| 1 | SUBROUTINE init_grid |
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| 2 | |
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| 3 | !------------------------------------------------------------------------------! |
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| 4 | ! Actual revisions: |
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| 5 | ! ----------------- |
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| 6 | ! |
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| 7 | ! |
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| 8 | ! Former revisions: |
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| 9 | ! ----------------- |
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| 10 | ! $Id: init_grid.f90 145 2008-01-09 08:17:38Z steinfeld $ |
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| 11 | ! |
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| 12 | ! 134 2007-11-21 07:28:38Z letzel |
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| 13 | ! Redefine initial nzb_local as the actual total size of topography (later the |
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| 14 | ! extent of topography in nzb_local is reduced by 1dx at the E topography walls |
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| 15 | ! and by 1dy at the N topography walls to form the basis for nzb_s_inner); |
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| 16 | ! for consistency redefine 'single_building' case. |
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| 17 | ! Calculation of wall flag arrays |
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| 18 | ! |
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| 19 | ! 94 2007-06-01 15:25:22Z raasch |
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| 20 | ! Grid definition for ocean version |
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| 21 | ! |
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| 22 | ! 75 2007-03-22 09:54:05Z raasch |
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| 23 | ! storage of topography height arrays zu_s_inner and zw_s_inner, |
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| 24 | ! 2nd+3rd argument removed from exchange horiz |
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| 25 | ! |
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| 26 | ! 19 2007-02-23 04:53:48Z raasch |
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| 27 | ! Setting of nzt_diff |
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| 28 | ! |
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| 29 | ! RCS Log replace by Id keyword, revision history cleaned up |
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| 30 | ! |
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| 31 | ! Revision 1.17 2006/08/22 14:00:05 raasch |
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| 32 | ! +dz_max to limit vertical stretching, |
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| 33 | ! bugfix in index array initialization for line- or point-like topography |
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| 34 | ! structures |
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| 35 | ! |
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| 36 | ! Revision 1.1 1997/08/11 06:17:45 raasch |
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| 37 | ! Initial revision (Testversion) |
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| 38 | ! |
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| 39 | ! |
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| 40 | ! Description: |
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| 41 | ! ------------ |
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| 42 | ! Creating grid depending constants |
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| 43 | !------------------------------------------------------------------------------! |
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| 44 | |
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| 45 | USE arrays_3d |
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| 46 | USE control_parameters |
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| 47 | USE grid_variables |
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| 48 | USE indices |
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| 49 | USE pegrid |
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| 50 | |
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| 51 | IMPLICIT NONE |
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| 52 | |
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| 53 | INTEGER :: bh, blx, bly, bxl, bxr, byn, bys, gls, i, inc, i_center, j, & |
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| 54 | j_center, k, l, nxl_l, nxr_l, nyn_l, nys_l, nzb_si, nzt_l, vi |
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| 55 | |
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| 56 | INTEGER, DIMENSION(:), ALLOCATABLE :: vertical_influence |
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| 57 | |
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| 58 | INTEGER, DIMENSION(:,:), ALLOCATABLE :: corner_nl, corner_nr, corner_sl, & |
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| 59 | corner_sr, wall_l, wall_n, wall_r,& |
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| 60 | wall_s, nzb_local, nzb_tmp |
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| 61 | |
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| 62 | REAL :: dx_l, dy_l, dz_stretched |
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| 63 | |
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| 64 | REAL, DIMENSION(0:ny,0:nx) :: topo_height |
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| 65 | |
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| 66 | REAL, DIMENSION(:,:,:), ALLOCATABLE :: distance |
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| 67 | |
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| 68 | ! |
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| 69 | !-- Allocate grid arrays |
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| 70 | ALLOCATE( ddzu(1:nzt+1), ddzw(1:nzt+1), dd2zu(1:nzt), dzu(1:nzt+1), & |
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| 71 | dzw(1:nzt+1), l_grid(1:nzt), zu(0:nzt+1), zw(0:nzt+1) ) |
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| 72 | |
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| 73 | ! |
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| 74 | !-- Compute height of u-levels from constant grid length and dz stretch factors |
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| 75 | IF ( dz == -1.0 ) THEN |
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| 76 | IF ( myid == 0 ) PRINT*,'+++ init_grid: missing dz' |
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| 77 | CALL local_stop |
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| 78 | ELSEIF ( dz <= 0.0 ) THEN |
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| 79 | IF ( myid == 0 ) PRINT*,'+++ init_grid: dz=',dz,' <= 0.0' |
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| 80 | CALL local_stop |
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| 81 | ENDIF |
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| 82 | |
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| 83 | ! |
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| 84 | !-- Define the vertical grid levels |
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| 85 | IF ( .NOT. ocean ) THEN |
