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source: palm/trunk/SOURCE/diffusion_s.f90 @ 1271

Last change on this file since 1271 was 1258, checked in by raasch, 11 years ago
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Rev	Line
[1]	1	MODULE diffusion_s_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	!
	17	! Copyright 1997-2012 Leibniz University Hannover
	18	!--------------------------------------------------------------------------------!
	19	!
[484]	20	! Current revisions:
[1001]	21	! ------------------
[1]	22	!
[1258]	23	!
[1]	24	! Former revisions:
	25	! -----------------
[3]	26	! $Id: diffusion_s.f90 1258 2013-11-08 16:09:09Z fricke $
[39]	27	!
[1258]	28	! 1257 2013-11-08 15:18:40Z raasch
	29	! openacc loop and loop vector clauses removed
	30	!
[1132]	31	! 1128 2013-04-12 06:19:32Z raasch
	32	! loop index bounds in accelerator version replaced by i_left, i_right, j_south,
	33	! j_north
	34	!
[1093]	35	! 1092 2013-02-02 11:24:22Z raasch
	36	! unused variables removed
	37	!
[1037]	38	! 1036 2012-10-22 13:43:42Z raasch
	39	! code put under GPL (PALM 3.9)
	40	!
[1017]	41	! 1015 2012-09-27 09:23:24Z raasch
	42	! accelerator version (*_acc) added
	43	!
[1011]	44	! 1010 2012-09-20 07:59:54Z raasch
	45	! cpp switch __nopointer added for pointer free version
	46	!
[1002]	47	! 1001 2012-09-13 14:08:46Z raasch
	48	! some arrays comunicated by module instead of parameter list
	49	!
[668]	50	! 667 2010-12-23 12:06:00Z suehring/gryschka
	51	! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng
	52	!
[198]	53	! 183 2008-08-04 15:39:12Z letzel
	54	! bugfix: calculation of fluxes at vertical surfaces
	55	!
[139]	56	! 129 2007-10-30 12:12:24Z letzel
	57	! replace wall_heatflux by wall_s_flux that is now included in the parameter
	58	! list, bugfix for assignment of fluxes at walls
	59	!
[39]	60	! 20 2007-02-26 00:12:32Z raasch
	61	! Bugfix: ddzw dimensioned 1:nzt"+1"
	62	! Calculation extended for gridpoint nzt, fluxes can be given at top,
	63	! +s_flux_t in parameter list, s_flux renamed s_flux_b
	64	!
[3]	65	! RCS Log replace by Id keyword, revision history cleaned up
	66	!
[1]	67	! Revision 1.8 2006/02/23 10:34:17 raasch
	68	! nzb_2d replaced by nzb_s_outer in horizontal diffusion and by nzb_s_inner
	69	! or nzb_diff_s_inner, respectively, in vertical diffusion, prescribed surface
	70	! fluxes at vertically oriented topography
	71	!
	72	! Revision 1.1 2000/04/13 14:54:02 schroeter
	73	! Initial revision
	74	!
	75	!
	76	! Description:
	77	! ------------
	78	! Diffusion term of scalar quantities (temperature and water content)
	79	!------------------------------------------------------------------------------!
	80
	81	PRIVATE
[1015]	82	PUBLIC diffusion_s, diffusion_s_acc
[1]	83
	84	INTERFACE diffusion_s
	85	MODULE PROCEDURE diffusion_s
	86	MODULE PROCEDURE diffusion_s_ij
	87	END INTERFACE diffusion_s
	88
[1015]	89	INTERFACE diffusion_s_acc
	90	MODULE PROCEDURE diffusion_s_acc
	91	END INTERFACE diffusion_s_acc
	92
[1]	93	CONTAINS
	94
	95
	96	!------------------------------------------------------------------------------!
	97	! Call for all grid points
	98	!------------------------------------------------------------------------------!
[1001]	99	SUBROUTINE diffusion_s( s, s_flux_b, s_flux_t, wall_s_flux )
[1]	100
[1001]	101	USE arrays_3d
[1]	102	USE control_parameters
	103	USE grid_variables
	104	USE indices
	105
	106	IMPLICIT NONE
	107
	108	INTEGER :: i, j, k
[129]	109	REAL :: wall_s_flux(0:4)
[1001]	110	REAL, DIMENSION(nysg:nyng,nxlg:nxrg) :: s_flux_b, s_flux_t
[1010]	111	#if defined( __nopointer )
	112	REAL, DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: s
	113	#else
[1001]	114	REAL, DIMENSION(:,:,:), POINTER :: s
[1010]	115	#endif
[1]	116
	117	DO i = nxl, nxr
	118	DO j = nys,nyn
	119	!
