| 1 | SUBROUTINE init_grid |
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| 2 | |
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| 3 | !------------------------------------------------------------------------------! |
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| 4 | ! Current 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 760 2011-09-15 14:37:54Z heinze $ |
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| 11 | ! |
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| 12 | ! 759 2011-09-15 13:58:31Z raasch |
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| 13 | ! Splitting of parallel I/O in blocks of PEs |
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| 14 | ! |
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| 15 | ! 722 2011-04-11 06:21:09Z raasch |
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| 16 | ! Bugfix: bc_lr/ns_cyc replaced by bc_lr/ns, because variables are not yet set |
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| 17 | ! here |
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| 18 | ! |
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| 19 | ! 709 2011-03-30 09:31:40Z raasch |
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| 20 | ! formatting adjustments |
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| 21 | ! |
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| 22 | ! 707 2011-03-29 11:39:40Z raasch |
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| 23 | ! bc_lr/ns replaced by bc_lr/ns_cyc |
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| 24 | ! |
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| 25 | ! 667 2010-12-23 12:06:00Z suehring/gryschka |
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| 26 | ! Definition of new array bounds nxlg, nxrg, nysg, nyng on each PE. |
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| 27 | ! Furthermore the allocation of arrays and steering of loops is done with these |
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| 28 | ! parameters. Call of exchange_horiz are modified. |
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| 29 | ! In case of dirichlet bounday condition at the bottom zu(0)=0.0 |
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| 30 | ! dzu_mg has to be set explicitly for a equally spaced grid near bottom. |
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| 31 | ! ddzu_pres added to use a equally spaced grid near bottom. |
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| 32 | ! |
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| 33 | ! 555 2010-09-07 07:32:53Z raasch |
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| 34 | ! Bugfix: default setting of nzb_local for flat topographie |
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| 35 | ! |
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| 36 | ! 274 2009-03-26 15:11:21Z heinze |
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| 37 | ! Output of messages replaced by message handling routine. |
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| 38 | ! new topography case 'single_street_canyon' |
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| 39 | ! |
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| 40 | ! 217 2008-12-09 18:00:48Z letzel |
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| 41 | ! +topography_grid_convention |
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| 42 | ! |
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| 43 | ! 134 2007-11-21 07:28:38Z letzel |
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| 44 | ! Redefine initial nzb_local as the actual total size of topography (later the |
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| 45 | ! extent of topography in nzb_local is reduced by 1dx at the E topography walls |
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| 46 | ! and by 1dy at the N topography walls to form the basis for nzb_s_inner); |
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| 47 | ! for consistency redefine 'single_building' case. |
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| 48 | ! Calculation of wall flag arrays |
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| 49 | ! |
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| 50 | ! 94 2007-06-01 15:25:22Z raasch |
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| 51 | ! Grid definition for ocean version |
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| 52 | ! |
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| 53 | ! 75 2007-03-22 09:54:05Z raasch |
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| 54 | ! storage of topography height arrays zu_s_inner and zw_s_inner, |
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| 55 | ! 2nd+3rd argument removed from exchange horiz |
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| 56 | ! |
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| 57 | ! 19 2007-02-23 04:53:48Z raasch |
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| 58 | ! Setting of nzt_diff |
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| 59 | ! |
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| 60 | ! RCS Log replace by Id keyword, revision history cleaned up |
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| 61 | ! |
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| 62 | ! Revision 1.17 2006/08/22 14:00:05 raasch |
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| 63 | ! +dz_max to limit vertical stretching, |
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| 64 | ! bugfix in index array initialization for line- or point-like topography |
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| 65 | ! structures |
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| 66 | ! |
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| 67 | ! Revision 1.1 1997/08/11 06:17:45 raasch |
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| 68 | ! Initial revision (Testversion) |
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| 69 | ! |
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| 70 | ! |
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| 71 | ! Description: |
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| 72 | ! ------------ |
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| 73 | ! Creating grid depending constants |
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| 74 | !------------------------------------------------------------------------------! |
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| 75 | |
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| 76 | USE arrays_3d |
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| 77 | USE control_parameters |
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| 78 | USE grid_variables |
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| 79 | USE indices |
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| 80 | USE pegrid |
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| 81 | |
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| 82 | IMPLICIT NONE |
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| 83 | |
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| 84 | INTEGER :: bh, blx, bly, bxl, bxr, byn, bys, ch, cwx, cwy, cxl, cxr, cyn, & |
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| 85 | cys, gls, i, ii, inc, i_center, j, j_center, k, l, nxl_l, & |
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| 86 | nxr_l, nyn_l, nys_l, nzb_si, nzt_l, vi |
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| 87 | |
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| 88 | INTEGER, DIMENSION(:), ALLOCATABLE :: vertical_influence |
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| 89 | |
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| 90 | INTEGER, DIMENSION(:,:), ALLOCATABLE :: corner_nl, corner_nr, corner_sl, & |
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| 91 | corner_sr, wall_l, wall_n, wall_r,& |
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| 92 | wall_s, nzb_local, nzb_tmp |
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| 93 | |
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| 94 | REAL :: dx_l, dy_l, dz_stretched |
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| 95 | |
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| 96 | REAL, DIMENSION(0:ny,0:nx) :: topo_height |
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| 97 | |
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| 98 | REAL, DIMENSION(:,:,:), ALLOCATABLE :: distance |