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| 86 | ! |
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| 87 | !-- Grid for atmosphere with surface at z=0 (k=0, w-grid). |
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| 88 | !-- Since the w-level lies on the surface, the first u-level (staggered!) |
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| 89 | !-- lies below the surface (used for "mirror" boundary condition). |
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| 90 | !-- The first u-level above the surface corresponds to the top of the |
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| 91 | !-- Prandtl-layer. |
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| 92 | zu(0) = - dz * 0.5 |
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| 93 | zu(1) = dz * 0.5 |
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| 94 | |
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| 95 | dz_stretch_level_index = nzt+1 |
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| 96 | dz_stretched = dz |
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| 97 | DO k = 2, nzt+1 |
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| 98 | IF ( dz_stretch_level <= zu(k-1) .AND. dz_stretched < dz_max ) THEN |
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| 99 | dz_stretched = dz_stretched * dz_stretch_factor |
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| 100 | dz_stretched = MIN( dz_stretched, dz_max ) |
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| 101 | IF ( dz_stretch_level_index == nzt+1 ) dz_stretch_level_index = k-1 |
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| 102 | ENDIF |
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| 103 | zu(k) = zu(k-1) + dz_stretched |
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| 104 | ENDDO |
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| 105 | |
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| 106 | ! |
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| 107 | !-- Compute the w-levels. They are always staggered half-way between the |
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| 108 | !-- corresponding u-levels. The top w-level is extrapolated linearly. |
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| 109 | zw(0) = 0.0 |
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| 110 | DO k = 1, nzt |
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| 111 | zw(k) = ( zu(k) + zu(k+1) ) * 0.5 |
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| 112 | ENDDO |
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| 113 | zw(nzt+1) = zw(nzt) + 2.0 * ( zu(nzt+1) - zw(nzt) ) |
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| 114 | |
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| 115 | ELSE |
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| 116 | ! |
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| 117 | !-- Grid for ocean with solid surface at z=0 (k=0, w-grid). The free water |
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| 118 | !-- surface is at k=nzt (w-grid). |
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| 119 | !-- Since the w-level lies always on the surface, the first/last u-level |
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| 120 | !-- (staggered!) lies below the bottom surface / above the free surface. |
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| 121 | !-- It is used for "mirror" boundary condition. |
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| 122 | !-- The first u-level above the bottom surface corresponds to the top of the |
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| 123 | !-- Prandtl-layer. |
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| 124 | zu(nzt+1) = dz * 0.5 |
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| 125 | zu(nzt) = - dz * 0.5 |
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| 126 | |
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| 127 | dz_stretch_level_index = 0 |
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| 128 | dz_stretched = dz |
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| 129 | DO k = nzt-1, 0, -1 |
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| 130 | IF ( dz_stretch_level <= ABS( zu(k+1) ) .AND. & |
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| 131 | dz_stretched < dz_max ) THEN |
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| 132 | dz_stretched = dz_stretched * dz_stretch_factor |
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| 133 | dz_stretched = MIN( dz_stretched, dz_max ) |
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| 134 | IF ( dz_stretch_level_index == 0 ) dz_stretch_level_index = k+1 |
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| 135 | ENDIF |
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| 136 | zu(k) = zu(k+1) - dz_stretched |
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| 137 | ENDDO |
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| 138 | |
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| 139 | ! |
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| 140 | !-- Compute the w-levels. They are always staggered half-way between the |
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| 141 | !-- corresponding u-levels. |
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| 142 | !-- The top w-level (nzt+1) is not used but set for consistency, since |
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| 143 | !-- w and all scalar variables are defined up tp nzt+1. |
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| 144 | zw(nzt+1) = dz |
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| 145 | zw(nzt) = 0.0 |
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| 146 | DO k = 0, nzt |
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| 147 | zw(k) = ( zu(k) + zu(k+1) ) * 0.5 |
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| 148 | ENDDO |
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| 149 | |
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| 150 | ENDIF |
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| 151 | |
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| 152 | ! |
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| 153 | !-- Compute grid lengths. |
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| 154 | DO k = 1, nzt+1 |
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| 155 | dzu(k) = zu(k) - zu(k-1) |
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| 156 | ddzu(k) = 1.0 / dzu(k) |
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| 157 | dzw(k) = zw(k) - zw(k-1) |
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| 158 | ddzw(k) = 1.0 / dzw(k) |
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| 159 | ENDDO |
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| 160 | |
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| 161 | DO k = 1, nzt |
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| 162 | dd2zu(k) = 1.0 / ( dzu(k) + dzu(k+1) ) |
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| 163 | ENDDO |
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| 164 | |
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| 165 | ! |
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| 166 | !-- In case of multigrid method, compute grid lengths and grid factors for the |
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| 167 | !-- grid levels |
