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source: palm/trunk/SOURCE/diffusion_w.f90 @ 3318

Last change on this file since 3318 was 3241, checked in by raasch, 6 years ago
various changes to avoid compiler warnings (mainly removal of unused variables)
Property svn:keywords set to `Id`
File size: 19.8 KB

Rev	Line
[1873]	1	!> @file diffusion_w.f90
[2000]	2	!------------------------------------------------------------------------------!
[2696]	3	! This file is part of the PALM model system.
[1036]	4	!
[2000]	5	! PALM is free software: you can redistribute it and/or modify it under the
	6	! terms of the GNU General Public License as published by the Free Software
	7	! Foundation, either version 3 of the License, or (at your option) any later
	8	! version.
[1036]	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	!
[2718]	17	! Copyright 1997-2018 Leibniz Universitaet Hannover
[2000]	18	!------------------------------------------------------------------------------!
[1036]	19	!
[484]	20	! Current revisions:
[1]	21	! -----------------
[1341]	22	!
[2233]	23	!
[1321]	24	! Former revisions:
	25	! -----------------
	26	! $Id: diffusion_w.f90 3241 2018-09-12 15:02:00Z sward $
[3241]	27	! unused variables removed
	28	!
	29	! 2718 2018-01-02 08:49:38Z maronga
[2716]	30	! Corrected "Former revisions" section
	31	!
	32	! 2696 2017-12-14 17:12:51Z kanani
	33	! Change in file header (GPL part)
[1321]	34	!
[2716]	35	! 2233 2017-05-30 18:08:54Z suehring
	36	!
[2233]	37	! 2232 2017-05-30 17:47:52Z suehring
	38	! Adjustments to new topography and surface concept
	39	!
[2119]	40	! 2118 2017-01-17 16:38:49Z raasch
	41	! OpenACC version of subroutine removed
	42	!
[2038]	43	! 2037 2016-10-26 11:15:40Z knoop
	44	! Anelastic approximation implemented
	45	!
[2001]	46	! 2000 2016-08-20 18:09:15Z knoop
	47	! Forced header and separation lines into 80 columns
	48	!
[1874]	49	! 1873 2016-04-18 14:50:06Z maronga
	50	! Module renamed (removed _mod)
	51	!
[1851]	52	! 1850 2016-04-08 13:29:27Z maronga
	53	! Module renamed
	54	!
[1683]	55	! 1682 2015-10-07 23:56:08Z knoop
	56	! Code annotations made doxygen readable
	57	!
[1375]	58	! 1374 2014-04-25 12:55:07Z raasch
	59	! vsws + vswst removed from acc-present-list
	60	!
[1354]	61	! 1353 2014-04-08 15:21:23Z heinze
	62	! REAL constants provided with KIND-attribute
	63	!
[1341]	64	! 1340 2014-03-25 19:45:13Z kanani
	65	! REAL constants defined as wp-kind
	66	!
[1323]	67	! 1322 2014-03-20 16:38:49Z raasch
	68	! REAL constants defined as wp-kind
	69	!
[1321]	70	! 1320 2014-03-20 08:40:49Z raasch
[1320]	71	! ONLY-attribute added to USE-statements,
	72	! kind-parameters added to all INTEGER and REAL declaration statements,
	73	! kinds are defined in new module kinds,
	74	! revision history before 2012 removed,
	75	! comment fields (!:) to be used for variable explanations added to
	76	! all variable declaration statements
[1]	77	!
[1258]	78	! 1257 2013-11-08 15:18:40Z raasch
	79	! openacc loop and loop vector clauses removed, declare create moved after
	80	! the FORTRAN declaration statement
	81	!
[1132]	82	! 1128 2013-04-12 06:19:32Z raasch
	83	! loop index bounds in accelerator version replaced by i_left, i_right, j_south,
	84	! j_north
	85	!
[1037]	86	! 1036 2012-10-22 13:43:42Z raasch
	87	! code put under GPL (PALM 3.9)
	88	!
