[1] | 1 | SUBROUTINE poismg( r ) |
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| 2 | |
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[1036] | 3 | !--------------------------------------------------------------------------------! |
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| 4 | ! This file is part of PALM. |
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| 5 | ! |
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| 6 | ! PALM is free software: you can redistribute it and/or modify it under the terms |
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| 7 | ! of the GNU General Public License as published by the Free Software Foundation, |
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| 8 | ! either version 3 of the License, or (at your option) any later version. |
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| 9 | ! |
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| 10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
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| 11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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| 12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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| 13 | ! |
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| 14 | ! You should have received a copy of the GNU General Public License along with |
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| 15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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| 16 | ! |
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| 17 | ! Copyright 1997-2012 Leibniz University Hannover |
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| 18 | !--------------------------------------------------------------------------------! |
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| 19 | ! |
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[1] | 20 | ! Attention: Loop unrolling and cache optimization in SOR-Red/Black method |
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[707] | 21 | ! still does not give the expected speedup! Further work required. |
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[1] | 22 | ! |
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[257] | 23 | ! Current revisions: |
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[1] | 24 | ! ----------------- |
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[1093] | 25 | ! |
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[708] | 26 | ! |
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| 27 | ! Former revisions: |
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| 28 | ! ----------------- |
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| 29 | ! $Id: poismg.f90 1160 2013-05-21 12:06:24Z heinze $ |
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| 30 | ! |
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[1160] | 31 | ! 1159 2013-05-21 11:58:22Z fricke |
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| 32 | ! bc_lr/ns_dirneu/neudir removed |
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| 33 | ! |
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[1093] | 34 | ! 1092 2013-02-02 11:24:22Z raasch |
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| 35 | ! unused variables removed |
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| 36 | ! |
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[1057] | 37 | ! 1056 2012-11-16 15:28:04Z raasch |
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| 38 | ! Bugfix: all ghost points have to be used for allocating p3 |
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| 39 | ! arrays p2, f2, and f2_l changed from allocatable to automatic |
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| 40 | ! |
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[1037] | 41 | ! 1036 2012-10-22 13:43:42Z raasch |
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| 42 | ! code put under GPL (PALM 3.9) |
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| 43 | ! |
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[997] | 44 | ! 996 2012-09-07 10:41:47Z raasch |
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| 45 | ! little reformatting |
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| 46 | ! |
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[979] | 47 | ! 978 2012-08-09 08:28:32Z fricke |
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| 48 | ! bc_lr/ns_dirneu/neudir added |
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| 49 | ! |
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[881] | 50 | ! 880 2012-04-13 06:28:59Z raasch |
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| 51 | ! Bugfix: preprocessor statements for parallel execution added |
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| 52 | ! |
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[779] | 53 | ! 778 2011-11-07 14:18:25Z fricke |
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| 54 | ! Allocation of p3 changes when multigrid is used and the collected field on PE0 |
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| 55 | ! has more grid points than the subdomain of an PE. |
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| 56 | ! |
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[708] | 57 | ! 707 2011-03-29 11:39:40Z raasch |
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[707] | 58 | ! p_loc is used instead of p in the main routine (poismg). |
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| 59 | ! On coarse grid levels, gathered data are identically processed on all PEs |
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| 60 | ! (before, on PE0 only), so that the subsequent scattering of data is not |
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| 61 | ! neccessary any more. |
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| 62 | ! bc_lr/ns replaced by bc_lr/ns_cyc/dirrad/raddir |
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| 63 | ! Bugfix: bottom (nzb) and top (nzt+1) boundary conditions set in routines |
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| 64 | ! resid and restrict. They were missed before which may have led to |
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| 65 | ! unpredictable results. |
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[1] | 66 | ! |
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[668] | 67 | ! 667 2010-12-23 12:06:00Z suehring/gryschka |
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| 68 | ! Calls of exchange_horiz are modified. |
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| 69 | ! |
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[623] | 70 | ! 622 2010-12-10 08:08:13Z raasch |
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| 71 | ! optional barriers included in order to speed up collective operations |
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| 72 | ! |
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[392] | 73 | ! 257 2009-03-11 15:17:42Z heinze |
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| 74 | ! Output of messages replaced by message handling routine. |
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| 75 | ! |
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[198] | 76 | ! 181 2008-07-30 07:07:47Z raasch |
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| 77 | ! Bugfix: grid_level+1 has to be used in restrict for flags-array |
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| 78 | ! |
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[139] | 79 | ! 114 2007-10-10 00:03:15Z raasch |
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| 80 | ! Boundary conditions at walls are implicitly set using flag arrays. Only |
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| 81 | ! Neumann BC is allowed. Upper walls are still not realized. |
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| 82 | ! Bottom and top BCs for array f_mg in restrict removed because boundary |
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| 83 | ! values are not needed (right hand side of SOR iteration). |
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| 84 | ! |
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[77] | 85 | ! 75 2007-03-22 09:54:05Z raasch |
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| 86 | ! 2nd+3rd argument removed from exchange horiz |
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| 87 | ! |
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[3] | 88 | ! RCS Log replace by Id keyword, revision history cleaned up |
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| 89 | ! |
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[1] | 90 | ! Revision 1.6 2005/03/26 20:55:54 raasch |
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| 91 | ! Implementation of non-cyclic (Neumann) horizontal boundary conditions, |
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| 92 | ! routine prolong simplified (one call of exchange_horiz spared) |
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| 93 | ! |
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| 94 | ! Revision 1.1 2001/07/20 13:10:51 raasch |
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| 95 | ! Initial revision |
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| 96 | ! |
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| 97 | ! |
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| 98 | ! Description: |
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| 99 | ! ------------ |
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| 100 | ! Solves the Poisson equation for the perturbation pressure with a multigrid |
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| 101 | ! V- or W-Cycle scheme. |
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| 102 | ! |
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| 103 | ! This multigrid method was originally developed for PALM by Joerg Uhlenbrock, |
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| 104 | ! September 2000 - July 2001. |
