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source: palm/trunk/SOURCE/diffusion_w.f90 @ 1777

Last change on this file since 1777 was 1683, checked in by knoop, 9 years ago
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[1682]	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	!
[1310]	16	! Copyright 1997-2014 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 1683 2015-10-07 23:57:51Z hoffmann $
	26	!
[1683]	27	! 1682 2015-10-07 23:56:08Z knoop
	28	! Code annotations made doxygen readable
	29	!
[1375]	30	! 1374 2014-04-25 12:55:07Z raasch
	31	! vsws + vswst removed from acc-present-list
	32	!
[1354]	33	! 1353 2014-04-08 15:21:23Z heinze
	34	! REAL constants provided with KIND-attribute
	35	!
[1341]	36	! 1340 2014-03-25 19:45:13Z kanani
	37	! REAL constants defined as wp-kind
	38	!
[1323]	39	! 1322 2014-03-20 16:38:49Z raasch
	40	! REAL constants defined as wp-kind
	41	!
[1321]	42	! 1320 2014-03-20 08:40:49Z raasch
[1320]	43	! ONLY-attribute added to USE-statements,
	44	! kind-parameters added to all INTEGER and REAL declaration statements,
	45	! kinds are defined in new module kinds,
	46	! revision history before 2012 removed,
	47	! comment fields (!:) to be used for variable explanations added to
	48	! all variable declaration statements
[1]	49	!
[1258]	50	! 1257 2013-11-08 15:18:40Z raasch
	51	! openacc loop and loop vector clauses removed, declare create moved after
	52	! the FORTRAN declaration statement
	53	!
[1132]	54	! 1128 2013-04-12 06:19:32Z raasch
	55	! loop index bounds in accelerator version replaced by i_left, i_right, j_south,
	56	! j_north
	57	!
[1037]	58	! 1036 2012-10-22 13:43:42Z raasch
	59	! code put under GPL (PALM 3.9)
	60	!
[1017]	61	! 1015 2012-09-27 09:23:24Z raasch
	62	! accelerator version (*_acc) added
	63	!
[1002]	64	! 1001 2012-09-13 14:08:46Z raasch
	65	! arrays comunicated by module instead of parameter list
	66	!
[979]	67	! 978 2012-08-09 08:28:32Z fricke
	68	! outflow damping layer removed
	69	! kmxm_x/_z and kmxp_x/_z change to kmxm and kmxp
	70	! kmym_y/_z and kmyp_y/_z change to kmym and kmyp
	71	!
[1]	72	! Revision 1.1 1997/09/12 06:24:11 raasch
	73	! Initial revision
	74	!
	75	!
	76	! Description:
	77	! ------------
[1682]	78	!> Diffusion term of the w-component
[1]	79	!------------------------------------------------------------------------------!
[1682]	80	MODULE diffusion_w_mod
	81
[1]	82
[1320]	83	USE wall_fluxes_mod, &
	84	ONLY : wall_fluxes, wall_fluxes_acc
[56]	85
[1]	86	PRIVATE
[1015]	87	PUBLIC diffusion_w, diffusion_w_acc
[1]	88
	89	INTERFACE diffusion_w
	90	MODULE PROCEDURE diffusion_w
	91	MODULE PROCEDURE diffusion_w_ij
	92	END INTERFACE diffusion_w
	93
[1015]	94	INTERFACE diffusion_w_acc
	95	MODULE PROCEDURE diffusion_w_acc
	96	END INTERFACE diffusion_w_acc
	97
[1]	98	CONTAINS
	99
	100
	101	!------------------------------------------------------------------------------!
[1682]	102	! Description:
	103	! ------------
	104	!> Call for all grid points
[1]	105	!------------------------------------------------------------------------------!
[1001]	106	SUBROUTINE diffusion_w
[1]	107
[1320]	108	USE arrays_3d, &
	109	ONLY : ddzu, ddzw, km, tend, u, v, w
	110
	111	USE control_parameters, &
	112	ONLY : topography
	113
	114	USE grid_variables, &
	115	ONLY : ddx, ddy, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y
	116
	117	USE indices, &
	118	ONLY : nxl, nxr, nyn, nys, nzb, nzb_w_inner, nzb_w_outer, nzt
	119
	120	USE kinds
[1]	121
	122	IMPLICIT NONE
	123
[1682]	124	INTEGER(iwp) :: i !<
	125	INTEGER(iwp) :: j !<
	126	INTEGER(iwp) :: k !<
[1320]	127
[1682]	128	REAL(wp) :: kmxm !<
	129	REAL(wp) :: kmxp !<
	130	REAL(wp) :: kmym !<
	131	REAL(wp) :: kmyp !<
[1001]	132
[1682]	133	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsus !<
	134	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsvs !<
[1]	135
	136
[56]	137	!