[1017]	89	! 1015 2012-09-27 09:23:24Z raasch
	90	! accelerator version (*_acc) added
	91	!
[1002]	92	! 1001 2012-09-13 14:08:46Z raasch
	93	! arrays comunicated by module instead of parameter list
	94	!
[979]	95	! 978 2012-08-09 08:28:32Z fricke
	96	! outflow damping layer removed
	97	! kmxm_x/_z and kmxp_x/_z change to kmxm and kmxp
	98	! kmym_y/_z and kmyp_y/_z change to kmym and kmyp
	99	!
[1]	100	! Revision 1.1 1997/09/12 06:24:11 raasch
	101	! Initial revision
	102	!
	103	!
	104	! Description:
	105	! ------------
[1682]	106	!> Diffusion term of the w-component
[1]	107	!------------------------------------------------------------------------------!
[1682]	108	MODULE diffusion_w_mod
	109
[1]	110
	111	PRIVATE
[2118]	112	PUBLIC diffusion_w
[1]	113
	114	INTERFACE diffusion_w
	115	MODULE PROCEDURE diffusion_w
	116	MODULE PROCEDURE diffusion_w_ij
	117	END INTERFACE diffusion_w
	118
	119	CONTAINS
	120
	121
	122	!------------------------------------------------------------------------------!
[1682]	123	! Description:
	124	! ------------
	125	!> Call for all grid points
[1]	126	!------------------------------------------------------------------------------!
[1001]	127	SUBROUTINE diffusion_w
[1]	128
[1320]	129	USE arrays_3d, &
[2037]	130	ONLY : ddzu, ddzw, km, tend, u, v, w, drho_air_zw, rho_air
[1320]	131
	132	USE grid_variables, &
[2232]	133	ONLY : ddx, ddy
[1320]	134
	135	USE indices, &
[2232]	136	ONLY : nxl, nxr, nyn, nys, nzb, nzt, wall_flags_0
[1320]	137
	138	USE kinds
[1]	139
[2232]	140	USE surface_mod, &
	141	ONLY : surf_def_v, surf_lsm_v, surf_usm_v
	142
[1]	143	IMPLICIT NONE
	144
[2232]	145	INTEGER(iwp) :: i !< running index x direction
	146	INTEGER(iwp) :: j !< running index y direction
	147	INTEGER(iwp) :: k !< running index z direction
	148	INTEGER(iwp) :: l !< running index of surface type, south- or north-facing wall
	149	INTEGER(iwp) :: m !< running index surface elements
	150	INTEGER(iwp) :: surf_e !< End index of surface elements at (j,i)-gridpoint
	151	INTEGER(iwp) :: surf_s !< Start index of surface elements at (j,i)-gridpoint
[1320]	152
[2232]	153	REAL(wp) :: flag !< flag to mask topography grid points
	154	REAL(wp) :: kmxm !<
	155	REAL(wp) :: kmxp !<
	156	REAL(wp) :: kmym !<
	157	REAL(wp) :: kmyp !<
	158	REAL(wp) :: mask_west !< flag to mask vertical wall west of the grid point
	159	REAL(wp) :: mask_east !< flag to mask vertical wall east of the grid point
	160	REAL(wp) :: mask_south !< flag to mask vertical wall south of the grid point
	161	REAL(wp) :: mask_north !< flag to mask vertical wall north of the grid point
[1001]	162
[1]	163
	164
	165	DO i = nxl, nxr
	166	DO j = nys, nyn
[2232]	167	DO k = nzb+1, nzt-1
[1]	168	!
[2232]	169	!-- Predetermine flag to mask topography and wall-bounded grid points.