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| 105 | !------------------------------------------------------------------------------! |
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| 106 | |
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| 107 | USE arrays_3d |
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| 108 | USE control_parameters |
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| 109 | USE cpulog |
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| 110 | USE grid_variables |
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| 111 | USE indices |
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| 112 | USE interfaces |
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| 113 | USE pegrid |
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| 114 | |
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| 115 | IMPLICIT NONE |
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| 116 | |
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| 117 | REAL :: maxerror, maximum_mgcycles, residual_norm |
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| 118 | |
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[778] | 119 | REAL, DIMENSION(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) :: r |
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[1] | 120 | |
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| 121 | REAL, DIMENSION(:,:,:), ALLOCATABLE :: p3 |
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| 122 | |
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| 123 | |
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| 124 | CALL cpu_log( log_point_s(29), 'poismg', 'start' ) |
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| 125 | ! |
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| 126 | !-- Initialize arrays and variables used in this subroutine |
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| 127 | |
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[879] | 128 | !-- If the number of grid points of the gathered grid, which is collected |
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| 129 | !-- on PE0, is larger than the number of grid points of an PE, than array |
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| 130 | !-- p3 will be enlarged. |
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[778] | 131 | IF ( gathered_size > subdomain_size ) THEN |
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[879] | 132 | ALLOCATE( p3(nzb:nzt_mg(mg_switch_to_pe0_level)+1,nys_mg( & |
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| 133 | mg_switch_to_pe0_level)-1:nyn_mg(mg_switch_to_pe0_level)+1,& |
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| 134 | nxl_mg(mg_switch_to_pe0_level)-1:nxr_mg( & |
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[778] | 135 | mg_switch_to_pe0_level)+1) ) |
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| 136 | ELSE |
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[1056] | 137 | ALLOCATE ( p3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) ) |
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[778] | 138 | ENDIF |
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[1056] | 139 | |
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| 140 | p3 = 0.0 |
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[879] | 141 | |
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[1] | 142 | ! |
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[707] | 143 | !-- Ghost boundaries have to be added to divergence array. |
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| 144 | !-- Exchange routine needs to know the grid level! |
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| 145 | grid_level = maximum_grid_level |
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[667] | 146 | CALL exchange_horiz( d, 1) |
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[1] | 147 | d(nzb,:,:) = d(nzb+1,:,:) |
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| 148 | |
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| 149 | ! |
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| 150 | !-- Initiation of the multigrid scheme. Does n cycles until the |
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| 151 | !-- residual is smaller than the given limit. The accuracy of the solution |
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| 152 | !-- of the poisson equation will increase with the number of cycles. |
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| 153 | !-- If the number of cycles is preset by the user, this number will be |
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| 154 | !-- carried out regardless of the accuracy. |
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[707] | 155 | grid_level_count = 0 |
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| 156 | mgcycles = 0 |
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[1] | 157 | IF ( mg_cycles == -1 ) THEN |
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| 158 | maximum_mgcycles = 0 |
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| 159 | residual_norm = 1.0 |
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| 160 | ELSE |
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| 161 | maximum_mgcycles = mg_cycles |
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| 162 | residual_norm = 0.0 |
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| 163 | ENDIF |
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| 164 | |
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| 165 | DO WHILE ( residual_norm > residual_limit .OR. & |
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| 166 | mgcycles < maximum_mgcycles ) |
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[778] | 167 | |
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| 168 | CALL next_mg_level( d, p_loc, p3, r) |
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[1] | 169 | |
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| 170 | ! |
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| 171 | !-- Calculate the residual if the user has not preset the number of |
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| 172 | !-- cycles to be performed |
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| 173 | IF ( maximum_mgcycles == 0 ) THEN |
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[707] | 174 | CALL resid( d, p_loc, r ) |
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[1] | 175 | maxerror = SUM( r(nzb+1:nzt,nys:nyn,nxl:nxr)**2 ) |
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[778] | 176 | |
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[1] | 177 | #if defined( __parallel ) |
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[622] | 178 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
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[778] | 179 | CALL MPI_ALLREDUCE( maxerror, residual_norm, 1, MPI_REAL, MPI_SUM, & |
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[1] | 180 | comm2d, ierr) |
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| 181 | #else |
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[778] | 182 | residual_norm = maxerror |
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[1] | 183 | #endif |
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| 184 | residual_norm = SQRT( residual_norm ) |
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| 185 | ENDIF |
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| 186 | |
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| 187 | mgcycles = mgcycles + 1 |
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| 188 | |
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| 189 | ! |
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| 190 | !-- If the user has not limited the number of cycles, stop the run in case |
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| 191 | !-- of insufficient convergence |
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| 192 | IF ( mgcycles > 1000 .AND. mg_cycles == -1 ) THEN |
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[257] | 193 | message_string = 'no sufficient convergence within 1000 cycles' |
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| 194 | CALL message( 'poismg', 'PA0283', 1, 2, 0, 6, 0 ) |
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[1] | 195 | ENDIF |
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| 196 | |
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| 197 | ENDDO |
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| 198 | |
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| 199 | DEALLOCATE( p3 ) |
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| 200 | |
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[707] | 201 | ! |
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| 202 | !-- Unset the grid level. Variable is used to determine the MPI datatypes for |
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| 203 | !-- ghost point exchange |
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| 204 | grid_level = 0 |
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| 205 | |
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[1] | 206 | CALL cpu_log( log_point_s(29), 'poismg', 'stop' ) |
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| 207 | |
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| 208 | END SUBROUTINE poismg |
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| 209 | |
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| 210 | |
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| 211 | |
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| 212 | SUBROUTINE resid( f_mg, p_mg, r ) |
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| 213 | |
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| 214 | !------------------------------------------------------------------------------! |
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| 215 | ! Description: |
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| 216 | ! ------------ |
