| 1 | !> @file diffusion_w.f90 |
|---|
| 2 | !------------------------------------------------------------------------------! |
|---|
| 3 | ! This file is part of the PALM model system. |
|---|
| 4 | ! |
|---|
| 5 | ! PALM is free software: you can redistribute it and/or modify it under the |
|---|
| 6 | ! terms of the GNU General Public License as published by the Free Software |
|---|
| 7 | ! Foundation, either version 3 of the License, or (at your option) any later |
|---|
| 8 | ! version. |
|---|
| 9 | ! |
|---|
| 10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
|---|
| 11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
|---|
| 12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
|---|
| 13 | ! |
|---|
| 14 | ! You should have received a copy of the GNU General Public License along with |
|---|
| 15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
|---|
| 16 | ! |
|---|
| 17 | ! Copyright 1997-2019 Leibniz Universitaet Hannover |
|---|
| 18 | !------------------------------------------------------------------------------! |
|---|
| 19 | ! |
|---|
| 20 | ! Current revisions: |
|---|
| 21 | ! ----------------- |
|---|
| 22 | ! |
|---|
| 23 | ! |
|---|
| 24 | ! Former revisions: |
|---|
| 25 | ! ----------------- |
|---|
| 26 | ! $Id: diffusion_w.f90 4182 2019-08-22 15:20:23Z gronemeier $ |
|---|
| 27 | ! Corrected "Former revisions" section |
|---|
| 28 | ! |
|---|
| 29 | ! 3655 2019-01-07 16:51:22Z knoop |
|---|
| 30 | ! OpenACC port for SPEC |
|---|
| 31 | ! |
|---|
| 32 | ! Revision 1.1 1997/09/12 06:24:11 raasch |
|---|
| 33 | ! Initial revision |
|---|
| 34 | ! |
|---|
| 35 | ! |
|---|
| 36 | ! Description: |
|---|
| 37 | ! ------------ |
|---|
| 38 | !> Diffusion term of the w-component |
|---|
| 39 | !------------------------------------------------------------------------------! |
|---|
| 40 | MODULE diffusion_w_mod |
|---|
| 41 | |
|---|
| 42 | |
|---|
| 43 | PRIVATE |
|---|
| 44 | PUBLIC diffusion_w |
|---|
| 45 | |
|---|
| 46 | INTERFACE diffusion_w |
|---|
| 47 | MODULE PROCEDURE diffusion_w |
|---|
| 48 | MODULE PROCEDURE diffusion_w_ij |
|---|
| 49 | END INTERFACE diffusion_w |
|---|
| 50 | |
|---|
| 51 | CONTAINS |
|---|
| 52 | |
|---|
| 53 | |
|---|
| 54 | !------------------------------------------------------------------------------! |
|---|
| 55 | ! Description: |
|---|
| 56 | ! ------------ |
|---|
| 57 | !> Call for all grid points |
|---|
| 58 | !------------------------------------------------------------------------------! |
|---|
| 59 | SUBROUTINE diffusion_w |
|---|
| 60 | |
|---|
| 61 | USE arrays_3d, & |
|---|
| 62 | ONLY : ddzu, ddzw, km, tend, u, v, w, drho_air_zw, rho_air |
|---|
| 63 | |
|---|
| 64 | USE grid_variables, & |
|---|
| 65 | ONLY : ddx, ddy |
|---|
| 66 | |
|---|
| 67 | USE indices, & |
|---|
| 68 | ONLY : nxl, nxr, nyn, nys, nzb, nzt, wall_flags_0 |
|---|
| 69 | |
|---|
| 70 | USE kinds |
|---|
| 71 | |
|---|
| 72 | USE surface_mod, & |
|---|
| 73 | ONLY : surf_def_v, surf_lsm_v, surf_usm_v |
|---|
| 74 | |
|---|
| 75 | IMPLICIT NONE |
|---|