	170	flag = MERGE( 1.0_wp, 0.0_wp, &
	171	BTEST( wall_flags_0(k,j,i), 3 ) )
	172	mask_east = MERGE( 1.0_wp, 0.0_wp, &
	173	BTEST( wall_flags_0(k,j,i+1), 3 ) )
	174	mask_west = MERGE( 1.0_wp, 0.0_wp, &
	175	BTEST( wall_flags_0(k,j,i-1), 3 ) )
	176	mask_south = MERGE( 1.0_wp, 0.0_wp, &
	177	BTEST( wall_flags_0(k,j-1,i), 3 ) )
	178	mask_north = MERGE( 1.0_wp, 0.0_wp, &
	179	BTEST( wall_flags_0(k,j+1,i), 3 ) )
	180	!
[1]	181	!-- Interpolate eddy diffusivities on staggered gridpoints
[2232]	182	kmxp = 0.25_wp * ( km(k,j,i) + km(k,j,i+1) + &
	183	km(k+1,j,i) + km(k+1,j,i+1) )
	184	kmxm = 0.25_wp * ( km(k,j,i) + km(k,j,i-1) + &
	185	km(k+1,j,i) + km(k+1,j,i-1) )
	186	kmyp = 0.25_wp * ( km(k,j,i) + km(k+1,j,i) + &
	187	km(k,j+1,i) + km(k+1,j+1,i) )
	188	kmym = 0.25_wp * ( km(k,j,i) + km(k+1,j,i) + &
	189	km(k,j-1,i) + km(k+1,j-1,i) )
[1]	190
	191	tend(k,j,i) = tend(k,j,i) &
[2232]	192	+ ( mask_east * kmxp * ( &
	193	( w(k,j,i+1) - w(k,j,i) ) * ddx &
	194	+ ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	195	) &
	196	- mask_west * kmxm * ( &
	197	( w(k,j,i) - w(k,j,i-1) ) * ddx &
	198	+ ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
	199	) &
	200	) * ddx * flag &
	201	+ ( mask_north * kmyp * ( &
	202	( w(k,j+1,i) - w(k,j,i) ) * ddy &
	203	+ ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	204	) &
	205	- mask_south * kmym * ( &
	206	( w(k,j,i) - w(k,j-1,i) ) * ddy &
	207	+ ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
	208	) &
	209	) * ddy * flag &
	210	+ 2.0_wp * ( &
	211	km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	212	* rho_air(k+1) &
	213	- km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
	214	* rho_air(k) &
	215	) * ddzu(k+1) * drho_air_zw(k) * flag
[1]	216	ENDDO
	217
	218	!
[2232]	219	!-- Add horizontal momentum flux v'w' at north- (l=0) and south-facing (l=1)
	220	!-- surfaces. Note, in the the flat case, loops won't be entered as
	221	!-- start_index > end_index. Furtermore, note, no vertical natural surfaces
	222	!-- so far.
	223	!-- Default-type surfaces
	224	DO l = 0, 1
	225	surf_s = surf_def_v(l)%start_index(j,i)
	226	surf_e = surf_def_v(l)%end_index(j,i)
	227	DO m = surf_s, surf_e
	228	k = surf_def_v(l)%k(m)
	229	tend(k,j,i) = tend(k,j,i) + &
	230	surf_def_v(l)%mom_flux_w(m) * ddy
	231	ENDDO
	232	ENDDO
[1]	233	!
[2232]	234	!-- Natural-type surfaces
	235	DO l = 0, 1
	236	surf_s = surf_lsm_v(l)%start_index(j,i)
	237	surf_e = surf_lsm_v(l)%end_index(j,i)
	238	DO m = surf_s, surf_e
	239	k = surf_lsm_v(l)%k(m)
	240	tend(k,j,i) = tend(k,j,i) + &
	241	surf_lsm_v(l)%mom_flux_w(m) * ddy
	242	ENDDO
	243	ENDDO
	244	!
	245	!-- Urban-type surfaces
	246	DO l = 0, 1
	247	surf_s = surf_usm_v(l)%start_index(j,i)
	248	surf_e = surf_usm_v(l)%end_index(j,i)
	249	DO m = surf_s, surf_e
	250	k = surf_usm_v(l)%k(m)
	251	tend(k,j,i) = tend(k,j,i) + &
	252	surf_usm_v(l)%mom_flux_w(m) * ddy
	253	ENDDO
	254	ENDDO
	255	!
