[1] | 1 | SUBROUTINE sor( d, ddzu, ddzw, p ) |
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| 2 | |
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| 3 | !------------------------------------------------------------------------------! |
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[484] | 4 | ! Current revisions: |
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[1] | 5 | ! ----------------- |
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[707] | 6 | ! bc_lr/ns replaced by bc_lr/ns_cyc |
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[1] | 7 | ! |
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| 8 | ! Former revisions: |
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| 9 | ! ----------------- |
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[3] | 10 | ! $Id: sor.f90 707 2011-03-29 11:39:40Z raasch $ |
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[77] | 11 | ! |
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[668] | 12 | ! 667 2010-12-23 12:06:00Z suehring/gryschka |
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| 13 | ! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng. |
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| 14 | ! Call of exchange_horiz are modified. |
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| 15 | ! bug removed in declaration of ddzw(), nz replaced by nzt+1 |
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| 16 | ! |
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[77] | 17 | ! 75 2007-03-22 09:54:05Z raasch |
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| 18 | ! 2nd+3rd argument removed from exchange horiz |
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| 19 | ! |
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[3] | 20 | ! RCS Log replace by Id keyword, revision history cleaned up |
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| 21 | ! |
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[1] | 22 | ! Revision 1.9 2005/03/26 21:02:23 raasch |
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| 23 | ! Implementation of non-cyclic (Neumann) horizontal boundary conditions, |
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| 24 | ! dx2,dy2 replaced by ddx2,ddy2 |
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| 25 | ! |
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| 26 | ! Revision 1.1 1997/08/11 06:25:56 raasch |
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| 27 | ! Initial revision |
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| 28 | ! |
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| 29 | ! |
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| 30 | ! Description: |
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| 31 | ! ------------ |
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| 32 | ! Solve the Poisson-equation with the SOR-Red/Black-scheme. |
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[3] | 33 | !------------------------------------------------------------------------------! |
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[1] | 34 | |
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| 35 | USE grid_variables |
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| 36 | USE indices |
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| 37 | USE pegrid |
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| 38 | USE control_parameters |
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| 39 | |
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| 40 | IMPLICIT NONE |
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| 41 | |
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| 42 | INTEGER :: i, j, k, n, nxl1, nxl2, nys1, nys2 |
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[667] | 43 | REAL :: ddzu(1:nz+1), ddzw(1:nzt+1) |
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[1] | 44 | REAL :: d(nzb+1:nzt,nys:nyn,nxl:nxr), & |
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[667] | 45 | p(nzb:nzt+1,nysg:nyng,nxlg:nxrg) |
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[1] | 46 | REAL, DIMENSION(:), ALLOCATABLE :: f1, f2, f3 |
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| 47 | |
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| 48 | ALLOCATE( f1(1:nz), f2(1:nz), f3(1:nz) ) |
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| 49 | |
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| 50 | ! |
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| 51 | !-- Compute pre-factors. |
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| 52 | DO k = 1, nz |
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| 53 | f2(k) = ddzu(k+1) * ddzw(k) |
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| 54 | f3(k) = ddzu(k) * ddzw(k) |
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| 55 | f1(k) = 2.0 * ( ddx2 + ddy2 ) + f2(k) + f3(k) |
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| 56 | ENDDO |
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| 57 | |
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| 58 | ! |
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| 59 | !-- Limits for RED- and BLACK-part. |
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| 60 | IF ( MOD( nxl , 2 ) == 0 ) THEN |
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| 61 | nxl1 = nxl |
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| 62 | nxl2 = nxl + 1 |
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| 63 | ELSE |
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| 64 | nxl1 = nxl + 1 |
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| 65 | nxl2 = nxl |
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| 66 | ENDIF |
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| 67 | IF ( MOD( nys , 2 ) == 0 ) THEN |
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| 68 | nys1 = nys |
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| 69 | nys2 = nys + 1 |
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| 70 | ELSE |
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| 71 | nys1 = nys + 1 |
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| 72 | nys2 = nys |
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| 73 | ENDIF |
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| 74 | |
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| 75 | DO n = 1, n_sor |
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| 76 | |
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| 77 | ! |
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| 78 | !-- RED-part |
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| 79 | DO i = nxl1, nxr, 2 |
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| 80 | DO j = nys2, nyn, 2 |
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| 81 | DO k = nzb+1, nzt |
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| 82 | p(k,j,i) = p(k,j,i) + omega_sor / f1(k) * ( & |
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| 83 | ddx2 * ( p(k,j,i+1) + p(k,j,i-1) ) + & |
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| 84 | ddy2 * ( p(k,j+1,i) + p(k,j-1,i) ) + & |
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| 85 | f2(k) * p(k+1,j,i) + & |
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| 86 | f3(k) * p(k-1,j,i) - & |
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| 87 | d(k,j,i) - & |
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| 88 | f1(k) * p(k,j,i) ) |
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| 89 | ENDDO |
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| 90 | ENDDO |
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| 91 | ENDDO |
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| 92 | |
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| 93 | DO i = nxl2, nxr, 2 |
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| 94 | DO j = nys1, nyn, 2 |
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| 95 | DO k = nzb+1, nzt |
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| 96 | p(k,j,i) = p(k,j,i) + omega_sor / f1(k) * ( & |
