | !-- flow_statistics has not yet been called and thus sums = 0. |
---|
| 298 | IF ( ibc_p_b == 2 .AND. sums(nzb+1,4) /= 0.0 ) THEN |
---|
| 299 | k = nzb_s_inner(j,i) |
---|
| 300 | d(k+1,j,i) = d(k+1,j,i) + ( & |
---|
| 301 | ( usws(j,i+1) - usws(j,i) ) * ddx & |
---|
| 302 | + ( vsws(j+1,i) - vsws(j,i) ) * ddy & |
---|
| 303 | - g * ( pt(k+1,j,i) - sums(k+1,4) ) / & |
---|
| 304 | sums(k+1,4) & |
---|
[673] | 305 | ) * ddzw(k+1) * ddt_3d * d_weight_pres |
---|
[1] | 306 | ENDIF |
---|
| 307 | |
---|
| 308 | ! |
---|
| 309 | !-- Compute possible PE-sum of divergences for flow_statistics |
---|
| 310 | DO k = nzb_s_inner(j,i)+1, nzt |
---|
| 311 | threadsum = threadsum + ABS( d(k,j,i) ) |
---|
| 312 | ENDDO |
---|
| 313 | |
---|
| 314 | ENDDO |
---|
| 315 | ENDDO |
---|
| 316 | |
---|
[707] | 317 | localsum = localsum + threadsum * dt_3d * & |
---|
| 318 | weight_pres(intermediate_timestep_count) |
---|
[693] | 319 | |
---|
[1] | 320 | !$OMP END PARALLEL |
---|
| 321 | #else |
---|
| 322 | IF ( ibc_p_b == 2 .AND. sums(nzb+1,4) /= 0.0 ) THEN |
---|
| 323 | !$OMP PARALLEL PRIVATE (i,j,k) |
---|
| 324 | !$OMP DO SCHEDULE( STATIC ) |
---|
| 325 | DO i = nxl, nxr |
---|
| 326 | DO j = nys, nyn |
---|
| 327 | DO k = nzb_s_inner(j,i)+1, nzt |
---|
[667] | 328 | d(k,j,i) = ( ( u(k,j,i+1) - u(k,j,i) ) * ddx + & |
---|
| 329 | ( v(k,j+1,i) - v(k,j,i) ) * ddy + & |
---|
[673] | 330 | ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) ) * ddt_3d & |
---|
| 331 | * d_weight_pres |
---|
[1] | 332 | ENDDO |
---|
| 333 | ENDDO |
---|
| 334 | ! |
---|
| 335 | !-- Additional pressure boundary condition at the bottom boundary for |
---|
| 336 | !-- inhomogeneous Prandtl layer heat fluxes and temperatures, respectively |
---|
| 337 | !-- dp/dz = -(dtau13/dx + dtau23/dy) + g*pt'/pt0. |
---|
| 338 | !-- This condition must not be applied at the start of a run, because then |
---|
| 339 | !-- flow_statistics has not yet been called and thus sums = 0. |
---|
| 340 | DO j = nys, nyn |
---|
| 341 | k = nzb_s_inner(j,i) |
---|
| 342 | d(k+1,j,i) = d(k+1,j,i) + ( & |
---|
| 343 | ( usws(j,i+1) - usws(j,i) ) * ddx & |
---|
| 344 | + ( vsws(j+1,i) - vsws(j,i) ) * ddy & |
---|
| 345 | - g * ( pt(k+1,j,i) - sums(k+1,4) ) / & |
---|
| 346 | sums(k+1,4) & |
---|
[673] | 347 | ) * ddzw(k+1) * ddt_3d & |
---|
| 348 | * d_weight_pres |
---|
[1] | 349 | ENDDO |
---|
| 350 | ENDDO |
---|
| 351 | !$OMP END PARALLEL |
---|
| 352 | |
---|
| 353 | ELSE |
---|
| 354 | |
---|
| 355 | !$OMP PARALLEL PRIVATE (i,j,k) |
---|
| 356 | !$OMP DO SCHEDULE( STATIC ) |
---|
| 357 | DO i = nxl, nxr |
---|
| 358 | DO j = nys, nyn |
---|
| 359 | DO k = nzb_s_inner(j,i)+1, nzt |
---|
[85] | 360 | d(k,j,i) = ( ( u(k,j,i+1) - u(k,j,i) ) * ddx + & |