| 76 | |
|---|
| 77 | INTEGER(iwp) :: i !< running index x direction |
|---|
| 78 | INTEGER(iwp) :: j !< running index y direction |
|---|
| 79 | INTEGER(iwp) :: k !< running index z direction |
|---|
| 80 | INTEGER(iwp) :: l !< running index of surface type, south- or north-facing wall |
|---|
| 81 | INTEGER(iwp) :: m !< running index surface elements |
|---|
| 82 | INTEGER(iwp) :: surf_e !< End index of surface elements at (j,i)-gridpoint |
|---|
| 83 | INTEGER(iwp) :: surf_s !< Start index of surface elements at (j,i)-gridpoint |
|---|
| 84 | |
|---|
| 85 | REAL(wp) :: flag !< flag to mask topography grid points |
|---|
| 86 | REAL(wp) :: kmxm !< diffusion coefficient on leftward side of the w-gridbox - interpolated onto xu-y grid |
|---|
| 87 | REAL(wp) :: kmxp !<diffusion coefficient on rightward side of the w-gridbox - interpolated onto xu-y grid |
|---|
| 88 | REAL(wp) :: kmym !< diffusion coefficient on southward side of the w-gridbox - interpolated onto x-yv grid |
|---|
| 89 | REAL(wp) :: kmyp !< diffusion coefficient on northward side of the w-gridbox - interpolated onto x-yv grid |
|---|
| 90 | REAL(wp) :: mask_west !< flag to mask vertical wall west of the grid point |
|---|
| 91 | REAL(wp) :: mask_east !< flag to mask vertical wall east of the grid point |
|---|
| 92 | REAL(wp) :: mask_south !< flag to mask vertical wall south of the grid point |
|---|
| 93 | REAL(wp) :: mask_north !< flag to mask vertical wall north of the grid point |
|---|
| 94 | |
|---|
| 95 | |
|---|
| 96 | |
|---|
| 97 | !$ACC PARALLEL LOOP COLLAPSE(2) PRIVATE(i, j, k, l, m) & |
|---|
| 98 | !$ACC PRIVATE(surf_e, surf_s, flag, kmxm, kmxp, kmym, kmyp) & |
|---|
| 99 | !$ACC PRIVATE(mask_west, mask_east, mask_south, mask_north) & |
|---|
| 100 | !$ACC PRESENT(wall_flags_0, km) & |
|---|
| 101 | !$ACC PRESENT(u, v, w) & |
|---|
| 102 | !$ACC PRESENT(ddzu, ddzw, rho_air, drho_air_zw) & |
|---|
| 103 | !$ACC PRESENT(surf_def_v(0:3)) & |
|---|
| 104 | !$ACC PRESENT(surf_lsm_v(0:3)) & |
|---|
| 105 | !$ACC PRESENT(surf_usm_v(0:3)) & |
|---|
| 106 | !$ACC PRESENT(tend) |
|---|
| 107 | DO i = nxl, nxr |
|---|
| 108 | DO j = nys, nyn |
|---|
| 109 | DO k = nzb+1, nzt-1 |
|---|
| 110 | ! |
|---|
| 111 | !-- Predetermine flag to mask topography and wall-bounded grid points. |
|---|
| 112 | flag = MERGE( 1.0_wp, 0.0_wp, & |
|---|
| 113 | BTEST( wall_flags_0(k,j,i), 3 ) ) |
|---|
| 114 | mask_east = MERGE( 1.0_wp, 0.0_wp, & |
|---|
| 115 | BTEST( wall_flags_0(k,j,i+1), 3 ) ) |
|---|
| 116 | mask_west = MERGE( 1.0_wp, 0.0_wp, & |
|---|
| 117 | BTEST( wall_flags_0(k,j,i-1), 3 ) ) |
|---|
| 118 | mask_south = MERGE( 1.0_wp, 0.0_wp, & |
|---|
| 119 | BTEST( wall_flags_0(k,j-1,i), 3 ) ) |
|---|
| 120 | mask_north = MERGE( 1.0_wp, 0.0_wp, & |
|---|
| 121 | BTEST( wall_flags_0(k,j+1,i), 3 ) ) |
|---|
| 122 | ! |
|---|
| 123 | !-- Interpolate eddy diffusivities on staggered gridpoints |
|---|
| 124 | kmxp = 0.25_wp * ( km(k,j,i) + km(k,j,i+1) + & |
|---|
| 125 | km(k+1,j,i) + km(k+1,j,i+1) ) |
|---|
| 126 | kmxm = 0.25_wp * ( km(k,j,i) + km(k,j,i-1) + & |