	138	!-- First calculate horizontal momentum flux w'u' and/or w'v' at vertical
	139	!-- walls, if neccessary
	140	IF ( topography /= 'flat' ) THEN
[1320]	141	CALL wall_fluxes( wsus, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp, nzb_w_inner, &
[56]	142	nzb_w_outer, wall_w_x )
[1320]	143	CALL wall_fluxes( wsvs, 0.0_wp, 0.0_wp, 1.0_wp, 0.0_wp, nzb_w_inner, &
[56]	144	nzb_w_outer, wall_w_y )
	145	ENDIF
	146
[1]	147	DO i = nxl, nxr
	148	DO j = nys, nyn
	149	DO k = nzb_w_outer(j,i)+1, nzt-1
	150	!
	151	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	152	kmxp = 0.25_wp * &
[978]	153	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	154	kmxm = 0.25_wp * &
[978]	155	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	156	kmyp = 0.25_wp * &
[978]	157	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	158	kmym = 0.25_wp * &
[978]	159	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
[1]	160
	161	tend(k,j,i) = tend(k,j,i) &
[978]	162	& + ( kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	163	& + kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	164	& - kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	165	& - kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	166	& ) * ddx &
[978]	167	& + ( kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	168	& + kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	169	& - kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	170	& - kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	171	& ) * ddy &
[1322]	172	& + 2.0_wp * ( &
[1]	173	& km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	174	& - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	175	& ) * ddzu(k+1)
[1]	176	ENDDO
	177
	178	!
	179	!-- Wall functions at all vertical walls, where necessary
[1340]	180	IF ( wall_w_x(j,i) /= 0.0_wp .OR. wall_w_y(j,i) /= 0.0_wp ) THEN
[51]	181
[1]	182	DO k = nzb_w_inner(j,i)+1, nzb_w_outer(j,i)
	183	!
	184	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	185	kmxp = 0.25_wp * &
[978]	186	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	187	kmxm = 0.25_wp * &
[978]	188	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	189	kmyp = 0.25_wp * &
[978]	190	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	191	kmym = 0.25_wp * &
[978]	192	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
[1]	193
	194	tend(k,j,i) = tend(k,j,i) &
	195	+ ( fwxp(j,i) * ( &
[978]	196	kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	197	+ kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
[1]	198	) &
	199	- fwxm(j,i) * ( &
[978]	200	kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	201	+ kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	202	) &
[56]	203	+ wall_w_x(j,i) * wsus(k,j,i) &
[1]	204	) * ddx &
	205	+ ( fwyp(j,i) * ( &
[978]	206	kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	207	+ kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
[1]	208	) &
	209	- fwym(j,i) * ( &
[978]	210	kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	211	+ kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	212	) &
[56]	213	+ wall_w_y(j,i) * wsvs(k,j,i) &
[1]	214	) * ddy &
[1340]	215	+ 2.0_wp * ( &
[1]	216	km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	217	- km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	218	) * ddzu(k+1)
[1]	219	ENDDO
	220	ENDIF
	221
	222	ENDDO
	223	ENDDO
	224
	225	END SUBROUTINE diffusion_w
	226
	227
	228	!------------------------------------------------------------------------------!
[1682]	229	! Description:
	230	! ------------
	231	!> Call for all grid points - accelerator version
[1015]	232	!------------------------------------------------------------------------------!
	233	SUBROUTINE diffusion_w_acc
	234
[1320]	235	USE arrays_3d, &
	236	ONLY : ddzu, ddzw, km, tend, u, v, w
	237
	238	USE control_parameters, &
	239	ONLY : topography
	240
	241	USE grid_variables, &
	242	ONLY : ddx, ddy, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y
	243
	244	USE indices, &
	245	ONLY : i_left, i_right, j_north, j_south, nxl, nxr, nyn, nys, nzb, &
	246	nzb_w_inner, nzb_w_outer, nzt
	247
	248	USE kinds
[1015]	249
	250	IMPLICIT NONE
	251
[1682]	252	INTEGER(iwp) :: i !<
	253	INTEGER(iwp) :: j !<
	254	INTEGER(iwp) :: k !<
[1320]	255
[1682]	256	REAL(wp) :: kmxm !<
	257	REAL(wp) :: kmxp !<
	258	REAL(wp) :: kmym !<
	259	REAL(wp) :: kmyp !<
[1015]	260
[1682]	261	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsus !<
	262	REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn,nxl:nxr) :: wsvs !<
[1015]	263	!$acc declare create ( wsus, wsvs )
	264
	265	!