	120	!-- Compute horizontal diffusion
[19]	121	DO k = nzb_s_outer(j,i)+1, nzt
[1]	122
	123	tend(k,j,i) = tend(k,j,i) &
	124	+ 0.5 * ( &
	125	( kh(k,j,i) + kh(k,j,i+1) ) * ( s(k,j,i+1)-s(k,j,i) ) &
	126	- ( kh(k,j,i) + kh(k,j,i-1) ) * ( s(k,j,i)-s(k,j,i-1) ) &
	127	) * ddx2 &
	128	+ 0.5 * ( &
	129	( kh(k,j,i) + kh(k,j+1,i) ) * ( s(k,j+1,i)-s(k,j,i) ) &
	130	- ( kh(k,j,i) + kh(k,j-1,i) ) * ( s(k,j,i)-s(k,j-1,i) ) &
	131	) * ddy2
	132	ENDDO
	133
	134	!
	135	!-- Apply prescribed horizontal wall heatflux where necessary
	136	IF ( ( wall_w_x(j,i) .NE. 0.0 ) .OR. ( wall_w_y(j,i) .NE. 0.0 ) ) &
	137	THEN
	138	DO k = nzb_s_inner(j,i)+1, nzb_s_outer(j,i)
	139
	140	tend(k,j,i) = tend(k,j,i) &
[183]	141	+ ( fwxp(j,i) * 0.5 * &
[1]	142	( kh(k,j,i) + kh(k,j,i+1) ) * ( s(k,j,i+1)-s(k,j,i) ) &
[129]	143	+ ( 1.0 - fwxp(j,i) ) * wall_s_flux(1) &
[183]	144	-fwxm(j,i) * 0.5 * &
[1]	145	( kh(k,j,i) + kh(k,j,i-1) ) * ( s(k,j,i)-s(k,j,i-1) ) &
[129]	146	+ ( 1.0 - fwxm(j,i) ) * wall_s_flux(2) &
[1]	147	) * ddx2 &
[183]	148	+ ( fwyp(j,i) * 0.5 * &
[1]	149	( kh(k,j,i) + kh(k,j+1,i) ) * ( s(k,j+1,i)-s(k,j,i) ) &
[129]	150	+ ( 1.0 - fwyp(j,i) ) * wall_s_flux(3) &
[183]	151	-fwym(j,i) * 0.5 * &
[1]	152	( kh(k,j,i) + kh(k,j-1,i) ) * ( s(k,j,i)-s(k,j-1,i) ) &
[129]	153	+ ( 1.0 - fwym(j,i) ) * wall_s_flux(4) &
[1]	154	) * ddy2
	155	ENDDO
	156	ENDIF
	157
	158	!
	159	!-- Compute vertical diffusion. In case that surface fluxes have been
[19]	160	!-- prescribed or computed at bottom and/or top, index k starts/ends at
	161	!-- nzb+2 or nzt-1, respectively.
	162	DO k = nzb_diff_s_inner(j,i), nzt_diff
[1]	163
	164	tend(k,j,i) = tend(k,j,i) &
	165	+ 0.5 * ( &
	166	( kh(k,j,i) + kh(k+1,j,i) ) * ( s(k+1,j,i)-s(k,j,i) ) * ddzu(k+1) &
	167	- ( kh(k,j,i) + kh(k-1,j,i) ) * ( s(k,j,i)-s(k-1,j,i) ) * ddzu(k) &
	168	) * ddzw(k)
	169	ENDDO
	170
	171	!
[19]	172	!-- Vertical diffusion at the first computational gridpoint along
[1]	173	!-- z-direction
	174	IF ( use_surface_fluxes ) THEN
	175
	176	k = nzb_s_inner(j,i)+1
	177
	178	tend(k,j,i) = tend(k,j,i) &
	179	+ ( 0.5 * ( kh(k,j,i)+kh(k+1,j,i) ) &
	180	* ( s(k+1,j,i)-s(k,j,i) ) &
	181	* ddzu(k+1) &
[19]	182	+ s_flux_b(j,i) &
[1]	183	) * ddzw(k)
	184
	185	ENDIF
	186
[19]	187	!
