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source: palm/trunk/SOURCE/diffusion_w.f90 @ 1986

Last change on this file since 1986 was 1874, checked in by maronga, 9 years ago
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[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	! -----------------
[1341]	21	!
[1683]	22	!
[1321]	23	! Former revisions:
	24	! -----------------
	25	! $Id: diffusion_w.f90 1874 2016-04-18 14:51:10Z gronemeier $
	26	!
[1874]	27	! 1873 2016-04-18 14:50:06Z maronga
	28	! Module renamed (removed _mod)
	29	!
	30	!
[1851]	31	! 1850 2016-04-08 13:29:27Z maronga
	32	! Module renamed
	33	!
	34	!
[1683]	35	! 1682 2015-10-07 23:56:08Z knoop
	36	! Code annotations made doxygen readable
	37	!
[1375]	38	! 1374 2014-04-25 12:55:07Z raasch
	39	! vsws + vswst removed from acc-present-list
	40	!
[1354]	41	! 1353 2014-04-08 15:21:23Z heinze
	42	! REAL constants provided with KIND-attribute
	43	!
[1341]	44	! 1340 2014-03-25 19:45:13Z kanani
	45	! REAL constants defined as wp-kind
	46	!
[1323]	47	! 1322 2014-03-20 16:38:49Z raasch
	48	! REAL constants defined as wp-kind
	49	!
[1321]	50	! 1320 2014-03-20 08:40:49Z raasch
[1320]	51	! ONLY-attribute added to USE-statements,
	52	! kind-parameters added to all INTEGER and REAL declaration statements,
	53	! kinds are defined in new module kinds,
	54	! revision history before 2012 removed,
	55	! comment fields (!:) to be used for variable explanations added to
	56	! all variable declaration statements
[1]	57	!
[1258]	58	! 1257 2013-11-08 15:18:40Z raasch
	59	! openacc loop and loop vector clauses removed, declare create moved after
	60	! the FORTRAN declaration statement
	61	!
[1132]	62	! 1128 2013-04-12 06:19:32Z raasch
	63	! loop index bounds in accelerator version replaced by i_left, i_right, j_south,
	64	! j_north
	65	!
[1037]	66	! 1036 2012-10-22 13:43:42Z raasch
	67	! code put under GPL (PALM 3.9)
	68	!
[1017]	69	! 1015 2012-09-27 09:23:24Z raasch
	70	! accelerator version (*_acc) added
	71	!
[1002]	72	! 1001 2012-09-13 14:08:46Z raasch
	73	! arrays comunicated by module instead of parameter list
	74	!
[979]	75	! 978 2012-08-09 08:28:32Z fricke
	76	! outflow damping layer removed
	77	! kmxm_x/_z and kmxp_x/_z change to kmxm and kmxp
	78	! kmym_y/_z and kmyp_y/_z change to kmym and kmyp
	79	!
[1]	80	! Revision 1.1 1997/09/12 06:24:11 raasch
	81	! Initial revision
	82	!
	83	!
	84	! Description:
	85	! ------------
[1682]	86	!> Diffusion term of the w-component
[1]	87	!------------------------------------------------------------------------------!
[1682]	88	MODULE diffusion_w_mod
	89
[1]	90
[1320]	91	USE wall_fluxes_mod, &
	92	ONLY : wall_fluxes, wall_fluxes_acc
[56]	93
[1]	94	PRIVATE
[1015]	95	PUBLIC diffusion_w, diffusion_w_acc
[1]	96
	97	INTERFACE diffusion_w
	98	MODULE PROCEDURE diffusion_w
	99	MODULE PROCEDURE diffusion_w_ij
	100	END INTERFACE diffusion_w
	101
[1015]	102	INTERFACE diffusion_w_acc
	103	MODULE PROCEDURE diffusion_w_acc
	104	END INTERFACE diffusion_w_acc
	105
[1]	106	CONTAINS
	107
	108
	109	!------------------------------------------------------------------------------!
[1682]	110	! Description:
	111	! ------------
	112	!> Call for all grid points
[1]	113	!------------------------------------------------------------------------------!