---|
[667] | 361 | ( v(k,j+1,i) - v(k,j,i) ) * ddy + & |
---|
[673] | 362 | ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) ) * ddt_3d & |
---|
| 363 | * d_weight_pres |
---|
[1] | 364 | ENDDO |
---|
| 365 | ENDDO |
---|
| 366 | ENDDO |
---|
| 367 | !$OMP END PARALLEL |
---|
| 368 | |
---|
| 369 | ENDIF |
---|
| 370 | |
---|
| 371 | ! |
---|
| 372 | !-- Compute possible PE-sum of divergences for flow_statistics |
---|
| 373 | !$OMP PARALLEL PRIVATE (i,j,k) FIRSTPRIVATE(threadsum) REDUCTION(+:localsum) |
---|
| 374 | !$OMP DO SCHEDULE( STATIC ) |
---|
| 375 | DO i = nxl, nxr |
---|
| 376 | DO j = nys, nyn |
---|
| 377 | DO k = nzb+1, nzt |
---|
| 378 | threadsum = threadsum + ABS( d(k,j,i) ) |
---|
| 379 | ENDDO |
---|
| 380 | ENDDO |
---|
| 381 | ENDDO |
---|
[707] | 382 | localsum = localsum + threadsum * dt_3d * & |
---|
| 383 | weight_pres(intermediate_timestep_count) |
---|
[1] | 384 | !$OMP END PARALLEL |
---|
| 385 | #endif |
---|
| 386 | |
---|
| 387 | ! |
---|
| 388 | !-- For completeness, set the divergence sum of all statistic regions to those |
---|
| 389 | !-- of the total domain |
---|
| 390 | sums_divold_l(0:statistic_regions) = localsum |
---|
| 391 | |
---|
| 392 | CALL cpu_log( log_point_s(1), 'divergence', 'stop' ) |
---|
| 393 | |
---|
| 394 | ! |
---|
| 395 | !-- Compute the pressure perturbation solving the Poisson equation |
---|
| 396 | IF ( psolver(1:7) == 'poisfft' ) THEN |
---|
| 397 | |
---|
| 398 | ! |
---|
| 399 | !-- Enlarge the size of tend, used as a working array for the transpositions |
---|
| 400 | IF ( nxra > nxr .OR. nyna > nyn .OR. nza > nz ) THEN |
---|
| 401 | DEALLOCATE( tend ) |
---|
| 402 | ALLOCATE( tend(1:nza,nys:nyna,nxl:nxra) ) |
---|
| 403 | ENDIF |
---|
| 404 | |
---|
| 405 | ! |
---|
| 406 | !-- Solve Poisson equation via FFT and solution of tridiagonal matrices |
---|
| 407 | IF ( psolver == 'poisfft' ) THEN |
---|
| 408 | ! |
---|
| 409 | !-- Solver for 2d-decomposition |
---|
| 410 | CALL poisfft( d, tend ) |
---|
| 411 | ELSEIF ( psolver == 'poisfft_hybrid' ) THEN |
---|
| 412 | ! |
---|
| 413 | !-- Solver for 1d-decomposition (using MPI and OpenMP). |
---|
| 414 | !-- The old hybrid-solver is still included here, as long as there |
---|
| 415 | !-- are some optimization problems in poisfft |
---|
| 416 | CALL poisfft_hybrid( d ) |
---|
| 417 | ENDIF |
---|
| 418 | |
---|
| 419 | ! |
---|
| 420 | !-- Resize tend to its normal size |
---|
| 421 | IF ( nxra > nxr .OR. nyna > nyn .OR. nza > nz ) THEN |
---|
| 422 | DEALLOCATE( tend ) |
---|
[667] | 423 | ALLOCATE( tend(nzb:nzt+1,nysg:nyng,nxlg:nxrg) ) |
---|
[1] | 424 | ENDIF |
---|
| 425 | |
---|
| 426 | ! |
---|
