[1873] | 1 | !> @file diffusion_e.f90 |
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[2000] | 2 | !------------------------------------------------------------------------------! |
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[1036] | 3 | ! This file is part of PALM. |
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| 4 | ! |
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[2000] | 5 | ! PALM is free software: you can redistribute it and/or modify it under the |
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| 6 | ! terms of the GNU General Public License as published by the Free Software |
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| 7 | ! Foundation, either version 3 of the License, or (at your option) any later |
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| 8 | ! version. |
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[1036] | 9 | ! |
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| 10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
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| 11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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| 12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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| 13 | ! |
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| 14 | ! You should have received a copy of the GNU General Public License along with |
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| 15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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| 16 | ! |
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[2101] | 17 | ! Copyright 1997-2017 Leibniz Universitaet Hannover |
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[2000] | 18 | !------------------------------------------------------------------------------! |
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[1036] | 19 | ! |
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[484] | 20 | ! Current revisions: |
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[1] | 21 | ! ----------------- |
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[2232] | 22 | ! Adjustments to new topography and surface concept |
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[1341] | 23 | ! |
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[1321] | 24 | ! Former revisions: |
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| 25 | ! ----------------- |
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| 26 | ! $Id: diffusion_e.f90 2232 2017-05-30 17:47:52Z suehring $ |
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| 27 | ! |
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[2119] | 28 | ! 2118 2017-01-17 16:38:49Z raasch |
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| 29 | ! OpenACC version of subroutine removed |
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| 30 | ! |
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[2038] | 31 | ! 2037 2016-10-26 11:15:40Z knoop |
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| 32 | ! Anelastic approximation implemented |
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| 33 | ! |
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[2001] | 34 | ! 2000 2016-08-20 18:09:15Z knoop |
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| 35 | ! Forced header and separation lines into 80 columns |
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| 36 | ! |
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[1874] | 37 | ! 1873 2016-04-18 14:50:06Z maronga |
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| 38 | ! Module renamed (removed _mod) |
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| 39 | ! |
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[1851] | 40 | ! 1850 2016-04-08 13:29:27Z maronga |
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| 41 | ! Module renamed |
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| 42 | ! Adapted for modularization of microphysics |
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| 43 | ! |
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[1832] | 44 | ! 1831 2016-04-07 13:15:51Z hoffmann |
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| 45 | ! turbulence renamed collision_turbulence |
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| 46 | ! |
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[1683] | 47 | ! 1682 2015-10-07 23:56:08Z knoop |
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| 48 | ! Code annotations made doxygen readable |
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| 49 | ! |
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[1375] | 50 | ! 1374 2014-04-25 12:55:07Z raasch |
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| 51 | ! missing variables added to ONLY list |
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| 52 | ! rif removed from acc-present-list |
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| 53 | ! |
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[1341] | 54 | ! 1340 2014-03-25 19:45:13Z kanani |
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| 55 | ! REAL constants defined as wp-kind |
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| 56 | ! |
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[1321] | 57 | ! 1320 2014-03-20 08:40:49Z raasch |
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[1320] | 58 | ! ONLY-attribute added to USE-statements, |
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| 59 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
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| 60 | ! kinds are defined in new module kinds, |
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| 61 | ! revision history before 2012 removed, |
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| 62 | ! comment fields (!:) to be used for variable explanations added to |
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| 63 | ! all variable declaration statements |
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[98] | 64 | ! |
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[1258] | 65 | ! 1257 2013-11-08 15:18:40Z raasch |
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| 66 | ! openacc loop and loop vector clauses removed |
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| 67 | ! |
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[1182] | 68 | ! 1179 2013-06-14 05:57:58Z raasch |
