| 1 | MODULE diffusion_w_mod |
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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 | ! $Log: diffusion_w.f90,v $ |
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| 11 | ! Revision 1.12 2006/02/23 10:38:03 raasch |
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| 12 | ! nzb_2d replaced by nzb_w_outer, wall functions added for all vertical walls, |
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| 13 | ! +z0 in argument list |
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| 14 | ! WARNING: loops containing the MAX function are still not properly vectorized! |
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| 15 | ! |
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| 16 | ! Revision 1.11 2005/03/26 20:11:05 raasch |
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| 17 | ! Additional damping layer at the outflow in case of non-cyclic lateral |
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| 18 | ! boundaries, additional arguments km_damp_x, km_damp_y |
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| 19 | ! |
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| 20 | ! Revision 1.10 2004/01/30 10:22:32 raasch |
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| 21 | ! Scalar lower k index nzb replaced by 2d-array nzb_2d |
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| 22 | ! |
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| 23 | ! Revision 1.9 2003/03/12 16:26:49 raasch |
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| 24 | ! Full code replaced in the call for all gridpoints instead of calling the |
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| 25 | ! _ij version (required by NEC, because otherwise no vectorization) |
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| 26 | ! |
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| 27 | ! Revision 1.8 2002/06/11 12:54:16 raasch |
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| 28 | ! Former subroutine changed to a module which allows to be called for all grid |
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| 29 | ! points of a single vertical column with index i,j or for all grid points by |
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| 30 | ! using function overloading. |
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| 31 | ! |
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| 32 | ! Revision 1.7 2001/03/30 07:12:35 raasch |
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| 33 | ! Translation of remaining German identifiers (variables, subroutines, etc.) |
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| 34 | ! |
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| 35 | ! Revision 1.6 2001/01/22 06:20:12 raasch |
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| 36 | ! Module test_variables removed |
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| 37 | ! |
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| 38 | ! Revision 1.5 2000/07/03 12:58:40 raasch |
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| 39 | ! dummy arguments, whose corresponding actual arguments are pointers, |
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| 40 | ! are now also defined as pointers, |
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| 41 | ! all comments translated into English |
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| 42 | ! |
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| 43 | ! Revision 1.4 1998/07/06 12:12:24 raasch |
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| 44 | ! + USE test_variables |
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| 45 | ! |
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| 46 | ! Revision 1.3 1997/09/12 07:24:58 raasch |
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| 47 | ! Leerzeilen mussten entfernt werden |
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| 48 | ! |
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| 49 | ! Revision 1.2 1997/09/12 06:44:00 raasch |
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| 50 | ! HP-Compiler erfordert & am Beginn von Fortsetzungszeilen |
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| 51 | ! |
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| 52 | ! Revision 1.1 1997/09/12 06:24:11 raasch |
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| 53 | ! Initial revision |
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| 54 | ! |
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| 55 | ! |
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| 56 | ! Description: |
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| 57 | ! ------------ |
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| 58 | ! Diffusion term of the w-component |
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| 59 | !------------------------------------------------------------------------------! |
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| 60 | |
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| 61 | PRIVATE |
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| 62 | PUBLIC diffusion_w |
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| 63 | |
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| 64 | INTERFACE diffusion_w |
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| 65 | MODULE PROCEDURE diffusion_w |
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| 66 | MODULE PROCEDURE diffusion_w_ij |
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| 67 | END INTERFACE diffusion_w |
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| 68 | |
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| 69 | CONTAINS |
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| 70 | |
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| 71 | |
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| 72 | !------------------------------------------------------------------------------! |
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| 73 | ! Call for all grid points |
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| 74 | !------------------------------------------------------------------------------! |
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| 75 | SUBROUTINE diffusion_w( ddzu, ddzw, km, km_damp_x, km_damp_y, tend, u, v, & |
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| 76 | w, z0 ) |
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| 77 | |