	188	!-- Vertical diffusion at the last computational gridpoint along
	189	!-- z-direction
	190	IF ( use_top_fluxes ) THEN
	191
	192	k = nzt
	193
	194	tend(k,j,i) = tend(k,j,i) &
	195	+ ( - s_flux_t(j,i) &
[20]	196	- 0.5 * ( kh(k-1,j,i)+kh(k,j,i) ) &
	197	* ( s(k,j,i)-s(k-1,j,i) ) &
	198	* ddzu(k) &
[19]	199	) * ddzw(k)
	200
	201	ENDIF
	202
[1]	203	ENDDO
	204	ENDDO
	205
	206	END SUBROUTINE diffusion_s
	207
	208
	209	!------------------------------------------------------------------------------!
[1015]	210	! Call for all grid points - accelerator version
	211	!------------------------------------------------------------------------------!
	212	SUBROUTINE diffusion_s_acc( s, s_flux_b, s_flux_t, wall_s_flux )
	213
	214	USE arrays_3d
	215	USE control_parameters
	216	USE grid_variables
	217	USE indices
	218
	219	IMPLICIT NONE
	220
	221	INTEGER :: i, j, k
	222	REAL :: wall_s_flux(0:4)
	223	REAL, DIMENSION(nysg:nyng,nxlg:nxrg) :: s_flux_b, s_flux_t
	224	#if defined( __nopointer )
	225	REAL, DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: s
	226	#else
	227	REAL, DIMENSION(:,:,:), POINTER :: s
	228	#endif
	229
	230	!$acc kernels present( ddzu, ddzw, fwxm, fwxp, fwym, fwyp, kh ) &
	231	!$acc present( nzb_diff_s_inner, nzb_s_inner, nzb_s_outer, s ) &
	232	!$acc present( s_flux_b, s_flux_t, tend, wall_s_flux ) &
	233	!$acc present( wall_w_x, wall_w_y )
[1128]	234	DO i = i_left, i_right
	235	DO j = j_south, j_north
[1015]	236	!
	237	!-- Compute horizontal diffusion
	238	DO k = 1, nzt
	239	IF ( k > nzb_s_outer(j,i) ) THEN
	240
	241	tend(k,j,i) = tend(k,j,i) &
	242	+ 0.5 * ( &
	243	( kh(k,j,i) + kh(k,j,i+1) ) * ( s(k,j,i+1)-s(k,j,i) ) &
	244	- ( kh(k,j,i) + kh(k,j,i-1) ) * ( s(k,j,i)-s(k,j,i-1) ) &
	245	) * ddx2 &
	246	+ 0.5 * ( &
	247	( kh(k,j,i) + kh(k,j+1,i) ) * ( s(k,j+1,i)-s(k,j,i) ) &
	248	- ( kh(k,j,i) + kh(k,j-1,i) ) * ( s(k,j,i)-s(k,j-1,i) ) &
	249	) * ddy2
	250	ENDIF
	251	ENDDO
	252
	253	!
	254	!-- Apply prescribed horizontal wall heatflux where necessary
	255	DO k = 1, nzt
	256	IF ( k > nzb_s_inner(j,i) .AND. k <= nzb_s_outer(j,i) .AND. &
	257	( wall_w_x(j,i) /= 0.0 .OR. wall_w_y(j,i) /= 0.0 ) ) &
	258	THEN
	259	tend(k,j,i) = tend(k,j,i) &
	260	+ ( fwxp(j,i) * 0.5 * &
	261	( kh(k,j,i) + kh(k,j,i+1) ) * ( s(k,j,i+1)-s(k,j,i) ) &
	262	+ ( 1.0 - fwxp(j,i) ) * wall_s_flux(1) &
	263	-fwxm(j,i) * 0.5 * &
	264	( kh(k,j,i) + kh(k,j,i-1) ) * ( s(k,j,i)-s(k,j,i-1) ) &
	265	+ ( 1.0 - fwxm(j,i) ) * wall_s_flux(2) &
	266	) * ddx2 &
	267	+ ( fwyp(j,i) * 0.5 * &
	268	( kh(k,j,i) + kh(k,j+1,i) ) * ( s(k,j+1,i)-s(k,j,i) ) &
	269	+ ( 1.0 - fwyp(j,i) ) * wall_s_flux(3) &
	270	-fwym(j,i) * 0.5 * &
	271	( kh(k,j,i) + kh(k,j-1,i) ) * ( s(k,j,i)-s(k,j-1,i) ) &
	272	+ ( 1.0 - fwym(j,i) ) * wall_s_flux(4) &
	273	) * ddy2
	274	ENDIF
	275	ENDDO
	276
	277	!