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| 217 | ! Computes the residual of the perturbation pressure. |
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| 218 | !------------------------------------------------------------------------------! |
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| 219 | |
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| 220 | USE arrays_3d |
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| 221 | USE control_parameters |
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| 222 | USE grid_variables |
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| 223 | USE indices |
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| 224 | USE pegrid |
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| 225 | |
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| 226 | IMPLICIT NONE |
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| 227 | |
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| 228 | INTEGER :: i, j, k, l |
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| 229 | |
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| 230 | REAL, DIMENSION(nzb:nzt_mg(grid_level)+1, & |
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| 231 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
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| 232 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: f_mg, p_mg, r |
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| 233 | |
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| 234 | ! |
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| 235 | !-- Calculate the residual |
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| 236 | l = grid_level |
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| 237 | |
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[114] | 238 | ! |
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| 239 | !-- Choose flag array of this level |
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| 240 | SELECT CASE ( l ) |
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| 241 | CASE ( 1 ) |
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| 242 | flags => wall_flags_1 |
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| 243 | CASE ( 2 ) |
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| 244 | flags => wall_flags_2 |
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| 245 | CASE ( 3 ) |
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| 246 | flags => wall_flags_3 |
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| 247 | CASE ( 4 ) |
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| 248 | flags => wall_flags_4 |
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| 249 | CASE ( 5 ) |
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| 250 | flags => wall_flags_5 |
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| 251 | CASE ( 6 ) |
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| 252 | flags => wall_flags_6 |
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| 253 | CASE ( 7 ) |
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| 254 | flags => wall_flags_7 |
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| 255 | CASE ( 8 ) |
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| 256 | flags => wall_flags_8 |
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| 257 | CASE ( 9 ) |
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| 258 | flags => wall_flags_9 |
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| 259 | CASE ( 10 ) |
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| 260 | flags => wall_flags_10 |
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| 261 | END SELECT |
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| 262 | |
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[1] | 263 | !$OMP PARALLEL PRIVATE (i,j,k) |
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| 264 | !$OMP DO |
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| 265 | DO i = nxl_mg(l), nxr_mg(l) |
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| 266 | DO j = nys_mg(l), nyn_mg(l) |
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| 267 | DO k = nzb+1, nzt_mg(l) |
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[114] | 268 | r(k,j,i) = f_mg(k,j,i) & |
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| 269 | - ddx2_mg(l) * & |
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| 270 | ( p_mg(k,j,i+1) + IBITS( flags(k,j,i), 5, 1 ) * & |
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| 271 | ( p_mg(k,j,i) - p_mg(k,j,i+1) ) + & |
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| 272 | p_mg(k,j,i-1) + IBITS( flags(k,j,i), 4, 1 ) * & |
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| 273 | ( p_mg(k,j,i) - p_mg(k,j,i-1) ) ) & |
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| 274 | - ddy2_mg(l) * & |
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| 275 | ( p_mg(k,j+1,i) + IBITS( flags(k,j,i), 3, 1 ) * & |
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| 276 | ( p_mg(k,j,i) - p_mg(k,j+1,i) ) + & |
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| 277 | p_mg(k,j-1,i) + IBITS( flags(k,j,i), 2, 1 ) * & |
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| 278 | ( p_mg(k,j,i) - p_mg(k,j-1,i) ) ) & |
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| 279 | - f2_mg(k,l) * p_mg(k+1,j,i) & |
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| 280 | - f3_mg(k,l) * & |
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| 281 | ( p_mg(k-1,j,i) + IBITS( flags(k,j,i), 0, 1 ) * & |
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| 282 | ( p_mg(k,j,i) - p_mg(k-1,j,i) ) ) & |
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[1] | 283 | + f1_mg(k,l) * p_mg(k,j,i) |
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[114] | 284 | ! |
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| 285 | !-- Residual within topography should be zero |
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| 286 | r(k,j,i) = r(k,j,i) * ( 1.0 - IBITS( flags(k,j,i), 6, 1 ) ) |
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[1] | 287 | ENDDO |
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| 288 | ENDDO |
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| 289 | ENDDO |
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| 290 | !$OMP END PARALLEL |
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| 291 | |
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| 292 | ! |
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| 293 | !-- Horizontal boundary conditions |
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[667] | 294 | CALL exchange_horiz( r, 1) |
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[1] | 295 | |
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[707] | 296 | IF ( .NOT. bc_lr_cyc ) THEN |
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[1] | 297 | IF ( inflow_l .OR. outflow_l ) r(:,:,nxl_mg(l)-1) = r(:,:,nxl_mg(l)) |
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| 298 | IF ( inflow_r .OR. outflow_r ) r(:,:,nxr_mg(l)+1) = r(:,:,nxr_mg(l)) |
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| 299 | ENDIF |
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| 300 | |
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[707] | 301 | IF ( .NOT. bc_ns_cyc ) THEN |
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[1] | 302 | IF ( inflow_n .OR. outflow_n ) r(:,nyn_mg(l)+1,:) = r(:,nyn_mg(l),:) |
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| 303 | IF ( inflow_s .OR. outflow_s ) r(:,nys_mg(l)-1,:) = r(:,nys_mg(l),:) |
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| 304 | ENDIF |
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| 305 | |
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| 306 | ! |
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[707] | 307 | !-- Boundary conditions at bottom and top of the domain. |
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| 308 | !-- These points are not handled by the above loop. Points may be within |
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| 309 | !-- buildings, but that doesn't matter. |
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| 310 | IF ( ibc_p_b == 1 ) THEN |
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| 311 | r(nzb,:,: ) = r(nzb+1,:,:) |
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| 312 | ELSE |
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| 313 | r(nzb,:,: ) = 0.0 |
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| 314 | ENDIF |
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| 315 | |
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[1] | 316 | IF ( ibc_p_t == 1 ) THEN |
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| 317 | r(nzt_mg(l)+1,:,: ) = r(nzt_mg(l),:,:) |
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| 318 | ELSE |
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| 319 | r(nzt_mg(l)+1,:,: ) = 0.0 |
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| 320 | ENDIF |
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| 321 | |
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| 322 | |
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| 323 | END SUBROUTINE resid |
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| 324 | |
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| 325 | |
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| 326 | |
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| 327 | SUBROUTINE restrict( f_mg, r ) |
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| 328 | |
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| 329 | !------------------------------------------------------------------------------! |
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| 330 | ! Description: |
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| 331 | ! ------------ |
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| 332 | ! Interpolates the residual on the next coarser grid with "full weighting" |
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| 333 | ! scheme |
