Changeset 4540 for palm/trunk/SOURCE/timestep.f90
- Timestamp:
- May 18, 2020 3:23:29 PM (4 years ago)
- File:
-
- 1 edited
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palm/trunk/SOURCE/timestep.f90 (modified) (18 diffs)
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palm/trunk/SOURCE/timestep.f90
r4444 r4540 1 1 !> @file timestep.f90 2 !------------------------------------------------------------------------------ !2 !--------------------------------------------------------------------------------------------------! 3 3 ! This file is part of the PALM model system. 4 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/>. 5 ! PALM is free software: you can redistribute it and/or modify it under the terms of the GNU General 6 ! Public License as published by the Free Software Foundation, either version 3 of the License, or 7 ! (at your option) any later version. 8 ! 9 ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the 10 ! implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General 11 ! Public License for more details. 12 ! 13 ! You should have received a copy of the GNU General Public License along with PALM. If not, see 14 ! <http://www.gnu.org/licenses/>. 16 15 ! 17 16 ! Copyright 1997-2020 Leibniz Universitaet Hannover 18 !------------------------------------------------------------------------------! 17 !--------------------------------------------------------------------------------------------------! 18 ! 19 19 ! 20 20 ! Current revisions: 21 ! ----------------- -21 ! ----------------- 22 22 ! 23 23 ! … … 25 25 ! ----------------- 26 26 ! $Id$ 27 ! bugfix: cpp-directives for serial mode added 28 ! 27 ! File re-formatted to follow the PALM coding standard 28 ! 29 ! 30 ! 4444 2020-03-05 15:59:50Z raasch 31 ! Bugfix: cpp-directives for serial mode added 32 ! 29 33 ! 4360 2020-01-07 11:25:50Z suehring 30 34 ! Added missing OpenMP directives 31 ! 35 ! 32 36 ! 4233 2019-09-20 09:55:54Z knoop 33 37 ! OpenACC data update host removed 34 ! 38 ! 35 39 ! 4182 2019-08-22 15:20:23Z scharf 36 40 ! Corrected "Former revisions" section 37 ! 41 ! 38 42 ! 4101 2019-07-17 15:14:26Z gronemeier 39 ! - consider 2*Km within diffusion criterion as Km is considered twice within 40 ! the diffusion of e, 41 ! - in RANS mode, instead of considering each wind component individually use 42 ! the wind speed of 3d wind vector in CFL criterion 43 ! - do not limit the increase of dt based on its previous value in RANS mode 43 ! - Consider 2*Km within diffusion criterion as Km is considered twice within the diffusion of e, 44 ! - in RANS mode, instead of considering each wind component individually use the wind speed of 3d 45 ! wind vector in CFL criterion 46 ! - Do not limit the increase of dt based on its previous value in RANS mode 44 47 ! 45 48 ! 3658 2019-01-07 20:28:54Z knoop … … 53 56 ! ------------ 54 57 !> Compute the time step under consideration of the FCL and diffusion criterion. 55 !------------------------------------------------------------------------------ !58 !