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| 168 | IF ( psolver == 'multigrid' ) THEN |
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| 169 | |
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| 170 | ALLOCATE( ddx2_mg(maximum_grid_level), ddy2_mg(maximum_grid_level), & |
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| 171 | dzu_mg(nzb+1:nzt+1,maximum_grid_level), & |
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| 172 | dzw_mg(nzb+1:nzt+1,maximum_grid_level), & |
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| 173 | f1_mg(nzb+1:nzt,maximum_grid_level), & |
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| 174 | f2_mg(nzb+1:nzt,maximum_grid_level), & |
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| 175 | f3_mg(nzb+1:nzt,maximum_grid_level) ) |
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| 176 | |
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| 177 | dzu_mg(:,maximum_grid_level) = dzu |
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| 178 | dzw_mg(:,maximum_grid_level) = dzw |
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| 179 | nzt_l = nzt |
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| 180 | DO l = maximum_grid_level-1, 1, -1 |
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| 181 | dzu_mg(nzb+1,l) = 2.0 * dzu_mg(nzb+1,l+1) |
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| 182 | dzw_mg(nzb+1,l) = 2.0 * dzw_mg(nzb+1,l+1) |
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| 183 | nzt_l = nzt_l / 2 |
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| 184 | DO k = 2, nzt_l+1 |
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| 185 | dzu_mg(k,l) = dzu_mg(2*k-2,l+1) + dzu_mg(2*k-1,l+1) |
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| 186 | dzw_mg(k,l) = dzw_mg(2*k-2,l+1) + dzw_mg(2*k-1,l+1) |
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| 187 | ENDDO |
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| 188 | ENDDO |
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| 189 | |
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| 190 | nzt_l = nzt |
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| 191 | dx_l = dx |
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| 192 | dy_l = dy |
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| 193 | DO l = maximum_grid_level, 1, -1 |
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| 194 | ddx2_mg(l) = 1.0 / dx_l**2 |
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| 195 | ddy2_mg(l) = 1.0 / dy_l**2 |
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| 196 | DO k = nzb+1, nzt_l |
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| 197 | f2_mg(k,l) = 1.0 / ( dzu_mg(k+1,l) * dzw_mg(k,l) ) |
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| 198 | f3_mg(k,l) = 1.0 / ( dzu_mg(k,l) * dzw_mg(k,l) ) |
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| 199 | f1_mg(k,l) = 2.0 * ( ddx2_mg(l) + ddy2_mg(l) ) + & |
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| 200 | f2_mg(k,l) + f3_mg(k,l) |
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| 201 | ENDDO |
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| 202 | nzt_l = nzt_l / 2 |
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| 203 | dx_l = dx_l * 2.0 |
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| 204 | dy_l = dy_l * 2.0 |
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| 205 | ENDDO |
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| 206 | |
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| 207 | ENDIF |
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| 208 | |
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| 209 | ! |
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| 210 | !-- Compute the reciprocal values of the horizontal grid lengths. |
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| 211 | ddx = 1.0 / dx |
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| 212 | ddy = 1.0 / dy |
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| 213 | dx2 = dx * dx |
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| 214 | dy2 = dy * dy |
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| 215 | ddx2 = 1.0 / dx2 |
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| 216 | ddy2 = 1.0 / dy2 |
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| 217 | |
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| 218 | ! |
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| 219 | !-- Compute the grid-dependent mixing length. |
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| 220 | DO k = 1, nzt |
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| 221 | l_grid(k) = ( dx * dy * dzw(k) )**0.33333333333333 |
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| 222 | ENDDO |
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| 223 | |
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| 224 | ! |
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| 225 | !-- Allocate outer and inner index arrays for topography and set |
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| 226 | !-- defaults. |
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| 227 | !-- nzb_local has to contain additional layers of ghost points for calculating |
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| 228 | !-- the flag arrays needed for the multigrid method |
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| 229 | gls = 2**( maximum_grid_level ) |
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| 230 | ALLOCATE( corner_nl(nys:nyn,nxl:nxr), corner_nr(nys:nyn,nxl:nxr), & |
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| 231 | corner_sl(nys:nyn,nxl:nxr), corner_sr(nys:nyn,nxl:nxr), & |
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| 232 | nzb_local(-gls:ny+gls,-gls:nx+gls), nzb_tmp(-1:ny+1,-1:nx+1), & |
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| 233 | wall_l(nys:nyn,nxl:nxr), wall_n(nys:nyn,nxl:nxr), & |
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| 234 | wall_r(nys:nyn,nxl:nxr), wall_s(nys:nyn,nxl:nxr) ) |
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| 235 | ALLOCATE( fwxm(nys-1:nyn+1,nxl-1:nxr+1), fwxp(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 236 | fwym(nys-1:nyn+1,nxl-1:nxr+1), fwyp(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 237 | fxm(nys-1:nyn+1,nxl-1:nxr+1), fxp(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 238 | fym(nys-1:nyn+1,nxl-1:nxr+1), fyp(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 239 | nzb_s_inner(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 240 | nzb_s_outer(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 241 | nzb_u_inner(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 242 | nzb_u_outer(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 243 | nzb_v_inner(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 244 | nzb_v_outer(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 245 | nzb_w_inner(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 246 | nzb_w_outer(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 247 | nzb_diff_s_inner(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 248 | nzb_diff_s_outer(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 249 | nzb_diff_u(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 250 | nzb_diff_v(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 251 | nzb_2d(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 252 | wall_e_x(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 253 | wall_e_y(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 254 | wall_u(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 255 | wall_v(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 256 | wall_w_x(nys-1:nyn+1,nxl-1:nxr+1), & |
