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source: palm/trunk/SOURCE/diffusion_s.f90 @ 1017

Last change on this file since 1017 was 1017, checked in by raasch, 12 years ago
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Rev	Line
[1]	1	MODULE diffusion_s_mod
	2
	3	!------------------------------------------------------------------------------!
[484]	4	! Current revisions:
[1001]	5	! ------------------
[1]	6	!
[1017]	7	!
[1]	8	! Former revisions:
	9	! -----------------
[3]	10	! $Id: diffusion_s.f90 1017 2012-09-27 11:28:50Z raasch $
[39]	11	!
[1017]	12	! 1015 2012-09-27 09:23:24Z raasch
	13	! accelerator version (*_acc) added
	14	!
[1011]	15	! 1010 2012-09-20 07:59:54Z raasch
	16	! cpp switch __nopointer added for pointer free version
	17	!
[1002]	18	! 1001 2012-09-13 14:08:46Z raasch
	19	! some arrays comunicated by module instead of parameter list
	20	!
[668]	21	! 667 2010-12-23 12:06:00Z suehring/gryschka
	22	! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng
	23	!
[198]	24	! 183 2008-08-04 15:39:12Z letzel
	25	! bugfix: calculation of fluxes at vertical surfaces
	26	!
[139]	27	! 129 2007-10-30 12:12:24Z letzel
	28	! replace wall_heatflux by wall_s_flux that is now included in the parameter
	29	! list, bugfix for assignment of fluxes at walls
	30	!
[39]	31	! 20 2007-02-26 00:12:32Z raasch
	32	! Bugfix: ddzw dimensioned 1:nzt"+1"
	33	! Calculation extended for gridpoint nzt, fluxes can be given at top,
	34	! +s_flux_t in parameter list, s_flux renamed s_flux_b
	35	!
[3]	36	! RCS Log replace by Id keyword, revision history cleaned up
	37	!
[1]	38	! Revision 1.8 2006/02/23 10:34:17 raasch
	39	! nzb_2d replaced by nzb_s_outer in horizontal diffusion and by nzb_s_inner
	40	! or nzb_diff_s_inner, respectively, in vertical diffusion, prescribed surface
	41	! fluxes at vertically oriented topography
	42	!
	43	! Revision 1.1 2000/04/13 14:54:02 schroeter
	44	! Initial revision
	45	!
	46	!
	47	! Description:
	48	! ------------
	49	! Diffusion term of scalar quantities (temperature and water content)
	50	!------------------------------------------------------------------------------!
	51
	52	PRIVATE
[1015]	53	PUBLIC diffusion_s, diffusion_s_acc
[1]	54
	55	INTERFACE diffusion_s
	56	MODULE PROCEDURE diffusion_s
	57	MODULE PROCEDURE diffusion_s_ij
	58	END INTERFACE diffusion_s
	59
[1015]	60	INTERFACE diffusion_s_acc
	61	MODULE PROCEDURE diffusion_s_acc
	62	END INTERFACE diffusion_s_acc
	63
[1]	64	CONTAINS
	65
	66
	67	!------------------------------------------------------------------------------!
	68	! Call for all grid points
	69	!------------------------------------------------------------------------------!
[1001]	70	SUBROUTINE diffusion_s( s, s_flux_b, s_flux_t, wall_s_flux )
[1]	71
[1001]	72	USE arrays_3d
[1]	73	USE control_parameters
	74	USE grid_variables
	75	USE indices
	76
	77	IMPLICIT NONE
	78
	79	INTEGER :: i, j, k
	80	REAL :: vertical_gridspace
[129]	81	REAL :: wall_s_flux(0:4)
[1001]	82	REAL, DIMENSION(nysg:nyng,nxlg:nxrg) :: s_flux_b, s_flux_t
[1010]	83	#if defined( __nopointer )
	84	REAL, DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: s
	85	#else
[1001]	86	REAL, DIMENSION(:,:,:), POINTER :: s
[1010]	87	#endif
[1]	88
	89	DO i = nxl, nxr
	90	DO j = nys,nyn
	91	!