	266	!-- First calculate horizontal momentum flux w'u' and/or w'v' at vertical
	267	!-- walls, if neccessary
	268	IF ( topography /= 'flat' ) THEN
[1320]	269	CALL wall_fluxes_acc( wsus, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp, &
	270	nzb_w_inner, nzb_w_outer, wall_w_x )
	271	CALL wall_fluxes_acc( wsvs, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp, &
	272	nzb_w_inner, nzb_w_outer, wall_w_y )
[1015]	273	ENDIF
	274
[1374]	275	!$acc kernels present ( u, v, w, km, tend ) &
[1015]	276	!$acc present ( ddzu, ddzw, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y ) &
	277	!$acc present ( nzb_w_inner, nzb_w_outer )
[1128]	278	DO i = i_left, i_right
	279	DO j = j_south, j_north
[1015]	280	DO k = 1, nzt
	281	IF ( k > nzb_w_outer(j,i) ) THEN
	282	!
	283	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	284	kmxp = 0.25_wp * &
[1015]	285	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	286	kmxm = 0.25_wp * &
[1015]	287	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	288	kmyp = 0.25_wp * &
[1015]	289	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	290	kmym = 0.25_wp * &
[1015]	291	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
	292
	293	tend(k,j,i) = tend(k,j,i) &
	294	& + ( kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	295	& + kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	296	& - kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	297	& - kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
	298	& ) * ddx &
	299	& + ( kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	300	& + kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	301	& - kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	302	& - kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
	303	& ) * ddy &
[1322]	304	& + 2.0_wp * ( &
[1015]	305	& km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	306	& - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	307	& ) * ddzu(k+1)
[1015]	308	ENDIF
	309	ENDDO
	310
	311	!
	312	!-- Wall functions at all vertical walls, where necessary
	313	DO k = 1,nzt
	314
	315	IF ( k > nzb_w_inner(j,i) .AND. k <= nzb_w_outer(j,i) .AND. &
[1340]	316	wall_w_x(j,i) /= 0.0_wp .AND. wall_w_y(j,i) /= 0.0_wp ) THEN
[1015]	317	!
	318	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	319	kmxp = 0.25_wp * &
[1015]	320	( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
[1322]	321	kmxm = 0.25_wp * &
[1015]	322	( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
[1322]	323	kmyp = 0.25_wp * &
[1015]	324	( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
[1322]	325	kmym = 0.25_wp * &
[1015]	326	( km(k,j,i)+km(k+1,j,i)+km(k,j-1,i)+km(k+1,j-1,i) )
	327
	328	tend(k,j,i) = tend(k,j,i) &
	329	+ ( fwxp(j,i) * ( &
	330	kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	331	+ kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	332	) &
	333	- fwxm(j,i) * ( &
	334	kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	335	+ kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
	336	) &
	337	+ wall_w_x(j,i) * wsus(k,j,i) &
	338	) * ddx &
	339	+ ( fwyp(j,i) * ( &
	340	kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	341	+ kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	342	) &
	343	- fwym(j,i) * ( &
	344	kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	345	+ kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
	346	) &
	347	+ wall_w_y(j,i) * wsvs(k,j,i) &
	348	) * ddy &
[1340]	349	+ 2.0_wp * ( &
[1015]	350	km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	351	- km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	352	) * ddzu(k+1)
[1015]	353	ENDIF
	354	ENDDO
	355
	356	ENDDO
	357	ENDDO
	358	!$acc end kernels
	359
	360	END SUBROUTINE diffusion_w_acc
	361
	362
	363	!------------------------------------------------------------------------------!
[1682]	364	! Description:
	365	! ------------
	366	!> Call for grid point i,j
[1]	367	!------------------------------------------------------------------------------!