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| 99 | |
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| 100 | ! |
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| 101 | !-- Calculation of horizontal array bounds including ghost layers |
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| 102 | nxlg = nxl - nbgp |
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| 103 | nxrg = nxr + nbgp |
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| 104 | nysg = nys - nbgp |
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| 105 | nyng = nyn + nbgp |
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| 106 | |
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| 107 | ! |
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| 108 | !-- Allocate grid arrays |
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| 109 | ALLOCATE( ddzu(1:nzt+1), ddzw(1:nzt+1), dd2zu(1:nzt), dzu(1:nzt+1), & |
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| 110 | dzw(1:nzt+1), l_grid(1:nzt), zu(nzb:nzt+1), zw(nzb:nzt+1) ) |
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| 111 | |
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| 112 | ! |
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| 113 | !-- Compute height of u-levels from constant grid length and dz stretch factors |
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| 114 | IF ( dz == -1.0 ) THEN |
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| 115 | message_string = 'missing dz' |
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| 116 | CALL message( 'init_grid', 'PA0200', 1, 2, 0, 6, 0 ) |
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| 117 | ELSEIF ( dz <= 0.0 ) THEN |
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| 118 | WRITE( message_string, * ) 'dz=',dz,' <= 0.0' |
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| 119 | CALL message( 'init_grid', 'PA0201', 1, 2, 0, 6, 0 ) |
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| 120 | ENDIF |
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| 121 | |
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| 122 | ! |
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| 123 | !-- Define the vertical grid levels |
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| 124 | IF ( .NOT. ocean ) THEN |
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| 125 | ! |
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| 126 | !-- Grid for atmosphere with surface at z=0 (k=0, w-grid). |
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| 127 | !-- The first u-level above the surface corresponds to the top of the |
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| 128 | !-- Prandtl-layer. |
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| 129 | |
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| 130 | IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2 ) THEN |
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| 131 | zu(0) = 0.0 |
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| 132 | ! zu(0) = - dz * 0.5 |
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| 133 | ELSE |
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| 134 | zu(0) = - dz * 0.5 |
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| 135 | ENDIF |
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| 136 | zu(1) = dz * 0.5 |
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| 137 | |
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| 138 | dz_stretch_level_index = nzt+1 |
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| 139 | dz_stretched = dz |
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| 140 | DO k = 2, nzt+1 |
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| 141 | IF ( dz_stretch_level <= zu(k-1) .AND. dz_stretched < dz_max ) THEN |
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| 142 | dz_stretched = dz_stretched * dz_stretch_factor |
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| 143 | dz_stretched = MIN( dz_stretched, dz_max ) |
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| 144 | IF ( dz_stretch_level_index == nzt+1 ) dz_stretch_level_index = k-1 |
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| 145 | ENDIF |
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| 146 | zu(k) = zu(k-1) + dz_stretched |
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| 147 | ENDDO |
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| 148 | |
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| 149 | ! |
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| 150 | !-- Compute the w-levels. They are always staggered half-way between the |
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| 151 | !-- corresponding u-levels. The top w-level is extrapolated linearly. |
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| 152 | zw(0) = 0.0 |
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| 153 | DO k = 1, nzt |
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| 154 | zw(k) = ( zu(k) + zu(k+1) ) * 0.5 |
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| 155 | ENDDO |
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| 156 | zw(nzt+1) = zw(nzt) + 2.0 * ( zu(nzt+1) - zw(nzt) ) |
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| 157 | |
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| 158 | ELSE |
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| 159 | ! |
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| 160 | !-- Grid for ocean with solid surface at z=0 (k=0, w-grid). The free water |
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| 161 | !-- surface is at k=nzt (w-grid). |
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| 162 | !-- Since the w-level lies always on the surface, the first/last u-level |
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| 163 | !-- (staggered!) lies below the bottom surface / above the free surface. |
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| 164 | !-- It is used for "mirror" boundary condition. |
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| 165 | !-- The first u-level above the bottom surface corresponds to the top of the |
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| 166 | !-- Prandtl-layer. |
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| 167 | zu(nzt+1) = dz * 0.5 |
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| 168 | zu(nzt) = - dz * 0.5 |
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| 169 | |
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| 170 | dz_stretch_level_index = 0 |
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| 171 | dz_stretched = dz |
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| 172 | DO k = nzt-1, 0, -1 |
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| 173 | IF ( dz_stretch_level <= ABS( zu(k+1) ) .AND. & |
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| 174 | dz_stretched < dz_max ) THEN |
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| 175 | dz_stretched = dz_stretched * dz_stretch_factor |
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| 176 | dz_stretched = MIN( dz_stretched, dz_max ) |
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| 177 | IF ( dz_stretch_level_index == 0 ) dz_stretch_level_index = k+1 |
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| 178 | ENDIF |
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| 179 | zu(k) = zu(k+1) - dz_stretched |
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| 180 | ENDDO |
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| 181 | |
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| 182 | ! |
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| 183 | !-- Compute the w-levels. They are always staggered half-way between the |
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| 184 | !-- corresponding u-levels. |
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| 185 | !-- The top w-level (nzt+1) is not used but set for consistency, since |
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| 186 | !-- w and all scalar variables are defined up tp nzt+1. |
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| 187 | zw(nzt+1) = dz |
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| 188 | zw(nzt) = 0.0 |
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| 189 | DO k = 0, nzt |
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| 190 | zw(k) = ( zu(k) + zu(k+1) ) * 0.5 |
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| 191 | ENDDO |