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| 69 | ! use_reference renamed use_single_reference_value |
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| 70 | ! |
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[1172] | 71 | ! 1171 2013-05-30 11:27:45Z raasch |
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| 72 | ! use_reference-case activated in accelerator version |
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| 73 | ! |
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[1132] | 74 | ! 1128 2013-04-12 06:19:32Z raasch |
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| 75 | ! loop index bounds in accelerator version replaced by i_left, i_right, j_south, |
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| 76 | ! j_north |
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| 77 | ! |
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[1066] | 78 | ! 1065 2012-11-22 17:42:36Z hoffmann |
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| 79 | ! Enabled the claculation of diss in case of turbulence = .TRUE. (parameterized |
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| 80 | ! effects of turbulence on autoconversion and accretion in two-moments cloud |
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| 81 | ! physics scheme). |
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| 82 | ! |
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[1037] | 83 | ! 1036 2012-10-22 13:43:42Z raasch |
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| 84 | ! code put under GPL (PALM 3.9) |
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| 85 | ! |
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[1017] | 86 | ! 1015 2012-09-27 09:23:24Z raasch |
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| 87 | ! accelerator version (*_acc) added, |
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| 88 | ! adjustment of mixing length to the Prandtl mixing length at first grid point |
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| 89 | ! above ground removed |
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| 90 | ! |
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[1011] | 91 | ! 1010 2012-09-20 07:59:54Z raasch |
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| 92 | ! cpp switch __nopointer added for pointer free version |
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| 93 | ! |
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[1002] | 94 | ! 1001 2012-09-13 14:08:46Z raasch |
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| 95 | ! most arrays comunicated by module instead of parameter list |
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| 96 | ! |
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[826] | 97 | ! 825 2012-02-19 03:03:44Z raasch |
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| 98 | ! wang_collision_kernel renamed wang_kernel |
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| 99 | ! |
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[1] | 100 | ! Revision 1.1 1997/09/19 07:40:24 raasch |
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| 101 | ! Initial revision |
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| 102 | ! |
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| 103 | ! |
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| 104 | ! Description: |
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| 105 | ! ------------ |
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[1682] | 106 | !> Diffusion- and dissipation terms for the TKE |
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[1] | 107 | !------------------------------------------------------------------------------! |
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[1682] | 108 | MODULE diffusion_e_mod |
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| 109 | |
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[1] | 110 | |
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| 111 | PRIVATE |
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[2118] | 112 | PUBLIC diffusion_e |
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[1] | 113 | |
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| 114 | |
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| 115 | INTERFACE diffusion_e |
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| 116 | MODULE PROCEDURE diffusion_e |
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| 117 | MODULE PROCEDURE diffusion_e_ij |
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| 118 | END INTERFACE diffusion_e |
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| 119 | |
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| 120 | CONTAINS |
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| 121 | |
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| 122 | |
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| 123 | !------------------------------------------------------------------------------! |
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[1682] | 124 | ! Description: |
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| 125 | ! ------------ |
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| 126 | !> Call for all grid points |
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[1] | 127 | !------------------------------------------------------------------------------! |
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[1001] | 128 | SUBROUTINE diffusion_e( var, var_reference ) |
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[1] | 129 | |
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[1320] | 130 | USE arrays_3d, & |
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[2232] | 131 | ONLY: dd2zu, ddzu, ddzw, diss, e, km, l_grid, l_wall, tend, zu, zw,& |
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[2037] | 132 | drho_air, rho_air_zw |
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[1320] | 133 | |
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| 134 | USE control_parameters, & |
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[1831] | 135 | ONLY: atmos_ocean_sign, g, use_single_reference_value, & |
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[1320] | 136 | wall_adjustment, wall_adjustment_factor |
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[1831] | 137 | |
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[1320] | 138 | USE grid_variables, & |
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| 139 | ONLY: ddx2, ddy2 |
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| 140 | |