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| 334 | !------------------------------------------------------------------------------! |
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| 335 | |
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| 336 | USE control_parameters |
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| 337 | USE grid_variables |
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| 338 | USE indices |
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| 339 | USE pegrid |
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| 340 | |
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| 341 | IMPLICIT NONE |
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| 342 | |
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| 343 | INTEGER :: i, ic, j, jc, k, kc, l |
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| 344 | |
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[114] | 345 | REAL :: rkjim, rkjip, rkjmi, rkjmim, rkjmip, rkjpi, rkjpim, rkjpip, & |
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| 346 | rkmji, rkmjim, rkmjip, rkmjmi, rkmjmim, rkmjmip, rkmjpi, rkmjpim, & |
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| 347 | rkmjpip |
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| 348 | |
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[1] | 349 | REAL, DIMENSION(nzb:nzt_mg(grid_level)+1, & |
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| 350 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
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| 351 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: f_mg |
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| 352 | |
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| 353 | REAL, DIMENSION(nzb:nzt_mg(grid_level+1)+1, & |
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| 354 | nys_mg(grid_level+1)-1:nyn_mg(grid_level+1)+1, & |
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| 355 | nxl_mg(grid_level+1)-1:nxr_mg(grid_level+1)+1) :: r |
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| 356 | |
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| 357 | ! |
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| 358 | !-- Interpolate the residual |
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| 359 | l = grid_level |
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| 360 | |
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[114] | 361 | ! |
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| 362 | !-- Choose flag array of the upper level |
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[181] | 363 | SELECT CASE ( l+1 ) |
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[114] | 364 | CASE ( 1 ) |
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| 365 | flags => wall_flags_1 |
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| 366 | CASE ( 2 ) |
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| 367 | flags => wall_flags_2 |
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| 368 | CASE ( 3 ) |
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| 369 | flags => wall_flags_3 |
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| 370 | CASE ( 4 ) |
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| 371 | flags => wall_flags_4 |
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| 372 | CASE ( 5 ) |
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| 373 | flags => wall_flags_5 |
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| 374 | CASE ( 6 ) |
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| 375 | flags => wall_flags_6 |
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| 376 | CASE ( 7 ) |
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| 377 | flags => wall_flags_7 |
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| 378 | CASE ( 8 ) |
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| 379 | flags => wall_flags_8 |
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| 380 | CASE ( 9 ) |
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| 381 | flags => wall_flags_9 |
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| 382 | CASE ( 10 ) |
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| 383 | flags => wall_flags_10 |
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| 384 | END SELECT |
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| 385 | |
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[1] | 386 | !$OMP PARALLEL PRIVATE (i,j,k,ic,jc,kc) |
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| 387 | !$OMP DO |
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| 388 | DO ic = nxl_mg(l), nxr_mg(l) |
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| 389 | i = 2*ic |
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| 390 | DO jc = nys_mg(l), nyn_mg(l) |
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| 391 | j = 2*jc |
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| 392 | DO kc = nzb+1, nzt_mg(l) |
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| 393 | k = 2*kc-1 |
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[114] | 394 | ! |
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| 395 | !-- Use implicit Neumann BCs if the respective gridpoint is inside |
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| 396 | !-- the building |
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| 397 | rkjim = r(k,j,i-1) + IBITS( flags(k,j,i-1), 6, 1 ) * & |
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| 398 | ( r(k,j,i) - r(k,j,i-1) ) |
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| 399 | rkjip = r(k,j,i+1) + IBITS( flags(k,j,i+1), 6, 1 ) * & |
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| 400 | ( r(k,j,i) - r(k,j,i+1) ) |
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| 401 | rkjpi = r(k,j+1,i) + IBITS( flags(k,j+1,i), 6, 1 ) * & |
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| 402 | ( r(k,j,i) - r(k,j+1,i) ) |
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| 403 | rkjmi = r(k,j-1,i) + IBITS( flags(k,j-1,i), 6, 1 ) * & |
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| 404 | ( r(k,j,i) - r(k,j-1,i) ) |
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| 405 | rkjmim = r(k,j-1,i-1) + IBITS( flags(k,j-1,i-1), 6, 1 ) * & |
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| 406 | ( r(k,j,i) - r(k,j-1,i-1) ) |
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| 407 | rkjpim = r(k,j+1,i-1) + IBITS( flags(k,j+1,i-1), 6, 1 ) * & |
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| 408 | ( r(k,j,i) - r(k,j+1,i-1) ) |
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| 409 | rkjmip = r(k,j-1,i+1) + IBITS( flags(k,j-1,i+1), 6, 1 ) * & |
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| 410 | ( r(k,j,i) - r(k,j-1,i+1) ) |
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| 411 | rkjpip = r(k,j+1,i+1) + IBITS( flags(k,j+1,i+1), 6, 1 ) * & |
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| 412 | ( r(k,j,i) - r(k,j+1,i+1) ) |
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| 413 | rkmji = r(k-1,j,i) + IBITS( flags(k-1,j,i), 6, 1 ) * & |
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| 414 | ( r(k,j,i) - r(k-1,j,i) ) |
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| 415 | rkmjim = r(k-1,j,i-1) + IBITS( flags(k-1,j,i-1), 6, 1 ) * & |
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| 416 | ( r(k,j,i) - r(k-1,j,i-1) ) |
---|
| 417 | rkmjip = r(k-1,j,i+1) + IBITS( flags(k-1,j,i+1), 6, 1 ) * & |
---|
| 418 | ( r(k,j,i) - r(k-1,j,i+1) ) |
---|
| 419 | rkmjpi = r(k-1,j+1,i) + IBITS( flags(k-1,j+1,i), 6, 1 ) * & |
---|
| 420 | ( r(k,j,i) - r(k-1,j+1,i) ) |
---|
| 421 | rkmjmi = r(k-1,j-1,i) + IBITS( flags(k-1,j-1,i), 6, 1 ) * & |
---|
| 422 | ( r(k,j,i) - r(k-1,j-1,i) ) |
---|
| 423 | rkmjmim = r(k-1,j-1,i-1) + IBITS( flags(k-1,j-1,i-1), 6, 1 ) * & |
---|
| 424 | ( r(k,j,i) - r(k-1,j-1,i-1) ) |
---|
| 425 | rkmjpim = r(k-1,j+1,i-1) + IBITS( flags(k-1,j+1,i-1), 6, 1 ) * & |
---|
| 426 | ( r(k,j,i) - r(k-1,j+1,i-1) ) |
---|
| 427 | rkmjmip = r(k-1,j-1,i+1) + IBITS( flags(k-1,j-1,i+1), 6, 1 ) * & |
---|
| 428 | ( r(k,j,i) - r(k-1,j-1,i+1) ) |
---|
| 429 | rkmjpip = r(k-1,j+1,i+1) + IBITS( flags(k-1,j+1,i+1), 6, 1 ) * & |
---|
| 430 | ( r(k,j,i) - r(k-1,j+1,i+1) ) |
---|
| 431 | |
---|
[1] | 432 | f_mg(kc,jc,ic) = 1.0 / 64.0 * ( & |
---|
| 433 | 8.0 * r(k,j,i) & |
---|
[114] | 434 | + 4.0 * ( rkjim + rkjip + & |
---|
| 435 | rkjpi + rkjmi ) & |
---|
| 436 | + 2.0 * ( rkjmim + rkjpim + & |
---|
| 437 | rkjmip + rkjpip ) & |
---|
| 438 | + 4.0 * rkmji & |
---|
| 439 | + 2.0 * ( rkmjim + rkmjim + & |
---|
| 440 | rkmjpi + rkmjmi ) & |
---|
| 441 | + ( rkmjmim + rkmjpim + & |
---|
| 442 | rkmjmip + rkmjpip ) & |
---|
[1] | 443 | + 4.0 * r(k+1,j,i) & |
---|
| 444 | + 2.0 * ( r(k+1,j,i-1) + r(k+1,j,i+1) + & |
---|
| 445 | r(k+1,j+1,i) + r(k+1,j-1,i) ) & |
---|
| 446 | + ( r(k+1,j-1,i-1) + r(k+1,j+1,i-1) + & |
---|
| 447 | r(k+1,j-1,i+1) + r(k+1,j+1,i+1) ) & |
---|
| 448 | ) |
---|
[114] | 449 | |
---|
| 450 | ! f_mg(kc,jc,ic) = 1.0 / 64.0 * ( & |
---|
| 451 | ! 8.0 * r(k,j,i) & |
---|
| 452 | ! + 4.0 * ( r(k,j,i-1) + r(k,j,i+1) + & |
---|
| 453 | ! r(k,j+1,i) + r(k,j-1,i) ) & |
---|
| 454 | ! + 2.0 * ( r(k,j-1,i-1) + r(k,j+1,i-1) + & |
---|
| 455 | ! r(k,j-1,i+1) + r(k,j+1,i+1) ) & |
---|
| 456 | ! + 4.0 * r(k-1,j,i) & |
---|
| 457 | ! + 2.0 * ( r(k-1,j,i-1) + r(k-1,j,i+1) + & |
---|
| 458 | ! r(k-1,j+1,i) + r(k-1,j-1,i) ) & |
---|
| 459 | ! + ( r(k-1,j-1,i-1) + r(k-1,j+1,i-1) + & |
---|
| 460 | ! r(k-1,j-1,i+1) + r(k-1,j+1,i+1) ) & |
---|
| 461 | ! + 4.0 * r(k+1,j,i) & |
---|
| 462 | ! + 2.0 * ( r(k+1,j,i-1) + r(k+1,j,i+1) + & |
---|
| 463 | ! r(k+1,j+1,i) + r(k+1,j-1,i) ) & |
---|
| 464 | ! + ( r(k+1,j-1,i-1) + r(k+1,j+1,i-1) + & |
---|
| 465 | ! r(k+1,j-1,i+1) + r(k+1,j+1,i+1) ) & |
---|
| 466 | ! ) |
---|
[1] | 467 | ENDDO |
---|
| 468 | ENDDO |
---|
| 469 | ENDDO |
---|
| 470 | !$OMP END PARALLEL |
---|
| 471 | |
---|
| 472 | ! |
---|
| 473 | !-- Horizontal boundary conditions |
---|
[667] | 474 | CALL exchange_horiz( f_mg, 1) |
---|
[1] | 475 | |
---|
[707] | 476 | IF ( .NOT. bc_lr_cyc ) THEN |
---|