|---|
| 127 | km(k+1,j,i) + km(k+1,j,i-1) ) |
|---|
| 128 | kmyp = 0.25_wp * ( km(k,j,i) + km(k+1,j,i) + & |
|---|
| 129 | km(k,j+1,i) + km(k+1,j+1,i) ) |
|---|
| 130 | kmym = 0.25_wp * ( km(k,j,i) + km(k+1,j,i) + & |
|---|
| 131 | km(k,j-1,i) + km(k+1,j-1,i) ) |
|---|
| 132 | |
|---|
| 133 | tend(k,j,i) = tend(k,j,i) & |
|---|
| 134 | + ( mask_east * kmxp * ( & |
|---|
| 135 | ( w(k,j,i+1) - w(k,j,i) ) * ddx & |
|---|
| 136 | + ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) & |
|---|
| 137 | ) & |
|---|
| 138 | - mask_west * kmxm * ( & |
|---|
| 139 | ( w(k,j,i) - w(k,j,i-1) ) * ddx & |
|---|
| 140 | + ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) & |
|---|
| 141 | ) & |
|---|
| 142 | ) * ddx * flag & |
|---|
| 143 | + ( mask_north * kmyp * ( & |
|---|
| 144 | ( w(k,j+1,i) - w(k,j,i) ) * ddy & |
|---|
| 145 | + ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) & |
|---|
| 146 | ) & |
|---|
| 147 | - mask_south * kmym * ( & |
|---|
| 148 | ( w(k,j,i) - w(k,j-1,i) ) * ddy & |
|---|
| 149 | + ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) & |
|---|
| 150 | ) & |
|---|
| 151 | ) * ddy * flag & |
|---|
| 152 | + 2.0_wp * ( & |
|---|
| 153 | km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) & |
|---|
| 154 | * rho_air(k+1) & |
|---|
| 155 | - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) & |
|---|
| 156 | * rho_air(k) & |
|---|
| 157 | ) * ddzu(k+1) * drho_air_zw(k) * flag |
|---|
| 158 | ENDDO |
|---|
| 159 | |
|---|
| 160 | ! |
|---|
| 161 | !-- Add horizontal momentum flux v'w' at north- (l=0) and south-facing (l=1) |
|---|
| 162 | !-- surfaces. Note, in the the flat case, loops won't be entered as |
|---|
| 163 | !-- start_index > end_index. Furtermore, note, no vertical natural surfaces |
|---|
| 164 | !-- so far. |
|---|
| 165 | !-- Default-type surfaces |
|---|
| 166 | DO l = 0, 1 |
|---|
| 167 | surf_s = surf_def_v(l)%start_index(j,i) |
|---|
| 168 | surf_e = surf_def_v(l)%end_index(j,i) |
|---|
| 169 | DO m = surf_s, surf_e |
|---|
| 170 | k = surf_def_v(l)%k(m) |
|---|
| 171 | tend(k,j,i) = tend(k,j,i) + & |
|---|
| 172 | surf_def_v(l)%mom_flux_w(m) * ddy |
|---|
| 173 | ENDDO |
|---|
| 174 | ENDDO |
|---|
| 175 | ! |
|---|
| 176 | !-- Natural-type surfaces |
|---|
| 177 | DO l = 0, 1 |
|---|
| 178 | surf_s = surf_lsm_v(l)%start_index(j,i) |
|---|
| 179 | surf_e = surf_lsm_v(l)%end_index(j,i) |
|---|
| 180 | DO m = surf_s, surf_e |
|---|
| 181 | k = surf_lsm_v(l)%k(m) |
|---|
| 182 | tend(k,j,i) = tend(k,j,i) + & |
|---|
| 183 | surf_lsm_v(l)%mom_flux_w(m) * ddy |
|---|
| 184 | ENDDO |
|---|
| 185 | ENDDO |
|---|
| 186 | ! |
|---|
| 187 | !-- Urban-type surfaces |
|---|
| 188 | DO l = 0, 1 |
|---|
| 189 | surf_s = surf_usm_v(l)%start_index(j,i) |
|---|
| 190 | surf_e = surf_usm_v(l)%end_index(j,i) |
|---|
| 191 | DO m = surf_s, surf_e |
|---|
| 192 | k = surf_usm_v(l)%k(m) |
|---|
| 193 | tend(k,j,i) = tend(k,j,i) + & |
|---|
| 194 | surf_usm_v(l)%mom_flux_w(m) * ddy |
|---|
| 195 | ENDDO |
|---|
| 196 | ENDDO |
|---|
| 197 | ! |
|---|