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| 257 | wall_w_y(nys-1:nyn+1,nxl-1:nxr+1) ) |
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| 258 | |
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| 259 | ALLOCATE( l_wall(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) ) |
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| 260 | |
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| 261 | nzb_s_inner = nzb; nzb_s_outer = nzb |
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| 262 | nzb_u_inner = nzb; nzb_u_outer = nzb |
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| 263 | nzb_v_inner = nzb; nzb_v_outer = nzb |
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| 264 | nzb_w_inner = nzb; nzb_w_outer = nzb |
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| 265 | |
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| 266 | ! |
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| 267 | !-- Define vertical gridpoint from (or to) which on the usual finite difference |
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| 268 | !-- form (which does not use surface fluxes) is applied |
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| 269 | IF ( prandtl_layer .OR. use_surface_fluxes ) THEN |
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| 270 | nzb_diff = nzb + 2 |
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| 271 | ELSE |
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| 272 | nzb_diff = nzb + 1 |
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| 273 | ENDIF |
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| 274 | IF ( use_top_fluxes ) THEN |
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| 275 | nzt_diff = nzt - 1 |
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| 276 | ELSE |
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| 277 | nzt_diff = nzt |
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| 278 | ENDIF |
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| 279 | |
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| 280 | nzb_diff_s_inner = nzb_diff; nzb_diff_s_outer = nzb_diff |
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| 281 | nzb_diff_u = nzb_diff; nzb_diff_v = nzb_diff |
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| 282 | |
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| 283 | wall_e_x = 0.0; wall_e_y = 0.0; wall_u = 0.0; wall_v = 0.0 |
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| 284 | wall_w_x = 0.0; wall_w_y = 0.0 |
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| 285 | fwxp = 1.0; fwxm = 1.0; fwyp = 1.0; fwym = 1.0 |
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| 286 | fxp = 1.0; fxm = 1.0; fyp = 1.0; fym = 1.0 |
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| 287 | |
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| 288 | ! |
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| 289 | !-- Initialize near-wall mixing length l_wall only in the vertical direction |
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| 290 | !-- for the moment, |
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| 291 | !-- multiplication with wall_adjustment_factor near the end of this routine |
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| 292 | l_wall(nzb,:,:) = l_grid(1) |
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| 293 | DO k = nzb+1, nzt |
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| 294 | l_wall(k,:,:) = l_grid(k) |
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| 295 | ENDDO |
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| 296 | l_wall(nzt+1,:,:) = l_grid(nzt) |
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| 297 | |
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| 298 | ALLOCATE ( vertical_influence(nzb:nzt) ) |
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| 299 | DO k = 1, nzt |
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| 300 | vertical_influence(k) = MIN ( INT( l_grid(k) / & |
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| 301 | ( wall_adjustment_factor * dzw(k) ) + 0.5 ), nzt - k ) |
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| 302 | ENDDO |
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| 303 | |
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| 304 | DO k = 1, MAXVAL( nzb_s_inner ) |
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| 305 | IF ( l_grid(k) > 1.5 * dx * wall_adjustment_factor .OR. & |
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| 306 | l_grid(k) > 1.5 * dy * wall_adjustment_factor ) THEN |
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| 307 | IF ( myid == 0 ) THEN |
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| 308 | PRINT*, '+++ WARNING: grid anisotropy exceeds '// & |
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| 309 | 'threshold given by only local' |
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| 310 | PRINT*, ' horizontal reduction of near_wall '// & |
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| 311 | 'mixing length l_wall' |
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| 312 | PRINT*, ' starting from height level k = ', k, '.' |
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| 313 | ENDIF |
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| 314 | EXIT |
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| 315 | ENDIF |
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| 316 | ENDDO |
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| 317 | vertical_influence(0) = vertical_influence(1) |
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| 318 | |
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| 319 | DO i = nxl-1, nxr+1 |
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| 320 | DO j = nys-1, nyn+1 |
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| 321 | DO k = nzb_s_inner(j,i) + 1, & |
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| 322 | nzb_s_inner(j,i) + vertical_influence(nzb_s_inner(j,i)) |
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| 323 | l_wall(k,j,i) = zu(k) - zw(nzb_s_inner(j,i)) |
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| 324 | ENDDO |
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| 325 | ENDDO |
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| 326 | ENDDO |
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| 327 | |
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| 328 | ! |
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| 329 | !-- Set outer and inner index arrays for non-flat topography. |
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| 330 | !-- Here consistency checks concerning domain size and periodicity are |
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| 331 | !-- necessary. |
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| 332 | !-- Within this SELECT CASE structure only nzb_local is initialized |
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| 333 | !-- individually depending on the chosen topography type, all other index |
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| 334 | !-- arrays are initialized further below. |
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| 335 | SELECT CASE ( TRIM( topography ) ) |
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| 336 | |