	278	!-- Compute vertical diffusion. In case that surface fluxes have been
	279	!-- prescribed or computed at bottom and/or top, index k starts/ends at
	280	!-- nzb+2 or nzt-1, respectively.
	281	DO k = 1, nzt_diff
	282	IF ( k >= nzb_diff_s_inner(j,i) ) THEN
	283	tend(k,j,i) = tend(k,j,i) &
	284	+ 0.5 * ( &
	285	( kh(k,j,i) + kh(k+1,j,i) ) * ( s(k+1,j,i)-s(k,j,i) ) * ddzu(k+1) &
	286	- ( kh(k,j,i) + kh(k-1,j,i) ) * ( s(k,j,i)-s(k-1,j,i) ) * ddzu(k) &
	287	) * ddzw(k)
	288	ENDIF
	289	ENDDO
	290
	291	!
	292	!-- Vertical diffusion at the first computational gridpoint along
	293	!-- z-direction
	294	DO k = 1, nzt
	295	IF ( use_surface_fluxes .AND. k == nzb_s_inner(j,i)+1 ) THEN
	296	tend(k,j,i) = tend(k,j,i) &
	297	+ ( 0.5 * ( kh(k,j,i)+kh(k+1,j,i) ) &
	298	* ( s(k+1,j,i)-s(k,j,i) ) &
	299	* ddzu(k+1) &
	300	+ s_flux_b(j,i) &
	301	) * ddzw(k)
	302	ENDIF
	303
	304	!
	305	!-- Vertical diffusion at the last computational gridpoint along
	306	!-- z-direction
	307	IF ( use_top_fluxes .AND. k == nzt ) THEN
	308	tend(k,j,i) = tend(k,j,i) &
	309	+ ( - s_flux_t(j,i) &
	310	- 0.5 * ( kh(k-1,j,i)+kh(k,j,i) )&
	311	* ( s(k,j,i)-s(k-1,j,i) ) &
	312	* ddzu(k) &
	313	) * ddzw(k)
	314	ENDIF
	315	ENDDO
	316
	317	ENDDO
	318	ENDDO
	319	!$acc end kernels
	320
	321	END SUBROUTINE diffusion_s_acc
	322
	323
	324	!------------------------------------------------------------------------------!
[1]	325	! Call for grid point i,j
	326	!------------------------------------------------------------------------------!
[1001]	327	SUBROUTINE diffusion_s_ij( i, j, s, s_flux_b, s_flux_t, wall_s_flux )
[1]	328
[1001]	329	USE arrays_3d
[1]	330	USE control_parameters
	331	USE grid_variables
	332	USE indices
	333
	334	IMPLICIT NONE
	335
	336	INTEGER :: i, j, k
[129]	337	REAL :: wall_s_flux(0:4)
[1001]	338	REAL, DIMENSION(nysg:nyng,nxlg:nxrg) :: s_flux_b, s_flux_t
[1010]	339	#if defined( __nopointer )
	340	REAL, DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: s
	341	#else
[1001]	342	REAL, DIMENSION(:,:,:), POINTER :: s
[1010]	343	#endif
[1]	344
	345	!
	346	!-- Compute horizontal diffusion
[19]	347	DO k = nzb_s_outer(j,i)+1, nzt
[1]	348
	349	tend(k,j,i) = tend(k,j,i) &
	350	+ 0.5 * ( &
	351	( kh(k,j,i) + kh(k,j,i+1) ) * ( s(k,j,i+1)-s(k,j,i) ) &
	352	- ( kh(k,j,i) + kh(k,j,i-1) ) * ( s(k,j,i)-s(k,j,i-1) ) &
	353	) * ddx2 &
	354	+ 0.5 * ( &
	355	( kh(k,j,i) + kh(k,j+1,i) ) * ( s(k,j+1,i)-s(k,j,i) ) &
	356	- ( kh(k,j,i) + kh(k,j-1,i) ) * ( s(k,j,i)-s(k,j-1,i) ) &
	357	) * ddy2
	358	ENDDO
	359
	360	!