[1001]	114	SUBROUTINE diffusion_w
[1]	115
[1320]	116	USE arrays_3d, &
	117	ONLY : ddzu, ddzw, km, tend, u, v, w
	118
	119	USE control_parameters, &
	120	ONLY : topography
	121
	122	USE grid_variables, &
	123	ONLY : ddx, ddy, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y
	124
	125	USE indices, &
	126	ONLY : nxl, nxr, nyn, nys, nzb, nzb_w_inner, nzb_w_outer, nzt
	127
	128	USE kinds
[1]	129
	130	IMPLICIT NONE
	131
[1682]	132	INTEGER(iwp) :: i !<
	133	INTEGER(iwp) :: j !<
	134	INTEGER(iwp) :: k !<
[1320]	135
[1682]	136	REAL(wp) :: kmxm !<
	137	REAL(wp) :: kmxp !<
	138	REAL(wp) :: kmym !<
	139	REAL(wp) :: kmyp !<
[1001]	140
[1682]	141	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsus !<
	142	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsvs !<
[1]	143
	144
[56]	145	!
	146	!-- First calculate horizontal momentum flux w'u' and/or w'v' at vertical
	147	!-- walls, if neccessary
	148	IF ( topography /= 'flat' ) THEN
[1320]	149	CALL wall_fluxes( wsus, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp, nzb_w_inner, &
[56]	150	nzb_w_outer, wall_w_x )
[1320]	151	CALL wall_fluxes( wsvs, 0.0_wp, 0.0_wp, 1.0_wp, 0.0_wp, nzb_w_inner, &
[56]	152	nzb_w_outer, wall_w_y )
	153	ENDIF
	154
[1]	155	DO i = nxl, nxr
	156	DO j = nys, nyn
	157	DO k = nzb_w_outer(j,i)+1, nzt-1
	158	!
	159	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	160	kmxp = 0.25_wp * &
[978]	161	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	162	kmxm = 0.25_wp * &
[978]	163	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	164	kmyp = 0.25_wp * &
[978]	165	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	166	kmym = 0.25_wp * &
[978]	167	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
[1]	168
	169	tend(k,j,i) = tend(k,j,i) &
[978]	170	& + ( kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	171	& + kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	172	& - kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	173	& - kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	174	& ) * ddx &
[978]	175	& + ( kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	176	& + kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	177	& - kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	178	& - kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	179	& ) * ddy &
[1322]	180	& + 2.0_wp * ( &
[1]	181	& km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	182	& - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	183	& ) * ddzu(k+1)
[1]	184	ENDDO
	185
	186	!
	187	!-- Wall functions at all vertical walls, where necessary
[1340]	188	IF ( wall_w_x(j,i) /= 0.0_wp .OR. wall_w_y(j,i) /= 0.0_wp ) THEN
[51]	189
[1]	190	DO k = nzb_w_inner(j,i)+1, nzb_w_outer(j,i)
	191	!
	192	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	193	kmxp = 0.25_wp * &
[978]	194	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	195	kmxm = 0.25_wp * &
[978]	196	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	197	kmyp = 0.25_wp * &
[978]	198	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	199	kmym = 0.25_wp * &
[978]	200	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
[1]	201
	202	tend(k,j,i) = tend(k,j,i) &
	203	+ ( fwxp(j,i) * ( &
[978]	204	kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	205	+ kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
[1]	206	) &
	207	- fwxm(j,i) * ( &
[978]	208	kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	209	+ kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	210	) &
[56]	211	+ wall_w_x(j,i) * wsus(k,j,i) &
[1]	212	) * ddx &
	213	+ ( fwyp(j,i) * ( &
[978]	214	kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	215	+ kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
[1]	216	) &
	217	- fwym(j,i) * ( &
[978]	218	kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	219	+ kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	220	) &
[56]	221	+ wall_w_y(j,i) * wsvs(k,j,i) &
[1]	222	) * ddy &
[1340]	223	+ 2.0_wp * ( &
[1]	224	km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	225	- km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	226	) * ddzu(k+1)
[1]	227	ENDDO
	228	ENDIF
	229
	230	ENDDO
	231	ENDDO
	232
	233	END SUBROUTINE diffusion_w
	234
	235
	236	!------------------------------------------------------------------------------!
[1682]	237	! Description:
	238	! ------------
	239	!> Call for all grid points - accelerator version
[1015]	240	!------------------------------------------------------------------------------!