[1] | 477 | IF (inflow_l .OR. outflow_l) f_mg(:,:,nxl_mg(l)-1) = f_mg(:,:,nxl_mg(l)) |
---|
| 478 | IF (inflow_r .OR. outflow_r) f_mg(:,:,nxr_mg(l)+1) = f_mg(:,:,nxr_mg(l)) |
---|
| 479 | ENDIF |
---|
| 480 | |
---|
[707] | 481 | IF ( .NOT. bc_ns_cyc ) THEN |
---|
[1] | 482 | IF (inflow_n .OR. outflow_n) f_mg(:,nyn_mg(l)+1,:) = f_mg(:,nyn_mg(l),:) |
---|
| 483 | IF (inflow_s .OR. outflow_s) f_mg(:,nys_mg(l)-1,:) = f_mg(:,nys_mg(l),:) |
---|
| 484 | ENDIF |
---|
| 485 | |
---|
| 486 | ! |
---|
[707] | 487 | !-- Boundary conditions at bottom and top of the domain. |
---|
| 488 | !-- These points are not handled by the above loop. Points may be within |
---|
| 489 | !-- buildings, but that doesn't matter. |
---|
| 490 | IF ( ibc_p_b == 1 ) THEN |
---|
| 491 | f_mg(nzb,:,: ) = f_mg(nzb+1,:,:) |
---|
| 492 | ELSE |
---|
| 493 | f_mg(nzb,:,: ) = 0.0 |
---|
| 494 | ENDIF |
---|
[1] | 495 | |
---|
[707] | 496 | IF ( ibc_p_t == 1 ) THEN |
---|
| 497 | f_mg(nzt_mg(l)+1,:,: ) = f_mg(nzt_mg(l),:,:) |
---|
| 498 | ELSE |
---|
| 499 | f_mg(nzt_mg(l)+1,:,: ) = 0.0 |
---|
| 500 | ENDIF |
---|
[1] | 501 | |
---|
[707] | 502 | |
---|
[1] | 503 | END SUBROUTINE restrict |
---|
| 504 | |
---|
| 505 | |
---|
| 506 | |
---|
| 507 | SUBROUTINE prolong( p, temp ) |
---|
| 508 | |
---|
| 509 | !------------------------------------------------------------------------------! |
---|
| 510 | ! Description: |
---|
| 511 | ! ------------ |
---|
| 512 | ! Interpolates the correction of the perturbation pressure |
---|
| 513 | ! to the next finer grid. |
---|
| 514 | !------------------------------------------------------------------------------! |
---|
| 515 | |
---|
| 516 | USE control_parameters |
---|
| 517 | USE pegrid |
---|
| 518 | USE indices |
---|
| 519 | |
---|
| 520 | IMPLICIT NONE |
---|
| 521 | |
---|
| 522 | INTEGER :: i, j, k, l |
---|
| 523 | |
---|
| 524 | REAL, DIMENSION(nzb:nzt_mg(grid_level-1)+1, & |
---|
| 525 | nys_mg(grid_level-1)-1:nyn_mg(grid_level-1)+1, & |
---|
| 526 | nxl_mg(grid_level-1)-1:nxr_mg(grid_level-1)+1 ) :: p |
---|
| 527 | |
---|
| 528 | REAL, DIMENSION(nzb:nzt_mg(grid_level)+1, & |
---|
| 529 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
---|
| 530 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: temp |
---|
| 531 | |
---|
| 532 | |
---|
| 533 | ! |
---|
| 534 | !-- First, store elements of the coarser grid on the next finer grid |
---|
| 535 | l = grid_level |
---|
| 536 | |
---|
| 537 | !$OMP PARALLEL PRIVATE (i,j,k) |
---|
| 538 | !$OMP DO |
---|
| 539 | DO i = nxl_mg(l-1), nxr_mg(l-1) |
---|
| 540 | DO j = nys_mg(l-1), nyn_mg(l-1) |
---|
| 541 | !CDIR NODEP |
---|
| 542 | DO k = nzb+1, nzt_mg(l-1) |
---|
| 543 | ! |
---|
| 544 | !-- Points of the coarse grid are directly stored on the next finer |
---|
| 545 | !-- grid |
---|
| 546 | temp(2*k-1,2*j,2*i) = p(k,j,i) |
---|
| 547 | ! |
---|
| 548 | !-- Points between two coarse-grid points |
---|
| 549 | temp(2*k-1,2*j,2*i+1) = 0.5 * ( p(k,j,i) + p(k,j,i+1) ) |
---|
| 550 | temp(2*k-1,2*j+1,2*i) = 0.5 * ( p(k,j,i) + p(k,j+1,i) ) |
---|
| 551 | temp(2*k,2*j,2*i) = 0.5 * ( p(k,j,i) + p(k+1,j,i) ) |
---|
| 552 | ! |
---|
| 553 | !-- Points in the center of the planes stretched by four points |
---|
| 554 | !-- of the coarse grid cube |
---|
| 555 | temp(2*k-1,2*j+1,2*i+1) = 0.25 * ( p(k,j,i) + p(k,j,i+1) + & |
---|
| 556 | p(k,j+1,i) + p(k,j+1,i+1) ) |
---|
| 557 | temp(2*k,2*j,2*i+1) = 0.25 * ( p(k,j,i) + p(k,j,i+1) + & |
---|
| 558 | p(k+1,j,i) + p(k+1,j,i+1) ) |
---|
| 559 | temp(2*k,2*j+1,2*i) = 0.25 * ( p(k,j,i) + p(k,j+1,i) + & |
---|
| 560 | p(k+1,j,i) + p(k+1,j+1,i) ) |
---|
| 561 | ! |
---|
| 562 | !-- Points in the middle of coarse grid cube |
---|
| 563 | temp(2*k,2*j+1,2*i+1) = 0.125 * ( p(k,j,i) + p(k,j,i+1) + & |
---|
| 564 | p(k,j+1,i) + p(k,j+1,i+1) + & |
---|
| 565 | p(k+1,j,i) + p(k+1,j,i+1) + & |
---|
| 566 | p(k+1,j+1,i) + p(k+1,j+1,i+1) ) |
---|
| 567 | ENDDO |
---|
| 568 | ENDDO |
---|
| 569 | ENDDO |
---|
| 570 | !$OMP END PARALLEL |
---|
| 571 | |
---|
| 572 | ! |
---|
| 573 | !-- Horizontal boundary conditions |
---|
[667] | 574 | CALL exchange_horiz( temp, 1) |
---|
[1] | 575 | |
---|
[707] | 576 | IF ( .NOT. bc_lr_cyc ) THEN |
---|
[1] | 577 | IF (inflow_l .OR. outflow_l) temp(:,:,nxl_mg(l)-1) = temp(:,:,nxl_mg(l)) |
---|
| 578 | IF (inflow_r .OR. outflow_r) temp(:,:,nxr_mg(l)+1) = temp(:,:,nxr_mg(l)) |
---|
| 579 | ENDIF |
---|
| 580 | |
---|
[707] | 581 | IF ( .NOT. bc_ns_cyc ) THEN |
---|
[1] | 582 | IF (inflow_n .OR. outflow_n) temp(:,nyn_mg(l)+1,:) = temp(:,nyn_mg(l),:) |
---|
| 583 | IF (inflow_s .OR. outflow_s) temp(:,nys_mg(l)-1,:) = temp(:,nys_mg(l),:) |
---|
| 584 | ENDIF |
---|
| 585 | |
---|
| 586 | ! |
---|
| 587 | !-- Bottom and top boundary conditions |
---|
| 588 | IF ( ibc_p_b == 1 ) THEN |
---|
| 589 | temp(nzb,:,: ) = temp(nzb+1,:,:) |
---|
| 590 | ELSE |
---|
| 591 | temp(nzb,:,: ) = 0.0 |
---|
| 592 | ENDIF |
---|
| 593 | |
---|
| 594 | IF ( ibc_p_t == 1 ) THEN |
---|
| 595 | temp(nzt_mg(l)+1,:,: ) = temp(nzt_mg(l),:,:) |
---|
| 596 | ELSE |
---|
| 597 | temp(nzt_mg(l)+1,:,: ) = 0.0 |
---|
| 598 | ENDIF |
---|
| 599 | |
---|
| 600 | |
---|
| 601 | END SUBROUTINE prolong |
---|
| 602 | |
---|
| 603 | |
---|
| 604 | SUBROUTINE redblack( f_mg, p_mg ) |
---|
| 605 | |
---|
| 606 | !------------------------------------------------------------------------------! |
---|
| 607 | ! Description: |
---|
| 608 | ! ------------ |
---|
| 609 | ! Relaxation method for the multigrid scheme. A Gauss-Seidel iteration with |
---|
| 610 | ! 3D-Red-Black decomposition (GS-RB) is used. |
---|
| 611 | !------------------------------------------------------------------------------! |
---|
| 612 | |
---|
| 613 | USE arrays_3d |
---|
| 614 | USE control_parameters |
---|
| 615 | USE cpulog |
---|
| 616 | USE grid_variables |
---|
| 617 | USE indices |
---|
| 618 | USE interfaces |
---|
| 619 | USE pegrid |
---|
| 620 | |
---|
| 621 | IMPLICIT NONE |
---|
| 622 | |
---|
| 623 | INTEGER :: colour, i, ic, j, jc, jj, k, l, n |
---|
| 624 | |
---|
| 625 | LOGICAL :: unroll |
---|
| 626 | |
---|
[114] | 627 | REAL :: wall_left, wall_north, wall_right, wall_south, wall_total, wall_top |
---|
| 628 | |
---|
[1] | 629 | REAL, DIMENSION(nzb:nzt_mg(grid_level)+1, & |
---|
| 630 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
---|
| 631 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: f_mg, p_mg |
---|
| 632 | |
---|
| 633 | l = grid_level |
---|
| 634 | |
---|
[114] | 635 | ! |
---|
| 636 | !-- Choose flag array of this level |
---|
| 637 | SELECT CASE ( l ) |
---|
| 638 | CASE ( 1 ) |
---|
| 639 | flags => wall_flags_1 |
---|
| 640 | CASE ( 2 ) |
---|
| 641 | flags => wall_flags_2 |
---|
| 642 | CASE ( 3 ) |
---|
| 643 | flags => wall_flags_3 |
---|
| 644 | CASE ( 4 ) |
---|
| 645 | flags => wall_flags_4 |
---|
| 646 | CASE ( 5 ) |
---|
| 647 | flags => wall_flags_5 |
---|
| 648 | CASE ( 6 ) |
---|
| 649 | flags => wall_flags_6 |
---|
| 650 | CASE ( 7 ) |
---|
| 651 | flags => wall_flags_7 |
---|
| 652 | CASE ( 8 ) |
---|
| 653 | flags => wall_flags_8 |
---|
| 654 | CASE ( 9 ) |
---|
| 655 | flags => wall_flags_9 |
---|
| 656 | CASE ( 10 ) |
---|
| 657 | flags => wall_flags_10 |
---|
| 658 | END SELECT |
---|
| 659 | |
---|
[1] | 660 | unroll = ( MOD( nyn_mg(l)-nys_mg(l)+1, 4 ) == 0 .AND. & |
---|
| 661 | MOD( nxr_mg(l)-nxl_mg(l)+1, 2 ) == 0 ) |
---|
| 662 | |
---|
| 663 | DO n = 1, ngsrb |
---|
| 664 | |
---|
| 665 | DO colour = 1, 2 |
---|
| 666 | |
---|
| 667 | IF ( .NOT. unroll ) THEN |
---|
[778] | 668 | |
---|
[1] | 669 | CALL cpu_log( log_point_s(36), 'redblack_no_unroll', 'start' ) |
---|
| 670 | |
---|
| 671 | ! |
---|
| 672 | !-- Without unrolling of loops, no cache optimization |
---|
| 673 | DO i = nxl_mg(l), nxr_mg(l), 2 |
---|
| 674 | DO j = nys_mg(l) + 2 - colour, nyn_mg(l), 2 |
---|
| 675 | DO k = nzb+1, nzt_mg(l), 2 |
---|
[114] | 676 | ! p_mg(k,j,i) = 1.0 / f1_mg(k,l) * ( & |
---|
| 677 | ! ddx2_mg(l) * ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
---|
| 678 | ! + ddy2_mg(l) * ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
---|
| 679 | ! + f2_mg(k,l) * p_mg(k+1,j,i) & |
---|
| 680 | ! + f3_mg(k,l) * p_mg(k-1,j,i) - f_mg(k,j,i) & |
---|
| 681 | ! ) |
---|
| 682 | |
---|
[1] | 683 | p_mg(k,j,i) = 1.0 / f1_mg(k,l) * ( & |
---|
[114] | 684 | ddx2_mg(l) * & |
---|
| 685 | ( p_mg(k,j,i+1) + IBITS( flags(k,j,i), 5, 1 ) * & |
---|
| 686 | ( p_mg(k,j,i) - p_mg(k,j,i+1) ) + & |
---|
| 687 | p_mg(k,j,i-1) + IBITS( flags(k,j,i), 4, 1 ) * & |
---|
| 688 | ( p_mg(k,j,i) - p_mg(k,j,i-1) ) ) & |
---|
| 689 | + ddy2_mg(l) * & |
---|
| 690 | ( p_mg(k,j+1,i) + IBITS( flags(k,j,i), 3, 1 ) * & |
---|
| 691 | ( p_mg(k,j,i) - p_mg(k,j+1,i) ) + & |
---|
| 692 | p_mg(k,j-1,i) + IBITS( flags(k,j,i), 2, 1 ) * & |
---|
| 693 | ( p_mg(k,j,i) - p_mg(k,j-1,i) ) ) & |
---|
| 694 | + f2_mg(k,l) * p_mg(k+1,j,i) & |
---|
| 695 | + f3_mg(k,l) * & |
---|
| 696 | ( p_mg(k-1,j,i) + IBITS( flags(k,j,i), 0, 1 ) * & |
---|
| 697 | ( p_mg(k,j,i) - p_mg(k-1,j,i) ) ) & |
---|
| 698 | - f_mg(k,j,i) ) |
---|
[1] | 699 | ENDDO |
---|
| 700 | ENDDO |
---|
| 701 | ENDDO |
---|
| 702 | |
---|
| 703 | DO i = nxl_mg(l)+1, nxr_mg(l), 2 |
---|
| 704 | DO j = nys_mg(l) + (colour-1), nyn_mg(l), 2 |
---|
| 705 | DO k = nzb+1, nzt_mg(l), 2 |
---|
| 706 | p_mg(k,j,i) = 1.0 / f1_mg(k,l) * ( & |
---|
[114] | 707 | ddx2_mg(l) * & |
---|
| 708 | ( p_mg(k,j,i+1) + IBITS( flags(k,j,i), 5, 1 ) * & |
---|
| 709 | ( p_mg(k,j,i) - p_mg(k,j,i+1) ) + & |
---|
| 710 | p_mg(k,j,i-1) + IBITS( flags(k,j,i), 4, 1 ) * & |
---|
| 711 | ( p_mg(k,j,i) - p_mg(k,j,i-1) ) ) & |
---|
| 712 | + ddy2_mg(l) * & |
---|
| 713 | ( p_mg(k,j+1,i) + IBITS( flags(k,j,i), 3, 1 ) * & |
---|
| 714 | ( p_mg(k,j,i) - p_mg(k,j+1,i) ) + & |
---|
| 715 | p_mg(k,j-1,i) + IBITS( flags(k,j,i), 2, 1 ) * & |
---|
| 716 | ( p_mg(k,j,i) - p_mg(k,j-1,i) ) ) & |
---|
| 717 | + f2_mg(k,l) * p_mg(k+1,j,i) & |
---|
| 718 | + f3_mg(k,l) * & |
---|
| 719 | ( p_mg(k-1,j,i) + IBITS( flags(k,j,i), 0, 1 ) * & |
---|
| 720 | ( p_mg(k,j,i) - p_mg(k-1,j,i) ) ) & |
---|
| 721 | - f_mg(k,j,i) ) |
---|
[1] | 722 | ENDDO |
---|
| 723 | ENDDO |
---|
| 724 | ENDDO |
---|