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| 78 | USE control_parameters |
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| 79 | USE grid_variables |
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| 80 | USE indices |
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| 81 | |
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| 82 | IMPLICIT NONE |
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| 83 | |
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| 84 | INTEGER :: i, j, k |
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| 85 | REAL :: kmxm_x, kmxm_z, kmxp_x, kmxp_z, kmym_y, kmym_z, kmyp_y, & |
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| 86 | kmyp_z, wsus, wsvs |
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| 87 | REAL :: ddzu(1:nzt+1), ddzw(1:nzt), km_damp_x(nxl-1:nxr+1), & |
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| 88 | km_damp_y(nys-1:nyn+1) |
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| 89 | REAL :: z0(nys-1:nyn+1,nxl-1:nxr+1) |
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| 90 | REAL :: tend(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) |
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| 91 | REAL, DIMENSION(:,:,:), POINTER :: km, u, v, w |
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| 92 | |
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| 93 | |
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| 94 | DO i = nxl, nxr |
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| 95 | DO j = nys, nyn |
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| 96 | DO k = nzb_w_outer(j,i)+1, nzt-1 |
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| 97 | ! |
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| 98 | !-- Interpolate eddy diffusivities on staggered gridpoints |
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| 99 | kmxp_x = 0.25 * & |
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| 100 | ( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) ) |
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| 101 | kmxm_x = 0.25 * & |
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| 102 | ( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) ) |
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| 103 | kmxp_z = kmxp_x |
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| 104 | kmxm_z = kmxm_x |
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| 105 | kmyp_y = 0.25 * & |
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| 106 | ( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) ) |
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| 107 | kmym_y = 0.25 * & |
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| 108 | ( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) ) |
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| 109 | kmyp_z = kmyp_y |
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| 110 | kmym_z = kmym_y |
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| 111 | ! |
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| 112 | !-- Increase diffusion at the outflow boundary in case of |
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| 113 | !-- non-cyclic lateral boundaries. Damping is only needed for |
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| 114 | !-- velocity components parallel to the outflow boundary in |
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| 115 | !-- the direction normal to the outflow boundary. |
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| 116 | IF ( bc_lr /= 'cyclic' ) THEN |
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| 117 | kmxp_x = MAX( kmxp_x, km_damp_x(i) ) |
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| 118 | kmxm_x = MAX( kmxm_x, km_damp_x(i) ) |
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| 119 | ENDIF |
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| 120 | IF ( bc_ns /= 'cyclic' ) THEN |
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| 121 | kmyp_y = MAX( kmyp_y, km_damp_y(j) ) |
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| 122 | kmym_y = MAX( kmym_y, km_damp_y(j) ) |
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| 123 | ENDIF |
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| 124 | |
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| 125 | tend(k,j,i) = tend(k,j,i) & |
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| 126 | & + ( kmxp_x * ( w(k,j,i+1) - w(k,j,i) ) * ddx & |
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| 127 | & + kmxp_z * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) & |
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| 128 | & - kmxm_x * ( w(k,j,i) - w(k,j,i-1) ) * ddx & |
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| 129 | & - kmxm_z * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) & |
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| 130 | & ) * ddx & |
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| 131 | & + ( kmyp_y * ( w(k,j+1,i) - w(k,j,i) ) * ddy & |
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| 132 | & + kmyp_z * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) & |
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| 133 | & - kmym_y * ( w(k,j,i) - w(k,j-1,i) ) * ddy & |
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| 134 | & - kmym_z * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) & |
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| 135 | & ) * ddy & |
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| 136 | & + 2.0 * ( & |
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| 137 | & km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) & |
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| 138 | & - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) & |
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| 139 | & ) * ddzu(k+1) |
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| 140 | ENDDO |
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| 141 | |
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| 142 | ! |
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| 143 | !-- Wall functions at all vertical walls, where necessary |
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| 144 | IF ( wall_w_x(j,i) /= 0.0 .OR. wall_w_y(j,i) /= 0.0 ) THEN |
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| 145 | DO k = nzb_w_inner(j,i)+1, nzb_w_outer(j,i) |
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| 146 | IF ( wall_w_x(j,i) /= 0.0 ) THEN |