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| 337 | CASE ( 'flat' ) |
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| 338 | ! |
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| 339 | !-- No actions necessary |
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| 340 | |
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| 341 | CASE ( 'single_building' ) |
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| 342 | ! |
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| 343 | !-- Single rectangular building, by default centered in the middle of the |
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| 344 | !-- total domain |
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| 345 | blx = NINT( building_length_x / dx ) |
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| 346 | bly = NINT( building_length_y / dy ) |
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| 347 | bh = NINT( building_height / dz ) |
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| 348 | |
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| 349 | IF ( building_wall_left == 9999999.9 ) THEN |
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| 350 | building_wall_left = ( nx + 1 - blx ) / 2 * dx |
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| 351 | ENDIF |
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| 352 | bxl = NINT( building_wall_left / dx ) |
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| 353 | bxr = bxl + blx |
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| 354 | |
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| 355 | IF ( building_wall_south == 9999999.9 ) THEN |
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| 356 | building_wall_south = ( ny + 1 - bly ) / 2 * dy |
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| 357 | ENDIF |
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| 358 | bys = NINT( building_wall_south / dy ) |
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| 359 | byn = bys + bly |
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| 360 | |
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| 361 | ! |
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| 362 | !-- Building size has to meet some requirements |
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| 363 | IF ( ( bxl < 1 ) .OR. ( bxr > nx-1 ) .OR. ( bxr < bxl+3 ) .OR. & |
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| 364 | ( bys < 1 ) .OR. ( byn > ny-1 ) .OR. ( byn < bys+3 ) ) THEN |
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| 365 | IF ( myid == 0 ) THEN |
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| 366 | PRINT*, '+++ init_grid: inconsistent building parameters:' |
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| 367 | PRINT*, ' bxl=', bxl, 'bxr=', bxr, 'bys=', bys, & |
|---|
| 368 | 'byn=', byn, 'nx=', nx, 'ny=', ny |
|---|
| 369 | ENDIF |
|---|
| 370 | CALL local_stop |
|---|
| 371 | ENDIF |
|---|
| 372 | |
|---|
| 373 | ! |
|---|
| 374 | !-- Set the actual total size of the building. Due to the staggered grid, |
|---|
| 375 | !-- the building will be displaced by -0.5dx in x-direction and by -0.5dy |
|---|
| 376 | !-- in y-direction compared to the scalar grid. |
|---|
| 377 | nzb_local = 0 |
|---|
| 378 | nzb_local(bys:byn,bxl:bxr) = bh |
|---|
| 379 | |
|---|
| 380 | CASE ( 'read_from_file' ) |
|---|
| 381 | ! |
|---|
| 382 | !-- Arbitrary irregular topography data in PALM format (exactly matching |
|---|
| 383 | !-- the grid size and total domain size) |
|---|
| 384 | OPEN( 90, FILE='TOPOGRAPHY_DATA', STATUS='OLD', FORM='FORMATTED', & |
|---|
| 385 | ERR=10 ) |
|---|
| 386 | DO j = ny, 0, -1 |
|---|
| 387 | READ( 90, *, ERR=11, END=11 ) ( topo_height(j,i), i = 0, nx ) |
|---|
| 388 | ENDDO |
|---|
| 389 | ! |
|---|
| 390 | !-- Calculate the index height of the topography |
|---|
| 391 | DO i = 0, nx |
|---|
| 392 | DO j = 0, ny |
|---|
| 393 | nzb_local(j,i) = NINT( topo_height(j,i) / dz ) |
|---|
| 394 | ENDDO |
|---|
| 395 | ENDDO |
|---|
| 396 | ! |
|---|
| 397 | !-- Add cyclic boundaries (additional layers are for calculating flag |
|---|
| 398 | !-- arrays needed for the multigrid sover) |
|---|
| 399 | nzb_local(-gls:-1,0:nx) = nzb_local(ny-gls+1:ny,0:nx) |
|---|
| 400 | nzb_local(ny+1:ny+gls,0:nx) = nzb_local(0:gls-1,0:nx) |
|---|
| 401 | nzb_local(:,-gls:-1) = nzb_local(:,nx-gls+1:nx) |
|---|
| 402 | nzb_local(:,nx+1:nx+gls) = nzb_local(:,0:gls-1) |
|---|
| 403 | |
|---|
| 404 | GOTO 12 |
|---|
| 405 | |
|---|
| 406 | 10 IF ( myid == 0 ) THEN |
|---|
| 407 | PRINT*, '+++ init_grid: file TOPOGRAPHY_DATA does not exist' |
|---|
| 408 | ENDIF |
|---|
| 409 | CALL local_stop |
|---|
| 410 | |
|---|
| 411 | 11 IF ( myid == 0 ) THEN |
|---|
| 412 | PRINT*, '+++ init_grid: errors in file TOPOGRAPHY_DATA' |
|---|
| 413 | ENDIF |
|---|
| 414 | CALL local_stop |
|---|
| 415 | |
|---|
| 416 | 12 CLOSE( 90 ) |
|---|
| 417 | |
|---|
| 418 | CASE DEFAULT |
|---|
| 419 | ! |
|---|
| 420 | !-- The DEFAULT case is reached either if the parameter topography |
|---|
| 421 | !-- contains a wrong character string or if the user has coded a special |
|---|
| 422 | !-- case in the user interface. There, the subroutine user_init_grid |
|---|
| 423 | !-- checks which of these two conditions applies. |
|---|
| 424 | CALL user_init_grid( gls, nzb_local ) |
|---|
| 425 | |
|---|
| 426 | END SELECT |
|---|
| 427 | |
|---|
| 428 | ! |
|---|
| 429 | !-- Test output of nzb_local -1:ny+1,-1:nx+1 |
|---|
| 430 | ! WRITE (9,*) '*** nzb_local ***' |
|---|
| 431 | ! DO j = ny+1, -1, -1 |
|---|
| 432 | ! WRITE (9,'(194(1X,I2))') ( nzb_local(j,i), i = -1, nx+1 ) |
|---|
| 433 | ! ENDDO |
|---|
| 434 | |
|---|
| 435 | ! |
|---|
| 436 | !-- Consistency checks and index array initialization are only required for |
|---|
| 437 | !-- non-flat topography, also the initialization of topography heigth arrays |
|---|
| 438 | !-- zu_s_inner and zw_w_inner |
|---|
| 439 | IF ( TRIM( topography ) /= 'flat' ) THEN |
|---|
| 440 | |
|---|
| 441 | ! |
|---|
| 442 | !-- Consistency checks |
|---|
| 443 | IF ( MINVAL( nzb_local ) < 0 .OR. MAXVAL( nzb_local ) > nz + 1 ) THEN |
|---|
| 444 | IF ( myid == 0 ) THEN |
|---|
| 445 | PRINT*, '+++ init_grid: nzb_local values are outside the', & |
|---|
| 446 | 'model domain' |
|---|
| 447 | PRINT*, ' MINVAL( nzb_local ) = ', MINVAL(nzb_local) |
|---|
| 448 | PRINT*, ' MAXVAL( nzb_local ) = ', MAXVAL(nzb_local) |
|---|
| 449 | ENDIF |
|---|
| 450 | CALL local_stop |
|---|
| 451 | ENDIF |
|---|
| 452 | |
|---|
| 453 | IF ( bc_lr == 'cyclic' ) THEN |
|---|
| 454 | IF ( ANY( nzb_local(:,-1) /= nzb_local(:,nx) ) .OR. & |
|---|
| 455 | ANY( nzb_local(:,0) /= nzb_local(:,nx+1) ) ) THEN |
|---|
| 456 | IF ( myid == 0 ) THEN |
|---|
| 457 | PRINT*, '+++ init_grid: nzb_local does not fulfill cyclic', & |
|---|
| 458 | ' boundary condition in x-direction' |
|---|
| 459 | ENDIF |
|---|
| 460 | CALL local_stop |
|---|
| 461 | ENDIF |
|---|
| 462 | ENDIF |
|---|
| 463 | IF ( bc_ns == 'cyclic' ) THEN |
|---|
| 464 | IF ( ANY( nzb_local(-1,:) /= nzb_local(ny,:) ) .OR. & |
|---|
| 465 | ANY( nzb_local(0,:) /= nzb_local(ny+1,:) ) ) THEN |
|---|
| 466 | IF ( myid == 0 ) THEN |
|---|
| 467 | PRINT*, '+++ init_grid: nzb_local does not fulfill cyclic', & |
|---|
| 468 | ' boundary condition in y-direction' |
|---|
| 469 | ENDIF |
|---|
| 470 | CALL local_stop |
|---|
| 471 | ENDIF |
|---|
| 472 | ENDIF |
|---|
| 473 | |
|---|
| 474 | ! |
|---|
| 475 | !-- The array nzb_local as defined above describes the actual total size of |