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| 97 | ddx2 * ( p(k,j,i+1) + p(k,j,i-1) ) + & |
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| 98 | ddy2 * ( p(k,j+1,i) + p(k,j-1,i) ) + & |
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| 99 | f2(k) * p(k+1,j,i) + & |
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| 100 | f3(k) * p(k-1,j,i) - & |
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| 101 | d(k,j,i) - & |
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| 102 | f1(k) * p(k,j,i) ) |
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| 103 | ENDDO |
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| 104 | ENDDO |
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| 105 | ENDDO |
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| 106 | |
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| 107 | ! |
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| 108 | !-- Exchange of boundary values for p. |
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[667] | 109 | CALL exchange_horiz( p, nbgp ) |
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[1] | 110 | |
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| 111 | ! |
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| 112 | !-- Horizontal (Neumann) boundary conditions in case of non-cyclic boundaries |
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[707] | 113 | IF ( .NOT. bc_lr_cyc ) THEN |
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[1] | 114 | IF ( inflow_l .OR. outflow_l ) p(:,:,nxl-1) = p(:,:,nxl) |
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| 115 | IF ( inflow_r .OR. outflow_r ) p(:,:,nxr+1) = p(:,:,nxr) |
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| 116 | ENDIF |
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[707] | 117 | IF ( .NOT. bc_ns_cyc ) THEN |
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[1] | 118 | IF ( inflow_n .OR. outflow_n ) p(:,nyn+1,:) = p(:,nyn,:) |
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| 119 | IF ( inflow_s .OR. outflow_s ) p(:,nys-1,:) = p(:,nys,:) |
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| 120 | ENDIF |
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| 121 | |
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| 122 | ! |
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| 123 | !-- BLACK-part |
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| 124 | DO i = nxl1, nxr, 2 |
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| 125 | DO j = nys1, nyn, 2 |
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| 126 | DO k = nzb+1, nzt |
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| 127 | p(k,j,i) = p(k,j,i) + omega_sor / f1(k) * ( & |
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| 128 | ddx2 * ( p(k,j,i+1) + p(k,j,i-1) ) + & |
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| 129 | ddy2 * ( p(k,j+1,i) + p(k,j-1,i) ) + & |
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| 130 | f2(k) * p(k+1,j,i) + & |
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| 131 | f3(k) * p(k-1,j,i) - & |
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| 132 | d(k,j,i) - & |
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| 133 | f1(k) * p(k,j,i) ) |
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| 134 | ENDDO |
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| 135 | ENDDO |
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| 136 | ENDDO |
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| 137 | |
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| 138 | DO i = nxl2, nxr, 2 |
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| 139 | DO j = nys2, nyn, 2 |
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| 140 | DO k = nzb+1, nzt |
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| 141 | p(k,j,i) = p(k,j,i) + omega_sor / f1(k) * ( & |
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| 142 | ddx2 * ( p(k,j,i+1) + p(k,j,i-1) ) + & |
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| 143 | ddy2 * ( p(k,j+1,i) + p(k,j-1,i) ) + & |
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| 144 | f2(k) * p(k+1,j,i) + & |
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| 145 | f3(k) * p(k-1,j,i) - & |
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| 146 | d(k,j,i) - & |
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| 147 | f1(k) * p(k,j,i) ) |
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| 148 | ENDDO |
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| 149 | ENDDO |
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| 150 | ENDDO |
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| 151 | |
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| 152 | ! |
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| 153 | !-- Exchange of boundary values for p. |
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[667] | 154 | CALL exchange_horiz( p, nbgp ) |
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[1] | 155 | |
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| 156 | ! |
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| 157 | !-- Boundary conditions top/bottom. |
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| 158 | !-- Bottom boundary |
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[667] | 159 | IF ( ibc_p_b == 1 ) THEN ! Neumann |
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[1] | 160 | p(nzb,:,:) = p(nzb+1,:,:) |
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[667] | 161 | ELSE ! Dirichlet |
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[1] | 162 | p(nzb,:,:) = 0.0 |
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| 163 | ENDIF |
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| 164 | |
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| 165 | ! |
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| 166 | !-- Top boundary |
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[667] | 167 | IF ( ibc_p_t == 1 ) THEN ! Neumann |
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[1] | 168 | p(nzt+1,:,:) = p(nzt,:,:) |
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[667] | 169 | ELSE ! Dirichlet |
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[1] | 170 | p(nzt+1,:,:) = 0.0 |
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| 171 | ENDIF |
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| 172 | |
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| 173 | ! |
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| 174 | !-- Horizontal (Neumann) boundary conditions in case of non-cyclic boundaries |
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[707] | 175 | IF ( .NOT. bc_lr_cyc ) THEN |
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[1] | 176 | IF ( inflow_l .OR. outflow_l ) p(:,:,nxl-1) = p(:,:,nxl) |
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| 177 | IF ( inflow_r .OR. outflow_r ) p(:,:,nxr+1) = p(:,:,nxr) |
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| 178 | ENDIF |
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[707] | 179 | IF ( .NOT. bc_ns_cyc ) THEN |
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[1] | 180 | IF ( inflow_n .OR. outflow_n ) p(:,nyn+1,:) = p(:,nyn,:) |
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| 181 | IF ( inflow_s .OR. outflow_s ) p(:,nys-1,:) = p(:,nys,:) |
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| 182 | ENDIF |
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| 183 | |
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[667] | 184 | |
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[1] | 185 | ENDDO |
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| 186 | |
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| 187 | DEALLOCATE( f1, f2, f3 ) |
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| 188 | |
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| 189 | END SUBROUTINE sor |
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