| 725 | |
---|
| 726 | DO i = nxl_mg(l), nxr_mg(l), 2 |
---|
| 727 | DO j = nys_mg(l) + (colour-1), nyn_mg(l), 2 |
---|
| 728 | DO k = nzb+2, nzt_mg(l), 2 |
---|
| 729 | p_mg(k,j,i) = 1.0 / f1_mg(k,l) * ( & |
---|
[114] | 730 | ddx2_mg(l) * & |
---|
| 731 | ( p_mg(k,j,i+1) + IBITS( flags(k,j,i), 5, 1 ) * & |
---|
| 732 | ( p_mg(k,j,i) - p_mg(k,j,i+1) ) + & |
---|
| 733 | p_mg(k,j,i-1) + IBITS( flags(k,j,i), 4, 1 ) * & |
---|
| 734 | ( p_mg(k,j,i) - p_mg(k,j,i-1) ) ) & |
---|
| 735 | + ddy2_mg(l) * & |
---|
| 736 | ( p_mg(k,j+1,i) + IBITS( flags(k,j,i), 3, 1 ) * & |
---|
| 737 | ( p_mg(k,j,i) - p_mg(k,j+1,i) ) + & |
---|
| 738 | p_mg(k,j-1,i) + IBITS( flags(k,j,i), 2, 1 ) * & |
---|
| 739 | ( p_mg(k,j,i) - p_mg(k,j-1,i) ) ) & |
---|
| 740 | + f2_mg(k,l) * p_mg(k+1,j,i) & |
---|
| 741 | + f3_mg(k,l) * & |
---|
| 742 | ( p_mg(k-1,j,i) + IBITS( flags(k,j,i), 0, 1 ) * & |
---|
| 743 | ( p_mg(k,j,i) - p_mg(k-1,j,i) ) ) & |
---|
| 744 | - f_mg(k,j,i) ) |
---|
[1] | 745 | ENDDO |
---|
| 746 | ENDDO |
---|
| 747 | ENDDO |
---|
| 748 | |
---|
| 749 | DO i = nxl_mg(l)+1, nxr_mg(l), 2 |
---|
| 750 | DO j = nys_mg(l) + 2 - colour, nyn_mg(l), 2 |
---|
| 751 | DO k = nzb+2, nzt_mg(l), 2 |
---|
| 752 | p_mg(k,j,i) = 1.0 / f1_mg(k,l) * ( & |
---|
[114] | 753 | ddx2_mg(l) * & |
---|
| 754 | ( p_mg(k,j,i+1) + IBITS( flags(k,j,i), 5, 1 ) * & |
---|
| 755 | ( p_mg(k,j,i) - p_mg(k,j,i+1) ) + & |
---|
| 756 | p_mg(k,j,i-1) + IBITS( flags(k,j,i), 4, 1 ) * & |
---|
| 757 | ( p_mg(k,j,i) - p_mg(k,j,i-1) ) ) & |
---|
| 758 | + ddy2_mg(l) * & |
---|
| 759 | ( p_mg(k,j+1,i) + IBITS( flags(k,j,i), 3, 1 ) * & |
---|
| 760 | ( p_mg(k,j,i) - p_mg(k,j+1,i) ) + & |
---|
| 761 | p_mg(k,j-1,i) + IBITS( flags(k,j,i), 2, 1 ) * & |
---|
| 762 | ( p_mg(k,j,i) - p_mg(k,j-1,i) ) ) & |
---|
| 763 | + f2_mg(k,l) * p_mg(k+1,j,i) & |
---|
| 764 | + f3_mg(k,l) * & |
---|
| 765 | ( p_mg(k-1,j,i) + IBITS( flags(k,j,i), 0, 1 ) * & |
---|
| 766 | ( p_mg(k,j,i) - p_mg(k-1,j,i) ) ) & |
---|
| 767 | - f_mg(k,j,i) ) |
---|
[1] | 768 | ENDDO |
---|
| 769 | ENDDO |
---|
| 770 | ENDDO |
---|
| 771 | CALL cpu_log( log_point_s(36), 'redblack_no_unroll', 'stop' ) |
---|
| 772 | |
---|
| 773 | ELSE |
---|
| 774 | |
---|
| 775 | ! |
---|
| 776 | !-- Loop unrolling along y, only one i loop for better cache use |
---|
| 777 | CALL cpu_log( log_point_s(38), 'redblack_unroll', 'start' ) |
---|
| 778 | DO ic = nxl_mg(l), nxr_mg(l), 2 |
---|
| 779 | DO jc = nys_mg(l), nyn_mg(l), 4 |
---|
| 780 | i = ic |
---|
| 781 | jj = jc+2-colour |
---|
| 782 | DO k = nzb+1, nzt_mg(l), 2 |
---|
| 783 | j = jj |
---|
| 784 | p_mg(k,j,i) = 1.0 / f1_mg(k,l) * ( & |
---|
[114] | 785 | ddx2_mg(l) * & |
---|
| 786 | ( p_mg(k,j,i+1) + IBITS( flags(k,j,i), 5, 1 ) * & |
---|
| 787 | ( p_mg(k,j,i) - p_mg(k,j,i+1) ) + & |
---|
| 788 | p_mg(k,j,i-1) + IBITS( flags(k,j,i), 4, 1 ) * & |
---|
| 789 | ( p_mg(k,j,i) - p_mg(k,j,i-1) ) ) & |
---|
| 790 | + ddy2_mg(l) * & |
---|
| 791 | ( p_mg(k,j+1,i) + IBITS( flags(k,j,i), 3, 1 ) * & |
---|
| 792 | ( p_mg(k,j,i) - p_mg(k,j+1,i) ) + & |
---|
| 793 | p_mg(k,j-1,i) + IBITS( flags(k,j,i), 2, 1 ) * & |
---|
| 794 | ( p_mg(k,j,i) - p_mg(k,j-1,i) ) ) & |
---|
| 795 | + f2_mg(k,l) * p_mg(k+1,j,i) & |
---|
| 796 | + f3_mg(k,l) * & |
---|
| 797 | ( p_mg(k-1,j,i) + IBITS( flags(k,j,i), 0, 1 ) * & |
---|
| 798 | ( p_mg(k,j,i) - p_mg(k-1,j,i) ) ) & |
---|
| 799 | - f_mg(k,j,i) ) |
---|
[1] | 800 | j = jj+2 |
---|
| 801 | p_mg(k,j,i) = 1.0 / f1_mg(k,l) * ( & |
---|
[114] | 802 | ddx2_mg(l) * & |
---|
| 803 | ( p_mg(k,j,i+1) + IBITS( flags(k,j,i), 5, 1 ) * & |
---|
| 804 | ( p_mg(k,j,i) - p_mg(k,j,i+1) ) + & |
---|
| 805 | p_mg(k,j,i-1) + IBITS( flags(k,j,i), 4, 1 ) * & |
---|
| 806 | ( p_mg(k,j,i) - p_mg(k,j,i-1) ) ) & |
---|
| 807 | + ddy2_mg(l) * & |
---|
| 808 | ( p_mg(k,j+1,i) + IBITS( flags(k,j,i), 3, 1 ) * & |
---|
| 809 | ( p_mg(k,j,i) - p_mg(k,j+1,i) ) + & |
---|
| 810 | p_mg(k,j-1,i) + IBITS( flags(k,j,i), 2, 1 ) * & |
---|
| 811 | ( p_mg(k,j,i) - p_mg(k,j-1,i) ) ) & |
---|
| 812 | + f2_mg(k,l) * p_mg(k+1,j,i) & |
---|
| 813 | + f3_mg(k,l) * & |
---|
| 814 | ( p_mg(k-1,j,i) + IBITS( flags(k,j,i), 0, 1 ) * & |
---|
| 815 | ( p_mg(k,j,i) - p_mg(k-1,j,i) ) ) & |
---|
| 816 | - f_mg(k,j,i) ) |
---|
[1] | 817 | ENDDO |
---|
| 818 | |
---|
| 819 | i = ic+1 |
---|
| 820 | jj = jc+colour-1 |
---|
| 821 | DO k = nzb+1, nzt_mg(l), 2 |
---|
| 822 | j =jj |
---|
| 823 | p_mg(k,j,i) = 1.0 / f1_mg(k,l) * ( & |
---|
[114] | 824 | ddx2_mg(l) * & |
---|
| 825 | ( p_mg(k,j,i+1) + IBITS( flags(k,j,i), 5, 1 ) * & |
---|
| 826 | ( p_mg(k,j,i) - p_mg(k,j,i+1) ) + & |
---|
| 827 | p_mg(k,j,i-1) + IBITS( flags(k,j,i), 4, 1 ) * & |
---|
| 828 | ( p_mg(k,j,i) - p_mg(k,j,i-1) ) ) & |
---|
| 829 | + ddy2_mg(l) * & |
---|
| 830 | ( p_mg(k,j+1,i) + IBITS( flags(k,j,i), 3, 1 ) * & |
---|
| 831 | ( p_mg(k,j,i) - p_mg(k,j+1,i) ) + & |
---|
| 832 | p_mg(k,j-1,i) + IBITS( flags(k,j,i), 2, 1 ) * & |
---|
| 833 | ( p_mg(k,j,i) - p_mg(k,j-1,i) ) ) & |
---|
| 834 | + f2_mg(k,l) * p_mg(k+1,j,i) & |
---|
| 835 | + f3_mg(k,l) * & |
---|
| 836 | ( p_mg(k-1,j,i) + IBITS( flags(k,j,i), 0, 1 ) * & |
---|
| 837 | ( p_mg(k,j,i) - p_mg(k-1,j,i) ) ) & |
---|
| 838 | - f_mg(k,j,i) ) |
---|
[1] | 839 | j = jj+2 |
---|
| 840 | p_mg(k,j,i) = 1.0 / f1_mg(k,l) * ( & |
---|
[114] | 841 | ddx2_mg(l) * & |
---|
| 842 | ( p_mg(k,j,i+1) + IBITS( flags(k,j,i), 5, 1 ) * & |
---|
| 843 | ( p_mg(k,j,i) - p_mg(k,j,i+1) ) + & |
---|
| 844 | p_mg(k,j,i-1) + IBITS( flags(k,j,i), 4, 1 ) * & |
---|
| 845 | ( p_mg(k,j,i) - p_mg(k,j,i-1) ) ) & |
---|
| 846 | + ddy2_mg(l) * & |
---|
| 847 | ( p_mg(k,j+1,i) + IBITS( flags(k,j,i), 3, 1 ) * & |
---|
| 848 | ( p_mg(k,j,i) - p_mg(k,j+1,i) ) + & |
---|
| 849 | p_mg(k,j-1,i) + IBITS( flags(k,j,i), 2, 1 ) * & |
---|
| 850 | ( p_mg(k,j,i) - p_mg(k,j-1,i) ) ) & |
---|
| 851 | + f2_mg(k,l) * p_mg(k+1,j,i) & |
---|
| 852 | + f3_mg(k,l) * & |
---|
| 853 | ( p_mg(k-1,j,i) + IBITS( flags(k,j,i), 0, 1 ) * & |
---|
| 854 | ( p_mg(k,j,i) - p_mg(k-1,j,i) ) ) & |
---|
| 855 | - f_mg(k,j,i) ) |
---|
[1] | 856 | ENDDO |
---|
| 857 | |
---|
| 858 | i = ic |
---|
| 859 | jj = jc+colour-1 |
---|
| 860 | DO k = nzb+2, nzt_mg(l), 2 |
---|
| 861 | j =jj |
---|
| 862 | p_mg(k,j,i) = 1.0 / f1_mg(k,l) * ( & |
---|
[114] | 863 | ddx2_mg(l) * & |
---|
| 864 | ( p_mg(k,j,i+1) + IBITS( flags(k,j,i), 5, 1 ) * & |
---|
| 865 | ( p_mg(k,j,i) - p_mg(k,j,i+1) ) + & |
---|
| 866 | p_mg(k,j,i-1) + IBITS( flags(k,j,i), 4, 1 ) * & |
---|
| 867 | ( p_mg(k,j,i) - p_mg(k,j,i-1) ) ) & |
---|
| 868 | + ddy2_mg(l) * & |
---|
| 869 | ( p_mg(k,j+1,i) + IBITS( flags(k,j,i), 3, 1 ) * & |
---|
| 870 | ( p_mg(k,j,i) - p_mg(k,j+1,i) ) + & |
---|
| 871 | p_mg(k,j-1,i) + IBITS( flags(k,j,i), 2, 1 ) * & |
---|
| 872 | ( p_mg(k,j,i) - p_mg(k,j-1,i) ) ) & |
---|
| 873 | + f2_mg(k,l) * p_mg(k+1,j,i) & |
---|
| 874 | + f3_mg(k,l) * & |
---|
| 875 | ( p_mg(k-1,j,i) + IBITS( flags(k,j,i), 0, 1 ) * & |
---|
| 876 | ( p_mg(k,j,i) - p_mg(k-1,j,i) ) ) & |
---|
| 877 | - f_mg(k,j,i) ) |
---|
[1] | 878 | j = jj+2 |
---|
| 879 | p_mg(k,j,i) = 1.0 / f1_mg(k,l) * ( & |
---|
[114] | 880 | ddx2_mg(l) * & |
---|
| 881 | ( p_mg(k,j,i+1) + IBITS( flags(k,j,i), 5, 1 ) * & |
---|
| 882 | ( p_mg(k,j,i) - p_mg(k,j,i+1) ) + & |
---|
| 883 | p_mg(k,j,i-1) + IBITS( flags(k,j,i), 4, 1 ) * & |
---|
| 884 | ( p_mg(k,j,i) - p_mg(k,j,i-1) ) ) & |
---|
| 885 | + ddy2_mg(l) * & |
---|
| 886 | ( p_mg(k,j+1,i) + IBITS( flags(k,j,i), 3, 1 ) * & |
---|
| 887 | ( p_mg(k,j,i) - p_mg(k,j+1,i) ) + & |
---|
| 888 | p_mg(k,j-1,i) + IBITS( flags(k,j,i), 2, 1 ) * & |
---|
| 889 | ( p_mg(k,j,i) - p_mg(k,j-1,i) ) ) & |
---|
| 890 | + f2_mg(k,l) * p_mg(k+1,j,i) & |
---|
| 891 | + f3_mg(k,l) * & |
---|
| 892 | ( p_mg(k-1,j,i) + IBITS( flags(k,j,i), 0, 1 ) * & |
---|
| 893 | ( p_mg(k,j,i) - p_mg(k-1,j,i) ) ) & |
---|
| 894 | - f_mg(k,j,i) ) |
---|
[1] | 895 | ENDDO |
---|
| 896 | |
---|
| 897 | i = ic+1 |
---|
| 898 | jj = jc+2-colour |
---|
| 899 | DO k = nzb+2, nzt_mg(l), 2 |
---|
| 900 | j =jj |
---|
| 901 | p_mg(k,j,i) = 1.0 / f1_mg(k,l) * ( & |
---|
[114] | 902 | ddx2_mg(l) * & |
---|
| 903 | ( p_mg(k,j,i+1) + IBITS( flags(k,j,i), 5, 1 ) * & |
---|
| 904 | ( p_mg(k,j,i) - p_mg(k,j,i+1) ) + & |
---|
| 905 | p_mg(k,j,i-1) + IBITS( flags(k,j,i), 4, 1 ) * & |
---|
| 906 | ( p_mg(k,j,i) - p_mg(k,j,i-1) ) ) & |
---|
| 907 | + ddy2_mg(l) * & |
---|
| 908 | ( p_mg(k,j+1,i) + IBITS( flags(k,j,i), 3, 1 ) * & |
---|
| 909 | ( p_mg(k,j,i) - p_mg(k,j+1,i) ) + & |
---|
| 910 | p_mg(k,j-1,i) + IBITS( flags(k,j,i), 2, 1 ) * & |
---|
| 911 | ( p_mg(k,j,i) - p_mg(k,j-1,i) ) ) & |
---|
| 912 | + f2_mg(k,l) * p_mg(k+1,j,i) & |
---|
| 913 | + f3_mg(k,l) * & |
---|
| 914 | ( p_mg(k-1,j,i) + IBITS( flags(k,j,i), 0, 1 ) * & |
---|
| 915 | ( p_mg(k,j,i) - p_mg(k-1,j,i) ) ) & |
---|
| 916 | - f_mg(k,j,i) ) |
---|
[1] | 917 | j = jj+2 |
---|
| 918 | p_mg(k,j,i) = 1.0 / f1_mg(k,l) * ( & |
---|
[114] | 919 | ddx2_mg(l) * & |
---|
| 920 | ( p_mg(k,j,i+1) + IBITS( flags(k,j,i), 5, 1 ) * & |
---|
| 921 | ( p_mg(k,j,i) - p_mg(k,j,i+1) ) + & |
---|
| 922 | p_mg(k,j,i-1) + IBITS( flags(k,j,i), 4, 1 ) * & |
---|
| 923 | ( p_mg(k,j,i) - p_mg(k,j,i-1) ) ) & |
---|
| 924 | + ddy2_mg(l) * & |
---|
| 925 | ( p_mg(k,j+1,i) + IBITS( flags(k,j,i), 3, 1 ) * & |
---|
| 926 | ( p_mg(k,j,i) - p_mg(k,j+1,i) ) + & |
---|
| 927 | p_mg(k,j-1,i) + IBITS( flags(k,j,i), 2, 1 ) * & |
---|
| 928 | ( p_mg(k,j,i) - p_mg(k,j-1,i) ) ) & |
---|
| 929 | + f2_mg(k,l) * p_mg(k+1,j,i) & |
---|
| 930 | + f3_mg(k,l) * & |
---|
| 931 | ( p_mg(k-1,j,i) + IBITS( flags(k,j,i), 0, 1 ) * & |
---|
| 932 | ( p_mg(k,j,i) - p_mg(k-1,j,i) ) ) & |
---|
| 933 | - f_mg(k,j,i) ) |
---|
[1] | 934 | ENDDO |
---|
| 935 | |
---|
| 936 | ENDDO |
---|
| 937 | ENDDO |
---|
| 938 | CALL cpu_log( log_point_s(38), 'redblack_unroll', 'stop' ) |
---|
| 939 | |
---|
| 940 | ENDIF |
---|
| 941 | |
---|
| 942 | ! |
---|
| 943 | !-- Horizontal boundary conditions |
---|
[667] | 944 | CALL exchange_horiz( p_mg, 1 ) |
---|
[1] | 945 | |
---|
[707] | 946 | IF ( .NOT. bc_lr_cyc ) THEN |
---|
[1] | 947 | IF ( inflow_l .OR. outflow_l ) THEN |
---|
| 948 | p_mg(:,:,nxl_mg(l)-1) = p_mg(:,:,nxl_mg(l)) |
---|
| 949 | ENDIF |
---|
| 950 | IF ( inflow_r .OR. outflow_r ) THEN |