| 198 | !-- Add horizontal momentum flux u'w' at east- (l=2) and west-facing (l=3) |
|---|
| 199 | !-- surface. |
|---|
| 200 | !-- Default-type surfaces |
|---|
| 201 | DO l = 2, 3 |
|---|
| 202 | surf_s = surf_def_v(l)%start_index(j,i) |
|---|
| 203 | surf_e = surf_def_v(l)%end_index(j,i) |
|---|
| 204 | DO m = surf_s, surf_e |
|---|
| 205 | k = surf_def_v(l)%k(m) |
|---|
| 206 | tend(k,j,i) = tend(k,j,i) + & |
|---|
| 207 | surf_def_v(l)%mom_flux_w(m) * ddx |
|---|
| 208 | ENDDO |
|---|
| 209 | ENDDO |
|---|
| 210 | ! |
|---|
| 211 | !-- Natural-type surfaces |
|---|
| 212 | DO l = 2, 3 |
|---|
| 213 | surf_s = surf_lsm_v(l)%start_index(j,i) |
|---|
| 214 | surf_e = surf_lsm_v(l)%end_index(j,i) |
|---|
| 215 | DO m = surf_s, surf_e |
|---|
| 216 | k = surf_lsm_v(l)%k(m) |
|---|
| 217 | tend(k,j,i) = tend(k,j,i) + & |
|---|
| 218 | surf_lsm_v(l)%mom_flux_w(m) * ddx |
|---|
| 219 | ENDDO |
|---|
| 220 | ENDDO |
|---|
| 221 | ! |
|---|
| 222 | !-- Urban-type surfaces |
|---|
| 223 | DO l = 2, 3 |
|---|
| 224 | surf_s = surf_usm_v(l)%start_index(j,i) |
|---|
| 225 | surf_e = surf_usm_v(l)%end_index(j,i) |
|---|
| 226 | DO m = surf_s, surf_e |
|---|
| 227 | k = surf_usm_v(l)%k(m) |
|---|
| 228 | tend(k,j,i) = tend(k,j,i) + & |
|---|
| 229 | surf_usm_v(l)%mom_flux_w(m) * ddx |
|---|
| 230 | ENDDO |
|---|
| 231 | ENDDO |
|---|
| 232 | |
|---|
| 233 | ENDDO |
|---|
| 234 | ENDDO |
|---|
| 235 | |
|---|
| 236 | END SUBROUTINE diffusion_w |
|---|
| 237 | |
|---|
| 238 | |
|---|
| 239 | !------------------------------------------------------------------------------! |
|---|
| 240 | ! Description: |
|---|
| 241 | ! ------------ |
|---|
| 242 | !> Call for grid point i,j |
|---|
| 243 | !------------------------------------------------------------------------------! |
|---|
| 244 | SUBROUTINE diffusion_w_ij( i, j ) |
|---|
| 245 | |
|---|
| 246 | USE arrays_3d, & |
|---|
| 247 | ONLY : ddzu, ddzw, km, tend, u, v, w, drho_air_zw, rho_air |
|---|
| 248 | |
|---|
| 249 | USE grid_variables, & |
|---|
| 250 | ONLY : ddx, ddy |
|---|
| 251 | |
|---|
| 252 | USE indices, & |
|---|
| 253 | ONLY : nzb, nzt, wall_flags_0 |
|---|
| 254 | |
|---|
| 255 | USE kinds |
|---|
| 256 | |
|---|
| 257 | USE surface_mod, & |
|---|
| 258 | ONLY : surf_def_v, surf_lsm_v, surf_usm_v |
|---|
| 259 | |
|---|
| 260 | IMPLICIT NONE |
|---|
| 261 | |
|---|
| 262 | |
|---|
| 263 | INTEGER(iwp) :: i !< running index x direction |
|---|
| 264 | INTEGER(iwp) :: j !< running index y direction |
|---|
| 265 | INTEGER(iwp) :: k !< running index z direction |
|---|
| 266 | INTEGER(iwp) :: l !< running index of surface type, south- or north-facing wall |
|---|
| 267 | INTEGER(iwp) :: m !< running index surface elements |
|---|
| 268 | INTEGER(iwp) :: surf_e !< End index of surface elements at (j,i)-gridpoint |
|---|
| 269 | INTEGER(iwp) :: surf_s !< Start index of surface elements at (j,i)-gridpoint |
|---|
| 270 | |
|---|
| 271 | REAL(wp) :: flag !< flag to mask topography grid points |
|---|
| 272 | REAL(wp) :: kmxm !< diffusion coefficient on leftward side of the w-gridbox - interpolated onto xu-y grid |