	92	!-- Compute horizontal diffusion
[19]	93	DO k = nzb_s_outer(j,i)+1, nzt
[1]	94
	95	tend(k,j,i) = tend(k,j,i) &
	96	+ 0.5 * ( &
	97	( kh(k,j,i) + kh(k,j,i+1) ) * ( s(k,j,i+1)-s(k,j,i) ) &
	98	- ( kh(k,j,i) + kh(k,j,i-1) ) * ( s(k,j,i)-s(k,j,i-1) ) &
	99	) * ddx2 &
	100	+ 0.5 * ( &
	101	( kh(k,j,i) + kh(k,j+1,i) ) * ( s(k,j+1,i)-s(k,j,i) ) &
	102	- ( kh(k,j,i) + kh(k,j-1,i) ) * ( s(k,j,i)-s(k,j-1,i) ) &
	103	) * ddy2
	104	ENDDO
	105
	106	!
	107	!-- Apply prescribed horizontal wall heatflux where necessary
	108	IF ( ( wall_w_x(j,i) .NE. 0.0 ) .OR. ( wall_w_y(j,i) .NE. 0.0 ) ) &
	109	THEN
	110	DO k = nzb_s_inner(j,i)+1, nzb_s_outer(j,i)
	111
	112	tend(k,j,i) = tend(k,j,i) &
[183]	113	+ ( fwxp(j,i) * 0.5 * &
[1]	114	( kh(k,j,i) + kh(k,j,i+1) ) * ( s(k,j,i+1)-s(k,j,i) ) &
[129]	115	+ ( 1.0 - fwxp(j,i) ) * wall_s_flux(1) &
[183]	116	-fwxm(j,i) * 0.5 * &
[1]	117	( kh(k,j,i) + kh(k,j,i-1) ) * ( s(k,j,i)-s(k,j,i-1) ) &
[129]	118	+ ( 1.0 - fwxm(j,i) ) * wall_s_flux(2) &
[1]	119	) * ddx2 &
[183]	120	+ ( fwyp(j,i) * 0.5 * &
[1]	121	( kh(k,j,i) + kh(k,j+1,i) ) * ( s(k,j+1,i)-s(k,j,i) ) &
[129]	122	+ ( 1.0 - fwyp(j,i) ) * wall_s_flux(3) &
[183]	123	-fwym(j,i) * 0.5 * &
[1]	124	( kh(k,j,i) + kh(k,j-1,i) ) * ( s(k,j,i)-s(k,j-1,i) ) &
[129]	125	+ ( 1.0 - fwym(j,i) ) * wall_s_flux(4) &
[1]	126	) * ddy2
	127	ENDDO
	128	ENDIF
	129
	130	!
	131	!-- Compute vertical diffusion. In case that surface fluxes have been
[19]	132	!-- prescribed or computed at bottom and/or top, index k starts/ends at
	133	!-- nzb+2 or nzt-1, respectively.
	134	DO k = nzb_diff_s_inner(j,i), nzt_diff
[1]	135
	136	tend(k,j,i) = tend(k,j,i) &
	137	+ 0.5 * ( &
	138	( kh(k,j,i) + kh(k+1,j,i) ) * ( s(k+1,j,i)-s(k,j,i) ) * ddzu(k+1) &
	139	- ( kh(k,j,i) + kh(k-1,j,i) ) * ( s(k,j,i)-s(k-1,j,i) ) * ddzu(k) &
	140	) * ddzw(k)
	141	ENDDO
	142
	143	!
[19]	144	!-- Vertical diffusion at the first computational gridpoint along
[1]	145	!-- z-direction
	146	IF ( use_surface_fluxes ) THEN
	147
	148	k = nzb_s_inner(j,i)+1
	149
	150	tend(k,j,i) = tend(k,j,i) &
	151	+ ( 0.5 * ( kh(k,j,i)+kh(k+1,j,i) ) &
	152	* ( s(k+1,j,i)-s(k,j,i) ) &
	153	* ddzu(k+1) &
[19]	154	+ s_flux_b(j,i) &
[1]	155	) * ddzw(k)
	156
	157	ENDIF
	158
[19]	159	!