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| 147 | wsus = kappa * w(k,j,i) / LOG( 0.5 * dx / z0(j,i)) |
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| 148 | wsus = -wsus * ABS( wsus ) |
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| 149 | ELSE |
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| 150 | wsus = 0.0 |
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| 151 | ENDIF |
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| 152 | IF ( wall_w_y(j,i) /= 0.0 ) THEN |
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| 153 | wsvs = kappa * w(k,j,i) / LOG( 0.5 * dy / z0(j,i)) |
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| 154 | wsvs = -wsvs * ABS( wsvs ) |
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| 155 | ELSE |
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| 156 | wsvs = 0.0 |
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| 157 | ENDIF |
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| 158 | ! |
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| 159 | !-- Interpolate eddy diffusivities on staggered gridpoints |
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| 160 | kmxp_x = 0.25 * & |
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| 161 | ( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) ) |
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| 162 | kmxm_x = 0.25 * & |
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| 163 | ( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) ) |
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| 164 | kmxp_z = kmxp_x |
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| 165 | kmxm_z = kmxm_x |
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| 166 | kmyp_y = 0.25 * & |
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| 167 | ( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) ) |
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| 168 | kmym_y = 0.25 * & |
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| 169 | ( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) ) |
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| 170 | kmyp_z = kmyp_y |
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| 171 | kmym_z = kmym_y |
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| 172 | ! |
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| 173 | !-- Increase diffusion at the outflow boundary in case of |
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| 174 | !-- non-cyclic lateral boundaries. Damping is only needed for |
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| 175 | !-- velocity components parallel to the outflow boundary in |
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| 176 | !-- the direction normal to the outflow boundary. |
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| 177 | IF ( bc_lr /= 'cyclic' ) THEN |
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| 178 | kmxp_x = MAX( kmxp_x, km_damp_x(i) ) |
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| 179 | kmxm_x = MAX( kmxm_x, km_damp_x(i) ) |
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| 180 | ENDIF |
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| 181 | IF ( bc_ns /= 'cyclic' ) THEN |
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| 182 | kmyp_y = MAX( kmyp_y, km_damp_y(j) ) |
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| 183 | kmym_y = MAX( kmym_y, km_damp_y(j) ) |
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| 184 | ENDIF |
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| 185 | |
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| 186 | tend(k,j,i) = tend(k,j,i) & |
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| 187 | + ( fwxp(j,i) * ( & |
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| 188 | kmxp_x * ( w(k,j,i+1) - w(k,j,i) ) * ddx & |
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| 189 | + kmxp_z * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) & |
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| 190 | ) & |
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| 191 | - fwxm(j,i) * ( & |
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| 192 | kmxm_x * ( w(k,j,i) - w(k,j,i-1) ) * ddx & |
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| 193 | + kmxm_z * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) & |
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| 194 | ) & |
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| 195 | + wall_w_x(j,i) * wsus & |
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| 196 | ) * ddx & |
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| 197 | + ( fwyp(j,i) * ( & |
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| 198 | kmyp_y * ( w(k,j+1,i) - w(k,j,i) ) * ddy & |
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| 199 | + kmyp_z * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) & |
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| 200 | ) & |
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| 201 | - fwym(j,i) * ( & |
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| 202 | kmym_y * ( w(k,j,i) - w(k,j-1,i) ) * ddy & |
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| 203 | + kmym_z * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) & |
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| 204 | ) & |
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| 205 | + wall_w_y(j,i) * wsvs & |
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| 206 | ) * ddy & |
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| 207 | + 2.0 * ( & |
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| 208 | km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) & |
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| 209 | - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) & |
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| 210 | ) * ddzu(k+1) |
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| 211 | ENDDO |
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| 212 | ENDIF |
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| 213 | |
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| 214 | ENDDO |
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| 215 | ENDDO |
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| 216 | |
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| 217 | END SUBROUTINE diffusion_w |
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| 218 | |