| 427 | !-- Store computed perturbation pressure and set boundary condition in |
---|
| 428 | !-- z-direction |
---|
| 429 | !$OMP PARALLEL DO |
---|
| 430 | DO i = nxl, nxr |
---|
| 431 | DO j = nys, nyn |
---|
| 432 | DO k = nzb+1, nzt |
---|
| 433 | tend(k,j,i) = d(k,j,i) |
---|
| 434 | ENDDO |
---|
| 435 | ENDDO |
---|
| 436 | ENDDO |
---|
| 437 | |
---|
| 438 | ! |
---|
| 439 | !-- Bottom boundary: |
---|
| 440 | !-- This condition is only required for internal output. The pressure |
---|
| 441 | !-- gradient (dp(nzb+1)-dp(nzb))/dz is not used anywhere else. |
---|
| 442 | IF ( ibc_p_b == 1 ) THEN |
---|
| 443 | ! |
---|
| 444 | !-- Neumann (dp/dz = 0) |
---|
| 445 | !$OMP PARALLEL DO |
---|
[667] | 446 | DO i = nxlg, nxrg |
---|
| 447 | DO j = nysg, nyng |
---|
[1] | 448 | tend(nzb_s_inner(j,i),j,i) = tend(nzb_s_inner(j,i)+1,j,i) |
---|
| 449 | ENDDO |
---|
| 450 | ENDDO |
---|
| 451 | |
---|
| 452 | ELSEIF ( ibc_p_b == 2 ) THEN |
---|
| 453 | ! |
---|
| 454 | !-- Neumann condition for inhomogeneous surfaces, |
---|
| 455 | !-- here currently still in the form of a zero gradient. Actually |
---|
| 456 | !-- dp/dz = -(dtau13/dx + dtau23/dy) + g*pt'/pt0 would have to be used for |
---|
| 457 | !-- the computation (cf. above: computation of divergences). |
---|
| 458 | !$OMP PARALLEL DO |
---|
[667] | 459 | DO i = nxlg, nxrg |
---|
| 460 | DO j = nysg, nyng |
---|
[1] | 461 | tend(nzb_s_inner(j,i),j,i) = tend(nzb_s_inner(j,i)+1,j,i) |
---|
| 462 | ENDDO |
---|
| 463 | ENDDO |
---|
| 464 | |
---|
| 465 | ELSE |
---|
| 466 | ! |
---|
| 467 | !-- Dirichlet |
---|
| 468 | !$OMP PARALLEL DO |
---|
[667] | 469 | DO i = nxlg, nxrg |
---|
| 470 | DO j = nysg, nyng |
---|
[1] | 471 | tend(nzb_s_inner(j,i),j,i) = 0.0 |
---|
| 472 | ENDDO |
---|
| 473 | ENDDO |
---|
| 474 | |
---|
| 475 | ENDIF |
---|
| 476 | |
---|
| 477 | ! |
---|
| 478 | !-- Top boundary |
---|
| 479 | IF ( ibc_p_t == 1 ) THEN |
---|
| 480 | ! |
---|
| 481 | !-- Neumann |
---|
| 482 | !$OMP PARALLEL DO |
---|
[667] | 483 | DO i = nxlg, nxrg |
---|
| 484 | DO j = nysg, nyng |
---|
[1] | 485 | tend(nzt+1,j,i) = tend(nzt,j,i) |
---|
| 486 | ENDDO |
---|
| 487 | ENDDO |
---|
| 488 | |
---|
| 489 | ELSE |
---|
| 490 | ! |
---|
| 491 | !-- Dirichlet |
---|
| 492 | !$OMP PARALLEL DO |
---|
[667] | 493 | DO i = nxlg, nxrg |
---|
| 494 | DO j = nysg, nyng |
---|
[1] | 495 | tend(nzt+1,j,i) = 0.0 |
---|
| 496 | ENDDO |
---|
| 497 | ENDDO |
---|
| 498 | |
---|
| 499 | ENDIF |
---|
| 500 | |
---|
| 501 | ! |
---|
| 502 | !-- Exchange boundaries for p |
---|
[667] | 503 | CALL exchange_horiz( tend, nbgp ) |
---|
[1] | 504 | |
---|
| 505 | ELSEIF ( psolver == 'sor' ) THEN |
---|
| 506 | |
---|
| 507 | ! |
---|