	241	SUBROUTINE diffusion_w_acc
	242
[1320]	243	USE arrays_3d, &
	244	ONLY : ddzu, ddzw, km, tend, u, v, w
	245
	246	USE control_parameters, &
	247	ONLY : topography
	248
	249	USE grid_variables, &
	250	ONLY : ddx, ddy, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y
	251
	252	USE indices, &
	253	ONLY : i_left, i_right, j_north, j_south, nxl, nxr, nyn, nys, nzb, &
	254	nzb_w_inner, nzb_w_outer, nzt
	255
	256	USE kinds
[1015]	257
	258	IMPLICIT NONE
	259
[1682]	260	INTEGER(iwp) :: i !<
	261	INTEGER(iwp) :: j !<
	262	INTEGER(iwp) :: k !<
[1320]	263
[1682]	264	REAL(wp) :: kmxm !<
	265	REAL(wp) :: kmxp !<
	266	REAL(wp) :: kmym !<
	267	REAL(wp) :: kmyp !<
[1015]	268
[1682]	269	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsus !<
	270	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsvs !<
[1015]	271	!$acc declare create ( wsus, wsvs )
	272
	273	!
	274	!-- First calculate horizontal momentum flux w'u' and/or w'v' at vertical
	275	!-- walls, if neccessary
	276	IF ( topography /= 'flat' ) THEN
[1320]	277	CALL wall_fluxes_acc( wsus, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp, &
	278	nzb_w_inner, nzb_w_outer, wall_w_x )
	279	CALL wall_fluxes_acc( wsvs, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp, &
	280	nzb_w_inner, nzb_w_outer, wall_w_y )
[1015]	281	ENDIF
	282
[1374]	283	!$acc kernels present ( u, v, w, km, tend ) &
[1015]	284	!$acc present ( ddzu, ddzw, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y ) &
	285	!$acc present ( nzb_w_inner, nzb_w_outer )
[1128]	286	DO i = i_left, i_right
	287	DO j = j_south, j_north
[1015]	288	DO k = 1, nzt
	289	IF ( k > nzb_w_outer(j,i) ) THEN
	290	!
	291	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	292	kmxp = 0.25_wp * &
[1015]	293	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	294	kmxm = 0.25_wp * &
[1015]	295	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	296	kmyp = 0.25_wp * &
[1015]	297	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	298	kmym = 0.25_wp * &
[1015]	299	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
	300
	301	tend(k,j,i) = tend(k,j,i) &
	302	& + ( kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	303	& + kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	304	& - kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	305	& - kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
	306	& ) * ddx &
	307	& + ( kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	308	& + kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	309	& - kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	310	& - kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
	311	& ) * ddy &
[1322]	312	& + 2.0_wp * ( &
[1015]	313	& km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	314	& - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	315	& ) * ddzu(k+1)
[1015]	316	ENDIF
	317	ENDDO
	318
	319	!
	320	!-- Wall functions at all vertical walls, where necessary
	321	DO k = 1,nzt
	322
	323	IF ( k > nzb_w_inner(j,i) .AND. k <= nzb_w_outer(j,i) .AND. &
[1340]	324	wall_w_x(j,i) /= 0.0_wp .AND. wall_w_y(j,i) /= 0.0_wp ) THEN
[1015]	325	!
	326	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	327	kmxp = 0.25_wp * &
[1015]	328	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	329	kmxm = 0.25_wp * &
[1015]	330	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	331	kmyp = 0.25_wp * &
[1015]	332	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	333	kmym = 0.25_wp * &
[1015]	334	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
	335
	336	tend(k,j,i) = tend(k,j,i) &
	337	+ ( fwxp(j,i) * ( &
	338	kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	339	+ kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	340	) &
	341	- fwxm(j,i) * ( &
	342	kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	343	+ kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
	344	) &
	345	+ wall_w_x(j,i) * wsus(k,j,i) &
	346	) * ddx &
	347	+ ( fwyp(j,i) * ( &
	348	kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	349	+ kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	350	) &
	351	- fwym(j,i) * ( &
	352	kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	353	+ kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
	354	) &
	355	+ wall_w_y(j,i) * wsvs(k,j,i) &
	356	) * ddy &
[1340]	357	+ 2.0_wp * ( &
[1015]	358	km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	359	- km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	360	) * ddzu(k+1)
[1015]	361	ENDIF
	362	ENDDO
	363
	364	ENDDO
	365	ENDDO
	366	!$acc end kernels
	367
	368	END SUBROUTINE diffusion_w_acc
	369
	370
	371	!------------------------------------------------------------------------------!
[1682]	372	! Description:
	373	! ------------
	374	!> Call for grid point i,j
[1]	375	!------------------------------------------------------------------------------!
