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source: palm/trunk/SOURCE/diffusion_w.f90 @ 1873

Last change on this file since 1873 was 1873, checked in by maronga, 8 years ago
revised renaming of modules
Property svn:keywords set to `Id`
File size: 22.8 KB

Rev	Line
[1873]	1	!> @file diffusion_w.f90
[1036]	2	!--------------------------------------------------------------------------------!
	3	! This file is part of PALM.
	4	!
	5	! PALM is free software: you can redistribute it and/or modify it under the terms
	6	! of the GNU General Public License as published by the Free Software Foundation,
	7	! either version 3 of the License, or (at your option) any later version.
	8	!
	9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
	10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	12	!
	13	! You should have received a copy of the GNU General Public License along with
	14	! PALM. If not, see <http://www.gnu.org/licenses/>.
	15	!
[1818]	16	! Copyright 1997-2016 Leibniz Universitaet Hannover
[1036]	17	!--------------------------------------------------------------------------------!
	18	!
[484]	19	! Current revisions:
[1]	20	! -----------------
[1873]	21	! Module renamed (removed _mod)
[1341]	22	!
[1683]	23	!
[1321]	24	! Former revisions:
	25	! -----------------
	26	! $Id: diffusion_w.f90 1873 2016-04-18 14:50:06Z maronga $
	27	!
[1851]	28	! 1850 2016-04-08 13:29:27Z maronga
	29	! Module renamed
	30	!
	31	!
[1683]	32	! 1682 2015-10-07 23:56:08Z knoop
	33	! Code annotations made doxygen readable
	34	!
[1375]	35	! 1374 2014-04-25 12:55:07Z raasch
	36	! vsws + vswst removed from acc-present-list
	37	!
[1354]	38	! 1353 2014-04-08 15:21:23Z heinze
	39	! REAL constants provided with KIND-attribute
	40	!
[1341]	41	! 1340 2014-03-25 19:45:13Z kanani
	42	! REAL constants defined as wp-kind
	43	!
[1323]	44	! 1322 2014-03-20 16:38:49Z raasch
	45	! REAL constants defined as wp-kind
	46	!
[1321]	47	! 1320 2014-03-20 08:40:49Z raasch
[1320]	48	! ONLY-attribute added to USE-statements,
	49	! kind-parameters added to all INTEGER and REAL declaration statements,
	50	! kinds are defined in new module kinds,
	51	! revision history before 2012 removed,
	52	! comment fields (!:) to be used for variable explanations added to
	53	! all variable declaration statements
[1]	54	!
[1258]	55	! 1257 2013-11-08 15:18:40Z raasch
	56	! openacc loop and loop vector clauses removed, declare create moved after
	57	! the FORTRAN declaration statement
	58	!
[1132]	59	! 1128 2013-04-12 06:19:32Z raasch
	60	! loop index bounds in accelerator version replaced by i_left, i_right, j_south,
	61	! j_north
	62	!
[1037]	63	! 1036 2012-10-22 13:43:42Z raasch
	64	! code put under GPL (PALM 3.9)
	65	!
[1017]	66	! 1015 2012-09-27 09:23:24Z raasch
	67	! accelerator version (*_acc) added
	68	!
[1002]	69	! 1001 2012-09-13 14:08:46Z raasch
	70	! arrays comunicated by module instead of parameter list
	71	!
[979]	72	! 978 2012-08-09 08:28:32Z fricke
	73	! outflow damping layer removed
	74	! kmxm_x/_z and kmxp_x/_z change to kmxm and kmxp
	75	! kmym_y/_z and kmyp_y/_z change to kmym and kmyp
	76	!
[1]	77	! Revision 1.1 1997/09/12 06:24:11 raasch
	78	! Initial revision
	79	!
	80	!
	81	! Description:
	82	! ------------
[1682]	83	!> Diffusion term of the w-component
[1]	84	!------------------------------------------------------------------------------!
[1682]	85	MODULE diffusion_w_mod
	86
[1]	87
[1320]	88	USE wall_fluxes_mod, &
	89	ONLY : wall_fluxes, wall_fluxes_acc
[56]	90
[1]	91	PRIVATE
[1015]	92	PUBLIC diffusion_w, diffusion_w_acc
[1]	93
	94	INTERFACE diffusion_w
	95	MODULE PROCEDURE diffusion_w
	96	MODULE PROCEDURE diffusion_w_ij
	97	END INTERFACE diffusion_w
	98
[1015]	99	INTERFACE diffusion_w_acc
	100	MODULE PROCEDURE diffusion_w_acc
	101	END INTERFACE diffusion_w_acc
	102
[1]	103	CONTAINS
	104
	105
	106	!------------------------------------------------------------------------------!