| 508 | !-- Solve Poisson equation for perturbation pressure using SOR-Red/Black |
---|
| 509 | !-- scheme |
---|
[707] | 510 | CALL sor( d, ddzu_pres, ddzw, p_loc ) |
---|
| 511 | tend = p_loc |
---|
[1] | 512 | |
---|
| 513 | ELSEIF ( psolver == 'multigrid' ) THEN |
---|
| 514 | |
---|
| 515 | ! |
---|
| 516 | !-- Solve Poisson equation for perturbation pressure using Multigrid scheme, |
---|
[667] | 517 | !-- array tend is used to store the residuals, logical exchange_mg is used |
---|
| 518 | !-- to discern data exchange in multigrid ( 1 ghostpoint ) and normal grid |
---|
| 519 | !-- ( nbgp ghost points ). |
---|
[1] | 520 | CALL poismg( tend ) |
---|
[707] | 521 | |
---|
[1] | 522 | ! |
---|
| 523 | !-- Restore perturbation pressure on tend because this array is used |
---|
| 524 | !-- further below to correct the velocity fields |
---|
[707] | 525 | DO i = nxl-1, nxr+1 |
---|
| 526 | DO j = nys-1, nyn+1 |
---|
| 527 | DO k = nzb, nzt+1 |
---|
| 528 | tend(k,j,i) = p_loc(k,j,i) |
---|
| 529 | ENDDO |
---|
| 530 | ENDDO |
---|
| 531 | ENDDO |
---|
[667] | 532 | |
---|
[1] | 533 | ENDIF |
---|
| 534 | |
---|
| 535 | ! |
---|
[707] | 536 | !-- Store perturbation pressure on array p, used for pressure data output. |
---|
| 537 | !-- Ghost layers are added in the output routines (except sor-method: see below) |
---|
| 538 | IF ( intermediate_timestep_count == 1 ) THEN |
---|
| 539 | !$OMP PARALLEL PRIVATE (i,j,k) |
---|
| 540 | !$OMP DO |
---|
| 541 | DO i = nxl-1, nxr+1 |
---|
| 542 | DO j = nys-1, nyn+1 |
---|
| 543 | DO k = nzb, nzt+1 |
---|
| 544 | p(k,j,i) = tend(k,j,i) * & |
---|
| 545 | weight_substep(intermediate_timestep_count) |
---|
[673] | 546 | ENDDO |
---|
[1] | 547 | ENDDO |
---|
[707] | 548 | ENDDO |
---|
| 549 | !$OMP END PARALLEL |
---|
| 550 | |
---|
| 551 | ELSE |
---|
| 552 | !$OMP PARALLEL PRIVATE (i,j,k) |
---|
| 553 | !$OMP DO |
---|
| 554 | DO i = nxl-1, nxr+1 |
---|
| 555 | DO j = nys-1, nyn+1 |
---|
| 556 | DO k = nzb, nzt+1 |
---|
| 557 | p(k,j,i) = p(k,j,i) + tend(k,j,i) * & |
---|
| 558 | weight_substep(intermediate_timestep_count) |
---|
[673] | 559 | ENDDO |
---|
| 560 | ENDDO |
---|
[707] | 561 | ENDDO |
---|
| 562 | !$OMP END PARALLEL |
---|
| 563 | |
---|
| 564 | ENDIF |
---|
[673] | 565 | |
---|
[707] | 566 | ! |
---|
| 567 | !-- SOR-method needs ghost layers for the next timestep |
---|
| 568 | IF ( psolver == 'sor' ) CALL exchange_horiz( p, nbgp ) |
---|
[682] | 569 | |
---|
[1] | 570 | ! |
---|
| 571 | !-- Correction of the provisional velocities with the current perturbation |
---|
| 572 | !-- pressure just computed |
---|
[707] | 573 | IF ( conserve_volume_flow .AND. ( bc_lr_cyc .OR. bc_ns_cyc ) ) THEN |
---|
[1] | 574 | volume_flow_l(1) = 0.0 |
---|
| 575 | volume_flow_l(2) = 0.0 |