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| 192 | |
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| 193 | ENDIF |
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| 194 | |
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| 195 | ! |
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| 196 | !-- Compute grid lengths. |
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| 197 | DO k = 1, nzt+1 |
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| 198 | dzu(k) = zu(k) - zu(k-1) |
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| 199 | ddzu(k) = 1.0 / dzu(k) |
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| 200 | dzw(k) = zw(k) - zw(k-1) |
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| 201 | ddzw(k) = 1.0 / dzw(k) |
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| 202 | ENDDO |
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| 203 | |
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| 204 | DO k = 1, nzt |
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| 205 | dd2zu(k) = 1.0 / ( dzu(k) + dzu(k+1) ) |
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| 206 | ENDDO |
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| 207 | |
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| 208 | ! |
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| 209 | !-- The FFT- SOR-pressure solvers assume grid spacings of a staggered grid |
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| 210 | !-- everywhere. For the actual grid, the grid spacing at the lowest level |
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| 211 | !-- is only dz/2, but should be dz. Therefore, an additional array |
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| 212 | !-- containing with appropriate grid information is created for these |
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| 213 | !-- solvers. |
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| 214 | IF ( psolver /= 'multigrid' ) THEN |
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| 215 | ALLOCATE( ddzu_pres(1:nzt+1) ) |
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| 216 | ddzu_pres = ddzu |
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| 217 | IF( .NOT. ocean ) ddzu_pres(1) = ddzu_pres(2) ! change for lowest level |
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| 218 | ENDIF |
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| 219 | |
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| 220 | ! |
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| 221 | !-- In case of multigrid method, compute grid lengths and grid factors for the |
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| 222 | !-- grid levels |
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| 223 | IF ( psolver == 'multigrid' ) THEN |
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| 224 | |
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| 225 | ALLOCATE( ddx2_mg(maximum_grid_level), ddy2_mg(maximum_grid_level), & |
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| 226 | dzu_mg(nzb+1:nzt+1,maximum_grid_level), & |
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| 227 | dzw_mg(nzb+1:nzt+1,maximum_grid_level), & |
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| 228 | f1_mg(nzb+1:nzt,maximum_grid_level), & |
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| 229 | f2_mg(nzb+1:nzt,maximum_grid_level), & |
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| 230 | f3_mg(nzb+1:nzt,maximum_grid_level) ) |
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| 231 | |
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| 232 | dzu_mg(:,maximum_grid_level) = dzu |
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| 233 | ! |
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| 234 | !-- Next line to ensure an equally spaced grid. For ocean runs this is not |
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| 235 | !-- necessary, |
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| 236 | !-- because zu(0) does not changed so far. Also this would cause errors |
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| 237 | !-- if a vertical stretching for ocean runs is used. |
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| 238 | IF ( .NOT. ocean ) dzu_mg(1,maximum_grid_level) = dzu(2) |
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| 239 | |
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| 240 | dzw_mg(:,maximum_grid_level) = dzw |
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| 241 | nzt_l = nzt |
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| 242 | DO l = maximum_grid_level-1, 1, -1 |
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| 243 | dzu_mg(nzb+1,l) = 2.0 * dzu_mg(nzb+1,l+1) |
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| 244 | dzw_mg(nzb+1,l) = 2.0 * dzw_mg(nzb+1,l+1) |
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| 245 | nzt_l = nzt_l / 2 |
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| 246 | DO k = 2, nzt_l+1 |
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| 247 | dzu_mg(k,l) = dzu_mg(2*k-2,l+1) + dzu_mg(2*k-1,l+1) |
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| 248 | dzw_mg(k,l) = dzw_mg(2*k-2,l+1) + dzw_mg(2*k-1,l+1) |
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| 249 | ENDDO |
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| 250 | ENDDO |
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| 251 | |
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| 252 | nzt_l = nzt |
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| 253 | dx_l = dx |
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| 254 | dy_l = dy |
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| 255 | DO l = maximum_grid_level, 1, -1 |
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| 256 | ddx2_mg(l) = 1.0 / dx_l**2 |
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| 257 | ddy2_mg(l) = 1.0 / dy_l**2 |
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| 258 | DO k = nzb+1, nzt_l |
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| 259 | f2_mg(k,l) = 1.0 / ( dzu_mg(k+1,l) * dzw_mg(k,l) ) |
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| 260 | f3_mg(k,l) = 1.0 / ( dzu_mg(k,l) * dzw_mg(k,l) ) |
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| 261 | f1_mg(k,l) = 2.0 * ( ddx2_mg(l) + ddy2_mg(l) ) + & |
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| 262 | f2_mg(k,l) + f3_mg(k,l) |
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| 263 | ENDDO |
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| 264 | nzt_l = nzt_l / 2 |
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| 265 | dx_l = dx_l * 2.0 |
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| 266 | dy_l = dy_l * 2.0 |
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| 267 | ENDDO |
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| 268 | |
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| 269 | ENDIF |
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| 270 | |
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| 271 | ! |
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| 272 | !-- Compute the reciprocal values of the horizontal grid lengths. |
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| 273 | ddx = 1.0 / dx |
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| 274 | ddy = 1.0 / dy |
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| 275 | dx2 = dx * dx |
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| 276 | dy2 = dy * dy |
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| 277 | ddx2 = 1.0 / dx2 |
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| 278 | ddy2 = 1.0 / dy2 |
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| 279 | |
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| 280 | ! |
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| 281 | !-- Compute the grid-dependent mixing length. |
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| 282 | DO k = 1, nzt |
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| 283 | l_grid(k) = ( dx * dy * dzw(k) )**0.33333333333333 |
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| 284 | ENDDO |
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| 285 | |
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| 286 | ! |
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| 287 | !-- Allocate outer and inner index arrays for topography and set |
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| 288 | !-- defaults. |