[1682]	107	! Description:
	108	! ------------
	109	!> Call for all grid points
[1]	110	!------------------------------------------------------------------------------!
[1001]	111	SUBROUTINE diffusion_w
[1]	112
[1320]	113	USE arrays_3d, &
	114	ONLY : ddzu, ddzw, km, tend, u, v, w
	115
	116	USE control_parameters, &
	117	ONLY : topography
	118
	119	USE grid_variables, &
	120	ONLY : ddx, ddy, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y
	121
	122	USE indices, &
	123	ONLY : nxl, nxr, nyn, nys, nzb, nzb_w_inner, nzb_w_outer, nzt
	124
	125	USE kinds
[1]	126
	127	IMPLICIT NONE
	128
[1682]	129	INTEGER(iwp) :: i !<
	130	INTEGER(iwp) :: j !<
	131	INTEGER(iwp) :: k !<
[1320]	132
[1682]	133	REAL(wp) :: kmxm !<
	134	REAL(wp) :: kmxp !<
	135	REAL(wp) :: kmym !<
	136	REAL(wp) :: kmyp !<
[1001]	137
[1682]	138	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsus !<
	139	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsvs !<
[1]	140
	141
[56]	142	!
	143	!-- First calculate horizontal momentum flux w'u' and/or w'v' at vertical
	144	!-- walls, if neccessary
	145	IF ( topography /= 'flat' ) THEN
[1320]	146	CALL wall_fluxes( wsus, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp, nzb_w_inner, &
[56]	147	nzb_w_outer, wall_w_x )
[1320]	148	CALL wall_fluxes( wsvs, 0.0_wp, 0.0_wp, 1.0_wp, 0.0_wp, nzb_w_inner, &
[56]	149	nzb_w_outer, wall_w_y )
	150	ENDIF
	151
[1]	152	DO i = nxl, nxr
	153	DO j = nys, nyn
	154	DO k = nzb_w_outer(j,i)+1, nzt-1
	155	!
	156	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	157	kmxp = 0.25_wp * &
[978]	158	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	159	kmxm = 0.25_wp * &
[978]	160	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	161	kmyp = 0.25_wp * &
[978]	162	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	163	kmym = 0.25_wp * &
[978]	164	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
[1]	165
	166	tend(k,j,i) = tend(k,j,i) &
[978]	167	& + ( kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	168	& + kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	169	& - kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	170	& - kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	171	& ) * ddx &
[978]	172	& + ( kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	173	& + kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	174	& - kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	175	& - kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	176	& ) * ddy &
[1322]	177	& + 2.0_wp * ( &
[1]	178	& km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	179	& - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	180	& ) * ddzu(k+1)
[1]	181	ENDDO
	182
	183	!
	184	!-- Wall functions at all vertical walls, where necessary
[1340]	185	IF ( wall_w_x(j,i) /= 0.0_wp .OR. wall_w_y(j,i) /= 0.0_wp ) THEN
[51]	186
[1]	187	DO k = nzb_w_inner(j,i)+1, nzb_w_outer(j,i)
	188	!
	189	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	190	kmxp = 0.25_wp * &
[978]	191	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	192	kmxm = 0.25_wp * &
[978]	193	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	194	kmyp = 0.25_wp * &
[978]	195	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	196	kmym = 0.25_wp * &
[978]	197	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
[1]	198
	199	tend(k,j,i) = tend(k,j,i) &
	200	+ ( fwxp(j,i) * ( &
[978]	201	kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	202	+ kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
[1]	203	) &
	204	- fwxm(j,i) * ( &
[978]	205	kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	206	+ kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	207	) &
[56]	208	+ wall_w_x(j,i) * wsus(k,j,i) &
[1]	209	) * ddx &
	210	+ ( fwyp(j,i) * ( &
[978]	211	kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	212	+ kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
[1]	213	) &
	214	- fwym(j,i) * ( &
[978]	215	kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	216	+ kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	217	) &
[56]	218	+ wall_w_y(j,i) * wsvs(k,j,i) &
[1]	219	) * ddy &
[1340]	220	+ 2.0_wp * ( &
[1]	221	km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	222	- km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	223	) * ddzu(k+1)
[1]	224	ENDDO
	225	ENDIF
	226
	227	ENDDO
	228	ENDDO
	229
	230	END SUBROUTINE diffusion_w
	231
	232
	233	!------------------------------------------------------------------------------!
[1682]	234	! Description:
	235	! ------------
	236	!> Call for all grid points - accelerator version
[1015]	237	!------------------------------------------------------------------------------!