---|
| 951 | p_mg(:,:,nxr_mg(l)+1) = p_mg(:,:,nxr_mg(l)) |
---|
| 952 | ENDIF |
---|
| 953 | ENDIF |
---|
| 954 | |
---|
[707] | 955 | IF ( .NOT. bc_ns_cyc ) THEN |
---|
[1] | 956 | IF ( inflow_n .OR. outflow_n ) THEN |
---|
| 957 | p_mg(:,nyn_mg(l)+1,:) = p_mg(:,nyn_mg(l),:) |
---|
| 958 | ENDIF |
---|
| 959 | IF ( inflow_s .OR. outflow_s ) THEN |
---|
| 960 | p_mg(:,nys_mg(l)-1,:) = p_mg(:,nys_mg(l),:) |
---|
| 961 | ENDIF |
---|
| 962 | ENDIF |
---|
| 963 | |
---|
| 964 | ! |
---|
| 965 | !-- Bottom and top boundary conditions |
---|
| 966 | IF ( ibc_p_b == 1 ) THEN |
---|
| 967 | p_mg(nzb,:,: ) = p_mg(nzb+1,:,:) |
---|
| 968 | ELSE |
---|
| 969 | p_mg(nzb,:,: ) = 0.0 |
---|
| 970 | ENDIF |
---|
| 971 | |
---|
| 972 | IF ( ibc_p_t == 1 ) THEN |
---|
| 973 | p_mg(nzt_mg(l)+1,:,: ) = p_mg(nzt_mg(l),:,:) |
---|
| 974 | ELSE |
---|
| 975 | p_mg(nzt_mg(l)+1,:,: ) = 0.0 |
---|
| 976 | ENDIF |
---|
| 977 | |
---|
| 978 | ENDDO |
---|
| 979 | |
---|
| 980 | ENDDO |
---|
| 981 | |
---|
[114] | 982 | ! |
---|
| 983 | !-- Set pressure within topography and at the topography surfaces |
---|
| 984 | !$OMP PARALLEL PRIVATE (i,j,k,wall_left,wall_north,wall_right,wall_south,wall_top,wall_total) |
---|
| 985 | !$OMP DO |
---|
| 986 | DO i = nxl_mg(l), nxr_mg(l) |
---|
| 987 | DO j = nys_mg(l), nyn_mg(l) |
---|
| 988 | DO k = nzb, nzt_mg(l) |
---|
| 989 | ! |
---|
| 990 | !-- First, set pressure inside topography to zero |
---|
| 991 | p_mg(k,j,i) = p_mg(k,j,i) * ( 1.0 - IBITS( flags(k,j,i), 6, 1 ) ) |
---|
| 992 | ! |
---|
| 993 | !-- Second, determine if the gridpoint inside topography is adjacent |
---|
| 994 | !-- to a wall and set its value to a value given by the average of |
---|
| 995 | !-- those values obtained from Neumann boundary condition |
---|
| 996 | wall_left = IBITS( flags(k,j,i-1), 5, 1 ) |
---|
| 997 | wall_right = IBITS( flags(k,j,i+1), 4, 1 ) |
---|
| 998 | wall_south = IBITS( flags(k,j-1,i), 3, 1 ) |
---|
| 999 | wall_north = IBITS( flags(k,j+1,i), 2, 1 ) |
---|
| 1000 | wall_top = IBITS( flags(k+1,j,i), 0, 1 ) |
---|
| 1001 | wall_total = wall_left + wall_right + wall_south + wall_north + & |
---|
| 1002 | wall_top |
---|
[1] | 1003 | |
---|
[114] | 1004 | IF ( wall_total > 0.0 ) THEN |
---|
| 1005 | p_mg(k,j,i) = 1.0 / wall_total * & |
---|
| 1006 | ( wall_left * p_mg(k,j,i-1) + & |
---|
| 1007 | wall_right * p_mg(k,j,i+1) + & |
---|
| 1008 | wall_south * p_mg(k,j-1,i) + & |
---|
| 1009 | wall_north * p_mg(k,j+1,i) + & |
---|
| 1010 | wall_top * p_mg(k+1,j,i) ) |
---|
| 1011 | ENDIF |
---|
| 1012 | ENDDO |
---|
| 1013 | ENDDO |
---|
| 1014 | ENDDO |
---|
[1056] | 1015 | !$OMP END PARALLEL |
---|
[114] | 1016 | |
---|
| 1017 | ! |
---|
| 1018 | !-- One more time horizontal boundary conditions |
---|
[667] | 1019 | CALL exchange_horiz( p_mg, 1) |
---|
[114] | 1020 | |
---|
[778] | 1021 | |
---|
[1] | 1022 | END SUBROUTINE redblack |
---|
| 1023 | |
---|
| 1024 | |
---|
| 1025 | |
---|
| 1026 | SUBROUTINE mg_gather( f2, f2_sub ) |
---|
| 1027 | |
---|
| 1028 | USE control_parameters |
---|
| 1029 | USE cpulog |
---|
| 1030 | USE indices |
---|
| 1031 | USE interfaces |
---|
| 1032 | USE pegrid |
---|
| 1033 | |
---|
| 1034 | IMPLICIT NONE |
---|
| 1035 | |
---|
[1092] | 1036 | INTEGER :: i, il, ir, j, jn, js, k, nwords |
---|
[1] | 1037 | |
---|
| 1038 | REAL, DIMENSION(nzb:nzt_mg(grid_level)+1, & |
---|
| 1039 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
---|
[1056] | 1040 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: f2, f2_l |
---|
[1] | 1041 | |
---|
| 1042 | REAL, DIMENSION(nzb:mg_loc_ind(5,myid)+1, & |
---|
| 1043 | mg_loc_ind(3,myid)-1:mg_loc_ind(4,myid)+1, & |
---|
| 1044 | mg_loc_ind(1,myid)-1:mg_loc_ind(2,myid)+1) :: f2_sub |
---|
| 1045 | |
---|
| 1046 | |
---|
| 1047 | #if defined( __parallel ) |
---|
| 1048 | CALL cpu_log( log_point_s(34), 'mg_gather', 'start' ) |
---|
| 1049 | |
---|
[707] | 1050 | f2_l = 0.0 |
---|
[1] | 1051 | |
---|
| 1052 | ! |
---|
[707] | 1053 | !-- Store the local subdomain array on the total array |
---|
| 1054 | js = mg_loc_ind(3,myid) |
---|
| 1055 | IF ( south_border_pe ) js = js - 1 |
---|
| 1056 | jn = mg_loc_ind(4,myid) |
---|
| 1057 | IF ( north_border_pe ) jn = jn + 1 |
---|
| 1058 | il = mg_loc_ind(1,myid) |
---|
| 1059 | IF ( left_border_pe ) il = il - 1 |
---|
| 1060 | ir = mg_loc_ind(2,myid) |
---|
| 1061 | IF ( right_border_pe ) ir = ir + 1 |
---|
| 1062 | DO i = il, ir |
---|
| 1063 | DO j = js, jn |
---|
| 1064 | DO k = nzb, nzt_mg(grid_level)+1 |
---|
| 1065 | f2_l(k,j,i) = f2_sub(k,j,i) |
---|
| 1066 | ENDDO |
---|
[1] | 1067 | ENDDO |
---|
[707] | 1068 | ENDDO |
---|
[1] | 1069 | |
---|
| 1070 | ! |
---|
[707] | 1071 | !-- Find out the number of array elements of the total array |
---|
| 1072 | nwords = SIZE( f2 ) |
---|
[1] | 1073 | |
---|
[707] | 1074 | ! |
---|
| 1075 | !-- Gather subdomain data from all PEs |
---|
| 1076 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
---|
| 1077 | CALL MPI_ALLREDUCE( f2_l(nzb,nys_mg(grid_level)-1,nxl_mg(grid_level)-1), & |
---|
| 1078 | f2(nzb,nys_mg(grid_level)-1,nxl_mg(grid_level)-1), & |
---|
| 1079 | nwords, MPI_REAL, MPI_SUM, comm2d, ierr ) |
---|
| 1080 | |
---|
[1] | 1081 | CALL cpu_log( log_point_s(34), 'mg_gather', 'stop' ) |
---|
| 1082 | #endif |
---|
| 1083 | |
---|
| 1084 | END SUBROUTINE mg_gather |
---|
| 1085 | |
---|
| 1086 | |
---|
| 1087 | |
---|
| 1088 | SUBROUTINE mg_scatter( p2, p2_sub ) |
---|
| 1089 | ! |
---|
| 1090 | !-- TODO: It may be possible to improve the speed of this routine by using |
---|
| 1091 | !-- non-blocking communication |
---|
| 1092 | |
---|
| 1093 | USE control_parameters |
---|
| 1094 | USE cpulog |
---|
| 1095 | USE indices |
---|
| 1096 | USE interfaces |
---|
| 1097 | USE pegrid |
---|
| 1098 | |
---|
| 1099 | IMPLICIT NONE |
---|
| 1100 | |
---|
[1092] | 1101 | INTEGER :: nwords |
---|
[1] | 1102 | |
---|
| 1103 | REAL, DIMENSION(nzb:nzt_mg(grid_level-1)+1, & |
---|
| 1104 | nys_mg(grid_level-1)-1:nyn_mg(grid_level-1)+1, & |
---|
| 1105 | nxl_mg(grid_level-1)-1:nxr_mg(grid_level-1)+1) :: p2 |
---|
| 1106 | |
---|
| 1107 | REAL, DIMENSION(nzb:mg_loc_ind(5,myid)+1, & |
---|
| 1108 | mg_loc_ind(3,myid)-1:mg_loc_ind(4,myid)+1, & |
---|
| 1109 | mg_loc_ind(1,myid)-1:mg_loc_ind(2,myid)+1) :: p2_sub |
---|
| 1110 | |
---|
| 1111 | ! |
---|
| 1112 | !-- Find out the number of array elements of the subdomain array |
---|
| 1113 | nwords = SIZE( p2_sub ) |
---|
| 1114 | |
---|
| 1115 | #if defined( __parallel ) |
---|
| 1116 | CALL cpu_log( log_point_s(35), 'mg_scatter', 'start' ) |
---|
| 1117 | |
---|
[707] | 1118 | p2_sub = p2(:,mg_loc_ind(3,myid)-1:mg_loc_ind(4,myid)+1, & |
---|
| 1119 | mg_loc_ind(1,myid)-1:mg_loc_ind(2,myid)+1) |
---|
[1] | 1120 | |
---|
| 1121 | CALL cpu_log( log_point_s(35), 'mg_scatter', 'stop' ) |
---|
| 1122 | #endif |
---|
| 1123 | |
---|
| 1124 | END SUBROUTINE mg_scatter |
---|
| 1125 | |
---|
| 1126 | |
---|
| 1127 | |
---|
| 1128 | RECURSIVE SUBROUTINE next_mg_level( f_mg, p_mg, p3, r ) |
---|
| 1129 | |
---|
| 1130 | !------------------------------------------------------------------------------! |
---|
| 1131 | ! Description: |
---|
| 1132 | ! ------------ |
---|
| 1133 | ! This is where the multigrid technique takes place. V- and W- Cycle are |
---|
| 1134 | ! implemented and steered by the parameter "gamma". Parameter "nue" determines |
---|
| 1135 | ! the convergence of the multigrid iterative solution. There are nue times |
---|
| 1136 | ! RB-GS iterations. It should be set to "1" or "2", considering the time effort |
---|
| 1137 | ! one would like to invest. Last choice shows a very good converging factor, |
---|
| 1138 | ! but leads to an increase in computing time. |
---|
| 1139 | !------------------------------------------------------------------------------! |
---|
| 1140 | |
---|
| 1141 | USE arrays_3d |
---|
| 1142 | USE control_parameters |
---|
| 1143 | USE grid_variables |
---|
| 1144 | USE indices |
---|
| 1145 | USE pegrid |
---|
| 1146 | |
---|
| 1147 | IMPLICIT NONE |
---|
| 1148 | |
---|
| 1149 | INTEGER :: i, j, k, nxl_mg_save, nxr_mg_save, nyn_mg_save, nys_mg_save, & |
---|
| 1150 | nzt_mg_save |
---|
| 1151 | |
---|
| 1152 | REAL, DIMENSION(nzb:nzt_mg(grid_level)+1, & |
---|
| 1153 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
---|
| 1154 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: f_mg, p_mg, p3, r |
---|
| 1155 | |
---|
[1056] | 1156 | REAL, DIMENSION(nzb:nzt_mg(grid_level-1)+1, & |
---|
| 1157 | nys_mg(grid_level-1)-1:nyn_mg(grid_level-1)+1, & |
---|
| 1158 | nxl_mg(grid_level-1)-1:nxr_mg(grid_level-1)+1) :: f2, p2 |
---|
[1] | 1159 | |
---|
[1056] | 1160 | REAL, DIMENSION(:,:,:), ALLOCATABLE :: f2_sub, p2_sub |
---|
[778] | 1161 | |
---|
[1] | 1162 | ! |
---|
| 1163 | !-- Restriction to the coarsest grid |
---|
| 1164 | 10 IF ( grid_level == 1 ) THEN |
---|
| 1165 | |
---|
| 1166 | ! |
---|
| 1167 | !-- Solution on the coarsest grid. Double the number of Gauss-Seidel |
---|
| 1168 | !-- iterations in order to get a more accurate solution. |
---|
| 1169 | ngsrb = 2 * ngsrb |
---|
[778] | 1170 | |
---|
[1] | 1171 | CALL redblack( f_mg, p_mg ) |
---|
[778] | 1172 | |
---|
[1] | 1173 | ngsrb = ngsrb / 2 |
---|
| 1174 | |
---|
[778] | 1175 | |
---|
[1] | 1176 | ELSEIF ( grid_level /= 1 ) THEN |
---|
| 1177 | |
---|
| 1178 | grid_level_count(grid_level) = grid_level_count(grid_level) + 1 |
---|
| 1179 | |
---|
| 1180 | ! |
---|
| 1181 | !-- Solution on the actual grid level |
---|
| 1182 | CALL redblack( f_mg, p_mg ) |
---|
| 1183 | |
---|
| 1184 | ! |
---|
| 1185 | !-- Determination of the actual residual |
---|
| 1186 | CALL resid( f_mg, p_mg, r ) |
---|
| 1187 | |
---|
| 1188 | ! |
---|
| 1189 | !-- Restriction of the residual (finer grid values!) to the next coarser |
---|
| 1190 | !-- grid. Therefore, the grid level has to be decremented now. nxl..nzt have |
---|
| 1191 | !-- to be set to the coarse grid values, because these variables are needed |
---|
| 1192 | !-- for the exchange of ghost points in routine exchange_horiz |
---|
| 1193 | grid_level = grid_level - 1 |
---|
| 1194 | nxl = nxl_mg(grid_level) |