|---|
| 476 | !-- topography which is defined by u=0 on the topography walls in x-direction |
|---|
| 477 | !-- and by v=0 on the topography walls in y-direction. However, PALM uses |
|---|
| 478 | !-- individual arrays nzb_u|v|w|s_inner|outer that are based on nzb_s_inner. |
|---|
| 479 | !-- Therefore, the extent of topography in nzb_local is now reduced by 1dx |
|---|
| 480 | !-- at the E topography walls and by 1dy at the N topography walls to form |
|---|
| 481 | !-- the basis for nzb_s_inner. |
|---|
| 482 | DO j = -gls, ny + gls |
|---|
| 483 | DO i = -gls, nx |
|---|
| 484 | nzb_local(j,i) = MIN( nzb_local(j,i), nzb_local(j,i+1) ) |
|---|
| 485 | ENDDO |
|---|
| 486 | ENDDO |
|---|
| 487 | !-- apply cyclic boundary conditions in x-direction |
|---|
| 488 | nzb_local(:,nx+1:nx+gls) = nzb_local(:,0:gls-1) |
|---|
| 489 | DO i = -gls, nx + gls |
|---|
| 490 | DO j = -gls, ny |
|---|
| 491 | nzb_local(j,i) = MIN( nzb_local(j,i), nzb_local(j+1,i) ) |
|---|
| 492 | ENDDO |
|---|
| 493 | ENDDO |
|---|
| 494 | !-- apply cyclic boundary conditions in y-direction |
|---|
| 495 | nzb_local(ny+1:ny+gls,:) = nzb_local(0:gls-1,:) |
|---|
| 496 | |
|---|
| 497 | ! |
|---|
| 498 | !-- Initialize index arrays nzb_s_inner and nzb_w_inner |
|---|
| 499 | nzb_s_inner = nzb_local(nys-1:nyn+1,nxl-1:nxr+1) |
|---|
| 500 | nzb_w_inner = nzb_local(nys-1:nyn+1,nxl-1:nxr+1) |
|---|
| 501 | |
|---|
| 502 | ! |
|---|
| 503 | !-- Initialize remaining index arrays: |
|---|
| 504 | !-- first pre-initialize them with nzb_s_inner... |
|---|
| 505 | nzb_u_inner = nzb_s_inner |
|---|
| 506 | nzb_u_outer = nzb_s_inner |
|---|
| 507 | nzb_v_inner = nzb_s_inner |
|---|
| 508 | nzb_v_outer = nzb_s_inner |
|---|
| 509 | nzb_w_outer = nzb_s_inner |
|---|
| 510 | nzb_s_outer = nzb_s_inner |
|---|
| 511 | |
|---|
| 512 | ! |
|---|
| 513 | !-- ...then extend pre-initialized arrays in their according directions |
|---|
| 514 | !-- based on nzb_local using nzb_tmp as a temporary global index array |
|---|
| 515 | |
|---|
| 516 | ! |
|---|
| 517 | !-- nzb_s_outer: |
|---|
| 518 | !-- extend nzb_local east-/westwards first, then north-/southwards |
|---|
| 519 | nzb_tmp = nzb_local(-1:ny+1,-1:nx+1) |
|---|
| 520 | DO j = -1, ny + 1 |
|---|
| 521 | DO i = 0, nx |
|---|
| 522 | nzb_tmp(j,i) = MAX( nzb_local(j,i-1), nzb_local(j,i), & |
|---|
| 523 | nzb_local(j,i+1) ) |
|---|
| 524 | ENDDO |
|---|
| 525 | ENDDO |
|---|
| 526 | DO i = nxl, nxr |
|---|
| 527 | DO j = nys, nyn |
|---|
| 528 | nzb_s_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i), & |
|---|
| 529 | nzb_tmp(j+1,i) ) |
|---|
| 530 | ENDDO |
|---|
| 531 | ! |
|---|
| 532 | !-- non-cyclic boundary conditions (overwritten by call of |
|---|
| 533 | !-- exchange_horiz_2d_int below in case of cyclic boundary conditions) |
|---|
| 534 | IF ( nys == 0 ) THEN |
|---|
| 535 | j = -1 |
|---|
| 536 | nzb_s_outer(j,i) = MAX( nzb_tmp(j+1,i), nzb_tmp(j,i) ) |
|---|
| 537 | ENDIF |
|---|
| 538 | IF ( nys == ny ) THEN |
|---|
| 539 | j = ny + 1 |
|---|
| 540 | nzb_s_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i) ) |
|---|
| 541 | ENDIF |
|---|
| 542 | ENDDO |
|---|
| 543 | ! |
|---|
| 544 | !-- nzb_w_outer: |
|---|
| 545 | !-- identical to nzb_s_outer |
|---|
| 546 | nzb_w_outer = nzb_s_outer |
|---|
| 547 | |
|---|
| 548 | ! |
|---|
| 549 | !-- nzb_u_inner: |
|---|
| 550 | !-- extend nzb_local rightwards only |
|---|
| 551 | nzb_tmp = nzb_local(-1:ny+1,-1:nx+1) |
|---|
| 552 | DO j = -1, ny + 1 |
|---|
| 553 | DO i = 0, nx + 1 |
|---|
| 554 | nzb_tmp(j,i) = MAX( nzb_local(j,i-1), nzb_local(j,i) ) |
|---|
| 555 | ENDDO |
|---|
| 556 | ENDDO |
|---|
| 557 | nzb_u_inner = nzb_tmp(nys-1:nyn+1,nxl-1:nxr+1) |
|---|
| 558 | |
|---|
| 559 | ! |
|---|
| 560 | !-- nzb_u_outer: |
|---|
| 561 | !-- extend current nzb_tmp (nzb_u_inner) north-/southwards |
|---|
| 562 | DO i = nxl, nxr |
|---|
| 563 | DO j = nys, nyn |
|---|
| 564 | nzb_u_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i), & |
|---|
| 565 | nzb_tmp(j+1,i) ) |
|---|
| 566 | ENDDO |
|---|
| 567 | ! |
|---|
| 568 | !-- non-cyclic boundary conditions (overwritten by call of |
|---|
| 569 | !-- exchange_horiz_2d_int below in case of cyclic boundary conditions) |
|---|
| 570 | IF ( nys == 0 ) THEN |
|---|
| 571 | j = -1 |
|---|
| 572 | nzb_u_outer(j,i) = MAX( nzb_tmp(j+1,i), nzb_tmp(j,i) ) |
|---|
| 573 | ENDIF |
|---|
| 574 | IF ( nys == ny ) THEN |
|---|
| 575 | j = ny + 1 |
|---|
| 576 | nzb_u_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i) ) |
|---|
| 577 | ENDIF |
|---|
| 578 | ENDDO |
|---|
| 579 | |
|---|
| 580 | ! |
|---|
| 581 | !-- nzb_v_inner: |
|---|
| 582 | !-- extend nzb_local northwards only |
|---|
| 583 | nzb_tmp = nzb_local(-1:ny+1,-1:nx+1) |
|---|
| 584 | DO i = -1, nx + 1 |
|---|
| 585 | DO j = 0, ny + 1 |
|---|
| 586 | nzb_tmp(j,i) = MAX( nzb_local(j-1,i), nzb_local(j,i) ) |
|---|
| 587 | ENDDO |
|---|
| 588 | ENDDO |
|---|
| 589 | nzb_v_inner = nzb_tmp(nys-1:nyn+1,nxl-1:nxr+1) |
|---|
| 590 | |
|---|
| 591 | ! |
|---|
| 592 | !-- nzb_v_outer: |
|---|
| 593 | !-- extend current nzb_tmp (nzb_v_inner) right-/leftwards |
|---|
| 594 | DO j = nys, nyn |
|---|
| 595 | DO i = nxl, nxr |
|---|
| 596 | nzb_v_outer(j,i) = MAX( nzb_tmp(j,i-1), nzb_tmp(j,i), & |
|---|
| 597 | nzb_tmp(j,i+1) ) |
|---|
| 598 | ENDDO |
|---|
| 599 | ! |
|---|
| 600 | !-- non-cyclic boundary conditions (overwritten by call of |
|---|
| 601 | !-- exchange_horiz_2d_int below in case of cyclic boundary conditions) |
|---|
| 602 | IF ( nxl == 0 ) THEN |
|---|
| 603 | i = -1 |
|---|
| 604 | nzb_v_outer(j,i) = MAX( nzb_tmp(j,i+1), nzb_tmp(j,i) ) |
|---|
| 605 | ENDIF |
|---|
| 606 | IF ( nxr == nx ) THEN |
|---|
| 607 | i = nx + 1 |
|---|
| 608 | nzb_v_outer(j,i) = MAX( nzb_tmp(j,i-1), nzb_tmp(j,i) ) |
|---|
| 609 | ENDIF |
|---|
| 610 | ENDDO |
|---|
| 611 | |
|---|
| 612 | ! |
|---|
| 613 | !-- Exchange of lateral boundary values (parallel computers) and cyclic |
|---|
| 614 | !-- boundary conditions, if applicable. |
|---|
| 615 | !-- Since nzb_s_inner and nzb_w_inner are derived directly from nzb_local |
|---|
| 616 | !-- they do not require exchange and are not included here. |
|---|
| 617 | CALL exchange_horiz_2d_int( nzb_u_inner ) |
|---|
| 618 | CALL exchange_horiz_2d_int( nzb_u_outer ) |
|---|
| 619 | CALL exchange_horiz_2d_int( nzb_v_inner ) |
|---|
| 620 | CALL exchange_horiz_2d_int( nzb_v_outer ) |
|---|
| 621 | CALL exchange_horiz_2d_int( nzb_w_outer ) |
|---|
| 622 | CALL exchange_horiz_2d_int( nzb_s_outer ) |
|---|
| 623 | |
|---|
| 624 | ! |
|---|
| 625 | !-- Allocate and set the arrays containing the topography height |
|---|
| 626 | IF ( myid == 0 ) THEN |
|---|
| 627 | |
|---|
| 628 | ALLOCATE( zu_s_inner(0:nx+1,0:ny+1), zw_w_inner(0:nx+1,0:ny+1) ) |
|---|
| 629 | |
|---|
| 630 | DO i = 0, nx + 1 |
|---|
| 631 | DO j = 0, ny + 1 |
|---|
| 632 | zu_s_inner(i,j) = zu(nzb_local(j,i)) |
|---|
| 633 | zw_w_inner(i,j) = zw(nzb_local(j,i)) |
|---|
| 634 | ENDDO |
|---|
| 635 | ENDDO |
|---|
| 636 | |
|---|
| 637 | ENDIF |
|---|
| 638 | |
|---|
| 639 | ENDIF |
|---|
| 640 | |
|---|
| 641 | ! |
|---|
| 642 | !-- Preliminary: to be removed after completion of the topography code! |
|---|
| 643 | !-- Set the former default k index arrays nzb_2d |
|---|
| 644 | nzb_2d = nzb |
|---|
| 645 | |
|---|
| 646 | ! |
|---|
| 647 | !-- Set the individual index arrays which define the k index from which on |
|---|
| 648 | !-- the usual finite difference form (which does not use surface fluxes) is |
|---|
| 649 | !-- applied |
|---|
