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source: palm/trunk/SOURCE/diffusion_w.f90 @ 1419

Last change on this file since 1419 was 1375, checked in by raasch, 11 years ago
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[1]	1	MODULE diffusion_w_mod
	2
[1036]	3	!--------------------------------------------------------------------------------!
	4	! This file is part of PALM.
	5	!
	6	! PALM is free software: you can redistribute it and/or modify it under the terms
	7	! of the GNU General Public License as published by the Free Software Foundation,
	8	! either version 3 of the License, or (at your option) any later 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	!
[1310]	17	! Copyright 1997-2014 Leibniz Universitaet Hannover
[1036]	18	!--------------------------------------------------------------------------------!
	19	!
[484]	20	! Current revisions:
[1]	21	! -----------------
[1341]	22	!
[1375]	23	!
[1321]	24	! Former revisions:
	25	! -----------------
	26	! $Id: diffusion_w.f90 1375 2014-04-25 13:07:08Z fricke $
	27	!
[1375]	28	! 1374 2014-04-25 12:55:07Z raasch
	29	! vsws + vswst removed from acc-present-list
	30	!
[1354]	31	! 1353 2014-04-08 15:21:23Z heinze
	32	! REAL constants provided with KIND-attribute
	33	!
[1341]	34	! 1340 2014-03-25 19:45:13Z kanani
	35	! REAL constants defined as wp-kind
	36	!
[1323]	37	! 1322 2014-03-20 16:38:49Z raasch
	38	! REAL constants defined as wp-kind
	39	!
[1321]	40	! 1320 2014-03-20 08:40:49Z raasch
[1320]	41	! ONLY-attribute added to USE-statements,
	42	! kind-parameters added to all INTEGER and REAL declaration statements,
	43	! kinds are defined in new module kinds,
	44	! revision history before 2012 removed,
	45	! comment fields (!:) to be used for variable explanations added to
	46	! all variable declaration statements
[1]	47	!
[1258]	48	! 1257 2013-11-08 15:18:40Z raasch
	49	! openacc loop and loop vector clauses removed, declare create moved after
	50	! the FORTRAN declaration statement
	51	!
[1132]	52	! 1128 2013-04-12 06:19:32Z raasch
	53	! loop index bounds in accelerator version replaced by i_left, i_right, j_south,
	54	! j_north
	55	!
[1037]	56	! 1036 2012-10-22 13:43:42Z raasch
	57	! code put under GPL (PALM 3.9)
	58	!
[1017]	59	! 1015 2012-09-27 09:23:24Z raasch
	60	! accelerator version (*_acc) added
	61	!
[1002]	62	! 1001 2012-09-13 14:08:46Z raasch
	63	! arrays comunicated by module instead of parameter list
	64	!
[979]	65	! 978 2012-08-09 08:28:32Z fricke
	66	! outflow damping layer removed
	67	! kmxm_x/_z and kmxp_x/_z change to kmxm and kmxp
	68	! kmym_y/_z and kmyp_y/_z change to kmym and kmyp
	69	!
[1]	70	! Revision 1.1 1997/09/12 06:24:11 raasch
	71	! Initial revision
	72	!
	73	!
	74	! Description:
	75	! ------------
	76	! Diffusion term of the w-component
	77	!------------------------------------------------------------------------------!
	78
[1320]	79	USE wall_fluxes_mod, &
	80	ONLY : wall_fluxes, wall_fluxes_acc
[56]	81
[1]	82	PRIVATE
[1015]	83	PUBLIC diffusion_w, diffusion_w_acc
[1]	84
	85	INTERFACE diffusion_w
	86	MODULE PROCEDURE diffusion_w
	87	MODULE PROCEDURE diffusion_w_ij
	88	END INTERFACE diffusion_w
	89
[1015]	90	INTERFACE diffusion_w_acc
	91	MODULE PROCEDURE diffusion_w_acc
	92	END INTERFACE diffusion_w_acc
	93
[1]	94	CONTAINS
	95
	96
	97	!------------------------------------------------------------------------------!
	98	! Call for all grid points
	99	!------------------------------------------------------------------------------!