	238	SUBROUTINE diffusion_w_acc
	239
[1320]	240	USE arrays_3d, &
	241	ONLY : ddzu, ddzw, km, tend, u, v, w
	242
	243	USE control_parameters, &
	244	ONLY : topography
	245
	246	USE grid_variables, &
	247	ONLY : ddx, ddy, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y
	248
	249	USE indices, &
	250	ONLY : i_left, i_right, j_north, j_south, nxl, nxr, nyn, nys, nzb, &
	251	nzb_w_inner, nzb_w_outer, nzt
	252
	253	USE kinds
[1015]	254
	255	IMPLICIT NONE
	256
[1682]	257	INTEGER(iwp) :: i !<
	258	INTEGER(iwp) :: j !<
	259	INTEGER(iwp) :: k !<
[1320]	260
[1682]	261	REAL(wp) :: kmxm !<
	262	REAL(wp) :: kmxp !<
	263	REAL(wp) :: kmym !<
	264	REAL(wp) :: kmyp !<
[1015]	265
[1682]	266	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsus !<
	267	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsvs !<
[1015]	268	!$acc declare create ( wsus, wsvs )
	269
	270	!
	271	!-- First calculate horizontal momentum flux w'u' and/or w'v' at vertical
	272	!-- walls, if neccessary
	273	IF ( topography /= 'flat' ) THEN
[1320]	274	CALL wall_fluxes_acc( wsus, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp, &
	275	nzb_w_inner, nzb_w_outer, wall_w_x )
	276	CALL wall_fluxes_acc( wsvs, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp, &
	277	nzb_w_inner, nzb_w_outer, wall_w_y )
[1015]	278	ENDIF
	279
[1374]	280	!$acc kernels present ( u, v, w, km, tend ) &
[1015]	281	!$acc present ( ddzu, ddzw, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y ) &
	282	!$acc present ( nzb_w_inner, nzb_w_outer )
[1128]	283	DO i = i_left, i_right
	284	DO j = j_south, j_north
[1015]	285	DO k = 1, nzt
	286	IF ( k > nzb_w_outer(j,i) ) THEN
	287	!
	288	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	289	kmxp = 0.25_wp * &
[1015]	290	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	291	kmxm = 0.25_wp * &
[1015]	292	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	293	kmyp = 0.25_wp * &
[1015]	294	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	295	kmym = 0.25_wp * &
[1015]	296	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
	297
	298	tend(k,j,i) = tend(k,j,i) &
	299	& + ( kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	300	& + kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	301	& - kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	302	& - kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
	303	& ) * ddx &
	304	& + ( kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	305	& + kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	306	& - kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	307	& - kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
	308	& ) * ddy &
[1322]	309	& + 2.0_wp * ( &
[1015]	310	& km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	311	& - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	312	& ) * ddzu(k+1)
[1015]	313	ENDIF
	314	ENDDO
	315
	316	!
	317	!-- Wall functions at all vertical walls, where necessary
	318	DO k = 1,nzt
	319
	320	IF ( k > nzb_w_inner(j,i) .AND. k <= nzb_w_outer(j,i) .AND. &
[1340]	321	wall_w_x(j,i) /= 0.0_wp .AND. wall_w_y(j,i) /= 0.0_wp ) THEN
[1015]	322	!
	323	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	324	kmxp = 0.25_wp * &
[1015]	325	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	326	kmxm = 0.25_wp * &
[1015]	327	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	328	kmyp = 0.25_wp * &
[1015]	329	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	330	kmym = 0.25_wp * &
[1015]	331	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
	332
	333	tend(k,j,i) = tend(k,j,i) &
	334	+ ( fwxp(j,i) * ( &
	335	kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	336	+ kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	337	) &
	338	- fwxm(j,i) * ( &
	339	kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	340	+ kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
	341	) &
	342	+ wall_w_x(j,i) * wsus(k,j,i) &
	343	) * ddx &
	344	+ ( fwyp(j,i) * ( &
	345	kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	346	+ kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	347	) &
	348	- fwym(j,i) * ( &
	349	kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	350	+ kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
	351	) &
	352	+ wall_w_y(j,i) * wsvs(k,j,i) &
	353	) * ddy &
[1340]	354	+ 2.0_wp * ( &
[1015]	355	km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	356	- km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	357	) * ddzu(k+1)
[1015]	358	ENDIF
	359	ENDDO
	360
	361	ENDDO
	362	ENDDO
	363	!$acc end kernels
	364
	365	END SUBROUTINE diffusion_w_acc
	366
	367
	368	!------------------------------------------------------------------------------!