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| 141 | USE indices, & |
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[2232] | 142 | ONLY: nxl, nxlg, nxr, nxrg, nyn, nyng, nys, nysg, nzb, nzb_max, & |
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| 143 | nzt, wall_flags_0 |
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[1320] | 144 | |
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| 145 | USE kinds |
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[1849] | 146 | |
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| 147 | USE microphysics_mod, & |
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| 148 | ONLY: collision_turbulence |
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| 149 | |
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[1320] | 150 | USE particle_attributes, & |
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| 151 | ONLY: use_sgs_for_particles, wang_kernel |
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[1] | 152 | |
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[2232] | 153 | USE surface_mod, & |
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| 154 | ONLY : bc_h |
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| 155 | |
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[1] | 156 | IMPLICIT NONE |
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| 157 | |
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[2232] | 158 | INTEGER(iwp) :: i !< running index x direction |
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| 159 | INTEGER(iwp) :: j !< running index y direction |
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| 160 | INTEGER(iwp) :: k !< running index z direction |
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| 161 | INTEGER(iwp) :: m !< running index surface elements |
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| 162 | |
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[1682] | 163 | REAL(wp) :: dvar_dz !< |
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[2232] | 164 | REAL(wp) :: flag !< flag to mask topography |
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[1682] | 165 | REAL(wp) :: l_stable !< |
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| 166 | REAL(wp) :: var_reference !< |
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[1001] | 167 | |
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[1010] | 168 | #if defined( __nopointer ) |
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[1682] | 169 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: var !< |
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[1010] | 170 | #else |
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[1682] | 171 | REAL(wp), DIMENSION(:,:,:), POINTER :: var !< |
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[1010] | 172 | #endif |
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[1682] | 173 | REAL(wp), DIMENSION(nzb+1:nzt,nys:nyn) :: dissipation !< |
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| 174 | REAL(wp), DIMENSION(nzb+1:nzt,nys:nyn) :: l !< |
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| 175 | REAL(wp), DIMENSION(nzb+1:nzt,nys:nyn) :: ll !< |
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[1] | 176 | |
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| 177 | |
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| 178 | ! |
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[65] | 179 | !-- This if clause must be outside the k-loop because otherwise |
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| 180 | !-- runtime errors occur with -C hopt on NEC |
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[1179] | 181 | IF ( use_single_reference_value ) THEN |
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[65] | 182 | |
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| 183 | DO i = nxl, nxr |
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| 184 | DO j = nys, nyn |
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[2232] | 185 | DO k = nzb+1, nzt |
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[1] | 186 | ! |
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[65] | 187 | !-- Calculate the mixing length (for dissipation) |
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[97] | 188 | dvar_dz = atmos_ocean_sign * & |
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| 189 | ( var(k+1,j,i) - var(k-1,j,i) ) * dd2zu(k) |
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[1340] | 190 | IF ( dvar_dz > 0.0_wp ) THEN |
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| 191 | l_stable = 0.76_wp * SQRT( e(k,j,i) ) / & |
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| 192 | SQRT( g / var_reference * dvar_dz ) + 1E-5_wp |
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[57] | 193 | ELSE |
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[65] | 194 | l_stable = l_grid(k) |
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[57] | 195 | ENDIF |
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[1] | 196 | ! |
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[65] | 197 | !-- Adjustment of the mixing length |
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| 198 | IF ( wall_adjustment ) THEN |
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[2232] | 199 | l(k,j) = MIN( wall_adjustment_factor * l_wall(k,j,i), & |
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[94] | 200 | l_grid(k), l_stable ) |
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[2232] | 201 | ll(k,j) = MIN( wall_adjustment_factor * l_wall(k,j,i), & |
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[94] | 202 | l_grid(k) ) |
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[65] | 203 | ELSE |
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| 204 | l(k,j) = MIN( l_grid(k), l_stable ) |
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| 205 | ll(k,j) = l_grid(k) |
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| 206 | ENDIF |
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[1] | 207 | |
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[65] | 208 | ENDDO |
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[1] | 209 | ENDDO |
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[65] | 210 | |
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[1] | 211 | ! |
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[65] | 212 | !-- Calculate the tendency terms |
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| 213 | DO j = nys, nyn |