--------------------------------------------------------------------------------------------------! 56 59 SUBROUTINE timestep 57 58 59 USE arrays_3d, & 60 ONLY: dzu, dzw, kh, km, u, u_stokes_zu, v, v_stokes_zu, w 61 62 USE control_parameters, & 63 ONLY: cfl_factor, dt_3d, dt_fixed, dt_max, galilei_transformation, & 64 message_string, rans_mode, stop_dt, timestep_reason, u_gtrans, & 65 use_ug_for_galilei_tr, v_gtrans 66 67 #if defined( __parallel ) 68 USE control_parameters, & 69 ONLY: coupling_mode, terminate_coupled, terminate_coupled_remote 70 #endif 71 72 USE cpulog, & 73 ONLY: cpu_log, log_point 74 75 USE grid_variables, & 76 ONLY: dx, dx2, dy, dy2 77 78 USE indices, & 79 ONLY: nxl, nxlg, nxr, nxrg, nyn, nyng, nys, nysg, nzb, nzt 60 61 62 USE arrays_3d, & 63 ONLY: dzu, & 64 dzw, & 65 kh, & 66 km, & 67 u, & 68 u_stokes_zu, & 69 v, & 70 v_stokes_zu, & 71 w 72 73 USE control_parameters, & 74 ONLY: cfl_factor, & 75 dt_3d, & 76 dt_fixed, & 77 dt_max, & 78 galilei_transformation, & 79 message_string, & 80 rans_mode, & 81 stop_dt, & 82 timestep_reason, & 83 u_gtrans, & 84 use_ug_for_galilei_tr, & 85 v_gtrans 86 87 #if defined( __parallel ) 88 USE control_parameters, & 89 ONLY: coupling_mode, & 90 terminate_coupled, & 91 terminate_coupled_remote 92 #endif 93 94 USE cpulog, & 95 ONLY: cpu_log, & 96 log_point 97 98 USE grid_variables, & 99 ONLY: dx, & 100 dx2, & 101 dy, & 102 dy2 103 104 USE indices, & 105 ONLY: nxl, & 106 nxlg, & 107 nxr, & 108 nxrg, & 109 nyn, & 110 nyng, & 111 nys, & 112 nysg, & 113 nzb, & 114 nzt 80 115 81 116 USE interfaces … … 83 118 USE kinds 84 119 85 USE bulk_cloud_model_mod, &120 USE bulk_cloud_model_mod, & 86 121 ONLY: dt_precipitation 87 122 88 123 USE pegrid 89 124 90 USE pmc_interface, &125 USE pmc_interface, & 91 126 ONLY: nested_run 92 127 93 USE statistics, & 94 ONLY: flow_statistics_called, hom, u_max, u_max_ijk, v_max, v_max_ijk,& 95 w_max, w_max_ijk 96 97 #if defined( __parallel ) 98 USE vertical_nesting_mod, & 99 ONLY: vnested, vnest_timestep_sync 128 USE statistics, & 129 ONLY: flow_statistics_called, & 130 hom, & 131 u_max, & 132 u_max_ijk, & 133 v_max, & 134 v_max_ijk, & 135 w_max, & 136 w_max_ijk 137 138 #if defined( __parallel ) 139 USE vertical_nesting_mod, & 140 ONLY: vnested, & 141 vnest_timestep_sync 100 142 #endif 101 143 102 144 IMPLICIT NONE 103 145 104 INTEGER(iwp) :: i !<105 INTEGER(iwp) :: j !<106 INTEGER(iwp) :: k !<146 INTEGER(iwp) :: i !< 147 INTEGER(iwp) :: j !< 148 INTEGER(iwp) :: k !< 107 149 INTEGER(iwp) :: km_max_ijk(3) = -1 !< index values (i,j,k) of location where km_max occurs 108 150 INTEGER(iwp) :: kh_max_ijk(3) = -1 !< index values (i,j,k) of location where kh_max occurs 109 151 110 LOGICAL :: stop_dt_local !< local switch for controlling the time stepping111 112 REAL(wp) :: div !<113 REAL(wp) :: dt_diff !<114 REAL(wp) :: dt_diff_l !<115 REAL(wp) :: dt_u !<116 REAL(wp) :: dt_u_l !<117 REAL(wp) :: dt_v !<118 REAL(wp) :: dt_v_l !<119 REAL(wp) :: dt_w !<120 REAL(wp) :: dt_w_l !<121 REAL(wp) :: km_max 122 REAL(wp) :: kh_max 123 REAL(wp) :: u_gtrans_l !