| 650 | IF ( prandtl_layer .OR. use_surface_fluxes ) THEN |
|---|
| 651 | nzb_diff_u = nzb_u_inner + 2 |
|---|
| 652 | nzb_diff_v = nzb_v_inner + 2 |
|---|
| 653 | nzb_diff_s_inner = nzb_s_inner + 2 |
|---|
| 654 | nzb_diff_s_outer = nzb_s_outer + 2 |
|---|
| 655 | ELSE |
|---|
| 656 | nzb_diff_u = nzb_u_inner + 1 |
|---|
| 657 | nzb_diff_v = nzb_v_inner + 1 |
|---|
| 658 | nzb_diff_s_inner = nzb_s_inner + 1 |
|---|
| 659 | nzb_diff_s_outer = nzb_s_outer + 1 |
|---|
| 660 | ENDIF |
|---|
| 661 | |
|---|
| 662 | ! |
|---|
| 663 | !-- Calculation of wall switches and factors required by diffusion_u/v.f90 and |
|---|
| 664 | !-- for limitation of near-wall mixing length l_wall further below |
|---|
| 665 | corner_nl = 0 |
|---|
| 666 | corner_nr = 0 |
|---|
| 667 | corner_sl = 0 |
|---|
| 668 | corner_sr = 0 |
|---|
| 669 | wall_l = 0 |
|---|
| 670 | wall_n = 0 |
|---|
| 671 | wall_r = 0 |
|---|
| 672 | wall_s = 0 |
|---|
| 673 | |
|---|
| 674 | DO i = nxl, nxr |
|---|
| 675 | DO j = nys, nyn |
|---|
| 676 | ! |
|---|
| 677 | !-- u-component |
|---|
| 678 | IF ( nzb_u_outer(j,i) > nzb_u_outer(j+1,i) ) THEN |
|---|
| 679 | wall_u(j,i) = 1.0 ! north wall (location of adjacent fluid) |
|---|
| 680 | fym(j,i) = 0.0 |
|---|
| 681 | fyp(j,i) = 1.0 |
|---|
| 682 | ELSEIF ( nzb_u_outer(j,i) > nzb_u_outer(j-1,i) ) THEN |
|---|
| 683 | wall_u(j,i) = 1.0 ! south wall (location of adjacent fluid) |
|---|
| 684 | fym(j,i) = 1.0 |
|---|
| 685 | fyp(j,i) = 0.0 |
|---|
| 686 | ENDIF |
|---|
| 687 | ! |
|---|
| 688 | !-- v-component |
|---|
| 689 | IF ( nzb_v_outer(j,i) > nzb_v_outer(j,i+1) ) THEN |
|---|
| 690 | wall_v(j,i) = 1.0 ! rigth wall (location of adjacent fluid) |
|---|
| 691 | fxm(j,i) = 0.0 |
|---|
| 692 | fxp(j,i) = 1.0 |
|---|
| 693 | ELSEIF ( nzb_v_outer(j,i) > nzb_v_outer(j,i-1) ) THEN |
|---|
| 694 | wall_v(j,i) = 1.0 ! left wall (location of adjacent fluid) |
|---|
| 695 | fxm(j,i) = 1.0 |
|---|
| 696 | fxp(j,i) = 0.0 |
|---|
| 697 | ENDIF |
|---|
| 698 | ! |
|---|
| 699 | !-- w-component, also used for scalars, separate arrays for shear |
|---|
| 700 | !-- production of tke |
|---|
| 701 | IF ( nzb_w_outer(j,i) > nzb_w_outer(j+1,i) ) THEN |
|---|
| 702 | wall_e_y(j,i) = 1.0 ! north wall (location of adjacent fluid) |
|---|
| 703 | wall_w_y(j,i) = 1.0 |
|---|
| 704 | fwym(j,i) = 0.0 |
|---|
| 705 | fwyp(j,i) = 1.0 |
|---|
| 706 | ELSEIF ( nzb_w_outer(j,i) > nzb_w_outer(j-1,i) ) THEN |
|---|
| 707 | wall_e_y(j,i) = -1.0 ! south wall (location of adjacent fluid) |
|---|
| 708 | wall_w_y(j,i) = 1.0 |
|---|
| 709 | fwym(j,i) = 1.0 |
|---|
| 710 | fwyp(j,i) = 0.0 |
|---|
| 711 | ENDIF |
|---|
| 712 | IF ( nzb_w_outer(j,i) > nzb_w_outer(j,i+1) ) THEN |
|---|
| 713 | wall_e_x(j,i) = 1.0 ! right wall (location of adjacent fluid) |
|---|
| 714 | wall_w_x(j,i) = 1.0 |
|---|
| 715 | fwxm(j,i) = 0.0 |
|---|
| 716 | fwxp(j,i) = 1.0 |
|---|
| 717 | ELSEIF ( nzb_w_outer(j,i) > nzb_w_outer(j,i-1) ) THEN |
|---|
| 718 | wall_e_x(j,i) = -1.0 ! left wall (location of adjacent fluid) |
|---|
| 719 | wall_w_x(j,i) = 1.0 |
|---|
| 720 | fwxm(j,i) = 1.0 |
|---|
| 721 | fwxp(j,i) = 0.0 |
|---|
| 722 | ENDIF |
|---|
| 723 | ! |
|---|
| 724 | !-- Wall and corner locations inside buildings for limitation of |
|---|
| 725 | !-- near-wall mixing length l_wall |
|---|
| 726 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j+1,i) ) THEN |
|---|
| 727 | |
|---|
| 728 | wall_n(j,i) = nzb_s_inner(j+1,i) + 1 ! North wall |
|---|
| 729 | |
|---|
| 730 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i-1) ) THEN |
|---|
| 731 | corner_nl(j,i) = MAX( nzb_s_inner(j+1,i), & ! Northleft corner |
|---|
| 732 | nzb_s_inner(j,i-1) ) + 1 |
|---|
| 733 | ENDIF |
|---|
| 734 | |
|---|
| 735 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i+1) ) THEN |
|---|
| 736 | corner_nr(j,i) = MAX( nzb_s_inner(j+1,i), & ! Northright corner |
|---|
| 737 | nzb_s_inner(j,i+1) ) + 1 |
|---|
| 738 | ENDIF |
|---|
| 739 | |
|---|
| 740 | ENDIF |
|---|
| 741 | |
|---|
| 742 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j-1,i) ) THEN |
|---|
| 743 | |
|---|
| 744 | wall_s(j,i) = nzb_s_inner(j-1,i) + 1 ! South wall |
|---|
| 745 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i-1) ) THEN |
|---|
| 746 | corner_sl(j,i) = MAX( nzb_s_inner(j-1,i), & ! Southleft corner |
|---|
| 747 | nzb_s_inner(j,i-1) ) + 1 |
|---|
| 748 | ENDIF |
|---|
| 749 | |
|---|
| 750 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i+1) ) THEN |
|---|
| 751 | corner_sr(j,i) = MAX( nzb_s_inner(j-1,i), & ! Southright corner |
|---|
| 752 | nzb_s_inner(j,i+1) ) + 1 |
|---|
| 753 | ENDIF |
|---|
| 754 | |
|---|
| 755 | ENDIF |
|---|
| 756 | |
|---|
| 757 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i-1) ) THEN |
|---|
| 758 | wall_l(j,i) = nzb_s_inner(j,i-1) + 1 ! Left wall |
|---|
| 759 | ENDIF |
|---|
| 760 | |
|---|
| 761 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i+1) ) THEN |
|---|
| 762 | wall_r(j,i) = nzb_s_inner(j,i+1) + 1 ! Right wall |
|---|
| 763 | ENDIF |
|---|
| 764 | |
|---|
| 765 | ENDDO |
|---|
| 766 | ENDDO |
|---|
| 767 | |
|---|
| 768 | ! |
|---|
| 769 | !-- Calculate wall flag arrays for the multigrid method |
|---|
| 770 | IF ( psolver == 'multigrid' ) THEN |
|---|
| 771 | ! |
|---|
| 772 | !-- Gridpoint increment of the current level |
|---|
| 773 | inc = 1 |
|---|
| 774 | |
|---|
| 775 | DO l = maximum_grid_level, 1 , -1 |
|---|
| 776 | |
|---|
| 777 | nxl_l = nxl_mg(l) |
|---|
| 778 | nxr_l = nxr_mg(l) |
|---|
| 779 | nys_l = nys_mg(l) |
|---|
| 780 | nyn_l = nyn_mg(l) |
|---|
| 781 | nzt_l = nzt_mg(l) |
|---|
| 782 | |
|---|
| 783 | ! |
|---|
| 784 | !-- Assign the flag level to be calculated |
|---|
| 785 | SELECT CASE ( l ) |
|---|
| 786 | CASE ( 1 ) |
|---|
| 787 | flags => wall_flags_1 |
|---|
| 788 | CASE ( 2 ) |
|---|
| 789 | flags => wall_flags_2 |
|---|
| 790 | CASE ( 3 ) |
|---|
| 791 | flags => wall_flags_3 |
|---|
| 792 | CASE ( 4 ) |
|---|
| 793 | flags => wall_flags_4 |
|---|
| 794 | CASE ( 5 ) |
|---|
| 795 | flags => wall_flags_5 |
|---|
| 796 | CASE ( 6 ) |
|---|
| 797 | flags => wall_flags_6 |
|---|
| 798 | CASE ( 7 ) |
|---|
| 799 | flags => wall_flags_7 |
|---|
| 800 | CASE ( 8 ) |
|---|
| 801 | flags => wall_flags_8 |
|---|
| 802 | CASE ( 9 ) |
|---|
| 803 | flags => wall_flags_9 |
|---|
| 804 | CASE ( 10 ) |
|---|
| 805 | flags => wall_flags_10 |
|---|
| 806 | END SELECT |
|---|
| 807 | |
|---|
| 808 | ! |
|---|
| 809 | !-- Depending on the grid level, set the respective bits in case of |
|---|
| 810 | !-- neighbouring walls |
|---|
| 811 | !-- Bit 0: wall to the bottom |
|---|
| 812 | !-- Bit 1: wall to the top (not realized in remaining PALM code so far) |
|---|
| 813 | !-- Bit 2: wall to the south |
|---|
| 814 | !-- Bit 3: wall to the north |
|---|
| 815 | !-- Bit 4: wall to the left |
|---|
| 816 | !-- Bit 5: wall to the right |
|---|
| 817 | !-- Bit 6: inside building |
|---|
| 818 | |
|---|
| 819 | flags = 0 |
|---|
| 820 | |
|---|
| 821 | DO i = nxl_l-1, nxr_l+1 |
|---|
| 822 | DO j = nys_l-1, nyn_l+1 |
|---|
| 823 | DO k = nzb, nzt_l+1 |
|---|
| 824 | |
|---|
| 825 | ! |
|---|
| 826 | !-- Inside/outside building (inside building does not need |
|---|
| 827 | !-- further tests for walls) |
|---|
| 828 | IF ( k*inc <= nzb_local(j*inc,i*inc) ) THEN |
|---|
| 829 | |
|---|
| 830 | flags(k,j,i) = IBSET( flags(k,j,i), 6 ) |
|---|
| 831 | |
|---|
| 832 | ELSE |
|---|
| 833 | ! |
|---|
| 834 | !-- Bottom wall |
|---|
| 835 | IF ( (k-1)*inc <= nzb_local(j*inc,i*inc) ) THEN |
|---|
| 836 | flags(k,j,i) = IBSET( flags(k,j,i), 0 ) |
|---|