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[2232] | 214 | DO k = nzb+1, nzt |
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| 215 | ! |
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| 216 | !-- Predetermine flag to mask topography |
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| 217 | flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j,i), 0 ) ) |
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[1] | 218 | |
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[2232] | 219 | dissipation(k,j) = ( 0.19_wp + 0.74_wp * l(k,j) / ll(k,j) ) * & |
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[65] | 220 | e(k,j,i) * SQRT( e(k,j,i) ) / l(k,j) |
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[1] | 221 | |
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[2232] | 222 | tend(k,j,i) = tend(k,j,i) & |
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[1] | 223 | + ( & |
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| 224 | ( km(k,j,i)+km(k,j,i+1) ) * ( e(k,j,i+1)-e(k,j,i) ) & |
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| 225 | - ( km(k,j,i)+km(k,j,i-1) ) * ( e(k,j,i)-e(k,j,i-1) ) & |
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[2232] | 226 | ) * ddx2 * flag & |
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[1] | 227 | + ( & |
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| 228 | ( km(k,j,i)+km(k,j+1,i) ) * ( e(k,j+1,i)-e(k,j,i) ) & |
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| 229 | - ( km(k,j,i)+km(k,j-1,i) ) * ( e(k,j,i)-e(k,j-1,i) ) & |
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[2232] | 230 | ) * ddy2 * flag & |
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[1] | 231 | + ( & |
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| 232 | ( km(k,j,i)+km(k+1,j,i) ) * ( e(k+1,j,i)-e(k,j,i) ) * ddzu(k+1) & |
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[2037] | 233 | * rho_air_zw(k) & |
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[1] | 234 | - ( km(k,j,i)+km(k-1,j,i) ) * ( e(k,j,i)-e(k-1,j,i) ) * ddzu(k) & |
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[2037] | 235 | * rho_air_zw(k-1) & |
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[2232] | 236 | ) * ddzw(k) * drho_air(k) * flag & |
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| 237 | - dissipation(k,j) * flag |
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[1] | 238 | |
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[65] | 239 | ENDDO |
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[1] | 240 | ENDDO |
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[65] | 241 | |
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| 242 | ! |
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| 243 | !-- Store dissipation if needed for calculating the sgs particle |
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| 244 | !-- velocities |
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[1065] | 245 | IF ( use_sgs_for_particles .OR. wang_kernel .OR. & |
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[1831] | 246 | collision_turbulence ) THEN |
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[65] | 247 | DO j = nys, nyn |
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[2232] | 248 | DO k = nzb+1, nzt |
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| 249 | diss(k,j,i) = dissipation(k,j) * & |
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| 250 | MERGE( 1.0_wp, 0.0_wp, & |
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| 251 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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[65] | 252 | ENDDO |
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| 253 | ENDDO |
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| 254 | ENDIF |
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| 255 | |
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[1] | 256 | ENDDO |
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| 257 | |
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[65] | 258 | ELSE |
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| 259 | |
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| 260 | DO i = nxl, nxr |
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| 261 | DO j = nys, nyn |
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[2232] | 262 | DO k = nzb+1, nzt |
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[65] | 263 | ! |
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| 264 | !-- Calculate the mixing length (for dissipation) |
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[97] | 265 | dvar_dz = atmos_ocean_sign * & |
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| 266 | ( var(k+1,j,i) - var(k-1,j,i) ) * dd2zu(k) |
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[1340] | 267 | IF ( dvar_dz > 0.0_wp ) THEN |
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| 268 | l_stable = 0.76_wp * SQRT( e(k,j,i) ) / & |
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| 269 | SQRT( g / var(k,j,i) * dvar_dz ) + 1E-5_wp |
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[65] | 270 | ELSE |
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| 271 | l_stable = l_grid(k) |
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| 272 | ENDIF |
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| 273 | ! |
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| 274 | !-- Adjustment of the mixing length |
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| 275 | IF ( wall_adjustment ) THEN |
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[2232] | 276 | l(k,j) = MIN( wall_adjustment_factor * l_wall(k,j,i), & |
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[94] | 277 | l_grid(k), l_stable ) |
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[2232] | 278 | ll(k,j) = MIN( wall_adjustment_factor * l_wall(k,j,i), & |
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[94] | 279 | l_grid(k) ) |
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[65] | 280 | ELSE |
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| 281 | l(k,j) = MIN( l_grid(k), l_stable ) |
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| 282 | ll(k,j) = l_grid(k) |
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| 283 | ENDIF |
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| 284 | |
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| 285 | ENDDO |
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| 286 | ENDDO |
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| 287 | |