<124 REAL(wp) :: v_gtrans_l !<125 126 REAL(wp), DIMENSION(2) :: uv_gtrans_l !<127 #if defined( __parallel ) 128 REAL(wp), DIMENSION(2) :: uv_gtrans !<129 REAL(wp), DIMENSION(3) :: reduce !<130 REAL(wp), DIMENSION(3) :: reduce_l !<131 #endif 132 REAL(wp), DIMENSION(nzb+1:nzt) :: dxyz2_min !<152 LOGICAL :: stop_dt_local !< local switch for controlling the time stepping 153 154 REAL(wp) :: div !< 155 REAL(wp) :: dt_diff !< 156 REAL(wp) :: dt_diff_l !< 157 REAL(wp) :: dt_u !< 158 REAL(wp) :: dt_u_l !< 159 REAL(wp) :: dt_v !< 160 REAL(wp) :: dt_v_l !< 161 REAL(wp) :: dt_w !< 162 REAL(wp) :: dt_w_l !< 163 REAL(wp) :: km_max !< maximum of Km in entire domain 164 REAL(wp) :: kh_max !< maximum of Kh in entire domain 165 REAL(wp) :: u_gtrans_l !< 166 REAL(wp) :: v_gtrans_l !< 167 168 REAL(wp), DIMENSION(2) :: uv_gtrans_l !< 169 #if defined( __parallel ) 170 REAL(wp), DIMENSION(2) :: uv_gtrans !< 171 REAL(wp), DIMENSION(3) :: reduce !< 172 REAL(wp), DIMENSION(3) :: reduce_l !< 173 #endif 174 REAL(wp), DIMENSION(nzb+1:nzt) :: dxyz2_min !< 133 175 !$ACC DECLARE CREATE(dxyz2_min) 134 176 … … 137 179 138 180 ! 139 !-- In case of Galilei-transform not using the geostrophic wind as translation 140 !-- velocity, compute the volume-averaged horizontal velocity components, which 141 !-- will then be subtracted from the horizontal wind for the time step and 142 !-- horizontal advection routines. 181 !-- In case of Galilei-transform not using the geostrophic wind as translation velocity, compute the 182 !-- volume-averaged horizontal velocity components, which will then be subtracted from the 183 !-- horizontal wind for the time step and horizontal advection routines. 143 184 IF ( galilei_transformation .AND. .NOT. use_ug_for_galilei_tr ) THEN 144 185 IF ( flow_statistics_called ) THEN 145 186 ! 146 !-- Horizontal averages already existent, just need to average them 147 !-- vertically. 187 !-- Horizontal averages already existent, just need to average them vertically. 148 188 u_gtrans = 0.0_wp 149 189 v_gtrans = 0.0_wp … … 152 192 v_gtrans = v_gtrans + hom(k,1,2,0) 153 193 ENDDO 154 u_gtrans = u_gtrans / REAL( nzt - nzb, KIND =wp )155 v_gtrans = v_gtrans / REAL( nzt - nzb, KIND =wp )194 u_gtrans = u_gtrans / REAL( nzt - nzb, KIND = wp ) 195 v_gtrans = v_gtrans / REAL( nzt - nzb, KIND = wp ) 156 196 ELSE 157 197 ! … … 167 207 ENDDO 168 208 ENDDO 169 uv_gtrans_l(1) = u_gtrans_l / & 170 REAL( (nxr-nxl+1)*(nyn-nys+1)*(nzt-nzb), KIND=wp ) 171 uv_gtrans_l(2) = v_gtrans_l / & 172 REAL( (nxr-nxl+1)*(nyn-nys+1)*(nzt-nzb), KIND=wp ) 209 uv_gtrans_l(1) = u_gtrans_l / REAL( (nxr-nxl+1) * (nyn-nys+1) * (nzt-nzb), KIND = wp ) 210 uv_gtrans_l(2) = v_gtrans_l / REAL( (nxr-nxl+1) * (nyn-nys+1) * (nzt-nzb), KIND = wp ) 173 211 #if defined( __parallel ) 174 212 IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) 175 CALL MPI_ALLREDUCE( uv_gtrans_l, uv_gtrans, 2, MPI_REAL, MPI_SUM, & 176 comm2d, ierr ) 177 u_gtrans = uv_gtrans(1) / REAL( numprocs, KIND=wp ) 178 v_gtrans = uv_gtrans(2) / REAL( numprocs, KIND=wp ) 213 CALL MPI_ALLREDUCE( uv_gtrans_l, uv_gtrans, 2, MPI_REAL, MPI_SUM, comm2d, ierr ) 214 u_gtrans = uv_gtrans(1) / REAL( numprocs, KIND = wp ) 215 v_gtrans = uv_gtrans(2) / REAL( numprocs, KIND = wp ) 179 216 #else 180 217 u_gtrans = uv_gtrans_l(1) … … 185 222 186 223 ! 