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| 219 | |
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| 220 | !------------------------------------------------------------------------------! |
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| 221 | ! Call for grid point i,j |
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| 222 | !------------------------------------------------------------------------------! |
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| 223 | SUBROUTINE diffusion_w_ij( i, j, ddzu, ddzw, km, km_damp_x, km_damp_y, & |
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| 224 | tend, u, v, w, z0 ) |
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| 225 | |
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| 226 | USE control_parameters |
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| 227 | USE grid_variables |
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| 228 | USE indices |
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| 229 | |
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| 230 | IMPLICIT NONE |
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| 231 | |
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| 232 | INTEGER :: i, j, k |
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| 233 | REAL :: kmxm_x, kmxm_z, kmxp_x, kmxp_z, kmym_y, kmym_z, kmyp_y, & |
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| 234 | kmyp_z, wsus, wsvs |
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| 235 | REAL :: ddzu(1:nzt+1), ddzw(1:nzt), km_damp_x(nxl-1:nxr+1), & |
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| 236 | km_damp_y(nys-1:nyn+1) |
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| 237 | REAL :: z0(nys-1:nyn+1,nxl-1:nxr+1) |
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| 238 | REAL :: tend(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) |
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| 239 | REAL, DIMENSION(:,:,:), POINTER :: km, u, v, w |
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| 240 | |
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| 241 | |
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| 242 | DO k = nzb_w_outer(j,i)+1, nzt-1 |
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| 243 | ! |
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| 244 | !-- Interpolate eddy diffusivities on staggered gridpoints |
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| 245 | kmxp_x = 0.25 * ( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) ) |
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| 246 | kmxm_x = 0.25 * ( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) ) |
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| 247 | kmxp_z = kmxp_x |
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| 248 | kmxm_z = kmxm_x |
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| 249 | kmyp_y = 0.25 * ( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) ) |
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| 250 | kmym_y = 0.25 * ( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) ) |
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| 251 | kmyp_z = kmyp_y |
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| 252 | kmym_z = kmym_y |
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| 253 | ! |
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| 254 | !-- Increase diffusion at the outflow boundary in case of non-cyclic |
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| 255 | !-- lateral boundaries. Damping is only needed for velocity components |
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| 256 | !-- parallel to the outflow boundary in the direction normal to the |
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| 257 | !-- outflow boundary. |
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| 258 | IF ( bc_lr /= 'cyclic' ) THEN |
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| 259 | kmxp_x = MAX( kmxp_x, km_damp_x(i) ) |
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| 260 | kmxm_x = MAX( kmxm_x, km_damp_x(i) ) |
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| 261 | ENDIF |
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| 262 | IF ( bc_ns /= 'cyclic' ) THEN |
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| 263 | kmyp_y = MAX( kmyp_y, km_damp_y(j) ) |
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| 264 | kmym_y = MAX( kmym_y, km_damp_y(j) ) |
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| 265 | ENDIF |
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| 266 | |
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| 267 | tend(k,j,i) = tend(k,j,i) & |
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| 268 | & + ( kmxp_x * ( w(k,j,i+1) - w(k,j,i) ) * ddx & |
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| 269 | & + kmxp_z * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) & |
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| 270 | & - kmxm_x * ( w(k,j,i) - w(k,j,i-1) ) * ddx & |
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| 271 | & - kmxm_z * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) & |
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| 272 | & ) * ddx & |
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| 273 | & + ( kmyp_y * ( w(k,j+1,i) - w(k,j,i) ) * ddy & |
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| 274 | & + kmyp_z * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) & |
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| 275 | & - kmym_y * ( w(k,j,i) - w(k,j-1,i) ) * ddy & |
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| 276 | & - kmym_z * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) & |
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| 277 | & ) * ddy & |
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| 278 | & + 2.0 * ( & |
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| 279 | & km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) & |
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| 280 | & - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) & |
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| 281 | & ) * ddzu(k+1) |
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| 282 | ENDDO |
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| 283 | |
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| 284 | ! |
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| 285 | !-- Wall functions at all vertical walls, where necessary |