| 837 | ENDIF |
|---|
| 838 | ! |
|---|
| 839 | !-- South wall |
|---|
| 840 | IF ( k*inc <= nzb_local((j-1)*inc,i*inc) ) THEN |
|---|
| 841 | flags(k,j,i) = IBSET( flags(k,j,i), 2 ) |
|---|
| 842 | ENDIF |
|---|
| 843 | ! |
|---|
| 844 | !-- North wall |
|---|
| 845 | IF ( k*inc <= nzb_local((j+1)*inc,i*inc) ) THEN |
|---|
| 846 | flags(k,j,i) = IBSET( flags(k,j,i), 3 ) |
|---|
| 847 | ENDIF |
|---|
| 848 | ! |
|---|
| 849 | !-- Left wall |
|---|
| 850 | IF ( k*inc <= nzb_local(j*inc,(i-1)*inc) ) THEN |
|---|
| 851 | flags(k,j,i) = IBSET( flags(k,j,i), 4 ) |
|---|
| 852 | ENDIF |
|---|
| 853 | ! |
|---|
| 854 | !-- Right wall |
|---|
| 855 | IF ( k*inc <= nzb_local(j*inc,(i+1)*inc) ) THEN |
|---|
| 856 | flags(k,j,i) = IBSET( flags(k,j,i), 5 ) |
|---|
| 857 | ENDIF |
|---|
| 858 | |
|---|
| 859 | ENDIF |
|---|
| 860 | |
|---|
| 861 | ENDDO |
|---|
| 862 | ENDDO |
|---|
| 863 | ENDDO |
|---|
| 864 | |
|---|
| 865 | ! |
|---|
| 866 | !-- Test output of flag arrays |
|---|
| 867 | ! i = nxl_l |
|---|
| 868 | ! WRITE (9,*) ' ' |
|---|
| 869 | ! WRITE (9,*) '*** mg level ', l, ' ***', mg_switch_to_pe0_level |
|---|
| 870 | ! WRITE (9,*) ' inc=', inc, ' i =', nxl_l |
|---|
| 871 | ! WRITE (9,*) ' nxl_l',nxl_l,' nxr_l=',nxr_l,' nys_l=',nys_l,' nyn_l=',nyn_l |
|---|
| 872 | ! DO k = nzt_l+1, nzb, -1 |
|---|
| 873 | ! WRITE (9,'(194(1X,I2))') ( flags(k,j,i), j = nys_l-1, nyn_l+1 ) |
|---|
| 874 | ! ENDDO |
|---|
| 875 | |
|---|
| 876 | inc = inc * 2 |
|---|
| 877 | |
|---|
| 878 | ENDDO |
|---|
| 879 | |
|---|
| 880 | ENDIF |
|---|
| 881 | |
|---|
| 882 | ! |
|---|
| 883 | !-- In case of topography: limit near-wall mixing length l_wall further: |
|---|
| 884 | !-- Go through all points of the subdomain one by one and look for the closest |
|---|
| 885 | !-- surface |
|---|
| 886 | IF ( TRIM(topography) /= 'flat' ) THEN |
|---|
| 887 | DO i = nxl, nxr |
|---|
| 888 | DO j = nys, nyn |
|---|
| 889 | |
|---|
| 890 | nzb_si = nzb_s_inner(j,i) |
|---|
| 891 | vi = vertical_influence(nzb_si) |
|---|
| 892 | |
|---|
| 893 | IF ( wall_n(j,i) > 0 ) THEN |
|---|
| 894 | ! |
|---|
| 895 | !-- North wall (y distance) |
|---|
| 896 | DO k = wall_n(j,i), nzb_si |
|---|
| 897 | l_wall(k,j+1,i) = MIN( l_wall(k,j+1,i), 0.5 * dy ) |
|---|
| 898 | ENDDO |
|---|
| 899 | ! |
|---|
| 900 | !-- Above North wall (yz distance) |
|---|
| 901 | DO k = nzb_si + 1, nzb_si + vi |
|---|
| 902 | l_wall(k,j+1,i) = MIN( l_wall(k,j+1,i), & |
|---|
| 903 | SQRT( 0.25 * dy**2 + & |
|---|
| 904 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 905 | ENDDO |
|---|
| 906 | ! |
|---|
| 907 | !-- Northleft corner (xy distance) |
|---|
| 908 | IF ( corner_nl(j,i) > 0 ) THEN |
|---|
| 909 | DO k = corner_nl(j,i), nzb_si |
|---|
| 910 | l_wall(k,j+1,i-1) = MIN( l_wall(k,j+1,i-1), & |
|---|
| 911 | 0.5 * SQRT( dx**2 + dy**2 ) ) |
|---|
| 912 | ENDDO |
|---|
| 913 | ! |
|---|
| 914 | !-- Above Northleft corner (xyz distance) |
|---|
| 915 | DO k = nzb_si + 1, nzb_si + vi |
|---|
| 916 | l_wall(k,j+1,i-1) = MIN( l_wall(k,j+1,i-1), & |
|---|
| 917 | SQRT( 0.25 * (dx**2 + dy**2) + & |
|---|
| 918 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 919 | ENDDO |
|---|
| 920 | ENDIF |
|---|
| 921 | ! |
|---|
| 922 | !-- Northright corner (xy distance) |
|---|
| 923 | IF ( corner_nr(j,i) > 0 ) THEN |
|---|
| 924 | DO k = corner_nr(j,i), nzb_si |
|---|
| 925 | l_wall(k,j+1,i+1) = MIN( l_wall(k,j+1,i+1), & |
|---|
| 926 | 0.5 * SQRT( dx**2 + dy**2 ) ) |
|---|
| 927 | ENDDO |
|---|
| 928 | ! |
|---|
| 929 | !-- Above northright corner (xyz distance) |
|---|
| 930 | DO k = nzb_si + 1, nzb_si + vi |
|---|
| 931 | l_wall(k,j+1,i+1) = MIN( l_wall(k,j+1,i+1), & |
|---|
| 932 | SQRT( 0.25 * (dx**2 + dy**2) + & |
|---|
| 933 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 934 | ENDDO |
|---|
| 935 | ENDIF |
|---|
| 936 | ENDIF |
|---|
| 937 | |
|---|
| 938 | IF ( wall_s(j,i) > 0 ) THEN |
|---|
| 939 | ! |
|---|
| 940 | !-- South wall (y distance) |
|---|
| 941 | DO k = wall_s(j,i), nzb_si |
|---|
| 942 | l_wall(k,j-1,i) = MIN( l_wall(k,j-1,i), 0.5 * dy ) |
|---|
| 943 | ENDDO |
|---|
| 944 | ! |
|---|
| 945 | !-- Above south wall (yz distance) |
|---|
| 946 | DO k = nzb_si + 1, & |
|---|
| 947 | nzb_si + vi |
|---|
| 948 | l_wall(k,j-1,i) = MIN( l_wall(k,j-1,i), & |
|---|
| 949 | SQRT( 0.25 * dy**2 + & |
|---|
| 950 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 951 | ENDDO |
|---|
| 952 | ! |
|---|
| 953 | !-- Southleft corner (xy distance) |
|---|
| 954 | IF ( corner_sl(j,i) > 0 ) THEN |
|---|
| 955 | DO k = corner_sl(j,i), nzb_si |
|---|
| 956 | l_wall(k,j-1,i-1) = MIN( l_wall(k,j-1,i-1), & |
|---|
| 957 | 0.5 * SQRT( dx**2 + dy**2 ) ) |
|---|
| 958 | ENDDO |
|---|
| 959 | ! |
|---|
| 960 | !-- Above southleft corner (xyz distance) |
|---|
| 961 | DO k = nzb_si + 1, nzb_si + vi |
|---|
| 962 | l_wall(k,j-1,i-1) = MIN( l_wall(k,j-1,i-1), & |
|---|
| 963 | SQRT( 0.25 * (dx**2 + dy**2) + & |
|---|
| 964 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 965 | ENDDO |
|---|
| 966 | ENDIF |
|---|
| 967 | ! |
|---|
| 968 | !-- Southright corner (xy distance) |
|---|
| 969 | IF ( corner_sr(j,i) > 0 ) THEN |
|---|
| 970 | DO k = corner_sr(j,i), nzb_si |
|---|
| 971 | l_wall(k,j-1,i+1) = MIN( l_wall(k,j-1,i+1), & |
|---|
| 972 | 0.5 * SQRT( dx**2 + dy**2 ) ) |
|---|
| 973 | ENDDO |
|---|
| 974 | ! |
|---|
| 975 | !-- Above southright corner (xyz distance) |
|---|
| 976 | DO k = nzb_si + 1, nzb_si + vi |
|---|
| 977 | l_wall(k,j-1,i+1) = MIN( l_wall(k,j-1,i+1), & |
|---|
| 978 | SQRT( 0.25 * (dx**2 + dy**2) + & |
|---|
| 979 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 980 | ENDDO |
|---|
| 981 | ENDIF |
|---|
| 982 | |
|---|
| 983 | ENDIF |
|---|
| 984 | |
|---|
| 985 | IF ( wall_l(j,i) > 0 ) THEN |
|---|
| 986 | ! |
|---|
| 987 | !-- Left wall (x distance) |
|---|
| 988 | DO k = wall_l(j,i), nzb_si |
|---|
| 989 | l_wall(k,j,i-1) = MIN( l_wall(k,j,i-1), 0.5 * dx ) |
|---|
| 990 | ENDDO |
|---|
| 991 | ! |
|---|
| 992 | !-- Above left wall (xz distance) |
|---|
| 993 | DO k = nzb_si + 1, nzb_si + vi |
|---|
| 994 | l_wall(k,j,i-1) = MIN( l_wall(k,j,i-1), & |
|---|
| 995 | SQRT( 0.25 * dx**2 + & |
|---|
| 996 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 997 | ENDDO |
|---|
| 998 | ENDIF |
|---|
| 999 | |
|---|
| 1000 | IF ( wall_r(j,i) > 0 ) THEN |
|---|
| 1001 | ! |
|---|
| 1002 | !-- Right wall (x distance) |
|---|
| 1003 | DO k = wall_r(j,i), nzb_si |
|---|
| 1004 | l_wall(k,j,i+1) = MIN( l_wall(k,j,i+1), 0.5 * dx ) |
|---|
| 1005 | ENDDO |
|---|
| 1006 | ! |
|---|
| 1007 | !-- Above right wall (xz distance) |
|---|
| 1008 | DO k = nzb_si + 1, nzb_si + vi |
|---|
| 1009 | l_wall(k,j,i+1) = MIN( l_wall(k,j,i+1), & |
|---|
| 1010 | SQRT( 0.25 * dx**2 + & |
|---|
| 1011 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 1012 | ENDDO |
|---|
| 1013 | |
|---|
| 1014 | ENDIF |
|---|
| 1015 | |
|---|
| 1016 | ENDDO |
|---|
| 1017 | ENDDO |
|---|
| 1018 | |
|---|
| 1019 | ENDIF |
|---|
| 1020 | |
|---|
| 1021 | ! |
|---|
| 1022 | !-- Multiplication with wall_adjustment_factor |
|---|
| 1023 | l_wall = wall_adjustment_factor * l_wall |
|---|
| 1024 | |
|---|
| 1025 | ! |
|---|
| 1026 | !-- Need to set lateral boundary conditions for l_wall |
|---|
| 1027 | CALL exchange_horiz( l_wall ) |
|---|
| 1028 | |
|---|
| 1029 | DEALLOCATE( corner_nl, corner_nr, corner_sl, corner_sr, nzb_local, & |
|---|
| 1030 | nzb_tmp, vertical_influence, wall_l, wall_n, wall_r, wall_s ) |
|---|
| 1031 | |
|---|
| 1032 | |
|---|
| 1033 | END SUBROUTINE init_grid |
|---|