---|
| 576 | ENDIF |
---|
[707] | 577 | |
---|
[1] | 578 | !$OMP PARALLEL PRIVATE (i,j,k) |
---|
| 579 | !$OMP DO |
---|
[673] | 580 | DO i = nxl, nxr |
---|
[1] | 581 | DO j = nys, nyn |
---|
| 582 | DO k = nzb_w_inner(j,i)+1, nzt |
---|
[707] | 583 | w(k,j,i) = w(k,j,i) - dt_3d * & |
---|
| 584 | ( tend(k+1,j,i) - tend(k,j,i) ) * ddzu(k+1) * & |
---|
| 585 | weight_pres(intermediate_timestep_count) |
---|
[1] | 586 | ENDDO |
---|
| 587 | DO k = nzb_u_inner(j,i)+1, nzt |
---|
[673] | 588 | u(k,j,i) = u(k,j,i) - dt_3d * & |
---|
[707] | 589 | ( tend(k,j,i) - tend(k,j,i-1) ) * ddx * & |
---|
| 590 | weight_pres(intermediate_timestep_count) |
---|
[1] | 591 | ENDDO |
---|
| 592 | DO k = nzb_v_inner(j,i)+1, nzt |
---|
[673] | 593 | v(k,j,i) = v(k,j,i) - dt_3d * & |
---|
[707] | 594 | ( tend(k,j,i) - tend(k,j-1,i) ) * ddy * & |
---|
| 595 | weight_pres(intermediate_timestep_count) |
---|
[673] | 596 | ENDDO |
---|
[1] | 597 | ! |
---|
| 598 | !-- Sum up the volume flow through the right and north boundary |
---|
[707] | 599 | IF ( conserve_volume_flow .AND. bc_lr_cyc .AND. bc_ns_cyc .AND. & |
---|
| 600 | i == nx ) THEN |
---|
[1] | 601 | !$OMP CRITICAL |
---|
| 602 | DO k = nzb_2d(j,i) + 1, nzt |
---|
[667] | 603 | volume_flow_l(1) = volume_flow_l(1) + u(k,j,i) * dzw(k) |
---|
[1] | 604 | ENDDO |
---|
| 605 | !$OMP END CRITICAL |
---|
| 606 | ENDIF |
---|
[707] | 607 | IF ( conserve_volume_flow .AND. bc_ns_cyc .AND. bc_lr_cyc .AND. & |
---|
| 608 | j == ny ) THEN |
---|
[1] | 609 | !$OMP CRITICAL |
---|
| 610 | DO k = nzb_2d(j,i) + 1, nzt |
---|
[667] | 611 | volume_flow_l(2) = volume_flow_l(2) + v(k,j,i) * dzw(k) |
---|
[1] | 612 | ENDDO |
---|
| 613 | !$OMP END CRITICAL |
---|
| 614 | ENDIF |
---|
| 615 | |
---|
| 616 | ENDDO |
---|
| 617 | ENDDO |
---|
| 618 | !$OMP END PARALLEL |
---|
[673] | 619 | |
---|
[1] | 620 | ! |
---|
| 621 | !-- Conserve the volume flow |
---|
[707] | 622 | IF ( conserve_volume_flow .AND. ( bc_lr_cyc .AND. bc_ns_cyc ) ) THEN |
---|
[1] | 623 | |
---|
| 624 | #if defined( __parallel ) |
---|
[622] | 625 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
---|
[1] | 626 | CALL MPI_ALLREDUCE( volume_flow_l(1), volume_flow(1), 2, MPI_REAL, & |
---|
| 627 | MPI_SUM, comm2d, ierr ) |
---|
| 628 | #else |
---|
| 629 | volume_flow = volume_flow_l |
---|
| 630 | #endif |
---|
| 631 | |
---|
| 632 | volume_flow_offset = ( volume_flow_initial - volume_flow ) / & |
---|
| 633 | volume_flow_area |
---|
| 634 | |
---|
| 635 | !$OMP PARALLEL PRIVATE (i,j,k) |
---|
| 636 | !$OMP DO |
---|
| 637 | DO i = nxl, nxr |
---|
| 638 | DO j = nys, nyn |
---|
[667] | 639 | DO k = nzb_u_inner(j,i) + 1, nzt |
---|
| 640 | u(k,j,i) = u(k,j,i) + volume_flow_offset(1) |