187 !-- Determine the maxima of the velocity components, including their 188 !-- grid index positions. 189 CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, u, 'abs', 0.0_wp, & 190 u_max, u_max_ijk ) 191 CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, v, 'abs', 0.0_wp, & 192 v_max, v_max_ijk ) 193 CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, w, 'abs', 0.0_wp, & 194 w_max, w_max_ijk ) 224 !-- Determine the maxima of the velocity components, including their grid index positions. 225 CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, u, 'abs', 0.0_wp, u_max, u_max_ijk ) 226 CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, v, 'abs', 0.0_wp, v_max, v_max_ijk ) 227 CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, w, 'abs', 0.0_wp, w_max, w_max_ijk ) 195 228 196 229 IF ( .NOT. dt_fixed ) THEN … … 215 248 DO j = nys, nyn 216 249 DO k = nzb+1, nzt 217 dt_u_l = MIN( dt_u_l, ( dx / & 218 ( ABS( u(k,j,i) - u_gtrans + u_stokes_zu(k) ) & 219 + 1.0E-10_wp ) ) ) 220 dt_v_l = MIN( dt_v_l, ( dy / & 221 ( ABS( v(k,j,i) - v_gtrans + v_stokes_zu(k) ) & 222 + 1.0E-10_wp ) ) ) 223 dt_w_l = MIN( dt_w_l, ( dzu(k) / & 224 ( ABS( w(k,j,i) ) + 1.0E-10_wp ) ) ) 250 dt_u_l = MIN( dt_u_l, ( dx / ( ABS( u(k,j,i) - u_gtrans + u_stokes_zu(k) ) & 251 + 1.0E-10_wp ) ) ) 252 dt_v_l = MIN( dt_v_l, ( dy / ( ABS( v(k,j,i) - v_gtrans + v_stokes_zu(k) ) & 253 + 1.0E-10_wp ) ) ) 254 dt_w_l = MIN( dt_w_l, ( dzu(k) / ( ABS( w(k,j,i) ) + 1.0E-10_wp ) ) ) 225 255 ENDDO 226 256 ENDDO … … 230 260 ! 231 261 !-- Consider the wind speed at the scalar-grid point 232 !-- !> @note considering the wind speed instead of each individual wind 233 !-- !> component is only a workaround so far. This might has to be 234 !-- !> changed in the future. 262 !-- !> @note Considering the wind speed instead of each individual wind component is only a 263 !-- !> workaround so far. This has to be changed in the future. 235 264 236 265 !$ACC PARALLEL LOOP COLLAPSE(3) PRIVATE(i,j,k) & … … 243 272 DO j = nys, nyn 244 273 DO k = nzb+1, nzt 245 dt_u_l = MIN( dt_u_l, ( MIN( dx, dy, dzu(k) ) / ( & 246 SQRT( ( 0.5 * ( u(k,j,i) + u(k,j,i+1) ) - u_gtrans + u_stokes_zu(k) )**2 & 247 + ( 0.5 * ( v(k,j,i) + v(k,j+1,i) ) - v_gtrans + v_stokes_zu(k) )**2 & 248 + ( 0.5 * ( w(k,j,i) + w(k-1,j,i) ) )**2 ) & 249 + 1.0E-10_wp ) ) ) 274 dt_u_l = MIN( dt_u_l, ( MIN( dx, dy, dzu(k) ) / ( SQRT( & 275 ( 0.5 * ( u(k,j,i) + u(k,j,i+1) ) - u_gtrans + u_stokes_zu(k) )**2 & 276 + ( 0.5 * ( v(k,j,i) + v(k,j+1,i) ) - v_gtrans + v_stokes_zu(k) )**2 & 277 + ( 0.5 * ( w(k,j,i) + w(k-1,j,i) ) )**2 ) + 1.0E-10_wp ) ) ) 250 278 ENDDO 251 279 ENDDO 252 280 ENDDO 253 281 254 282 dt_v_l = dt_u_l 255 283 dt_w_l = dt_u_l … … 274 302 ! 275 303 !