[1001]	100	SUBROUTINE diffusion_w
[1]	101
[1320]	102	USE arrays_3d, &
	103	ONLY : ddzu, ddzw, km, tend, u, v, w
	104
	105	USE control_parameters, &
	106	ONLY : topography
	107
	108	USE grid_variables, &
	109	ONLY : ddx, ddy, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y
	110
	111	USE indices, &
	112	ONLY : nxl, nxr, nyn, nys, nzb, nzb_w_inner, nzb_w_outer, nzt
	113
	114	USE kinds
[1]	115
	116	IMPLICIT NONE
	117
[1320]	118	INTEGER(iwp) :: i !:
	119	INTEGER(iwp) :: j !:
	120	INTEGER(iwp) :: k !:
	121
	122	REAL(wp) :: kmxm !:
	123	REAL(wp) :: kmxp !:
	124	REAL(wp) :: kmym !:
	125	REAL(wp) :: kmyp !:
[1001]	126
[1320]	127	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsus !:
	128	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsvs !:
[1]	129
	130
[56]	131	!
	132	!-- First calculate horizontal momentum flux w'u' and/or w'v' at vertical
	133	!-- walls, if neccessary
	134	IF ( topography /= 'flat' ) THEN
[1320]	135	CALL wall_fluxes( wsus, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp, nzb_w_inner, &
[56]	136	nzb_w_outer, wall_w_x )
[1320]	137	CALL wall_fluxes( wsvs, 0.0_wp, 0.0_wp, 1.0_wp, 0.0_wp, nzb_w_inner, &
[56]	138	nzb_w_outer, wall_w_y )
	139	ENDIF
	140
[1]	141	DO i = nxl, nxr
	142	DO j = nys, nyn
	143	DO k = nzb_w_outer(j,i)+1, nzt-1
	144	!
	145	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	146	kmxp = 0.25_wp * &
[978]	147	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	148	kmxm = 0.25_wp * &
[978]	149	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	150	kmyp = 0.25_wp * &
[978]	151	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	152	kmym = 0.25_wp * &
[978]	153	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
[1]	154
	155	tend(k,j,i) = tend(k,j,i) &
[978]	156	& + ( kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	157	& + kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	158	& - kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	159	& - kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	160	& ) * ddx &
[978]	161	& + ( kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	162	& + kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	163	& - kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	164	& - kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	165	& ) * ddy &
[1322]	166	& + 2.0_wp * ( &
[1]	167	& km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	168	& - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	169	& ) * ddzu(k+1)
[1]	170	ENDDO
	171
	172	!
	173	!-- Wall functions at all vertical walls, where necessary
[1340]	174	IF ( wall_w_x(j,i) /= 0.0_wp .OR. wall_w_y(j,i) /= 0.0_wp ) THEN
[51]	175
[1]	176	DO k = nzb_w_inner(j,i)+1, nzb_w_outer(j,i)
	177	!
	178	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	179	kmxp = 0.25_wp * &
[978]	180	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	181	kmxm = 0.25_wp * &
[978]	182	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	183	kmyp = 0.25_wp * &
[978]	184	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	185	kmym = 0.25_wp * &
[978]	186	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
[1]	187
	188	tend(k,j,i) = tend(k,j,i) &
	189	+ ( fwxp(j,i) * ( &
[978]	190	kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	191	+ kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
[1]	192	) &
	193	- fwxm(j,i) * ( &
[978]	194	kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	195	+ kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	196	) &
[56]	197	+ wall_w_x(j,i) * wsus(k,j,i) &
[1]	198	) * ddx &
	199	+ ( fwyp(j,i) * ( &
[978]	200	kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	201	+ kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
[1]	202	) &
	203	- fwym(j,i) * ( &
[978]	204	kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	205	+ kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	206	) &
[56]	207	+ wall_w_y(j,i) * wsvs(k,j,i) &
[1]	208	) * ddy &
[1340]	209	+ 2.0_wp * ( &
[1]	210	km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	211	- km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	212	) * ddzu(k+1)
[1]	213	ENDDO
	214	ENDIF
	215
	216	ENDDO
	217	ENDDO
	218
	219	END SUBROUTINE diffusion_w
	220
	221
	222	!------------------------------------------------------------------------------!
[1015]	223	! Call for all grid points - accelerator version
	224	!------------------------------------------------------------------------------!