---|
[778] | 1195 | nys = nys_mg(grid_level) |
---|
[1] | 1196 | nxr = nxr_mg(grid_level) |
---|
| 1197 | nyn = nyn_mg(grid_level) |
---|
| 1198 | nzt = nzt_mg(grid_level) |
---|
| 1199 | |
---|
| 1200 | IF ( grid_level == mg_switch_to_pe0_level ) THEN |
---|
[778] | 1201 | |
---|
[1] | 1202 | ! |
---|
| 1203 | !-- From this level on, calculations are done on PE0 only. |
---|
| 1204 | !-- First, carry out restriction on the subdomain. |
---|
| 1205 | !-- Therefore, indices of the level have to be changed to subdomain values |
---|
| 1206 | !-- in between (otherwise, the restrict routine would expect |
---|
| 1207 | !-- the gathered array) |
---|
[778] | 1208 | |
---|
[1] | 1209 | nxl_mg_save = nxl_mg(grid_level) |
---|
| 1210 | nxr_mg_save = nxr_mg(grid_level) |
---|
| 1211 | nys_mg_save = nys_mg(grid_level) |
---|
| 1212 | nyn_mg_save = nyn_mg(grid_level) |
---|
| 1213 | nzt_mg_save = nzt_mg(grid_level) |
---|
| 1214 | nxl_mg(grid_level) = mg_loc_ind(1,myid) |
---|
| 1215 | nxr_mg(grid_level) = mg_loc_ind(2,myid) |
---|
| 1216 | nys_mg(grid_level) = mg_loc_ind(3,myid) |
---|
| 1217 | nyn_mg(grid_level) = mg_loc_ind(4,myid) |
---|
| 1218 | nzt_mg(grid_level) = mg_loc_ind(5,myid) |
---|
| 1219 | nxl = mg_loc_ind(1,myid) |
---|
| 1220 | nxr = mg_loc_ind(2,myid) |
---|
| 1221 | nys = mg_loc_ind(3,myid) |
---|
| 1222 | nyn = mg_loc_ind(4,myid) |
---|
| 1223 | nzt = mg_loc_ind(5,myid) |
---|
| 1224 | |
---|
| 1225 | ALLOCATE( f2_sub(nzb:nzt_mg(grid_level)+1, & |
---|
| 1226 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
---|
| 1227 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) ) |
---|
| 1228 | |
---|
| 1229 | CALL restrict( f2_sub, r ) |
---|
| 1230 | |
---|
| 1231 | ! |
---|
| 1232 | !-- Restore the correct indices of this level |
---|
| 1233 | nxl_mg(grid_level) = nxl_mg_save |
---|
| 1234 | nxr_mg(grid_level) = nxr_mg_save |
---|
| 1235 | nys_mg(grid_level) = nys_mg_save |
---|
| 1236 | nyn_mg(grid_level) = nyn_mg_save |
---|
| 1237 | nzt_mg(grid_level) = nzt_mg_save |
---|
| 1238 | nxl = nxl_mg(grid_level) |
---|
| 1239 | nxr = nxr_mg(grid_level) |
---|
| 1240 | nys = nys_mg(grid_level) |
---|
| 1241 | nyn = nyn_mg(grid_level) |
---|
| 1242 | nzt = nzt_mg(grid_level) |
---|
| 1243 | ! |
---|
| 1244 | !-- Gather all arrays from the subdomains on PE0 |
---|
| 1245 | CALL mg_gather( f2, f2_sub ) |
---|
| 1246 | |
---|
| 1247 | ! |
---|
| 1248 | !-- Set switch for routine exchange_horiz, that no ghostpoint exchange |
---|
| 1249 | !-- has to be carried out from now on |
---|
| 1250 | mg_switch_to_pe0 = .TRUE. |
---|
| 1251 | |
---|
| 1252 | ! |
---|
| 1253 | !-- In case of non-cyclic lateral boundary conditions, both in- and |
---|
[707] | 1254 | !-- outflow conditions have to be used on all PEs after the switch, |
---|
| 1255 | !-- because then they have the total domain. |
---|
[1159] | 1256 | IF ( bc_lr_dirrad ) THEN |
---|
[707] | 1257 | inflow_l = .TRUE. |
---|
| 1258 | inflow_r = .FALSE. |
---|
| 1259 | outflow_l = .FALSE. |
---|
| 1260 | outflow_r = .TRUE. |
---|
[1159] | 1261 | ELSEIF ( bc_lr_raddir ) THEN |
---|
[707] | 1262 | inflow_l = .FALSE. |
---|
| 1263 | inflow_r = .TRUE. |
---|
| 1264 | outflow_l = .TRUE. |
---|
| 1265 | outflow_r = .FALSE. |
---|
[1] | 1266 | ENDIF |
---|
| 1267 | |
---|
[1159] | 1268 | IF ( bc_ns_dirrad ) THEN |
---|
[707] | 1269 | inflow_n = .TRUE. |
---|
| 1270 | inflow_s = .FALSE. |
---|
| 1271 | outflow_n = .FALSE. |
---|
| 1272 | outflow_s = .TRUE. |
---|
[1159] | 1273 | ELSEIF ( bc_ns_raddir ) THEN |
---|
[707] | 1274 | inflow_n = .FALSE. |
---|
| 1275 | inflow_s = .TRUE. |
---|
| 1276 | outflow_n = .TRUE. |
---|
| 1277 | outflow_s = .FALSE. |
---|
| 1278 | ENDIF |
---|
| 1279 | |
---|
[1] | 1280 | DEALLOCATE( f2_sub ) |
---|
| 1281 | |
---|
| 1282 | ELSE |
---|
[1056] | 1283 | |
---|
[1] | 1284 | CALL restrict( f2, r ) |
---|
| 1285 | |
---|
| 1286 | ENDIF |
---|
[707] | 1287 | |
---|
[1] | 1288 | p2 = 0.0 |
---|
| 1289 | |
---|
| 1290 | ! |
---|
| 1291 | !-- Repeat the same procedure till the coarsest grid is reached |
---|
[707] | 1292 | CALL next_mg_level( f2, p2, p3, r ) |
---|
[1] | 1293 | |
---|
| 1294 | ENDIF |
---|
| 1295 | |
---|
| 1296 | ! |
---|
| 1297 | !-- Now follows the prolongation |
---|
| 1298 | IF ( grid_level >= 2 ) THEN |
---|
| 1299 | |
---|
| 1300 | ! |
---|
| 1301 | !-- Prolongation of the new residual. The values are transferred |
---|
| 1302 | !-- from the coarse to the next finer grid. |
---|
| 1303 | IF ( grid_level == mg_switch_to_pe0_level+1 ) THEN |
---|
[879] | 1304 | |
---|
| 1305 | #if defined( __parallel ) |
---|
[1] | 1306 | ! |
---|
| 1307 | !-- At this level, the new residual first has to be scattered from |
---|
| 1308 | !-- PE0 to the other PEs |
---|
| 1309 | ALLOCATE( p2_sub(nzb:mg_loc_ind(5,myid)+1, & |
---|
| 1310 | mg_loc_ind(3,myid)-1:mg_loc_ind(4,myid)+1, & |
---|
| 1311 | mg_loc_ind(1,myid)-1:mg_loc_ind(2,myid)+1) ) |
---|
| 1312 | |
---|
| 1313 | CALL mg_scatter( p2, p2_sub ) |
---|
| 1314 | |
---|
| 1315 | ! |
---|
| 1316 | !-- Therefore, indices of the previous level have to be changed to |
---|
| 1317 | !-- subdomain values in between (otherwise, the prolong routine would |
---|
| 1318 | !-- expect the gathered array) |
---|
| 1319 | nxl_mg_save = nxl_mg(grid_level-1) |
---|
| 1320 | nxr_mg_save = nxr_mg(grid_level-1) |
---|
| 1321 | nys_mg_save = nys_mg(grid_level-1) |
---|
| 1322 | nyn_mg_save = nyn_mg(grid_level-1) |
---|
| 1323 | nzt_mg_save = nzt_mg(grid_level-1) |
---|
| 1324 | nxl_mg(grid_level-1) = mg_loc_ind(1,myid) |
---|
| 1325 | nxr_mg(grid_level-1) = mg_loc_ind(2,myid) |
---|
| 1326 | nys_mg(grid_level-1) = mg_loc_ind(3,myid) |
---|
| 1327 | nyn_mg(grid_level-1) = mg_loc_ind(4,myid) |
---|
| 1328 | nzt_mg(grid_level-1) = mg_loc_ind(5,myid) |
---|
| 1329 | |
---|
| 1330 | ! |
---|
| 1331 | !-- Set switch for routine exchange_horiz, that ghostpoint exchange |
---|
| 1332 | !-- has to be carried again out from now on |
---|
| 1333 | mg_switch_to_pe0 = .FALSE. |
---|
| 1334 | |
---|
| 1335 | ! |
---|
[707] | 1336 | !-- For non-cyclic lateral boundary conditions, restore the |
---|
| 1337 | !-- in-/outflow conditions |
---|
| 1338 | inflow_l = .FALSE.; inflow_r = .FALSE. |
---|
| 1339 | inflow_n = .FALSE.; inflow_s = .FALSE. |
---|
| 1340 | outflow_l = .FALSE.; outflow_r = .FALSE. |
---|
| 1341 | outflow_n = .FALSE.; outflow_s = .FALSE. |
---|
| 1342 | |
---|
| 1343 | IF ( pleft == MPI_PROC_NULL ) THEN |
---|
[1159] | 1344 | IF ( bc_lr_dirrad ) THEN |
---|
[707] | 1345 | inflow_l = .TRUE. |
---|
[1159] | 1346 | ELSEIF ( bc_lr_raddir ) THEN |
---|
[707] | 1347 | outflow_l = .TRUE. |
---|
[1] | 1348 | ENDIF |
---|
[707] | 1349 | ENDIF |
---|
| 1350 | |
---|
| 1351 | IF ( pright == MPI_PROC_NULL ) THEN |
---|
[1159] | 1352 | IF ( bc_lr_dirrad ) THEN |
---|
[707] | 1353 | outflow_r = .TRUE. |
---|
[1159] | 1354 | ELSEIF ( bc_lr_raddir ) THEN |
---|
[707] | 1355 | inflow_r = .TRUE. |
---|
[1] | 1356 | ENDIF |
---|
| 1357 | ENDIF |
---|
| 1358 | |
---|
[707] | 1359 | IF ( psouth == MPI_PROC_NULL ) THEN |
---|
[1159] | 1360 | IF ( bc_ns_dirrad ) THEN |
---|
[707] | 1361 | outflow_s = .TRUE. |
---|
[1159] | 1362 | ELSEIF ( bc_ns_raddir ) THEN |
---|
[707] | 1363 | inflow_s = .TRUE. |
---|
| 1364 | ENDIF |
---|
| 1365 | ENDIF |
---|
| 1366 | |
---|
| 1367 | IF ( pnorth == MPI_PROC_NULL ) THEN |
---|
[1159] | 1368 | IF ( bc_ns_dirrad ) THEN |
---|
[707] | 1369 | inflow_n = .TRUE. |
---|
[1159] | 1370 | ELSEIF ( bc_ns_raddir ) THEN |
---|
[707] | 1371 | outflow_n = .TRUE. |
---|
| 1372 | ENDIF |
---|
| 1373 | ENDIF |
---|
| 1374 | |
---|
[1] | 1375 | CALL prolong( p2_sub, p3 ) |
---|
| 1376 | |
---|
| 1377 | ! |
---|
| 1378 | !-- Restore the correct indices of the previous level |
---|
| 1379 | nxl_mg(grid_level-1) = nxl_mg_save |
---|
| 1380 | nxr_mg(grid_level-1) = nxr_mg_save |
---|
| 1381 | nys_mg(grid_level-1) = nys_mg_save |
---|
| 1382 | nyn_mg(grid_level-1) = nyn_mg_save |
---|
| 1383 | nzt_mg(grid_level-1) = nzt_mg_save |
---|
| 1384 | |
---|
| 1385 | DEALLOCATE( p2_sub ) |
---|
[879] | 1386 | #endif |
---|
[1] | 1387 | |
---|
| 1388 | ELSE |
---|
[879] | 1389 | |
---|
[1] | 1390 | CALL prolong( p2, p3 ) |
---|
| 1391 | |
---|
| 1392 | ENDIF |
---|
| 1393 | |
---|
| 1394 | ! |
---|
| 1395 | !-- Computation of the new pressure correction. Therefore, |
---|
| 1396 | !-- values from prior grids are added up automatically stage by stage. |
---|
| 1397 | DO i = nxl_mg(grid_level)-1, nxr_mg(grid_level)+1 |
---|
| 1398 | DO j = nys_mg(grid_level)-1, nyn_mg(grid_level)+1 |
---|
| 1399 | DO k = nzb, nzt_mg(grid_level)+1 |
---|
| 1400 | p_mg(k,j,i) = p_mg(k,j,i) + p3(k,j,i) |
---|
| 1401 | ENDDO |
---|
| 1402 | ENDDO |
---|
| 1403 | ENDDO |
---|
| 1404 | |
---|
| 1405 | ! |
---|
| 1406 | !-- Relaxation of the new solution |
---|
| 1407 | CALL redblack( f_mg, p_mg ) |
---|
| 1408 | |
---|
| 1409 | ENDIF |
---|
| 1410 | |
---|
[778] | 1411 | |
---|
[1] | 1412 | ! |
---|
| 1413 | !-- The following few lines serve the steering of the multigrid scheme |
---|
| 1414 | IF ( grid_level == maximum_grid_level ) THEN |
---|
| 1415 | |
---|
| 1416 | GOTO 20 |
---|
| 1417 | |
---|
| 1418 | ELSEIF ( grid_level /= maximum_grid_level .AND. grid_level /= 1 .AND. & |
---|
| 1419 | grid_level_count(grid_level) /= gamma_mg ) THEN |
---|
| 1420 | |
---|
| 1421 | GOTO 10 |
---|
| 1422 | |
---|
| 1423 | ENDIF |
---|
| 1424 | |
---|
| 1425 | ! |
---|
| 1426 | !-- Reset counter for the next call of poismg |
---|
| 1427 | grid_level_count(grid_level) = 0 |
---|
| 1428 | |
---|
| 1429 | ! |
---|
| 1430 | !-- Continue with the next finer level. nxl..nzt have to be |
---|
| 1431 | !-- set to the finer grid values, because these variables are needed for the |
---|
| 1432 | !-- exchange of ghost points in routine exchange_horiz |
---|
| 1433 | grid_level = grid_level + 1 |
---|
| 1434 | nxl = nxl_mg(grid_level) |
---|
| 1435 | nxr = nxr_mg(grid_level) |
---|
| 1436 | nys = nys_mg(grid_level) |
---|
| 1437 | nyn = nyn_mg(grid_level) |
---|
| 1438 | nzt = nzt_mg(grid_level) |
---|
| 1439 | |
---|
| 1440 | 20 CONTINUE |
---|
| 1441 | |
---|
| 1442 | END SUBROUTINE next_mg_level |
---|