-- Compute time step according to the diffusion criterion. 276 !-- First calculate minimum grid spacing which only depends on index k. 277 !-- When using the dynamicsubgrid model, negative km are possible.304 !-- First calculate minimum grid spacing which only depends on index k. When using the dynamic 305 !-- subgrid model, negative km are possible. 278 306 dt_diff_l = 999999.0_wp 279 307 280 308 !$ACC PARALLEL LOOP PRESENT(dxyz2_min, dzw) 281 309 DO k = nzb+1, nzt 282 dxyz2_min(k) = MIN( dx2, dy2, dzw(k) *dzw(k) ) * 0.125_wp310 dxyz2_min(k) = MIN( dx2, dy2, dzw(k) * dzw(k) ) * 0.125_wp 283 311 ENDDO 284 312 … … 291 319 DO j = nys, nyn 292 320 DO k = nzb+1, nzt 293 dt_diff_l = MIN( dt_diff_l, & 294 dxyz2_min(k) / & 295 ( MAX( kh(k,j,i), 2.0_wp * ABS( km(k,j,i) ) ) & 296 + 1E-20_wp ) ) 321 dt_diff_l = MIN( dt_diff_l, dxyz2_min(k) / ( MAX( kh(k,j,i), 2.0_wp * & 322 ABS( km(k,j,i) ) ) + 1E-20_wp ) ) 297 323 ENDDO 298 324 ENDDO … … 301 327 #if defined( __parallel ) 302 328 IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) 303 CALL MPI_ALLREDUCE( dt_diff_l, dt_diff, 1, MPI_REAL, MPI_MIN, comm2d, & 304 ierr ) 329 CALL MPI_ALLREDUCE( dt_diff_l, dt_diff, 1, MPI_REAL, MPI_MIN, comm2d, ierr ) 305 330 #else 306 331 dt_diff = dt_diff_l … … 308 333 309 334 ! 310 !-- The time step is the minimum of the 3-4 components and the diffusion time 311 !-- step minus areduction (cfl_factor) to be on the safe side.335 !-- The time step is the minimum of the 3-4 components and the diffusion time step minus a 336 !-- reduction (cfl_factor) to be on the safe side. 312 337 !-- The time step must not exceed the maximum allowed value. 313 338 dt_3d = cfl_factor * MIN( dt_diff, dt_u, dt_v, dt_w, dt_precipitation ) … … 328 353 329 354 ! 330 !-- Determine the maxima of the diffusion coefficients, including their 331 !-- grid index positions. 332 CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, km, 'abs', & 333 0.0_wp, km_max, km_max_ijk ) 334 CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, kh, 'abs', & 335 0.0_wp, kh_max, kh_max_ijk ) 336 337 WRITE( message_string, * ) 'Time step has reached minimum limit.', & 338 '&dt = ', dt_3d, ' s Simulation is terminated.', & 339 '&dt_u = ', dt_u, ' s', & 340 '&dt_v = ', dt_v, ' s', & 341 '&dt_w = ', dt_w, ' s', & 342 '&dt_diff = ', dt_diff, ' s', & 343 '&u_max = ', u_max, ' m/s k=', u_max_ijk(1), & 344 ' j=', u_max_ijk(2), ' i=', u_max_ijk(3), & 345 '&v_max = ', v_max, ' m/s k=', v_max_ijk(1), & 346 ' j=', v_max_ijk(2), ' i=', v_max_ijk(3), & 347 '&w_max = ', w_max, ' m/s k=', w_max_ijk(1), & 348 ' j=', w_max_ijk(2), ' i=', w_max_ijk(3), & 349 '&km_max = ', km_max, ' m2/s2 k=', km_max_ijk(1), & 350 ' j=', km_max_ijk(2), ' i=', km_max_ijk(3), & 351 '&kh_max = ', kh_max, ' m2/s2 k=', kh_max_ijk(1), & 355 !-- Determine the maxima of the diffusion coefficients, including their grid index positions. 