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| 289 | !-- nzb_local has to contain additional layers of ghost points for calculating |
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| 290 | !-- the flag arrays needed for the multigrid method |
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| 291 | gls = 2**( maximum_grid_level ) |
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| 292 | |
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| 293 | ALLOCATE( corner_nl(nys:nyn,nxl:nxr), corner_nr(nys:nyn,nxl:nxr), & |
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| 294 | corner_sl(nys:nyn,nxl:nxr), corner_sr(nys:nyn,nxl:nxr), & |
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| 295 | nzb_local(-gls:ny+gls,-gls:nx+gls), & |
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| 296 | nzb_tmp(-nbgp:ny+nbgp,-nbgp:nx+nbgp), & |
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| 297 | wall_l(nys:nyn,nxl:nxr), wall_n(nys:nyn,nxl:nxr), & |
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| 298 | wall_r(nys:nyn,nxl:nxr), wall_s(nys:nyn,nxl:nxr) ) |
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| 299 | ALLOCATE( fwxm(nysg:nyng,nxlg:nxrg), fwxp(nysg:nyng,nxlg:nxrg), & |
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| 300 | fwym(nysg:nyng,nxlg:nxrg), fwyp(nysg:nyng,nxlg:nxrg), & |
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| 301 | fxm(nysg:nyng,nxlg:nxrg), fxp(nysg:nyng,nxlg:nxrg), & |
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| 302 | fym(nysg:nyng,nxlg:nxrg), fyp(nysg:nyng,nxlg:nxrg), & |
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| 303 | nzb_s_inner(nysg:nyng,nxlg:nxrg), & |
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| 304 | nzb_s_outer(nysg:nyng,nxlg:nxrg), & |
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| 305 | nzb_u_inner(nysg:nyng,nxlg:nxrg), & |
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| 306 | nzb_u_outer(nysg:nyng,nxlg:nxrg), & |
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| 307 | nzb_v_inner(nysg:nyng,nxlg:nxrg), & |
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| 308 | nzb_v_outer(nysg:nyng,nxlg:nxrg), & |
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| 309 | nzb_w_inner(nysg:nyng,nxlg:nxrg), & |
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| 310 | nzb_w_outer(nysg:nyng,nxlg:nxrg), & |
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| 311 | nzb_diff_s_inner(nysg:nyng,nxlg:nxrg), & |
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| 312 | nzb_diff_s_outer(nysg:nyng,nxlg:nxrg), & |
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| 313 | nzb_diff_u(nysg:nyng,nxlg:nxrg), & |
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| 314 | nzb_diff_v(nysg:nyng,nxlg:nxrg), & |
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| 315 | nzb_2d(nysg:nyng,nxlg:nxrg), & |
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| 316 | wall_e_x(nysg:nyng,nxlg:nxrg), & |
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| 317 | wall_e_y(nysg:nyng,nxlg:nxrg), & |
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| 318 | wall_u(nysg:nyng,nxlg:nxrg), & |
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| 319 | wall_v(nysg:nyng,nxlg:nxrg), & |
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| 320 | wall_w_x(nysg:nyng,nxlg:nxrg), & |
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| 321 | wall_w_y(nysg:nyng,nxlg:nxrg) ) |
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| 322 | |
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| 323 | |
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| 324 | |
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| 325 | ALLOCATE( l_wall(nzb:nzt+1,nysg:nyng,nxlg:nxrg) ) |
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| 326 | |
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| 327 | nzb_s_inner = nzb; nzb_s_outer = nzb |
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| 328 | nzb_u_inner = nzb; nzb_u_outer = nzb |
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| 329 | nzb_v_inner = nzb; nzb_v_outer = nzb |
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| 330 | nzb_w_inner = nzb; nzb_w_outer = nzb |
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| 331 | |
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| 332 | ! |
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| 333 | !-- Define vertical gridpoint from (or to) which on the usual finite difference |
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| 334 | !-- form (which does not use surface fluxes) is applied |
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| 335 | IF ( prandtl_layer .OR. use_surface_fluxes ) THEN |
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| 336 | nzb_diff = nzb + 2 |
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| 337 | ELSE |
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| 338 | nzb_diff = nzb + 1 |
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| 339 | ENDIF |
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| 340 | IF ( use_top_fluxes ) THEN |
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| 341 | nzt_diff = nzt - 1 |
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| 342 | ELSE |
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| 343 | nzt_diff = nzt |
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| 344 | ENDIF |
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| 345 | |
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| 346 | nzb_diff_s_inner = nzb_diff; nzb_diff_s_outer = nzb_diff |
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| 347 | nzb_diff_u = nzb_diff; nzb_diff_v = nzb_diff |
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| 348 | |
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| 349 | wall_e_x = 0.0; wall_e_y = 0.0; wall_u = 0.0; wall_v = 0.0 |
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| 350 | wall_w_x = 0.0; wall_w_y = 0.0 |
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| 351 | fwxp = 1.0; fwxm = 1.0; fwyp = 1.0; fwym = 1.0 |
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| 352 | fxp = 1.0; fxm = 1.0; fyp = 1.0; fym = 1.0 |
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| 353 | |
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| 354 | ! |
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| 355 | !-- Initialize near-wall mixing length l_wall only in the vertical direction |
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| 356 | !-- for the moment, |
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| 357 | !-- multiplication with wall_adjustment_factor near the end of this routine |
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| 358 | l_wall(nzb,:,:) = l_grid(1) |
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| 359 | DO k = nzb+1, nzt |
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| 360 | l_wall(k,:,:) = l_grid(k) |
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| 361 | ENDDO |
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| 362 | l_wall(nzt+1,:,:) = l_grid(nzt) |
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| 363 | |
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| 364 | ALLOCATE ( vertical_influence(nzb:nzt) ) |
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| 365 | DO k = 1, nzt |
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| 366 | vertical_influence(k) = MIN ( INT( l_grid(k) / & |
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| 367 | ( wall_adjustment_factor * dzw(k) ) + 0.5 ), nzt - k ) |
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| 368 | ENDDO |
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| 369 | |
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| 370 | DO k = 1, MAXVAL( nzb_s_inner ) |
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| 371 | IF ( l_grid(k) > 1.5 * dx * wall_adjustment_factor .OR. & |
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| 372 | l_grid(k) > 1.5 * dy * wall_adjustment_factor ) THEN |
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| 373 | WRITE( message_string, * ) 'grid anisotropy exceeds ', & |
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| 374 | 'threshold given by only local', & |
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| 375 | ' &horizontal reduction of near_wall ', & |
|---|
| 376 | 'mixing length l_wall', & |
|---|
| 377 | ' &starting from height level k = ', k, '.' |
|---|
| 378 | CALL message( 'init_grid', 'PA0202', 0, 1, 0, 6, 0 ) |
|---|
| 379 | EXIT |
|---|
| 380 | ENDIF |
|---|
| 381 | ENDDO |