---|
| 641 | v(k,j,i) = v(k,j,i) + volume_flow_offset(2) |
---|
| 642 | ENDDO |
---|
[1] | 643 | ENDDO |
---|
| 644 | ENDDO |
---|
[667] | 645 | |
---|
[1] | 646 | !$OMP END PARALLEL |
---|
| 647 | |
---|
| 648 | ENDIF |
---|
| 649 | |
---|
| 650 | ! |
---|
| 651 | !-- Exchange of boundaries for the velocities |
---|
[667] | 652 | CALL exchange_horiz( u, nbgp ) |
---|
| 653 | CALL exchange_horiz( v, nbgp ) |
---|
| 654 | CALL exchange_horiz( w, nbgp ) |
---|
[1] | 655 | |
---|
| 656 | ! |
---|
| 657 | !-- Compute the divergence of the corrected velocity field, |
---|
| 658 | !-- a possible PE-sum is computed in flow_statistics |
---|
| 659 | CALL cpu_log( log_point_s(1), 'divergence', 'start' ) |
---|
| 660 | sums_divnew_l = 0.0 |
---|
| 661 | |
---|
| 662 | ! |
---|
| 663 | !-- d must be reset to zero because it can contain nonzero values below the |
---|
| 664 | !-- topography |
---|
| 665 | IF ( topography /= 'flat' ) d = 0.0 |
---|
| 666 | |
---|
| 667 | localsum = 0.0 |
---|
| 668 | threadsum = 0.0 |
---|
| 669 | |
---|
| 670 | !$OMP PARALLEL PRIVATE (i,j,k) FIRSTPRIVATE(threadsum) REDUCTION(+:localsum) |
---|
| 671 | !$OMP DO SCHEDULE( STATIC ) |
---|
| 672 | #if defined( __ibm ) |
---|
| 673 | DO i = nxl, nxr |
---|
| 674 | DO j = nys, nyn |
---|
| 675 | DO k = nzb_s_inner(j,i)+1, nzt |
---|
| 676 | d(k,j,i) = ( u(k,j,i+1) - u(k,j,i) ) * ddx + & |
---|
| 677 | ( v(k,j+1,i) - v(k,j,i) ) * ddy + & |
---|
| 678 | ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) |
---|
| 679 | ENDDO |
---|
| 680 | DO k = nzb+1, nzt |
---|
| 681 | threadsum = threadsum + ABS( d(k,j,i) ) |
---|
| 682 | ENDDO |
---|
| 683 | ENDDO |
---|
| 684 | ENDDO |
---|
| 685 | #else |
---|
| 686 | DO i = nxl, nxr |
---|
| 687 | DO j = nys, nyn |
---|
| 688 | DO k = nzb_s_inner(j,i)+1, nzt |
---|
| 689 | d(k,j,i) = ( u(k,j,i+1) - u(k,j,i) ) * ddx + & |
---|
| 690 | ( v(k,j+1,i) - v(k,j,i) ) * ddy + & |
---|
| 691 | ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) |
---|
| 692 | threadsum = threadsum + ABS( d(k,j,i) ) |
---|
| 693 | ENDDO |
---|
| 694 | ENDDO |
---|
| 695 | ENDDO |
---|
| 696 | #endif |
---|
[667] | 697 | |
---|
[1] | 698 | localsum = localsum + threadsum |
---|
| 699 | !$OMP END PARALLEL |
---|
| 700 | |
---|
| 701 | ! |
---|
| 702 | !-- For completeness, set the divergence sum of all statistic regions to those |
---|
| 703 | !-- of the total domain |
---|
| 704 | sums_divnew_l(0:statistic_regions) = localsum |
---|
| 705 | |
---|
| 706 | CALL cpu_log( log_point_s(1), 'divergence', 'stop' ) |
---|
| 707 | |
---|
| 708 | CALL cpu_log( log_point(8), 'pres', 'stop' ) |
---|
[667] | 709 | |
---|
[1] | 710 | |
---|
| 711 | |
---|
| 712 | END SUBROUTINE pres |
---|