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| 288 | ! |
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| 289 | !-- Calculate the tendency terms |
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[1] | 290 | DO j = nys, nyn |
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[2232] | 291 | DO k = nzb+1, nzt |
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| 292 | ! |
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| 293 | !-- Predetermine flag to mask topography |
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| 294 | flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j,i), 0 ) ) |
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[65] | 295 | |
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[2232] | 296 | dissipation(k,j) = ( 0.19_wp + 0.74_wp * l(k,j) / ll(k,j) ) *& |
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[1340] | 297 | e(k,j,i) * SQRT( e(k,j,i) ) / l(k,j) |
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[65] | 298 | |
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[2232] | 299 | tend(k,j,i) = tend(k,j,i) & |
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[65] | 300 | + ( & |
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| 301 | ( km(k,j,i)+km(k,j,i+1) ) * ( e(k,j,i+1)-e(k,j,i) ) & |
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| 302 | - ( km(k,j,i)+km(k,j,i-1) ) * ( e(k,j,i)-e(k,j,i-1) ) & |
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[2232] | 303 | ) * ddx2 * flag & |
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[65] | 304 | + ( & |
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| 305 | ( km(k,j,i)+km(k,j+1,i) ) * ( e(k,j+1,i)-e(k,j,i) ) & |
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| 306 | - ( km(k,j,i)+km(k,j-1,i) ) * ( e(k,j,i)-e(k,j-1,i) ) & |
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[2232] | 307 | ) * ddy2 * flag & |
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[65] | 308 | + ( & |
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| 309 | ( km(k,j,i)+km(k+1,j,i) ) * ( e(k+1,j,i)-e(k,j,i) ) * ddzu(k+1) & |
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[2037] | 310 | * rho_air_zw(k) & |
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[65] | 311 | - ( km(k,j,i)+km(k-1,j,i) ) * ( e(k,j,i)-e(k-1,j,i) ) * ddzu(k) & |
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[2037] | 312 | * rho_air_zw(k-1) & |
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[2232] | 313 | ) * ddzw(k) * drho_air(k) * flag & |
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| 314 | - dissipation(k,j) * flag |
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[65] | 315 | |
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[1] | 316 | ENDDO |
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| 317 | ENDDO |
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| 318 | |
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[65] | 319 | ! |
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| 320 | !-- Store dissipation if needed for calculating the sgs particle |
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| 321 | !-- velocities |
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[1065] | 322 | IF ( use_sgs_for_particles .OR. wang_kernel .OR. & |
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[1831] | 323 | collision_turbulence ) THEN |
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[65] | 324 | DO j = nys, nyn |
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[2232] | 325 | DO k = nzb+1, nzt |
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| 326 | diss(k,j,i) = dissipation(k,j) * & |
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| 327 | MERGE( 1.0_wp, 0.0_wp, & |
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| 328 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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[65] | 329 | ENDDO |
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| 330 | ENDDO |
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| 331 | ENDIF |
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[1] | 332 | |
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[65] | 333 | ENDDO |
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| 334 | |
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| 335 | ENDIF |
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| 336 | |
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[1] | 337 | ! |
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[2232] | 338 | !-- Neumann boundary condition for dissipation diss(nzb,:,:) = diss(nzb+1,:,:) |
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[1849] | 339 | IF ( use_sgs_for_particles .OR. wang_kernel .OR. & |
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[1831] | 340 | collision_turbulence ) THEN |
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[2232] | 341 | ! |
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| 342 | !-- Upward facing surfaces |
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| 343 | DO m = 1, bc_h(0)%ns |
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| 344 | i = bc_h(0)%i(m) |
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| 345 | j = bc_h(0)%j(m) |
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| 346 | k = bc_h(0)%k(m) |
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| 347 | diss(k-1,j,i) = diss(k,j,i) |
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[1] | 348 | ENDDO |
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[2232] | 349 | ! |
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| 350 | !-- Downward facing surfaces |
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| 351 | DO m = 1, bc_h(1)%ns |
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| 352 | i = bc_h(1)%i(m) |
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| 353 | j = bc_h(1)%j(m) |
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| 354 | k = bc_h(1)%k(m) |
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| 355 | diss(k+1,j,i) = diss(k,j,i) |
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| 356 | ENDDO |
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| 357 | |
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[1] | 358 | ENDIF |
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| 359 | |
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| 360 | END SUBROUTINE diffusion_e |
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| 361 | |
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| 362 | |