|---|
| 382 | vertical_influence(0) = vertical_influence(1) |
|---|
| 383 | |
|---|
| 384 | DO i = nxlg, nxrg |
|---|
| 385 | DO j = nysg, nyng |
|---|
| 386 | DO k = nzb_s_inner(j,i) + 1, & |
|---|
| 387 | nzb_s_inner(j,i) + vertical_influence(nzb_s_inner(j,i)) |
|---|
| 388 | l_wall(k,j,i) = zu(k) - zw(nzb_s_inner(j,i)) |
|---|
| 389 | ENDDO |
|---|
| 390 | ENDDO |
|---|
| 391 | ENDDO |
|---|
| 392 | |
|---|
| 393 | ! |
|---|
| 394 | !-- Set outer and inner index arrays for non-flat topography. |
|---|
| 395 | !-- Here consistency checks concerning domain size and periodicity are |
|---|
| 396 | !-- necessary. |
|---|
| 397 | !-- Within this SELECT CASE structure only nzb_local is initialized |
|---|
| 398 | !-- individually depending on the chosen topography type, all other index |
|---|
| 399 | !-- arrays are initialized further below. |
|---|
| 400 | SELECT CASE ( TRIM( topography ) ) |
|---|
| 401 | |
|---|
| 402 | CASE ( 'flat' ) |
|---|
| 403 | ! |
|---|
| 404 | !-- nzb_local is required for the multigrid solver |
|---|
| 405 | nzb_local = 0 |
|---|
| 406 | |
|---|
| 407 | CASE ( 'single_building' ) |
|---|
| 408 | ! |
|---|
| 409 | !-- Single rectangular building, by default centered in the middle of the |
|---|
| 410 | !-- total domain |
|---|
| 411 | blx = NINT( building_length_x / dx ) |
|---|
| 412 | bly = NINT( building_length_y / dy ) |
|---|
| 413 | bh = NINT( building_height / dz ) |
|---|
| 414 | |
|---|
| 415 | IF ( building_wall_left == 9999999.9 ) THEN |
|---|
| 416 | building_wall_left = ( nx + 1 - blx ) / 2 * dx |
|---|
| 417 | ENDIF |
|---|
| 418 | bxl = NINT( building_wall_left / dx ) |
|---|
| 419 | bxr = bxl + blx |
|---|
| 420 | |
|---|
| 421 | IF ( building_wall_south == 9999999.9 ) THEN |
|---|
| 422 | building_wall_south = ( ny + 1 - bly ) / 2 * dy |
|---|
| 423 | ENDIF |
|---|
| 424 | bys = NINT( building_wall_south / dy ) |
|---|
| 425 | byn = bys + bly |
|---|
| 426 | |
|---|
| 427 | ! |
|---|
| 428 | !-- Building size has to meet some requirements |
|---|
| 429 | IF ( ( bxl < 1 ) .OR. ( bxr > nx-1 ) .OR. ( bxr < bxl+3 ) .OR. & |
|---|
| 430 | ( bys < 1 ) .OR. ( byn > ny-1 ) .OR. ( byn < bys+3 ) ) THEN |
|---|
| 431 | WRITE( message_string, * ) 'inconsistent building parameters:', & |
|---|
| 432 | '& bxl=', bxl, 'bxr=', bxr, 'bys=', bys, & |
|---|
| 433 | 'byn=', byn, 'nx=', nx, 'ny=', ny |
|---|
| 434 | CALL message( 'init_grid', 'PA0203', 1, 2, 0, 6, 0 ) |
|---|
| 435 | ENDIF |
|---|
| 436 | |
|---|
| 437 | ! |
|---|
| 438 | !-- Define the building. |
|---|
| 439 | nzb_local = 0 |
|---|
| 440 | nzb_local(bys:byn,bxl:bxr) = bh |
|---|
| 441 | |
|---|
| 442 | CASE ( 'single_street_canyon' ) |
|---|
| 443 | ! |
|---|
| 444 | !-- Single quasi-2D street canyon of infinite length in x or y direction. |
|---|
| 445 | !-- The canyon is centered in the other direction by default. |
|---|
| 446 | IF ( canyon_width_x /= 9999999.9 ) THEN |
|---|
| 447 | ! |
|---|
| 448 | !-- Street canyon in y direction |
|---|
| 449 | cwx = NINT( canyon_width_x / dx ) |
|---|
| 450 | IF ( canyon_wall_left == 9999999.9 ) THEN |
|---|
| 451 | canyon_wall_left = ( nx + 1 - cwx ) / 2 * dx |
|---|
| 452 | ENDIF |
|---|
| 453 | cxl = NINT( canyon_wall_left / dx ) |
|---|
| 454 | cxr = cxl + cwx |
|---|
| 455 | |
|---|
| 456 | ELSEIF ( canyon_width_y /= 9999999.9 ) THEN |
|---|
| 457 | ! |
|---|
| 458 | !-- Street canyon in x direction |
|---|
| 459 | cwy = NINT( canyon_width_y / dy ) |
|---|
| 460 | IF ( canyon_wall_south == 9999999.9 ) THEN |
|---|
| 461 | canyon_wall_south = ( ny + 1 - cwy ) / 2 * dy |
|---|
| 462 | ENDIF |
|---|
| 463 | cys = NINT( canyon_wall_south / dy ) |
|---|
| 464 | cyn = cys + cwy |
|---|
| 465 | |
|---|
| 466 | ELSE |
|---|
| 467 | |
|---|
| 468 | message_string = 'no street canyon width given' |
|---|
| 469 | CALL message( 'init_grid', 'PA0204', 1, 2, 0, 6, 0 ) |
|---|
| 470 | |
|---|
| 471 | ENDIF |
|---|
| 472 | |
|---|
| 473 | ch = NINT( canyon_height / dz ) |
|---|
| 474 | dp_level_ind_b = ch |
|---|
| 475 | ! |
|---|
| 476 | !-- Street canyon size has to meet some requirements |
|---|
| 477 | IF ( canyon_width_x /= 9999999.9 ) THEN |
|---|
| 478 | IF ( ( cxl < 1 ) .OR. ( cxr > nx-1 ) .OR. ( cwx < 3 ) .OR. & |
|---|
| 479 | ( ch < 3 ) ) THEN |
|---|
| 480 | WRITE( message_string, * ) 'inconsistent canyon parameters:', & |
|---|
| 481 | '&cxl=', cxl, 'cxr=', cxr, & |
|---|
| 482 | 'cwx=', cwx, & |
|---|
| 483 | 'ch=', ch, 'nx=', nx, 'ny=', ny |
|---|
| 484 | CALL message( 'init_grid', 'PA0205', 1, 2, 0, 6, 0 ) |
|---|
| 485 | ENDIF |
|---|
| 486 | ELSEIF ( canyon_width_y /= 9999999.9 ) THEN |
|---|
| 487 | IF ( ( cys < 1 ) .OR. ( cyn > ny-1 ) .OR. ( cwy < 3 ) .OR. & |
|---|
| 488 | ( ch < 3 ) ) THEN |
|---|
| 489 | WRITE( message_string, * ) 'inconsistent canyon parameters:', & |
|---|
| 490 | '&cys=', cys, 'cyn=', cyn, & |
|---|
| 491 | 'cwy=', cwy, & |
|---|
| 492 | 'ch=', ch, 'nx=', nx, 'ny=', ny |
|---|
| 493 | CALL message( 'init_grid', 'PA0206', 1, 2, 0, 6, 0 ) |
|---|
| 494 | ENDIF |
|---|
| 495 | ENDIF |
|---|
| 496 | IF ( canyon_width_x /= 9999999.9 .AND. canyon_width_y /= 9999999.9 ) & |
|---|
| 497 | THEN |
|---|
| 498 | message_string = 'inconsistent canyon parameters:' // & |
|---|
| 499 | '&street canyon can only be oriented' // & |
|---|
| 500 | '&either in x- or in y-direction' |
|---|
| 501 | CALL message( 'init_grid', 'PA0207', 1, 2, 0, 6, 0 ) |
|---|
| 502 | ENDIF |
|---|
| 503 | |
|---|
| 504 | nzb_local = ch |
|---|
| 505 | IF ( canyon_width_x /= 9999999.9 ) THEN |
|---|
| 506 | nzb_local(:,cxl+1:cxr-1) = 0 |
|---|
| 507 | ELSEIF ( canyon_width_y /= 9999999.9 ) THEN |
|---|
| 508 | nzb_local(cys+1:cyn-1,:) = 0 |
|---|
| 509 | ENDIF |
|---|
| 510 | |
|---|
| 511 | CASE ( 'read_from_file' ) |
|---|
| 512 | |
|---|
| 513 | DO ii = 0, io_blocks-1 |
|---|
| 514 | IF ( ii == io_group ) THEN |
|---|
| 515 | |
|---|
| 516 | ! |
|---|
| 517 | !-- Arbitrary irregular topography data in PALM format (exactly |
|---|
| 518 | !-- matching the grid size and total domain size) |
|---|
| 519 | OPEN( 90, FILE='TOPOGRAPHY_DATA', STATUS='OLD', & |
|---|
| 520 | FORM='FORMATTED', ERR=10 ) |
|---|
| 521 | DO j = ny, 0, -1 |
|---|
| 522 | READ( 90, *, ERR=11, END=11 ) ( topo_height(j,i), i = 0,nx ) |
|---|
| 523 | ENDDO |
|---|
| 524 | |
|---|
| 525 | GOTO 12 |
|---|
| 526 | |
|---|
| 527 | 10 message_string = 'file TOPOGRAPHY_DATA does not exist' |
|---|
| 528 | CALL message( 'init_grid', 'PA0208', 1, 2, 0, 6, 0 ) |
|---|
| 529 | |
|---|
| 530 | 11 message_string = 'errors in file TOPOGRAPHY_DATA' |
|---|
| 531 | CALL message( 'init_grid', 'PA0209', 1, 2, 0, 6, 0 ) |
|---|
| 532 | |
|---|
| 533 | 12 CLOSE( 90 ) |
|---|
| 534 | |
|---|
| 535 | ENDIF |
|---|
| 536 | #if defined( __parallel ) |
|---|
| 537 | CALL MPI_BARRIER( comm2d, ierr ) |
|---|
| 538 | #endif |
|---|
| 539 | ENDDO |
|---|
| 540 | |
|---|
| 541 | ! |
|---|
| 542 | !-- Calculate the index height of the topography |
|---|
| 543 | DO i = 0, nx |
|---|
| 544 | DO j = 0, ny |
|---|
| 545 | nzb_local(j,i) = NINT( topo_height(j,i) / dz ) |
|---|
| 546 | ENDDO |
|---|
| 547 | ENDDO |
|---|
| 548 | ! |
|---|
| 549 | !-- Add cyclic boundaries (additional layers are for calculating |
|---|
| 550 | !-- flag arrays needed for the multigrid sover) |
|---|
| 551 | nzb_local(-gls:-1,0:nx) = nzb_local(ny-gls+1:ny,0:nx) |
|---|
| 552 | nzb_local(ny+1:ny+gls,0:nx) = nzb_local(0:gls-1,0:nx) |
|---|
| 553 | nzb_local(:,-gls:-1) = nzb_local(:,nx-gls+1:nx) |
|---|
| 554 | nzb_local(:,nx+1:nx+gls) = nzb_local(:,0:gls-1) |
|---|
| 555 | |
|---|
| 556 | CASE DEFAULT |
|---|
| 557 | ! |
|---|
| 558 | !-- The DEFAULT case is reached either if the parameter topography |
|---|
| 559 | !-- contains a wrong character string or if the user has defined a special |
|---|
| 560 | !-- case in the user interface. There, the subroutine user_init_grid |
|---|
| 561 | !-- checks which of these two conditions applies. |
|---|
| 562 | CALL user_init_grid( gls, nzb_local ) |
|---|
| 563 | |
|---|
| 564 | END SELECT |
|---|
| 565 | |
|---|
| 566 | ! |
|---|
| 567 | !-- Consistency checks and index array initialization are only required for |
|---|
| 568 | !-- non-flat topography, also the initialization of topography height arrays |
|---|
| 569 | !-- zu_s_inner and zw_w_inner |
|---|
| 570 | IF ( TRIM( topography ) /= 'flat' ) THEN |
|---|
| 571 | |
|---|
| 572 | ! |
|---|
| 573 | !-- Consistency checks |
|---|
| 574 | IF ( MINVAL( nzb_local ) < 0 .OR. MAXVAL( nzb_local ) > nz + 1 ) THEN |
|---|
| 575 | WRITE( message_string, * ) 'nzb_local values are outside the', & |