	160	!-- Vertical diffusion at the last computational gridpoint along
	161	!-- z-direction
	162	IF ( use_top_fluxes ) THEN
	163
	164	k = nzt
	165
	166	tend(k,j,i) = tend(k,j,i) &
	167	+ ( - s_flux_t(j,i) &
[20]	168	- 0.5 * ( kh(k-1,j,i)+kh(k,j,i) ) &
	169	* ( s(k,j,i)-s(k-1,j,i) ) &
	170	* ddzu(k) &
[19]	171	) * ddzw(k)
	172
	173	ENDIF
	174
[1]	175	ENDDO
	176	ENDDO
	177
	178	END SUBROUTINE diffusion_s
	179
	180
	181	!------------------------------------------------------------------------------!
[1015]	182	! Call for all grid points - accelerator version
	183	!------------------------------------------------------------------------------!
	184	SUBROUTINE diffusion_s_acc( s, s_flux_b, s_flux_t, wall_s_flux )
	185
	186	USE arrays_3d
	187	USE control_parameters
	188	USE grid_variables
	189	USE indices
	190
	191	IMPLICIT NONE
	192
	193	INTEGER :: i, j, k
	194	REAL :: vertical_gridspace
	195	REAL :: wall_s_flux(0:4)
	196	REAL, DIMENSION(nysg:nyng,nxlg:nxrg) :: s_flux_b, s_flux_t
	197	#if defined( __nopointer )
	198	REAL, DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: s
	199	#else
	200	REAL, DIMENSION(:,:,:), POINTER :: s
	201	#endif
	202
	203	!$acc kernels present( ddzu, ddzw, fwxm, fwxp, fwym, fwyp, kh ) &
	204	!$acc present( nzb_diff_s_inner, nzb_s_inner, nzb_s_outer, s ) &
	205	!$acc present( s_flux_b, s_flux_t, tend, wall_s_flux ) &
	206	!$acc present( wall_w_x, wall_w_y )
	207	!$acc loop
	208	DO i = nxl, nxr
	209	DO j = nys,nyn
	210	!
	211	!-- Compute horizontal diffusion
	212	!$acc loop vector( 32 )
	213	DO k = 1, nzt
	214	IF ( k > nzb_s_outer(j,i) ) THEN
	215
	216	tend(k,j,i) = tend(k,j,i) &
	217	+ 0.5 * ( &
	218	( kh(k,j,i) + kh(k,j,i+1) ) * ( s(k,j,i+1)-s(k,j,i) ) &
	219	- ( kh(k,j,i) + kh(k,j,i-1) ) * ( s(k,j,i)-s(k,j,i-1) ) &
	220	) * ddx2 &
	221	+ 0.5 * ( &
	222	( kh(k,j,i) + kh(k,j+1,i) ) * ( s(k,j+1,i)-s(k,j,i) ) &
	223	- ( kh(k,j,i) + kh(k,j-1,i) ) * ( s(k,j,i)-s(k,j-1,i) ) &
	224	) * ddy2
	225	ENDIF
	226	ENDDO
	227
	228	!
	229	!-- Apply prescribed horizontal wall heatflux where necessary
	230	!$acc loop vector(32)
	231	DO k = 1, nzt
	232	IF ( k > nzb_s_inner(j,i) .AND. k <= nzb_s_outer(j,i) .AND. &
	233	( wall_w_x(j,i) /= 0.0 .OR. wall_w_y(j,i) /= 0.0 ) ) &
	234	THEN
	235	tend(k,j,i) = tend(k,j,i) &
	236	+ ( fwxp(j,i) * 0.5 * &
	237	( kh(k,j,i) + kh(k,j,i+1) ) * ( s(k,j,i+1)-s(k,j,i) ) &
	238	+ ( 1.0 - fwxp(j,i) ) * wall_s_flux(1) &
	239	-fwxm(j,i) * 0.5 * &
	240	( kh(k,j,i) + kh(k,j,i-1) ) * ( s(k,j,i)-s(k,j,i-1) ) &
	241	+ ( 1.0 - fwxm(j,i) ) * wall_s_flux(2) &
	242	) * ddx2 &
	243	+ ( fwyp(j,i) * 0.5 * &
	244	( kh(k,j,i) + kh(k,j+1,i) ) * ( s(k,j+1,i)-s(k,j,i) ) &
	245	+ ( 1.0 - fwyp(j,i) ) * wall_s_flux(3) &
	246	-fwym(j,i) * 0.5 * &
	247	( kh(k,j,i) + kh(k,j-1,i) ) * ( s(k,j,i)-s(k,j-1,i) ) &
	248	+ ( 1.0 - fwym(j,i) ) * wall_s_flux(4) &
	249	) * ddy2
	250	ENDIF
	251	ENDDO
	252
	253	!