[1682]	369	! Description:
	370	! ------------
	371	!> Call for grid point i,j
[1]	372	!------------------------------------------------------------------------------!
[1001]	373	SUBROUTINE diffusion_w_ij( i, j )
[1]	374
[1320]	375	USE arrays_3d, &
	376	ONLY : ddzu, ddzw, km, tend, u, v, w
	377
	378	USE control_parameters, &
	379	ONLY : topography
	380
	381	USE grid_variables, &
	382	ONLY : ddx, ddy, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y
	383
	384	USE indices, &
	385	ONLY : nxl, nxr, nyn, nys, nzb, nzb_w_inner, nzb_w_outer, nzt
	386
	387	USE kinds
[1]	388
	389	IMPLICIT NONE
	390
[1682]	391	INTEGER(iwp) :: i !<
	392	INTEGER(iwp) :: j !<
	393	INTEGER(iwp) :: k !<
[1320]	394
[1682]	395	REAL(wp) :: kmxm !<
	396	REAL(wp) :: kmxp !<
	397	REAL(wp) :: kmym !<
	398	REAL(wp) :: kmyp !<
[1]	399
[1320]	400	REAL(wp), DIMENSION(nzb:nzt+1) :: wsus
	401	REAL(wp), DIMENSION(nzb:nzt+1) :: wsvs
[1]	402
[1001]	403
[1]	404	DO k = nzb_w_outer(j,i)+1, nzt-1
	405	!
	406	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	407	kmxp = 0.25_wp * ( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
	408	kmxm = 0.25_wp * ( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
	409	kmyp = 0.25_wp * ( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
	410	kmym = 0.25_wp * ( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
[1]	411
	412	tend(k,j,i) = tend(k,j,i) &
[978]	413	& + ( kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	414	& + kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	415	& - kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	416	& - kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	417	& ) * ddx &
[978]	418	& + ( kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	419	& + kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	420	& - kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	421	& - kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	422	& ) * ddy &
[1322]	423	& + 2.0_wp * ( &
[1]	424	& km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	425	& - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	426	& ) * ddzu(k+1)
[1]	427	ENDDO
	428
	429	!
	430	!-- Wall functions at all vertical walls, where necessary
[1340]	431	IF ( wall_w_x(j,i) /= 0.0_wp .OR. wall_w_y(j,i) /= 0.0_wp ) THEN
[51]	432
	433	!
	434	!-- Calculate the horizontal momentum fluxes w'u' and/or w'v'
[1340]	435	IF ( wall_w_x(j,i) /= 0.0_wp ) THEN
[1320]	436	CALL wall_fluxes( i, j, nzb_w_inner(j,i)+1, nzb_w_outer(j,i), &
	437	wsus, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp )
[51]	438	ELSE
[1340]	439	wsus = 0.0_wp
[51]	440	ENDIF
	441
[1340]	442	IF ( wall_w_y(j,i) /= 0.0_wp ) THEN
[1320]	443	CALL wall_fluxes( i, j, nzb_w_inner(j,i)+1, nzb_w_outer(j,i), &
	444	wsvs, 0.0_wp, 0.0_wp, 1.0_wp, 0.0_wp )
[51]	445	ELSE
[1340]	446	wsvs = 0.0_wp
[51]	447	ENDIF
	448
[1]	449	DO k = nzb_w_inner(j,i)+1, nzb_w_outer(j,i)
	450	!
	451	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	452	kmxp = 0.25_wp * ( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
	453	kmxm = 0.25_wp * ( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
	454	kmyp = 0.25_wp * ( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
	455	kmym = 0.25_wp * ( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
[1]	456
	457	tend(k,j,i) = tend(k,j,i) &
	458	+ ( fwxp(j,i) * ( &
[978]	459	kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	460	+ kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
[1]	461	) &
	462	- fwxm(j,i) * ( &
[978]	463	kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	464	+ kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	465	) &
[51]	466	+ wall_w_x(j,i) * wsus(k) &
[1]	467	) * ddx &
	468	+ ( fwyp(j,i) * ( &
[978]	469	kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	470	+ kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
[1]	471	) &
	472	- fwym(j,i) * ( &
[978]	473	kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	474	+ kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	475	) &
[51]	476	+ wall_w_y(j,i) * wsvs(k) &
[1]	477	) * ddy &
[1340]	478	+ 2.0_wp * ( &
[1]	479	km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	480	- km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	481	) * ddzu(k+1)
[1]	482	ENDDO
	483	ENDIF
	484
	485	END SUBROUTINE diffusion_w_ij
	486
[1323]	487	END MODULE diffusion_w_mod

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