|---|
| 576 | 'model domain', & |
|---|
| 577 | '&MINVAL( nzb_local ) = ', MINVAL(nzb_local), & |
|---|
| 578 | '&MAXVAL( nzb_local ) = ', MAXVAL(nzb_local) |
|---|
| 579 | CALL message( 'init_grid', 'PA0210', 1, 2, 0, 6, 0 ) |
|---|
| 580 | ENDIF |
|---|
| 581 | |
|---|
| 582 | IF ( bc_lr == 'cyclic' ) THEN |
|---|
| 583 | IF ( ANY( nzb_local(:,-1) /= nzb_local(:,nx) ) .OR. & |
|---|
| 584 | ANY( nzb_local(:,0) /= nzb_local(:,nx+1) ) ) THEN |
|---|
| 585 | message_string = 'nzb_local does not fulfill cyclic' // & |
|---|
| 586 | ' boundary condition in x-direction' |
|---|
| 587 | CALL message( 'init_grid', 'PA0211', 1, 2, 0, 6, 0 ) |
|---|
| 588 | ENDIF |
|---|
| 589 | ENDIF |
|---|
| 590 | IF ( bc_ns == 'cyclic' ) THEN |
|---|
| 591 | IF ( ANY( nzb_local(-1,:) /= nzb_local(ny,:) ) .OR. & |
|---|
| 592 | ANY( nzb_local(0,:) /= nzb_local(ny+1,:) ) ) THEN |
|---|
| 593 | message_string = 'nzb_local does not fulfill cyclic' // & |
|---|
| 594 | ' boundary condition in y-direction' |
|---|
| 595 | CALL message( 'init_grid', 'PA0212', 1, 2, 0, 6, 0 ) |
|---|
| 596 | ENDIF |
|---|
| 597 | ENDIF |
|---|
| 598 | |
|---|
| 599 | IF ( topography_grid_convention == 'cell_edge' ) THEN |
|---|
| 600 | ! |
|---|
| 601 | !-- The array nzb_local as defined using the 'cell_edge' convention |
|---|
| 602 | !-- describes the actual total size of topography which is defined at the |
|---|
| 603 | !-- cell edges where u=0 on the topography walls in x-direction and v=0 |
|---|
| 604 | !-- on the topography walls in y-direction. However, PALM uses individual |
|---|
| 605 | !-- arrays nzb_u|v|w|s_inner|outer that are based on nzb_s_inner. |
|---|
| 606 | !-- Therefore, the extent of topography in nzb_local is now reduced by |
|---|
| 607 | !-- 1dx at the E topography walls and by 1dy at the N topography walls |
|---|
| 608 | !-- to form the basis for nzb_s_inner. |
|---|
| 609 | DO j = -gls, ny + gls |
|---|
| 610 | DO i = -gls, nx |
|---|
| 611 | nzb_local(j,i) = MIN( nzb_local(j,i), nzb_local(j,i+1) ) |
|---|
| 612 | ENDDO |
|---|
| 613 | ENDDO |
|---|
| 614 | !-- apply cyclic boundary conditions in x-direction |
|---|
| 615 | !(ist das erforderlich? Ursache von Seung Bus Fehler?) |
|---|
| 616 | nzb_local(:,nx+1:nx+gls) = nzb_local(:,0:gls-1) |
|---|
| 617 | DO i = -gls, nx + gls |
|---|
| 618 | DO j = -gls, ny |
|---|
| 619 | nzb_local(j,i) = MIN( nzb_local(j,i), nzb_local(j+1,i) ) |
|---|
| 620 | ENDDO |
|---|
| 621 | ENDDO |
|---|
| 622 | !-- apply cyclic boundary conditions in y-direction |
|---|
| 623 | !(ist das erforderlich? Ursache von Seung Bus Fehler?) |
|---|
| 624 | nzb_local(ny+1:ny+gls,:) = nzb_local(0:gls-1,:) |
|---|
| 625 | ENDIF |
|---|
| 626 | |
|---|
| 627 | ! |
|---|
| 628 | !-- Initialize index arrays nzb_s_inner and nzb_w_inner |
|---|
| 629 | nzb_s_inner = nzb_local(nys-1:nyn+1,nxl-1:nxr+1) |
|---|
| 630 | nzb_w_inner = nzb_local(nys-1:nyn+1,nxl-1:nxr+1) |
|---|
| 631 | |
|---|
| 632 | ! |
|---|
| 633 | !-- Initialize remaining index arrays: |
|---|
| 634 | !-- first pre-initialize them with nzb_s_inner... |
|---|
| 635 | nzb_u_inner = nzb_s_inner |
|---|
| 636 | nzb_u_outer = nzb_s_inner |
|---|
| 637 | nzb_v_inner = nzb_s_inner |
|---|
| 638 | nzb_v_outer = nzb_s_inner |
|---|
| 639 | nzb_w_outer = nzb_s_inner |
|---|
| 640 | nzb_s_outer = nzb_s_inner |
|---|
| 641 | |
|---|
| 642 | ! |
|---|
| 643 | !-- ...then extend pre-initialized arrays in their according directions |
|---|
| 644 | !-- based on nzb_local using nzb_tmp as a temporary global index array |
|---|
| 645 | |
|---|
| 646 | ! |
|---|
| 647 | !-- nzb_s_outer: |
|---|
| 648 | !-- extend nzb_local east-/westwards first, then north-/southwards |
|---|
| 649 | nzb_tmp = nzb_local(-nbgp:ny+nbgp,-nbgp:nx+nbgp) |
|---|
| 650 | DO j = -1, ny + 1 |
|---|
| 651 | DO i = 0, nx |
|---|
| 652 | nzb_tmp(j,i) = MAX( nzb_local(j,i-1), nzb_local(j,i), & |
|---|
| 653 | nzb_local(j,i+1) ) |
|---|
| 654 | ENDDO |
|---|
| 655 | ENDDO |
|---|
| 656 | DO i = nxl, nxr |
|---|
| 657 | DO j = nys, nyn |
|---|
| 658 | nzb_s_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i), & |
|---|
| 659 | nzb_tmp(j+1,i) ) |
|---|
| 660 | ENDDO |
|---|
| 661 | ! |
|---|
| 662 | !-- non-cyclic boundary conditions (overwritten by call of |
|---|
| 663 | !-- exchange_horiz_2d_int below in case of cyclic boundary conditions) |
|---|
| 664 | IF ( nys == 0 ) THEN |
|---|
| 665 | j = -1 |
|---|
| 666 | nzb_s_outer(j,i) = MAX( nzb_tmp(j+1,i), nzb_tmp(j,i) ) |
|---|
| 667 | ENDIF |
|---|
| 668 | IF ( nys == ny ) THEN |
|---|
| 669 | j = ny + 1 |
|---|
| 670 | nzb_s_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i) ) |
|---|
| 671 | ENDIF |
|---|
| 672 | ENDDO |
|---|
| 673 | ! |
|---|
| 674 | !-- nzb_w_outer: |
|---|
| 675 | !-- identical to nzb_s_outer |
|---|
| 676 | nzb_w_outer = nzb_s_outer |
|---|
| 677 | |
|---|
| 678 | ! |
|---|
| 679 | !-- nzb_u_inner: |
|---|
| 680 | !-- extend nzb_local rightwards only |
|---|
| 681 | nzb_tmp = nzb_local(-nbgp:ny+nbgp,-nbgp:nx+nbgp) |
|---|
| 682 | DO j = -1, ny + 1 |
|---|
| 683 | DO i = 0, nx + 1 |
|---|
| 684 | nzb_tmp(j,i) = MAX( nzb_local(j,i-1), nzb_local(j,i) ) |
|---|
| 685 | ENDDO |
|---|
| 686 | ENDDO |
|---|
| 687 | nzb_u_inner = nzb_tmp(nysg:nyng,nxlg:nxrg) |
|---|
| 688 | |
|---|
| 689 | ! |
|---|
| 690 | !-- nzb_u_outer: |
|---|
| 691 | !-- extend current nzb_tmp (nzb_u_inner) north-/southwards |
|---|
| 692 | DO i = nxl, nxr |
|---|
| 693 | DO j = nys, nyn |
|---|
| 694 | nzb_u_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i), & |
|---|
| 695 | nzb_tmp(j+1,i) ) |
|---|
| 696 | ENDDO |
|---|
| 697 | ! |
|---|
| 698 | !-- non-cyclic boundary conditions (overwritten by call of |
|---|
| 699 | !-- exchange_horiz_2d_int below in case of cyclic boundary conditions) |
|---|
| 700 | IF ( nys == 0 ) THEN |
|---|
| 701 | j = -1 |
|---|
| 702 | nzb_u_outer(j,i) = MAX( nzb_tmp(j+1,i), nzb_tmp(j,i) ) |
|---|
| 703 | ENDIF |
|---|
| 704 | IF ( nys == ny ) THEN |
|---|
| 705 | j = ny + 1 |
|---|
| 706 | nzb_u_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i) ) |
|---|
| 707 | ENDIF |
|---|
| 708 | ENDDO |
|---|
| 709 | |
|---|
| 710 | ! |
|---|
| 711 | !-- nzb_v_inner: |
|---|
| 712 | !-- extend nzb_local northwards only |
|---|
| 713 | nzb_tmp = nzb_local(-nbgp:ny+nbgp,-nbgp:nx+nbgp) |
|---|
| 714 | DO i = -1, nx + 1 |
|---|
| 715 | DO j = 0, ny + 1 |
|---|
| 716 | nzb_tmp(j,i) = MAX( nzb_local(j-1,i), nzb_local(j,i) ) |
|---|
| 717 | ENDDO |
|---|
| 718 | ENDDO |
|---|
| 719 | nzb_v_inner = nzb_tmp(nys-nbgp:nyn+nbgp,nxl-nbgp:nxr+nbgp) |
|---|
| 720 | |
|---|
| 721 | ! |
|---|
| 722 | !-- nzb_v_outer: |
|---|
| 723 | !-- extend current nzb_tmp (nzb_v_inner) right-/leftwards |
|---|
| 724 | DO j = nys, nyn |
|---|
| 725 | DO i = nxl, nxr |
|---|
| 726 | nzb_v_outer(j,i) = MAX( nzb_tmp(j,i-1), nzb_tmp(j,i), & |
|---|
| 727 | nzb_tmp(j,i+1) ) |
|---|
| 728 | ENDDO |
|---|
| 729 | ! |
|---|
| 730 | !-- non-cyclic boundary conditions (overwritten by call of |
|---|
| 731 | !-- exchange_horiz_2d_int below in case of cyclic boundary conditions) |
|---|
| 732 | IF ( nxl == 0 ) THEN |
|---|
| 733 | i = -1 |
|---|
| 734 | nzb_v_outer(j,i) = MAX( nzb_tmp(j,i+1), nzb_tmp(j,i) ) |
|---|
| 735 | ENDIF |
|---|
| 736 | IF ( nxr == nx ) THEN |
|---|
| 737 | i = nx + 1 |
|---|
| 738 | nzb_v_outer(j,i) = MAX( nzb_tmp(j,i-1), nzb_tmp(j,i) ) |
|---|
| 739 | ENDIF |
|---|
| 740 | ENDDO |
|---|
| 741 | |
|---|
| 742 | ! |
|---|
| 743 | !-- Exchange of lateral boundary values (parallel computers) and cyclic |
|---|
| 744 | !-- boundary conditions, if applicable. |
|---|
| 745 | !-- Since nzb_s_inner and nzb_w_inner are derived directly from nzb_local |
|---|
| 746 | !-- they do not require exchange and are not included here. |
|---|
| 747 | CALL exchange_horiz_2d_int( nzb_u_inner ) |
|---|
| 748 | CALL exchange_horiz_2d_int( nzb_u_outer ) |
|---|
| 749 | CALL exchange_horiz_2d_int( nzb_v_inner ) |
|---|
| 750 | CALL exchange_horiz_2d_int( nzb_v_outer ) |
|---|
| 751 | CALL exchange_horiz_2d_int( nzb_w_outer ) |
|---|
| 752 | CALL exchange_horiz_2d_int( nzb_s_outer ) |
|---|
| 753 | |
|---|
| 754 | ! |
|---|
| 755 | !-- Allocate and set the arrays containing the topography height |
|---|
| 756 | IF ( myid == 0 ) THEN |
|---|
| 757 | |
|---|
| 758 | ALLOCATE( zu_s_inner(0:nx+1,0:ny+1), zw_w_inner(0:nx+1,0:ny+1) ) |
|---|
| 759 | |
|---|
| 760 | DO i = 0, nx + 1 |
|---|
| 761 | DO j = 0, ny + 1 |
|---|
| 762 | zu_s_inner(i,j) = zu(nzb_local(j,i)) |
|---|
| 763 | zw_w_inner(i,j) = zw(nzb_local(j,i)) |
|---|
| 764 | ENDDO |
|---|