	361	!-- Apply prescribed horizontal wall heatflux where necessary
	362	IF ( ( wall_w_x(j,i) .NE. 0.0 ) .OR. ( wall_w_y(j,i) .NE. 0.0 ) ) &
	363	THEN
	364	DO k = nzb_s_inner(j,i)+1, nzb_s_outer(j,i)
	365
	366	tend(k,j,i) = tend(k,j,i) &
[183]	367	+ ( fwxp(j,i) * 0.5 * &
[1]	368	( kh(k,j,i) + kh(k,j,i+1) ) * ( s(k,j,i+1)-s(k,j,i) ) &
[129]	369	+ ( 1.0 - fwxp(j,i) ) * wall_s_flux(1) &
[183]	370	-fwxm(j,i) * 0.5 * &
[1]	371	( kh(k,j,i) + kh(k,j,i-1) ) * ( s(k,j,i)-s(k,j,i-1) ) &
[129]	372	+ ( 1.0 - fwxm(j,i) ) * wall_s_flux(2) &
[1]	373	) * ddx2 &
[183]	374	+ ( fwyp(j,i) * 0.5 * &
[1]	375	( kh(k,j,i) + kh(k,j+1,i) ) * ( s(k,j+1,i)-s(k,j,i) ) &
[129]	376	+ ( 1.0 - fwyp(j,i) ) * wall_s_flux(3) &
[183]	377	-fwym(j,i) * 0.5 * &
[1]	378	( kh(k,j,i) + kh(k,j-1,i) ) * ( s(k,j,i)-s(k,j-1,i) ) &
[129]	379	+ ( 1.0 - fwym(j,i) ) * wall_s_flux(4) &
[1]	380	) * ddy2
	381	ENDDO
	382	ENDIF
	383
	384	!
	385	!-- Compute vertical diffusion. In case that surface fluxes have been
[19]	386	!-- prescribed or computed at bottom and/or top, index k starts/ends at
	387	!-- nzb+2 or nzt-1, respectively.
	388	DO k = nzb_diff_s_inner(j,i), nzt_diff
[1]	389
	390	tend(k,j,i) = tend(k,j,i) &
	391	+ 0.5 * ( &
	392	( kh(k,j,i) + kh(k+1,j,i) ) * ( s(k+1,j,i)-s(k,j,i) ) * ddzu(k+1) &
	393	- ( kh(k,j,i) + kh(k-1,j,i) ) * ( s(k,j,i)-s(k-1,j,i) ) * ddzu(k) &
	394	) * ddzw(k)
	395	ENDDO
	396
	397	!
[19]	398	!-- Vertical diffusion at the first computational gridpoint along z-direction
[1]	399	IF ( use_surface_fluxes ) THEN
	400
	401	k = nzb_s_inner(j,i)+1
	402
[19]	403	tend(k,j,i) = tend(k,j,i) + ( 0.5 * ( kh(k,j,i)+kh(k+1,j,i) ) &
	404	* ( s(k+1,j,i)-s(k,j,i) ) &
	405	* ddzu(k+1) &
	406	+ s_flux_b(j,i) &
	407	) * ddzw(k)
[1]	408
	409	ENDIF
	410
[19]	411	!
	412	!-- Vertical diffusion at the last computational gridpoint along z-direction
	413	IF ( use_top_fluxes ) THEN
	414
	415	k = nzt
	416
	417	tend(k,j,i) = tend(k,j,i) + ( - s_flux_t(j,i) &
	418	- 0.5 * ( kh(k-1,j,i)+kh(k,j,i) ) &
	419	* ( s(k,j,i)-s(k-1,j,i) ) &
	420	* ddzu(k) &
	421	) * ddzw(k)
	422
	423	ENDIF
	424
[1]	425	END SUBROUTINE diffusion_s_ij
	426
	427	END MODULE diffusion_s_mod

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