|---|
| 273 | REAL(wp) :: kmxp !< diffusion coefficient on rightward side of the w-gridbox - interpolated onto xu-y grid |
|---|
| 274 | REAL(wp) :: kmym !< diffusion coefficient on southward side of the w-gridbox - interpolated onto x-yv grid |
|---|
| 275 | REAL(wp) :: kmyp !< diffusion coefficient on northward side of the w-gridbox - interpolated onto x-yv grid |
|---|
| 276 | REAL(wp) :: mask_west !< flag to mask vertical wall west of the grid point |
|---|
| 277 | REAL(wp) :: mask_east !< flag to mask vertical wall east of the grid point |
|---|
| 278 | REAL(wp) :: mask_south !< flag to mask vertical wall south of the grid point |
|---|
| 279 | REAL(wp) :: mask_north !< flag to mask vertical wall north of the grid point |
|---|
| 280 | |
|---|
| 281 | |
|---|
| 282 | DO k = nzb+1, nzt-1 |
|---|
| 283 | ! |
|---|
| 284 | !-- Predetermine flag to mask topography and wall-bounded grid points. |
|---|
| 285 | flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j,i), 3 ) ) |
|---|
| 286 | mask_east = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j,i+1), 3 ) ) |
|---|
| 287 | mask_west = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j,i-1), 3 ) ) |
|---|
| 288 | mask_south = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j-1,i), 3 ) ) |
|---|
| 289 | mask_north = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j+1,i), 3 ) ) |
|---|
| 290 | ! |
|---|
| 291 | !-- Interpolate eddy diffusivities on staggered gridpoints |
|---|
| 292 | kmxp = 0.25_wp * ( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) ) |
|---|
| 293 | kmxm = 0.25_wp * ( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) ) |
|---|
| 294 | kmyp = 0.25_wp * ( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) ) |
|---|
| 295 | kmym = 0.25_wp * ( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) ) |
|---|
| 296 | |
|---|
| 297 | tend(k,j,i) = tend(k,j,i) & |
|---|
| 298 | + ( mask_east * kmxp * ( & |
|---|
| 299 | ( w(k,j,i+1) - w(k,j,i) ) * ddx & |
|---|
| 300 | + ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) & |
|---|
| 301 | ) & |
|---|
| 302 | - mask_west * kmxm * ( & |
|---|
| 303 | ( w(k,j,i) - w(k,j,i-1) ) * ddx & |
|---|
| 304 | + ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) & |
|---|
| 305 | ) & |
|---|
| 306 | ) * ddx * flag & |
|---|
| 307 | + ( mask_north * kmyp * ( & |
|---|
| 308 | ( w(k,j+1,i) - w(k,j,i) ) * ddy & |
|---|
| 309 | + ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) & |
|---|
| 310 | ) & |
|---|
| 311 | - mask_south * kmym * ( & |
|---|
| 312 | ( w(k,j,i) - w(k,j-1,i) ) * ddy & |
|---|
| 313 | + ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) & |
|---|
| 314 | ) & |
|---|
| 315 | ) * ddy * flag & |
|---|
| 316 | + 2.0_wp * ( & |
|---|
| 317 | km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) & |
|---|
| 318 | * rho_air(k+1) & |
|---|
| 319 | - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) & |
|---|
| 320 | * rho_air(k) & |
|---|
| 321 | ) * ddzu(k+1) * drho_air_zw(k) * flag |
|---|