| 765 | ENDDO |
|---|
| 766 | |
|---|
| 767 | ENDIF |
|---|
| 768 | |
|---|
| 769 | ENDIF |
|---|
| 770 | |
|---|
| 771 | ! |
|---|
| 772 | !-- Preliminary: to be removed after completion of the topography code! |
|---|
| 773 | !-- Set the former default k index arrays nzb_2d |
|---|
| 774 | nzb_2d = nzb |
|---|
| 775 | |
|---|
| 776 | ! |
|---|
| 777 | !-- Set the individual index arrays which define the k index from which on |
|---|
| 778 | !-- the usual finite difference form (which does not use surface fluxes) is |
|---|
| 779 | !-- applied |
|---|
| 780 | IF ( prandtl_layer .OR. use_surface_fluxes ) THEN |
|---|
| 781 | nzb_diff_u = nzb_u_inner + 2 |
|---|
| 782 | nzb_diff_v = nzb_v_inner + 2 |
|---|
| 783 | nzb_diff_s_inner = nzb_s_inner + 2 |
|---|
| 784 | nzb_diff_s_outer = nzb_s_outer + 2 |
|---|
| 785 | ELSE |
|---|
| 786 | nzb_diff_u = nzb_u_inner + 1 |
|---|
| 787 | nzb_diff_v = nzb_v_inner + 1 |
|---|
| 788 | nzb_diff_s_inner = nzb_s_inner + 1 |
|---|
| 789 | nzb_diff_s_outer = nzb_s_outer + 1 |
|---|
| 790 | ENDIF |
|---|
| 791 | |
|---|
| 792 | ! |
|---|
| 793 | !-- Calculation of wall switches and factors required by diffusion_u/v.f90 and |
|---|
| 794 | !-- for limitation of near-wall mixing length l_wall further below |
|---|
| 795 | corner_nl = 0 |
|---|
| 796 | corner_nr = 0 |
|---|
| 797 | corner_sl = 0 |
|---|
| 798 | corner_sr = 0 |
|---|
| 799 | wall_l = 0 |
|---|
| 800 | wall_n = 0 |
|---|
| 801 | wall_r = 0 |
|---|
| 802 | wall_s = 0 |
|---|
| 803 | |
|---|
| 804 | DO i = nxl, nxr |
|---|
| 805 | DO j = nys, nyn |
|---|
| 806 | ! |
|---|
| 807 | !-- u-component |
|---|
| 808 | IF ( nzb_u_outer(j,i) > nzb_u_outer(j+1,i) ) THEN |
|---|
| 809 | wall_u(j,i) = 1.0 ! north wall (location of adjacent fluid) |
|---|
| 810 | fym(j,i) = 0.0 |
|---|
| 811 | fyp(j,i) = 1.0 |
|---|
| 812 | ELSEIF ( nzb_u_outer(j,i) > nzb_u_outer(j-1,i) ) THEN |
|---|
| 813 | wall_u(j,i) = 1.0 ! south wall (location of adjacent fluid) |
|---|
| 814 | fym(j,i) = 1.0 |
|---|
| 815 | fyp(j,i) = 0.0 |
|---|
| 816 | ENDIF |
|---|
| 817 | ! |
|---|
| 818 | !-- v-component |
|---|
| 819 | IF ( nzb_v_outer(j,i) > nzb_v_outer(j,i+1) ) THEN |
|---|
| 820 | wall_v(j,i) = 1.0 ! rigth wall (location of adjacent fluid) |
|---|
| 821 | fxm(j,i) = 0.0 |
|---|
| 822 | fxp(j,i) = 1.0 |
|---|
| 823 | ELSEIF ( nzb_v_outer(j,i) > nzb_v_outer(j,i-1) ) THEN |
|---|
| 824 | wall_v(j,i) = 1.0 ! left wall (location of adjacent fluid) |
|---|
| 825 | fxm(j,i) = 1.0 |
|---|
| 826 | fxp(j,i) = 0.0 |
|---|
| 827 | ENDIF |
|---|
| 828 | ! |
|---|
| 829 | !-- w-component, also used for scalars, separate arrays for shear |
|---|
| 830 | !-- production of tke |
|---|
| 831 | IF ( nzb_w_outer(j,i) > nzb_w_outer(j+1,i) ) THEN |
|---|
| 832 | wall_e_y(j,i) = 1.0 ! north wall (location of adjacent fluid) |
|---|
| 833 | wall_w_y(j,i) = 1.0 |
|---|
| 834 | fwym(j,i) = 0.0 |
|---|
| 835 | fwyp(j,i) = 1.0 |
|---|
| 836 | ELSEIF ( nzb_w_outer(j,i) > nzb_w_outer(j-1,i) ) THEN |
|---|
| 837 | wall_e_y(j,i) = -1.0 ! south wall (location of adjacent fluid) |
|---|
| 838 | wall_w_y(j,i) = 1.0 |
|---|
| 839 | fwym(j,i) = 1.0 |
|---|
| 840 | fwyp(j,i) = 0.0 |
|---|
| 841 | ENDIF |
|---|
| 842 | IF ( nzb_w_outer(j,i) > nzb_w_outer(j,i+1) ) THEN |
|---|
| 843 | wall_e_x(j,i) = 1.0 ! right wall (location of adjacent fluid) |
|---|
| 844 | wall_w_x(j,i) = 1.0 |
|---|
| 845 | fwxm(j,i) = 0.0 |
|---|
| 846 | fwxp(j,i) = 1.0 |
|---|
| 847 | ELSEIF ( nzb_w_outer(j,i) > nzb_w_outer(j,i-1) ) THEN |
|---|
| 848 | wall_e_x(j,i) = -1.0 ! left wall (location of adjacent fluid) |
|---|
| 849 | wall_w_x(j,i) = 1.0 |
|---|
| 850 | fwxm(j,i) = 1.0 |
|---|
| 851 | fwxp(j,i) = 0.0 |
|---|
| 852 | ENDIF |
|---|
| 853 | ! |
|---|
| 854 | !-- Wall and corner locations inside buildings for limitation of |
|---|
| 855 | !-- near-wall mixing length l_wall |
|---|
| 856 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j+1,i) ) THEN |
|---|
| 857 | |
|---|
| 858 | wall_n(j,i) = nzb_s_inner(j+1,i) + 1 ! North wall |
|---|
| 859 | |
|---|
| 860 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i-1) ) THEN |
|---|
| 861 | corner_nl(j,i) = MAX( nzb_s_inner(j+1,i), & ! Northleft corner |
|---|
| 862 | nzb_s_inner(j,i-1) ) + 1 |
|---|
| 863 | ENDIF |
|---|
| 864 | |
|---|
| 865 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i+1) ) THEN |
|---|
| 866 | corner_nr(j,i) = MAX( nzb_s_inner(j+1,i), & ! Northright corner |
|---|
| 867 | nzb_s_inner(j,i+1) ) + 1 |
|---|
| 868 | ENDIF |
|---|
| 869 | |
|---|
| 870 | ENDIF |
|---|
| 871 | |
|---|
| 872 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j-1,i) ) THEN |
|---|
| 873 | |
|---|
| 874 | wall_s(j,i) = nzb_s_inner(j-1,i) + 1 ! South wall |
|---|
| 875 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i-1) ) THEN |
|---|
| 876 | corner_sl(j,i) = MAX( nzb_s_inner(j-1,i), & ! Southleft corner |
|---|
| 877 | nzb_s_inner(j,i-1) ) + 1 |
|---|
| 878 | ENDIF |
|---|
| 879 | |
|---|
| 880 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i+1) ) THEN |
|---|
| 881 | corner_sr(j,i) = MAX( nzb_s_inner(j-1,i), & ! Southright corner |
|---|
| 882 | nzb_s_inner(j,i+1) ) + 1 |
|---|
| 883 | ENDIF |
|---|
| 884 | |
|---|
| 885 | ENDIF |
|---|
| 886 | |
|---|
| 887 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i-1) ) THEN |
|---|
| 888 | wall_l(j,i) = nzb_s_inner(j,i-1) + 1 ! Left wall |
|---|
| 889 | ENDIF |
|---|
| 890 | |
|---|
| 891 | IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i+1) ) THEN |
|---|
| 892 | wall_r(j,i) = nzb_s_inner(j,i+1) + 1 ! Right wall |
|---|
| 893 | ENDIF |
|---|
| 894 | |
|---|
| 895 | ENDDO |
|---|
| 896 | ENDDO |
|---|
| 897 | |
|---|
| 898 | ! |
|---|
| 899 | !-- Calculate wall flag arrays for the multigrid method |
|---|
| 900 | IF ( psolver == 'multigrid' ) THEN |
|---|
| 901 | ! |
|---|
| 902 | !-- Gridpoint increment of the current level |
|---|
| 903 | inc = 1 |
|---|
| 904 | |
|---|
| 905 | DO l = maximum_grid_level, 1 , -1 |
|---|
| 906 | |
|---|
| 907 | nxl_l = nxl_mg(l) |
|---|
| 908 | nxr_l = nxr_mg(l) |
|---|
| 909 | nys_l = nys_mg(l) |
|---|
| 910 | nyn_l = nyn_mg(l) |
|---|
| 911 | nzt_l = nzt_mg(l) |
|---|
| 912 | |
|---|
| 913 | ! |
|---|
| 914 | !-- Assign the flag level to be calculated |
|---|
| 915 | SELECT CASE ( l ) |
|---|
| 916 | CASE ( 1 ) |
|---|
| 917 | flags => wall_flags_1 |
|---|
| 918 | CASE ( 2 ) |
|---|
| 919 | flags => wall_flags_2 |
|---|
| 920 | CASE ( 3 ) |
|---|
| 921 | flags => wall_flags_3 |
|---|
| 922 | CASE ( 4 ) |
|---|
| 923 | flags => wall_flags_4 |
|---|
| 924 | CASE ( 5 ) |
|---|
| 925 | flags => wall_flags_5 |
|---|
| 926 | CASE ( 6 ) |
|---|
| 927 | flags => wall_flags_6 |
|---|
| 928 | CASE ( 7 ) |
|---|
| 929 | flags => wall_flags_7 |
|---|
| 930 | CASE ( 8 ) |
|---|
| 931 | flags => wall_flags_8 |
|---|
| 932 | CASE ( 9 ) |
|---|
| 933 | flags => wall_flags_9 |
|---|
| 934 | CASE ( 10 ) |
|---|
| 935 | flags => wall_flags_10 |
|---|
| 936 | END SELECT |
|---|
| 937 | |
|---|
| 938 | ! |
|---|
| 939 | !-- Depending on the grid level, set the respective bits in case of |
|---|
| 940 | !-- neighbouring walls |
|---|
| 941 | !-- Bit 0: wall to the bottom |
|---|
| 942 | !-- Bit 1: wall to the top (not realized in remaining PALM code so far) |
|---|
| 943 | !-- Bit 2: wall to the south |
|---|
| 944 | !-- Bit 3: wall to the north |
|---|
| 945 | !-- Bit 4: wall to the left |
|---|
| 946 | !-- Bit 5: wall to the right |
|---|
| 947 | !-- Bit 6: inside building |
|---|
| 948 | |
|---|
| 949 | flags = 0 |
|---|
| 950 | |
|---|
| 951 | DO i = nxl_l-1, nxr_l+1 |
|---|
| 952 | DO j = nys_l-1, nyn_l+1 |
|---|
| 953 | DO k = nzb, nzt_l+1 |
|---|
| 954 | |
|---|
| 955 | ! |
|---|
| 956 | !-- Inside/outside building (inside building does not need |
|---|
| 957 | !-- further tests for walls) |
|---|
| 958 | IF ( k*inc <= nzb_local(j*inc,i*inc) ) THEN |
|---|
| 959 | |
|---|
| 960 | flags(k,j,i) = IBSET( flags(k,j,i), 6 ) |
|---|
| 961 | |
|---|
| 962 | ELSE |
|---|
| 963 | ! |
|---|
| 964 | !-- Bottom wall |
|---|
| 965 | IF ( (k-1)*inc <= nzb_local(j*inc,i*inc) ) THEN |
|---|
| 966 | flags(k,j,i) = IBSET( flags(k,j,i), 0 ) |
|---|
| 967 | ENDIF |
|---|
| 968 | ! |
|---|
| 969 | !-- South wall |
|---|
| 970 | IF ( k*inc <= nzb_local((j-1)*inc,i*inc) ) THEN |
|---|
| 971 | flags(k,j,i) = IBSET( flags(k,j,i), 2 ) |
|---|
| 972 | ENDIF |
|---|
| 973 | ! |
|---|
| 974 | !-- North wall |
|---|
| 975 | IF ( k*inc <= nzb_local((j+1)*inc,i*inc) ) THEN |
|---|
| 976 | flags(k,j,i) = IBSET( flags(k,j,i), 3 ) |
|---|
| 977 | ENDIF |
|---|
| 978 | ! |
|---|
| 979 | !-- Left wall |