[1001]	368	SUBROUTINE diffusion_w_ij( i, j )
[1]	369
[1320]	370	USE arrays_3d, &
	371	ONLY : ddzu, ddzw, km, tend, u, v, w
	372
	373	USE control_parameters, &
	374	ONLY : topography
	375
	376	USE grid_variables, &
	377	ONLY : ddx, ddy, fwxm, fwxp, fwym, fwyp, wall_w_x, wall_w_y
	378
	379	USE indices, &
	380	ONLY : nxl, nxr, nyn, nys, nzb, nzb_w_inner, nzb_w_outer, nzt
	381
	382	USE kinds
[1]	383
	384	IMPLICIT NONE
	385
[1682]	386	INTEGER(iwp) :: i !<
	387	INTEGER(iwp) :: j !<
	388	INTEGER(iwp) :: k !<
[1320]	389
[1682]	390	REAL(wp) :: kmxm !<
	391	REAL(wp) :: kmxp !<
	392	REAL(wp) :: kmym !<
	393	REAL(wp) :: kmyp !<
[1]	394
[1320]	395	REAL(wp), DIMENSION(nzb:nzt+1) :: wsus
	396	REAL(wp), DIMENSION(nzb:nzt+1) :: wsvs
[1]	397
[1001]	398
[1]	399	DO k = nzb_w_outer(j,i)+1, nzt-1
	400	!
	401	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	402	kmxp = 0.25_wp * ( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
	403	kmxm = 0.25_wp * ( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
	404	kmyp = 0.25_wp * ( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
	405	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]	406
	407	tend(k,j,i) = tend(k,j,i) &
[978]	408	& + ( kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	409	& + kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	410	& - kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	411	& - kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	412	& ) * ddx &
[978]	413	& + ( kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	414	& + kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	415	& - kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	416	& - kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	417	& ) * ddy &
[1322]	418	& + 2.0_wp * ( &
[1]	419	& km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	420	& - km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	421	& ) * ddzu(k+1)
[1]	422	ENDDO
	423
	424	!
	425	!-- Wall functions at all vertical walls, where necessary
[1340]	426	IF ( wall_w_x(j,i) /= 0.0_wp .OR. wall_w_y(j,i) /= 0.0_wp ) THEN
[51]	427
	428	!
	429	!-- Calculate the horizontal momentum fluxes w'u' and/or w'v'
[1340]	430	IF ( wall_w_x(j,i) /= 0.0_wp ) THEN
[1320]	431	CALL wall_fluxes( i, j, nzb_w_inner(j,i)+1, nzb_w_outer(j,i), &
	432	wsus, 0.0_wp, 0.0_wp, 0.0_wp, 1.0_wp )
[51]	433	ELSE
[1340]	434	wsus = 0.0_wp
[51]	435	ENDIF
	436
[1340]	437	IF ( wall_w_y(j,i) /= 0.0_wp ) THEN
[1320]	438	CALL wall_fluxes( i, j, nzb_w_inner(j,i)+1, nzb_w_outer(j,i), &
	439	wsvs, 0.0_wp, 0.0_wp, 1.0_wp, 0.0_wp )
[51]	440	ELSE
[1340]	441	wsvs = 0.0_wp
[51]	442	ENDIF
	443
[1]	444	DO k = nzb_w_inner(j,i)+1, nzb_w_outer(j,i)
	445	!
	446	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	447	kmxp = 0.25_wp * ( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
	448	kmxm = 0.25_wp * ( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
	449	kmyp = 0.25_wp * ( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
	450	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]	451
	452	tend(k,j,i) = tend(k,j,i) &
	453	+ ( fwxp(j,i) * ( &
[978]	454	kmxp * ( w(k,j,i+1) - w(k,j,i) ) * ddx &
	455	+ kmxp * ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
[1]	456	) &
	457	- fwxm(j,i) * ( &
[978]	458	kmxm * ( w(k,j,i) - w(k,j,i-1) ) * ddx &
	459	+ kmxm * ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
[1]	460	) &
[51]	461	+ wall_w_x(j,i) * wsus(k) &
[1]	462	) * ddx &
	463	+ ( fwyp(j,i) * ( &
[978]	464	kmyp * ( w(k,j+1,i) - w(k,j,i) ) * ddy &
	465	+ kmyp * ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
[1]	466	) &
	467	- fwym(j,i) * ( &
[978]	468	kmym * ( w(k,j,i) - w(k,j-1,i) ) * ddy &
	469	+ kmym * ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
[1]	470	) &
[51]	471	+ wall_w_y(j,i) * wsvs(k) &
[1]	472	) * ddy &
[1340]	473	+ 2.0_wp * ( &
[1]	474	km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	475	- km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
[1340]	476	) * ddzu(k+1)
[1]	477	ENDDO
	478	ENDIF
	479
	480	END SUBROUTINE diffusion_w_ij
	481
[1323]	482	END MODULE diffusion_w_mod

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