	254	!-- Compute vertical diffusion. In case that surface fluxes have been
	255	!-- prescribed or computed at bottom and/or top, index k starts/ends at
	256	!-- nzb+2 or nzt-1, respectively.
	257	!$acc loop vector( 32 )
	258	DO k = 1, nzt_diff
	259	IF ( k >= nzb_diff_s_inner(j,i) ) THEN
	260	tend(k,j,i) = tend(k,j,i) &
	261	+ 0.5 * ( &
	262	( kh(k,j,i) + kh(k+1,j,i) ) * ( s(k+1,j,i)-s(k,j,i) ) * ddzu(k+1) &
	263	- ( kh(k,j,i) + kh(k-1,j,i) ) * ( s(k,j,i)-s(k-1,j,i) ) * ddzu(k) &
	264	) * ddzw(k)
	265	ENDIF
	266	ENDDO
	267
	268	!
	269	!-- Vertical diffusion at the first computational gridpoint along
	270	!-- z-direction
	271	!$acc loop vector( 32 )
	272	DO k = 1, nzt
	273	IF ( use_surface_fluxes .AND. k == nzb_s_inner(j,i)+1 ) THEN
	274	tend(k,j,i) = tend(k,j,i) &
	275	+ ( 0.5 * ( kh(k,j,i)+kh(k+1,j,i) ) &
	276	* ( s(k+1,j,i)-s(k,j,i) ) &
	277	* ddzu(k+1) &
	278	+ s_flux_b(j,i) &
	279	) * ddzw(k)
	280	ENDIF
	281
	282	!
	283	!-- Vertical diffusion at the last computational gridpoint along
	284	!-- z-direction
	285	IF ( use_top_fluxes .AND. k == nzt ) THEN
	286	tend(k,j,i) = tend(k,j,i) &
	287	+ ( - s_flux_t(j,i) &
	288	- 0.5 * ( kh(k-1,j,i)+kh(k,j,i) )&
	289	* ( s(k,j,i)-s(k-1,j,i) ) &
	290	* ddzu(k) &
	291	) * ddzw(k)
	292	ENDIF
	293	ENDDO
	294
	295	ENDDO
	296	ENDDO
	297	!$acc end kernels
	298
	299	END SUBROUTINE diffusion_s_acc
	300
	301
	302	!------------------------------------------------------------------------------!
[1]	303	! Call for grid point i,j
	304	!------------------------------------------------------------------------------!
[1001]	305	SUBROUTINE diffusion_s_ij( i, j, s, s_flux_b, s_flux_t, wall_s_flux )
[1]	306
[1001]	307	USE arrays_3d
[1]	308	USE control_parameters
	309	USE grid_variables
	310	USE indices
	311
	312	IMPLICIT NONE
	313
	314	INTEGER :: i, j, k
	315	REAL :: vertical_gridspace
[129]	316	REAL :: wall_s_flux(0:4)
[1001]	317	REAL, DIMENSION(nysg:nyng,nxlg:nxrg) :: s_flux_b, s_flux_t
[1010]	318	#if defined( __nopointer )
	319	REAL, DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: s
	320	#else
[1001]	321	REAL, DIMENSION(:,:,:), POINTER :: s
[1010]	322	#endif
[1]	323
	324	!
	325	!-- Compute horizontal diffusion
[19]	326	DO k = nzb_s_outer(j,i)+1, nzt
[1]	327
	328	tend(k,j,i) = tend(k,j,i) &
	329	+ 0.5 * ( &
	330	( kh(k,j,i) + kh(k,j,i+1) ) * ( s(k,j,i+1)-s(k,j,i) ) &
	331	- ( kh(k,j,i) + kh(k,j,i-1) ) * ( s(k,j,i)-s(k,j,i-1) ) &
	332	) * ddx2 &
	333	+ 0.5 * ( &
	334	( kh(k,j,i) + kh(k,j+1,i) ) * ( s(k,j+1,i)-s(k,j,i) ) &
	335	- ( kh(k,j,i) + kh(k,j-1,i) ) * ( s(k,j,i)-s(k,j-1,i) ) &
	336	) * ddy2
	337	ENDDO
	338
	339	!