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| 363 | !------------------------------------------------------------------------------! |
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[1682] | 364 | ! Description: |
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| 365 | ! ------------ |
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| 366 | !> Call for grid point i,j |
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[1] | 367 | !------------------------------------------------------------------------------! |
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[1001] | 368 | SUBROUTINE diffusion_e_ij( i, j, var, var_reference ) |
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[1] | 369 | |
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[1320] | 370 | USE arrays_3d, & |
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[2232] | 371 | ONLY: dd2zu, ddzu, ddzw, diss, e, km, l_grid, l_wall, tend, zu, zw,& |
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[2037] | 372 | drho_air, rho_air_zw |
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[1320] | 373 | |
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| 374 | USE control_parameters, & |
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[1831] | 375 | ONLY: atmos_ocean_sign, g, use_single_reference_value, & |
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[1320] | 376 | wall_adjustment, wall_adjustment_factor |
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[1831] | 377 | |
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[1320] | 378 | USE grid_variables, & |
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| 379 | ONLY: ddx2, ddy2 |
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| 380 | |
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| 381 | USE indices, & |
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[2232] | 382 | ONLY: nxlg, nxrg, nyng, nysg, nzb, nzb_max, nzt, wall_flags_0 |
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[1320] | 383 | |
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| 384 | USE kinds |
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[1849] | 385 | |
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| 386 | USE microphysics_mod, & |
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| 387 | ONLY: collision_turbulence |
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| 388 | |
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[1320] | 389 | USE particle_attributes, & |
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| 390 | ONLY: use_sgs_for_particles, wang_kernel |
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[1] | 391 | |
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[2232] | 392 | USE surface_mod, & |
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| 393 | ONLY : bc_h |
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| 394 | |
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[1] | 395 | IMPLICIT NONE |
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| 396 | |
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[2232] | 397 | INTEGER(iwp) :: i !< running index x direction |
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| 398 | INTEGER(iwp) :: j !< running index y direction |
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| 399 | INTEGER(iwp) :: k !< running index z direction |
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| 400 | INTEGER(iwp) :: m !< running index surface elements |
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| 401 | INTEGER(iwp) :: surf_e !< End index of surface elements at (j,i)-gridpoint |
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| 402 | INTEGER(iwp) :: surf_s !< Start index of surface elements at (j,i)-gridpoint |
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| 403 | |
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[1682] | 404 | REAL(wp) :: dvar_dz !< |
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[2232] | 405 | REAL(wp) :: flag !< flag to mask topography |
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[1682] | 406 | REAL(wp) :: l_stable !< |
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| 407 | REAL(wp) :: var_reference !< |
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[1] | 408 | |
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[1010] | 409 | #if defined( __nopointer ) |
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[1682] | 410 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: var !< |
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[1010] | 411 | #else |
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[1682] | 412 | REAL(wp), DIMENSION(:,:,:), POINTER :: var !< |
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[1010] | 413 | #endif |
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[1682] | 414 | REAL(wp), DIMENSION(nzb+1:nzt) :: dissipation !< |
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| 415 | REAL(wp), DIMENSION(nzb+1:nzt) :: l !< |
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| 416 | REAL(wp), DIMENSION(nzb+1:nzt) :: ll !< |
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[1] | 417 | |
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| 418 | ! |
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| 419 | !-- Calculate the mixing length (for dissipation) |
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[2232] | 420 | DO k = nzb+1, nzt |
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| 421 | ! |
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| 422 | !-- Predetermine flag to mask topography |
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| 423 | flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j,i), 0 ) ) |
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| 424 | |
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[97] | 425 | dvar_dz = atmos_ocean_sign * & |
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| 426 | ( var(k+1,j,i) - var(k-1,j,i) ) * dd2zu(k) |
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[1340] | 427 | IF ( dvar_dz > 0.0_wp ) THEN |
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[1179] | 428 | IF ( use_single_reference_value ) THEN |
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[1340] | 429 | l_stable = 0.76_wp * SQRT( e(k,j,i) ) / & |
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| 430 | SQRT( g / var_reference * dvar_dz ) + 1E-5_wp |
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[57] | 431 | ELSE |