| 322 | ENDDO |
|---|
| 323 | ! |
|---|
| 324 | !-- Add horizontal momentum flux v'w' at north- (l=0) and south-facing (l=1) |
|---|
| 325 | !-- surfaces. Note, in the the flat case, loops won't be entered as |
|---|
| 326 | !-- start_index > end_index. Furtermore, note, no vertical natural surfaces |
|---|
| 327 | !-- so far. |
|---|
| 328 | !-- Default-type surfaces |
|---|
| 329 | DO l = 0, 1 |
|---|
| 330 | surf_s = surf_def_v(l)%start_index(j,i) |
|---|
| 331 | surf_e = surf_def_v(l)%end_index(j,i) |
|---|
| 332 | DO m = surf_s, surf_e |
|---|
| 333 | k = surf_def_v(l)%k(m) |
|---|
| 334 | tend(k,j,i) = tend(k,j,i) + & |
|---|
| 335 | surf_def_v(l)%mom_flux_w(m) * ddy |
|---|
| 336 | ENDDO |
|---|
| 337 | ENDDO |
|---|
| 338 | ! |
|---|
| 339 | !-- Natural-type surfaces |
|---|
| 340 | DO l = 0, 1 |
|---|
| 341 | surf_s = surf_lsm_v(l)%start_index(j,i) |
|---|
| 342 | surf_e = surf_lsm_v(l)%end_index(j,i) |
|---|
| 343 | DO m = surf_s, surf_e |
|---|
| 344 | k = surf_lsm_v(l)%k(m) |
|---|
| 345 | tend(k,j,i) = tend(k,j,i) + & |
|---|
| 346 | surf_lsm_v(l)%mom_flux_w(m) * ddy |
|---|
| 347 | ENDDO |
|---|
| 348 | ENDDO |
|---|
| 349 | ! |
|---|
| 350 | !-- Urban-type surfaces |
|---|
| 351 | DO l = 0, 1 |
|---|
| 352 | surf_s = surf_usm_v(l)%start_index(j,i) |
|---|
| 353 | surf_e = surf_usm_v(l)%end_index(j,i) |
|---|
| 354 | DO m = surf_s, surf_e |
|---|
| 355 | k = surf_usm_v(l)%k(m) |
|---|
| 356 | tend(k,j,i) = tend(k,j,i) + & |
|---|
| 357 | surf_usm_v(l)%mom_flux_w(m) * ddy |
|---|
| 358 | ENDDO |
|---|
| 359 | ENDDO |
|---|
| 360 | ! |
|---|
| 361 | !-- Add horizontal momentum flux u'w' at east- (l=2) and west-facing (l=3) |
|---|
| 362 | !-- surfaces. |
|---|
| 363 | !-- Default-type surfaces |
|---|
| 364 | DO l = 2, 3 |
|---|
| 365 | surf_s = surf_def_v(l)%start_index(j,i) |
|---|
| 366 | surf_e = surf_def_v(l)%end_index(j,i) |
|---|
| 367 | DO m = surf_s, surf_e |
|---|
| 368 | k = surf_def_v(l)%k(m) |
|---|
| 369 | tend(k,j,i) = tend(k,j,i) + & |
|---|
| 370 | surf_def_v(l)%mom_flux_w(m) * ddx |
|---|
| 371 | ENDDO |
|---|
| 372 | ENDDO |
|---|
| 373 | ! |
|---|
| 374 | !-- Natural-type surfaces |
|---|
| 375 | DO l = 2, 3 |
|---|
| 376 | surf_s = surf_lsm_v(l)%start_index(j,i) |
|---|
| 377 | surf_e = surf_lsm_v(l)%end_index(j,i) |
|---|
| 378 | DO m = surf_s, surf_e |
|---|
| 379 | k = surf_lsm_v(l)%k(m) |
|---|
| 380 | tend(k,j,i) = tend(k,j,i) + & |
|---|
| 381 | surf_lsm_v(l)%mom_flux_w(m) * ddx |
|---|
| 382 | ENDDO |
|---|
| 383 | ENDDO |
|---|
| 384 | ! |
|---|
| 385 | !-- Urban-type surfaces |
|---|
| 386 | DO l = 2, 3 |
|---|
| 387 | surf_s = surf_usm_v(l)%start_index(j,i) |
|---|
| 388 | surf_e = surf_usm_v(l)%end_index(j,i) |
|---|
| 389 | DO m = surf_s, surf_e |
|---|
| 390 | k = surf_usm_v(l)%k(m) |
|---|
| 391 | tend(k,j,i) = tend(k,j,i) + & |
|---|
| 392 | surf_usm_v(l)%mom_flux_w(m) * ddx |
|---|
| 393 | ENDDO |
|---|
| 394 | ENDDO |
|---|
| 395 | |
|---|
| 396 | |
|---|
| 397 | END SUBROUTINE diffusion_w_ij |
|---|
| 398 | |
|---|
| 399 | END MODULE diffusion_w_mod |
|---|