	225	SUBROUTINE diffusion_w_acc
	226
[1320]	227	USE arrays_3d, &
	228	ONLY : ddzu, ddzw, km, tend, u, v, w
	229
	230	USE control_parameters, &
	231	ONLY : topography
	232
	233	USE grid_variables, &
	234	ONLY : ddx, ddy, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y
	235
	236	USE indices, &
	237	ONLY : i_left, i_right, j_north, j_south, nxl, nxr, nyn, nys, nzb, &
	238	nzb_w_inner, nzb_w_outer, nzt
	239
	240	USE kinds
[1015]	241
	242	IMPLICIT NONE
	243
[1320]	244	INTEGER(iwp) :: i !:
	245	INTEGER(iwp) :: j !:
	246	INTEGER(iwp) :: k !:
	247
	248	REAL(wp) :: kmxm !:
	249	REAL(wp) :: kmxp !:
	250	REAL(wp) :: kmym !:
	251	REAL(wp) :: kmyp !:
[1015]	252
[1320]	253	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsus !:
	254	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsvs !:
[1015]	255	!$acc declare create ( wsus, wsvs )
	256
	257	!
	258	!-- First calculate horizontal momentum flux w'u' and/or w'v' at vertical
	259	!-- walls, if neccessary
	260	IF ( topography /= 'flat' ) THEN
[1320]	261	CALL wall_fluxes_acc( wsus, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp, &
	262	nzb_w_inner, nzb_w_outer, wall_w_x )
	263	CALL wall_fluxes_acc( wsvs, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp, &
	264	nzb_w_inner, nzb_w_outer, wall_w_y )
[1015]	265	ENDIF
	266
[1374]	267	!$acc kernels present ( u, v, w, km, tend ) &
[1015]	268	!$acc present ( ddzu, ddzw, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y ) &
	269	!$acc present ( nzb_w_inner, nzb_w_outer )
[1128]	270	DO i = i_left, i_right
	271	DO j = j_south, j_north
[1015]	272	DO k = 1, nzt
	273	IF ( k > nzb_w_outer(j,i) ) THEN
	274	!
	275	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	276	kmxp = 0.25_wp * &
[1015]	277	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	278	kmxm = 0.25_wp * &
[1015]	279	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	280	kmyp = 0.25_wp * &
[1015]	281	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	282	kmym = 0.25_wp * &
[1015]	283	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
	284
	285	tend(k,j,i) = tend(k,j,i) &
	286	& + ( kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	287	& + kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	288	& - kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	289	& - kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
	290	& ) * ddx &
	291	& + ( kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	292	& + kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	293	& - kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	294	& - kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
	295	& ) * ddy &
[1322]	296	& + 2.0_wp * ( &
[1015]	297	& km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	298	& - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	299	& ) * ddzu(k+1)
[1015]	300	ENDIF
	301	ENDDO
	302
	303	!
	304	!-- Wall functions at all vertical walls, where necessary
	305	DO k = 1,nzt
	306
	307	IF ( k > nzb_w_inner(j,i) .AND. k <= nzb_w_outer(j,i) .AND. &
[1340]	308	wall_w_x(j,i) /= 0.0_wp .AND. wall_w_y(j,i) /= 0.0_wp ) THEN
[1015]	309	!
	310	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	311	kmxp = 0.25_wp * &
[1015]	312	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	313	kmxm = 0.25_wp * &
[1015]	314	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	315	kmyp = 0.25_wp * &
[1015]	316	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	317	kmym = 0.25_wp * &
[1015]	318	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
	319
	320	tend(k,j,i) = tend(k,j,i) &
	321	+ ( fwxp(j,i) * ( &
	322	kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	323	+ kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	324	) &
	325	- fwxm(j,i) * ( &
	326	kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	327	+ kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
	328	) &
	329	+ wall_w_x(j,i) * wsus(k,j,i) &
	330	) * ddx &
	331	+ ( fwyp(j,i) * ( &
	332	kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	333	+ kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	334	) &
	335	- fwym(j,i) * ( &
	336	kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	337	+ kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
	338	) &
	339	+ wall_w_y(j,i) * wsvs(k,j,i) &
	340	) * ddy &
[1340]	341	+ 2.0_wp * ( &
[1015]	342	km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	343	- km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	344	) * ddzu(k+1)
[1015]	345	ENDIF
	346	ENDDO
	347
	348	ENDDO
	349	ENDDO
	350	!$acc end kernels
	351
	352	END SUBROUTINE diffusion_w_acc
	353
	354
	355	!------------------------------------------------------------------------------!
[1]	356	! Call for grid point i,j
	357	!------------------------------------------------------------------------------!