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[1340] | 432 | l_stable = 0.76_wp * SQRT( e(k,j,i) ) / & |
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| 433 | SQRT( g / var(k,j,i) * dvar_dz ) + 1E-5_wp |
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[57] | 434 | ENDIF |
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[1] | 435 | ELSE |
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| 436 | l_stable = l_grid(k) |
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| 437 | ENDIF |
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| 438 | ! |
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| 439 | !-- Adjustment of the mixing length |
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| 440 | IF ( wall_adjustment ) THEN |
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[2232] | 441 | l(k) = MIN( wall_adjustment_factor * l_wall(k,j,i), & |
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| 442 | l_grid(k), l_stable ) |
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| 443 | ll(k) = MIN( wall_adjustment_factor * l_wall(k,j,i), l_grid(k) ) |
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[1] | 444 | ELSE |
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| 445 | l(k) = MIN( l_grid(k), l_stable ) |
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| 446 | ll(k) = l_grid(k) |
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| 447 | ENDIF |
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| 448 | ! |
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| 449 | !-- Calculate the tendency term |
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[2232] | 450 | dissipation(k) = ( 0.19_wp + 0.74_wp * l(k) / ll(k) ) * e(k,j,i) * & |
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[1340] | 451 | SQRT( e(k,j,i) ) / l(k) |
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[1] | 452 | |
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[2232] | 453 | tend(k,j,i) = tend(k,j,i) & |
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| 454 | + ( & |
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| 455 | ( km(k,j,i)+km(k,j,i+1) ) * ( e(k,j,i+1)-e(k,j,i) ) & |
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| 456 | - ( km(k,j,i)+km(k,j,i-1) ) * ( e(k,j,i)-e(k,j,i-1) ) & |
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| 457 | ) * ddx2 * flag & |
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| 458 | + ( & |
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| 459 | ( km(k,j,i)+km(k,j+1,i) ) * ( e(k,j+1,i)-e(k,j,i) ) & |
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| 460 | - ( km(k,j,i)+km(k,j-1,i) ) * ( e(k,j,i)-e(k,j-1,i) ) & |
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| 461 | ) * ddy2 * flag & |
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| 462 | + ( & |
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| 463 | ( km(k,j,i)+km(k+1,j,i) ) * ( e(k+1,j,i)-e(k,j,i) ) * ddzu(k+1) & |
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| 464 | * rho_air_zw(k) & |
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| 465 | - ( km(k,j,i)+km(k-1,j,i) ) * ( e(k,j,i)-e(k-1,j,i) ) * ddzu(k) & |
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| 466 | * rho_air_zw(k-1) & |
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| 467 | ) * ddzw(k) * drho_air(k) * flag & |
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| 468 | - dissipation(k) * flag |
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[1] | 469 | |
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| 470 | ENDDO |
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| 471 | |
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| 472 | ! |
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| 473 | !-- Store dissipation if needed for calculating the sgs particle velocities |
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[1849] | 474 | IF ( use_sgs_for_particles .OR. wang_kernel .OR. & |
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| 475 | collision_turbulence ) THEN |
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[2232] | 476 | DO k = nzb+1, nzt |
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| 477 | diss(k,j,i) = dissipation(k) * & |
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| 478 | MERGE( 1.0_wp, 0.0_wp, & |
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| 479 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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[1] | 480 | ENDDO |
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| 481 | ! |
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[2232] | 482 | !-- Neumann boundary condition for dissipation diss(nzb,:,:) = diss(nzb+1,:,:) |
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| 483 | !-- For each surface type determine start and end index (in case of elevated |
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| 484 | !-- toopography several up/downward facing surfaces may exist. |
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| 485 | surf_s = bc_h(0)%start_index(j,i) |
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| 486 | surf_e = bc_h(0)%end_index(j,i) |
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| 487 | DO m = surf_s, surf_e |
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| 488 | k = bc_h(0)%k(m) |
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| 489 | diss(k-1,j,i) = diss(k,j,i) |
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| 490 | ENDDO |
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| 491 | ! |
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| 492 | !-- Downward facing surfaces |
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| 493 | surf_s = bc_h(1)%start_index(j,i) |
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| 494 | surf_e = bc_h(1)%end_index(j,i) |
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| 495 | DO m = surf_s, surf_e |
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| 496 | k = bc_h(1)%k(m) |
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| 497 | diss(k+1,j,i) = diss(k,j,i) |
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| 498 | ENDDO |
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[1] | 499 | ENDIF |
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| 500 | |
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| 501 | END SUBROUTINE diffusion_e_ij |
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| 502 | |
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| 503 | END MODULE diffusion_e_mod |
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