|---|
| 980 | IF ( k*inc <= nzb_local(j*inc,(i-1)*inc) ) THEN |
|---|
| 981 | flags(k,j,i) = IBSET( flags(k,j,i), 4 ) |
|---|
| 982 | ENDIF |
|---|
| 983 | ! |
|---|
| 984 | !-- Right wall |
|---|
| 985 | IF ( k*inc <= nzb_local(j*inc,(i+1)*inc) ) THEN |
|---|
| 986 | flags(k,j,i) = IBSET( flags(k,j,i), 5 ) |
|---|
| 987 | ENDIF |
|---|
| 988 | |
|---|
| 989 | ENDIF |
|---|
| 990 | |
|---|
| 991 | ENDDO |
|---|
| 992 | ENDDO |
|---|
| 993 | ENDDO |
|---|
| 994 | |
|---|
| 995 | ! |
|---|
| 996 | !-- Test output of flag arrays |
|---|
| 997 | ! i = nxl_l |
|---|
| 998 | ! WRITE (9,*) ' ' |
|---|
| 999 | ! WRITE (9,*) '*** mg level ', l, ' ***', mg_switch_to_pe0_level |
|---|
| 1000 | ! WRITE (9,*) ' inc=', inc, ' i =', nxl_l |
|---|
| 1001 | ! WRITE (9,*) ' nxl_l',nxl_l,' nxr_l=',nxr_l,' nys_l=',nys_l,' nyn_l=',nyn_l |
|---|
| 1002 | ! DO k = nzt_l+1, nzb, -1 |
|---|
| 1003 | ! WRITE (9,'(194(1X,I2))') ( flags(k,j,i), j = nys_l-1, nyn_l+1 ) |
|---|
| 1004 | ! ENDDO |
|---|
| 1005 | |
|---|
| 1006 | inc = inc * 2 |
|---|
| 1007 | |
|---|
| 1008 | ENDDO |
|---|
| 1009 | |
|---|
| 1010 | ENDIF |
|---|
| 1011 | |
|---|
| 1012 | ! |
|---|
| 1013 | !-- In case of topography: limit near-wall mixing length l_wall further: |
|---|
| 1014 | !-- Go through all points of the subdomain one by one and look for the closest |
|---|
| 1015 | !-- surface |
|---|
| 1016 | IF ( TRIM(topography) /= 'flat' ) THEN |
|---|
| 1017 | DO i = nxl, nxr |
|---|
| 1018 | DO j = nys, nyn |
|---|
| 1019 | |
|---|
| 1020 | nzb_si = nzb_s_inner(j,i) |
|---|
| 1021 | vi = vertical_influence(nzb_si) |
|---|
| 1022 | |
|---|
| 1023 | IF ( wall_n(j,i) > 0 ) THEN |
|---|
| 1024 | ! |
|---|
| 1025 | !-- North wall (y distance) |
|---|
| 1026 | DO k = wall_n(j,i), nzb_si |
|---|
| 1027 | l_wall(k,j+1,i) = MIN( l_wall(k,j+1,i), 0.5 * dy ) |
|---|
| 1028 | ENDDO |
|---|
| 1029 | ! |
|---|
| 1030 | !-- Above North wall (yz distance) |
|---|
| 1031 | DO k = nzb_si + 1, nzb_si + vi |
|---|
| 1032 | l_wall(k,j+1,i) = MIN( l_wall(k,j+1,i), & |
|---|
| 1033 | SQRT( 0.25 * dy**2 + & |
|---|
| 1034 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 1035 | ENDDO |
|---|
| 1036 | ! |
|---|
| 1037 | !-- Northleft corner (xy distance) |
|---|
| 1038 | IF ( corner_nl(j,i) > 0 ) THEN |
|---|
| 1039 | DO k = corner_nl(j,i), nzb_si |
|---|
| 1040 | l_wall(k,j+1,i-1) = MIN( l_wall(k,j+1,i-1), & |
|---|
| 1041 | 0.5 * SQRT( dx**2 + dy**2 ) ) |
|---|
| 1042 | ENDDO |
|---|
| 1043 | ! |
|---|
| 1044 | !-- Above Northleft corner (xyz distance) |
|---|
| 1045 | DO k = nzb_si + 1, nzb_si + vi |
|---|
| 1046 | l_wall(k,j+1,i-1) = MIN( l_wall(k,j+1,i-1), & |
|---|
| 1047 | SQRT( 0.25 * (dx**2 + dy**2) + & |
|---|
| 1048 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 1049 | ENDDO |
|---|
| 1050 | ENDIF |
|---|
| 1051 | ! |
|---|
| 1052 | !-- Northright corner (xy distance) |
|---|
| 1053 | IF ( corner_nr(j,i) > 0 ) THEN |
|---|
| 1054 | DO k = corner_nr(j,i), nzb_si |
|---|
| 1055 | l_wall(k,j+1,i+1) = MIN( l_wall(k,j+1,i+1), & |
|---|
| 1056 | 0.5 * SQRT( dx**2 + dy**2 ) ) |
|---|
| 1057 | ENDDO |
|---|
| 1058 | ! |
|---|
| 1059 | !-- Above northright corner (xyz distance) |
|---|
| 1060 | DO k = nzb_si + 1, nzb_si + vi |
|---|
| 1061 | l_wall(k,j+1,i+1) = MIN( l_wall(k,j+1,i+1), & |
|---|
| 1062 | SQRT( 0.25 * (dx**2 + dy**2) + & |
|---|
| 1063 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 1064 | ENDDO |
|---|
| 1065 | ENDIF |
|---|
| 1066 | ENDIF |
|---|
| 1067 | |
|---|
| 1068 | IF ( wall_s(j,i) > 0 ) THEN |
|---|
| 1069 | ! |
|---|
| 1070 | !-- South wall (y distance) |
|---|
| 1071 | DO k = wall_s(j,i), nzb_si |
|---|
| 1072 | l_wall(k,j-1,i) = MIN( l_wall(k,j-1,i), 0.5 * dy ) |
|---|
| 1073 | ENDDO |
|---|
| 1074 | ! |
|---|
| 1075 | !-- Above south wall (yz distance) |
|---|
| 1076 | DO k = nzb_si + 1, & |
|---|
| 1077 | nzb_si + vi |
|---|
| 1078 | l_wall(k,j-1,i) = MIN( l_wall(k,j-1,i), & |
|---|
| 1079 | SQRT( 0.25 * dy**2 + & |
|---|
| 1080 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 1081 | ENDDO |
|---|
| 1082 | ! |
|---|
| 1083 | !-- Southleft corner (xy distance) |
|---|
| 1084 | IF ( corner_sl(j,i) > 0 ) THEN |
|---|
| 1085 | DO k = corner_sl(j,i), nzb_si |
|---|
| 1086 | l_wall(k,j-1,i-1) = MIN( l_wall(k,j-1,i-1), & |
|---|
| 1087 | 0.5 * SQRT( dx**2 + dy**2 ) ) |
|---|
| 1088 | ENDDO |
|---|
| 1089 | ! |
|---|
| 1090 | !-- Above southleft corner (xyz distance) |
|---|
| 1091 | DO k = nzb_si + 1, nzb_si + vi |
|---|
| 1092 | l_wall(k,j-1,i-1) = MIN( l_wall(k,j-1,i-1), & |
|---|
| 1093 | SQRT( 0.25 * (dx**2 + dy**2) + & |
|---|
| 1094 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 1095 | ENDDO |
|---|
| 1096 | ENDIF |
|---|
| 1097 | ! |
|---|
| 1098 | !-- Southright corner (xy distance) |
|---|
| 1099 | IF ( corner_sr(j,i) > 0 ) THEN |
|---|
| 1100 | DO k = corner_sr(j,i), nzb_si |
|---|
| 1101 | l_wall(k,j-1,i+1) = MIN( l_wall(k,j-1,i+1), & |
|---|
| 1102 | 0.5 * SQRT( dx**2 + dy**2 ) ) |
|---|
| 1103 | ENDDO |
|---|
| 1104 | ! |
|---|
| 1105 | !-- Above southright corner (xyz distance) |
|---|
| 1106 | DO k = nzb_si + 1, nzb_si + vi |
|---|
| 1107 | l_wall(k,j-1,i+1) = MIN( l_wall(k,j-1,i+1), & |
|---|
| 1108 | SQRT( 0.25 * (dx**2 + dy**2) + & |
|---|
| 1109 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 1110 | ENDDO |
|---|
| 1111 | ENDIF |
|---|
| 1112 | |
|---|
| 1113 | ENDIF |
|---|
| 1114 | |
|---|
| 1115 | IF ( wall_l(j,i) > 0 ) THEN |
|---|
| 1116 | ! |
|---|
| 1117 | !-- Left wall (x distance) |
|---|
| 1118 | DO k = wall_l(j,i), nzb_si |
|---|
| 1119 | l_wall(k,j,i-1) = MIN( l_wall(k,j,i-1), 0.5 * dx ) |
|---|
| 1120 | ENDDO |
|---|
| 1121 | ! |
|---|
| 1122 | !-- Above left wall (xz distance) |
|---|
| 1123 | DO k = nzb_si + 1, nzb_si + vi |
|---|
| 1124 | l_wall(k,j,i-1) = MIN( l_wall(k,j,i-1), & |
|---|
| 1125 | SQRT( 0.25 * dx**2 + & |
|---|
| 1126 | ( zu(k) - zw(nzb_si) )**2 ) ) |
|---|
| 1127 | ENDDO |
|---|
| 1128 | ENDIF |
|---|
| 1129 | |
|---|
| 1130 | IF ( wall_r(j,i) > 0 ) THEN |
|---|
| 1131 | ! |
|---|
| 1132 | !-- Right wall (x distance) |
|---|
| 1133 | DO k = wall_r(j,i), nzb_si |
|---|
| 1134 | l_wall(k,j,i+1) = MIN( l_wall(k,j,i+1), 0.5 * dx ) |
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| 1135 | ENDDO |
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| 1136 | ! |
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| 1137 | !-- Above right wall (xz distance) |
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| 1138 | DO k = nzb_si + 1, nzb_si + vi |
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| 1139 | l_wall(k,j,i+1) = MIN( l_wall(k,j,i+1), & |
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| 1140 | SQRT( 0.25 * dx**2 + & |
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| 1141 | ( zu(k) - zw(nzb_si) )**2 ) ) |
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| 1142 | ENDDO |
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| 1143 | |
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| 1144 | ENDIF |
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| 1145 | |
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| 1146 | ENDDO |
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| 1147 | ENDDO |
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| 1148 | |
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| 1149 | ENDIF |
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| 1150 | |
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| 1151 | ! |
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| 1152 | !-- Multiplication with wall_adjustment_factor |
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| 1153 | l_wall = wall_adjustment_factor * l_wall |
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| 1154 | |
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| 1155 | ! |
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| 1156 | !-- Set lateral boundary conditions for l_wall |
|---|
| 1157 | CALL exchange_horiz( l_wall, nbgp ) |
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| 1158 | |
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| 1159 | DEALLOCATE( corner_nl, corner_nr, corner_sl, corner_sr, nzb_local, & |
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| 1160 | nzb_tmp, vertical_influence, wall_l, wall_n, wall_r, wall_s ) |
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| 1161 | |
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| 1162 | |
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| 1163 | END SUBROUTINE init_grid |
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