356 CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, km, 'abs', 0.0_wp, km_max, & 357 km_max_ijk ) 358 CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, kh, 'abs', 0.0_wp, kh_max, & 359 kh_max_ijk ) 360 361 WRITE( message_string, * ) 'Time step has reached minimum limit.', & 362 '&dt = ', dt_3d, ' s Simulation is terminated.', & 363 '&dt_u = ', dt_u, ' s', & 364 '&dt_v = ', dt_v, ' s', & 365 '&dt_w = ', dt_w, ' s', & 366 '&dt_diff = ', dt_diff, ' s', & 367 '&u_max = ', u_max, ' m/s k=', u_max_ijk(1), & 368 ' j=', u_max_ijk(2), ' i=', u_max_ijk(3), & 369 '&v_max = ', v_max, ' m/s k=', v_max_ijk(1), & 370 ' j=', v_max_ijk(2), ' i=', v_max_ijk(3), & 371 '&w_max = ', w_max, ' m/s k=', w_max_ijk(1), & 372 ' j=', w_max_ijk(2), ' i=', w_max_ijk(3), & 373 '&km_max = ', km_max, ' m2/s2 k=', km_max_ijk(1), & 374 ' j=', km_max_ijk(2), ' i=', km_max_ijk(3), & 375 '&kh_max = ', kh_max, ' m2/s2 k=', kh_max_ijk(1), & 352 376 ' j=', kh_max_ijk(2), ' i=', kh_max_ijk(3) 353 377 CALL message( 'timestep', 'PA0312', 0, 1, 0, 6, 0 ) 354 378 ! 355 !-- In case of coupled runs inform the remote model of the termination 356 !-- and its reason, provided the remote model has not already been357 !-- informed of another termination reason (terminate_coupled > 0) before.379 !-- In case of coupled runs inform the remote model of the termination and its reason, 380 !-- provided the remote model has not already been informed of another termination reason 381 !-- (terminate_coupled > 0). 358 382 #if defined( __parallel ) 359 383 IF ( coupling_mode /= 'uncoupled' .AND. terminate_coupled == 0 ) THEN 360 384 terminate_coupled = 2 361 385 IF ( myid == 0 ) THEN 362 CALL MPI_SENDRECV( & 363 terminate_coupled, 1, MPI_INTEGER, target_id, 0, & 364 terminate_coupled_remote, 1, MPI_INTEGER, target_id, 0, & 365 comm_inter, status, ierr ) 386 CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, target_id, 0, & 387 terminate_coupled_remote, 1, MPI_INTEGER, target_id, 0, & 388 comm_inter, status, ierr ) 366 389 ENDIF 367 CALL MPI_BCAST( terminate_coupled_remote, 1, MPI_INTEGER, 0, & 368 comm2d, ierr) 390 CALL MPI_BCAST( terminate_coupled_remote, 1, MPI_INTEGER, 0, comm2d, ierr) 369 391 ENDIF 370 392 #endif … … 372 394 373 395 ! 374 !-- In case of nested runs all parent/child processes have to terminate if 375 !-- one process has set the stop flag, i.e. they need to set the stop flag 376 !-- too. 396 !-- In case of nested runs all parent/child processes have to terminate if one process has set 397 !-- the stop flag, i.e. they need to set the stop flag too. 377 398 IF ( nested_run ) THEN 378 399 stop_dt_local = stop_dt 379 400 #if defined( __parallel ) 380 CALL MPI_ALLREDUCE( stop_dt_local, stop_dt, 1, MPI_LOGICAL, MPI_LOR, & 381 MPI_COMM_WORLD, ierr ) 401 CALL MPI_ALLREDUCE( stop_dt_local, stop_dt, 1, MPI_LOGICAL, MPI_LOR, MPI_COMM_WORLD, ierr ) 382 402 #endif 383 403 ENDIF … … 395 415 #if defined( __parallel ) 396 416 ! 397 !-- Vertical nesting: coarse and fine grid timestep has to be identical 417 !-- Vertical nesting: coarse and fine grid timestep has to be identical 398 418 IF ( vnested ) CALL vnest_timestep_sync 399 419 #endif
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