[1001]	358	SUBROUTINE diffusion_w_ij( i, j )
[1]	359
[1320]	360	USE arrays_3d, &
	361	ONLY : ddzu, ddzw, km, tend, u, v, w
	362
	363	USE control_parameters, &
	364	ONLY : topography
	365
	366	USE grid_variables, &
	367	ONLY : ddx, ddy, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y
	368
	369	USE indices, &
	370	ONLY : nxl, nxr, nyn, nys, nzb, nzb_w_inner, nzb_w_outer, nzt
	371
	372	USE kinds
[1]	373
	374	IMPLICIT NONE
	375
[1320]	376	INTEGER(iwp) :: i !:
	377	INTEGER(iwp) :: j !:
	378	INTEGER(iwp) :: k !:
	379
	380	REAL(wp) :: kmxm !:
	381	REAL(wp) :: kmxp !:
	382	REAL(wp) :: kmym !:
	383	REAL(wp) :: kmyp !:
[1]	384
[1320]	385	REAL(wp), DIMENSION(nzb:nzt+1) :: wsus
	386	REAL(wp), DIMENSION(nzb:nzt+1) :: wsvs
[1]	387
[1001]	388
[1]	389	DO k = nzb_w_outer(j,i)+1, nzt-1
	390	!
	391	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	392	kmxp = 0.25_wp * ( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
	393	kmxm = 0.25_wp * ( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
	394	kmyp = 0.25_wp * ( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
	395	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]	396
	397	tend(k,j,i) = tend(k,j,i) &
[978]	398	& + ( kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	399	& + kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	400	& - kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	401	& - kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	402	& ) * ddx &
[978]	403	& + ( kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	404	& + kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	405	& - kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	406	& - kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	407	& ) * ddy &
[1322]	408	& + 2.0_wp * ( &
[1]	409	& km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	410	& - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	411	& ) * ddzu(k+1)
[1]	412	ENDDO
	413
	414	!
	415	!-- Wall functions at all vertical walls, where necessary
[1340]	416	IF ( wall_w_x(j,i) /= 0.0_wp .OR. wall_w_y(j,i) /= 0.0_wp ) THEN
[51]	417
	418	!
	419	!-- Calculate the horizontal momentum fluxes w'u' and/or w'v'
[1340]	420	IF ( wall_w_x(j,i) /= 0.0_wp ) THEN
[1320]	421	CALL wall_fluxes( i, j, nzb_w_inner(j,i)+1, nzb_w_outer(j,i), &
	422	wsus, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp )
[51]	423	ELSE
[1340]	424	wsus = 0.0_wp
[51]	425	ENDIF
	426
[1340]	427	IF ( wall_w_y(j,i) /= 0.0_wp ) THEN
[1320]	428	CALL wall_fluxes( i, j, nzb_w_inner(j,i)+1, nzb_w_outer(j,i), &
	429	wsvs, 0.0_wp, 0.0_wp, 1.0_wp, 0.0_wp )
[51]	430	ELSE
[1340]	431	wsvs = 0.0_wp
[51]	432	ENDIF
	433
[1]	434	DO k = nzb_w_inner(j,i)+1, nzb_w_outer(j,i)
	435	!
	436	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	437	kmxp = 0.25_wp * ( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
	438	kmxm = 0.25_wp * ( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
	439	kmyp = 0.25_wp * ( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
	440	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]	441
	442	tend(k,j,i) = tend(k,j,i) &
	443	+ ( fwxp(j,i) * ( &
[978]	444	kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	445	+ kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
[1]	446	) &
	447	- fwxm(j,i) * ( &
[978]	448	kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	449	+ kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	450	) &
[51]	451	+ wall_w_x(j,i) * wsus(k) &
[1]	452	) * ddx &
	453	+ ( fwyp(j,i) * ( &
[978]	454	kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	455	+ kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
[1]	456	) &
	457	- fwym(j,i) * ( &
[978]	458	kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	459	+ kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	460	) &
[51]	461	+ wall_w_y(j,i) * wsvs(k) &
[1]	462	) * ddy &
[1340]	463	+ 2.0_wp * ( &
[1]	464	km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	465	- km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	466	) * ddzu(k+1)
[1]	467	ENDDO
	468	ENDIF
	469
	470	END SUBROUTINE diffusion_w_ij
	471
[1323]	472	END MODULE diffusion_w_mod

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