	340	!-- Apply prescribed horizontal wall heatflux where necessary
	341	IF ( ( wall_w_x(j,i) .NE. 0.0 ) .OR. ( wall_w_y(j,i) .NE. 0.0 ) ) &
	342	THEN
	343	DO k = nzb_s_inner(j,i)+1, nzb_s_outer(j,i)
	344
	345	tend(k,j,i) = tend(k,j,i) &
[183]	346	+ ( fwxp(j,i) * 0.5 * &
[1]	347	( kh(k,j,i) + kh(k,j,i+1) ) * ( s(k,j,i+1)-s(k,j,i) ) &
[129]	348	+ ( 1.0 - fwxp(j,i) ) * wall_s_flux(1) &
[183]	349	-fwxm(j,i) * 0.5 * &
[1]	350	( kh(k,j,i) + kh(k,j,i-1) ) * ( s(k,j,i)-s(k,j,i-1) ) &
[129]	351	+ ( 1.0 - fwxm(j,i) ) * wall_s_flux(2) &
[1]	352	) * ddx2 &
[183]	353	+ ( fwyp(j,i) * 0.5 * &
[1]	354	( kh(k,j,i) + kh(k,j+1,i) ) * ( s(k,j+1,i)-s(k,j,i) ) &
[129]	355	+ ( 1.0 - fwyp(j,i) ) * wall_s_flux(3) &
[183]	356	-fwym(j,i) * 0.5 * &
[1]	357	( kh(k,j,i) + kh(k,j-1,i) ) * ( s(k,j,i)-s(k,j-1,i) ) &
[129]	358	+ ( 1.0 - fwym(j,i) ) * wall_s_flux(4) &
[1]	359	) * ddy2
	360	ENDDO
	361	ENDIF
	362
	363	!
	364	!-- Compute vertical diffusion. In case that surface fluxes have been
[19]	365	!-- prescribed or computed at bottom and/or top, index k starts/ends at
	366	!-- nzb+2 or nzt-1, respectively.
	367	DO k = nzb_diff_s_inner(j,i), nzt_diff
[1]	368
	369	tend(k,j,i) = tend(k,j,i) &
	370	+ 0.5 * ( &
	371	( kh(k,j,i) + kh(k+1,j,i) ) * ( s(k+1,j,i)-s(k,j,i) ) * ddzu(k+1) &
	372	- ( kh(k,j,i) + kh(k-1,j,i) ) * ( s(k,j,i)-s(k-1,j,i) ) * ddzu(k) &
	373	) * ddzw(k)
	374	ENDDO
	375
	376	!
[19]	377	!-- Vertical diffusion at the first computational gridpoint along z-direction
[1]	378	IF ( use_surface_fluxes ) THEN
	379
	380	k = nzb_s_inner(j,i)+1
	381
[19]	382	tend(k,j,i) = tend(k,j,i) + ( 0.5 * ( kh(k,j,i)+kh(k+1,j,i) ) &
	383	* ( s(k+1,j,i)-s(k,j,i) ) &
	384	* ddzu(k+1) &
	385	+ s_flux_b(j,i) &
	386	) * ddzw(k)
[1]	387
	388	ENDIF
	389
[19]	390	!
	391	!-- Vertical diffusion at the last computational gridpoint along z-direction
	392	IF ( use_top_fluxes ) THEN
	393
	394	k = nzt
	395
	396	tend(k,j,i) = tend(k,j,i) + ( - s_flux_t(j,i) &
	397	- 0.5 * ( kh(k-1,j,i)+kh(k,j,i) ) &
	398	* ( s(k,j,i)-s(k-1,j,i) ) &
	399	* ddzu(k) &
	400	) * ddzw(k)
	401
	402	ENDIF
	403
[1]	404	END SUBROUTINE diffusion_s_ij
	405
	406	END MODULE diffusion_s_mod

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