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| 286 | IF ( wall_w_x(j,i) /= 0.0 .OR. wall_w_y(j,i) /= 0.0 ) THEN |
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| 287 | DO k = nzb_w_inner(j,i)+1, nzb_w_outer(j,i) |
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| 288 | IF ( wall_w_x(j,i) /= 0.0 ) THEN |
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| 289 | wsus = kappa * w(k,j,i) / LOG( 0.5 * dx / z0(j,i)) |
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| 290 | wsus = -wsus * ABS( wsus ) |
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| 291 | ELSE |
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| 292 | wsus = 0.0 |
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| 293 | ENDIF |
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| 294 | IF ( wall_w_y(j,i) /= 0.0 ) THEN |
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| 295 | wsvs = kappa * w(k,j,i) / LOG( 0.5 * dy / z0(j,i)) |
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| 296 | wsvs = -wsvs * ABS( wsvs ) |
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| 297 | ELSE |
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| 298 | wsvs = 0.0 |
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| 299 | ENDIF |
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| 300 | ! |
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| 301 | !-- Interpolate eddy diffusivities on staggered gridpoints |
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| 302 | kmxp_x = 0.25 * ( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) ) |
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| 303 | kmxm_x = 0.25 * ( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) ) |
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| 304 | kmxp_z = kmxp_x |
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| 305 | kmxm_z = kmxm_x |
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| 306 | kmyp_y = 0.25 * ( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) ) |
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| 307 | kmym_y = 0.25 * ( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) ) |
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| 308 | kmyp_z = kmyp_y |
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| 309 | kmym_z = kmym_y |
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| 310 | ! |
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| 311 | !-- Increase diffusion at the outflow boundary in case of |
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| 312 | !-- non-cyclic lateral boundaries. Damping is only needed for |
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| 313 | !-- velocity components parallel to the outflow boundary in |
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| 314 | !-- the direction normal to the outflow boundary. |
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| 315 | IF ( bc_lr /= 'cyclic' ) THEN |
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| 316 | kmxp_x = MAX( kmxp_x, km_damp_x(i) ) |
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| 317 | kmxm_x = MAX( kmxm_x, km_damp_x(i) ) |
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| 318 | ENDIF |
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| 319 | IF ( bc_ns /= 'cyclic' ) THEN |
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| 320 | kmyp_y = MAX( kmyp_y, km_damp_y(j) ) |
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| 321 | kmym_y = MAX( kmym_y, km_damp_y(j) ) |
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| 322 | ENDIF |
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| 323 | |
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| 324 | tend(k,j,i) = tend(k,j,i) & |
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| 325 | + ( fwxp(j,i) * ( & |
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| 326 | kmxp_x * ( w(k,j,i+1) - w(k,j,i) ) * ddx & |
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| 327 | + kmxp_z * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) & |
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| 328 | ) & |
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| 329 | - fwxm(j,i) * ( & |
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| 330 | kmxm_x * ( w(k,j,i) - w(k,j,i-1) ) * ddx & |
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| 331 | + kmxm_z * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) & |
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| 332 | ) & |
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| 333 | + wall_w_x(j,i) * wsus & |
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| 334 | ) * ddx & |
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| 335 | + ( fwyp(j,i) * ( & |
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| 336 | kmyp_y * ( w(k,j+1,i) - w(k,j,i) ) * ddy & |
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| 337 | + kmyp_z * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) & |
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| 338 | ) & |
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| 339 | - fwym(j,i) * ( & |
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| 340 | kmym_y * ( w(k,j,i) - w(k,j-1,i) ) * ddy & |
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| 341 | + kmym_z * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) & |
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| 342 | ) & |
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| 343 | + wall_w_y(j,i) * wsvs & |
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| 344 | ) * ddy & |
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| 345 | + 2.0 * ( & |
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| 346 | km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) & |
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| 347 | - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) & |
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| 348 | ) * ddzu(k+1) |
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| 349 | ENDDO |
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| 350 | ENDIF |
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| 351 | |
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| 352 | END SUBROUTINE diffusion_w_ij |
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| 353 | |
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| 354 | END MODULE diffusion_w_mod |
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