[1001]	376	SUBROUTINE diffusion_w_ij( i, j )
[1]	377
[1320]	378	USE arrays_3d, &
	379	ONLY : ddzu, ddzw, km, tend, u, v, w
	380
	381	USE control_parameters, &
	382	ONLY : topography
	383
	384	USE grid_variables, &
	385	ONLY : ddx, ddy, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y
	386
	387	USE indices, &
	388	ONLY : nxl, nxr, nyn, nys, nzb, nzb_w_inner, nzb_w_outer, nzt
	389
	390	USE kinds
[1]	391
	392	IMPLICIT NONE
	393
[1682]	394	INTEGER(iwp) :: i !<
	395	INTEGER(iwp) :: j !<
	396	INTEGER(iwp) :: k !<
[1320]	397
[1682]	398	REAL(wp) :: kmxm !<
	399	REAL(wp) :: kmxp !<
	400	REAL(wp) :: kmym !<
	401	REAL(wp) :: kmyp !<
[1]	402
[1320]	403	REAL(wp), DIMENSION(nzb:nzt+1) :: wsus
	404	REAL(wp), DIMENSION(nzb:nzt+1) :: wsvs
[1]	405
[1001]	406
[1]	407	DO k = nzb_w_outer(j,i)+1, nzt-1
	408	!
	409	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	410	kmxp = 0.25_wp * ( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
	411	kmxm = 0.25_wp * ( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
	412	kmyp = 0.25_wp * ( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
	413	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]	414
	415	tend(k,j,i) = tend(k,j,i) &
[978]	416	& + ( kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	417	& + kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	418	& - kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	419	& - kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	420	& ) * ddx &
[978]	421	& + ( kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	422	& + kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	423	& - kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	424	& - kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	425	& ) * ddy &
[1322]	426	& + 2.0_wp * ( &
[1]	427	& km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	428	& - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	429	& ) * ddzu(k+1)
[1]	430	ENDDO
	431
	432	!
	433	!-- Wall functions at all vertical walls, where necessary
[1340]	434	IF ( wall_w_x(j,i) /= 0.0_wp .OR. wall_w_y(j,i) /= 0.0_wp ) THEN
[51]	435
	436	!
	437	!-- Calculate the horizontal momentum fluxes w'u' and/or w'v'
[1340]	438	IF ( wall_w_x(j,i) /= 0.0_wp ) THEN
[1320]	439	CALL wall_fluxes( i, j, nzb_w_inner(j,i)+1, nzb_w_outer(j,i), &
	440	wsus, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp )
[51]	441	ELSE
[1340]	442	wsus = 0.0_wp
[51]	443	ENDIF
	444
[1340]	445	IF ( wall_w_y(j,i) /= 0.0_wp ) THEN
[1320]	446	CALL wall_fluxes( i, j, nzb_w_inner(j,i)+1, nzb_w_outer(j,i), &
	447	wsvs, 0.0_wp, 0.0_wp, 1.0_wp, 0.0_wp )
[51]	448	ELSE
[1340]	449	wsvs = 0.0_wp
[51]	450	ENDIF
	451
[1]	452	DO k = nzb_w_inner(j,i)+1, nzb_w_outer(j,i)
	453	!
	454	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	455	kmxp = 0.25_wp * ( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
	456	kmxm = 0.25_wp * ( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
	457	kmyp = 0.25_wp * ( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
	458	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]	459
	460	tend(k,j,i) = tend(k,j,i) &
	461	+ ( fwxp(j,i) * ( &
[978]	462	kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	463	+ kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
[1]	464	) &
	465	- fwxm(j,i) * ( &
[978]	466	kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	467	+ kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	468	) &
[51]	469	+ wall_w_x(j,i) * wsus(k) &
[1]	470	) * ddx &
	471	+ ( fwyp(j,i) * ( &
[978]	472	kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	473	+ kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
[1]	474	) &
	475	- fwym(j,i) * ( &
[978]	476	kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	477	+ kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	478	) &
[51]	479	+ wall_w_y(j,i) * wsvs(k) &
[1]	480	) * ddy &
[1340]	481	+ 2.0_wp * ( &
[1]	482	km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	483	- km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	484	) * ddzu(k+1)
[1]	485	ENDDO
	486	ENDIF
	487
	488	END SUBROUTINE diffusion_w_ij
	489
[1323]	490	END MODULE diffusion_w_mod

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