	256	!-- Add horizontal momentum flux u'w' at east- (l=2) and west-facing (l=3)
	257	!-- surface.
	258	!-- Default-type surfaces
	259	DO l = 2, 3
	260	surf_s = surf_def_v(l)%start_index(j,i)
	261	surf_e = surf_def_v(l)%end_index(j,i)
	262	DO m = surf_s, surf_e
	263	k = surf_def_v(l)%k(m)
	264	tend(k,j,i) = tend(k,j,i) + &
	265	surf_def_v(l)%mom_flux_w(m) * ddx
	266	ENDDO
	267	ENDDO
	268	!
	269	!-- Natural-type surfaces
	270	DO l = 2, 3
	271	surf_s = surf_lsm_v(l)%start_index(j,i)
	272	surf_e = surf_lsm_v(l)%end_index(j,i)
	273	DO m = surf_s, surf_e
	274	k = surf_lsm_v(l)%k(m)
	275	tend(k,j,i) = tend(k,j,i) + &
	276	surf_lsm_v(l)%mom_flux_w(m) * ddx
	277	ENDDO
	278	ENDDO
	279	!
	280	!-- Urban-type surfaces
	281	DO l = 2, 3
	282	surf_s = surf_usm_v(l)%start_index(j,i)
	283	surf_e = surf_usm_v(l)%end_index(j,i)
	284	DO m = surf_s, surf_e
	285	k = surf_usm_v(l)%k(m)
	286	tend(k,j,i) = tend(k,j,i) + &
	287	surf_usm_v(l)%mom_flux_w(m) * ddx
	288	ENDDO
	289	ENDDO
[1]	290
	291	ENDDO
	292	ENDDO
	293
	294	END SUBROUTINE diffusion_w
	295
	296
	297	!------------------------------------------------------------------------------!
[1682]	298	! Description:
	299	! ------------
	300	!> Call for grid point i,j
[1]	301	!------------------------------------------------------------------------------!
[1001]	302	SUBROUTINE diffusion_w_ij( i, j )
[1]	303
[1320]	304	USE arrays_3d, &
[2037]	305	ONLY : ddzu, ddzw, km, tend, u, v, w, drho_air_zw, rho_air
[1320]	306
	307	USE grid_variables, &
[2232]	308	ONLY : ddx, ddy
[1320]	309
	310	USE indices, &
[3241]	311	ONLY : nzb, nzt, wall_flags_0
[1320]	312
	313	USE kinds
[1]	314
[2232]	315	USE surface_mod, &
	316	ONLY : surf_def_v, surf_lsm_v, surf_usm_v
	317
[1]	318	IMPLICIT NONE
	319
[2232]	320
	321	INTEGER(iwp) :: i !< running index x direction
	322	INTEGER(iwp) :: j !< running index y direction
	323	INTEGER(iwp) :: k !< running index z direction
	324	INTEGER(iwp) :: l !< running index of surface type, south- or north-facing wall
	325	INTEGER(iwp) :: m !< running index surface elements
	326	INTEGER(iwp) :: surf_e !< End index of surface elements at (j,i)-gridpoint
	327	INTEGER(iwp) :: surf_s !< Start index of surface elements at (j,i)-gridpoint
[1320]	328
[2232]	329	REAL(wp) :: flag !< flag to mask topography grid points
	330	REAL(wp) :: kmxm !<
	331	REAL(wp) :: kmxp !<
	332	REAL(wp) :: kmym !<
	333	REAL(wp) :: kmyp !<
	334	REAL(wp) :: mask_west !< flag to mask vertical wall west of the grid point
	335	REAL(wp) :: mask_east !< flag to mask vertical wall east of the grid point
	336	REAL(wp) :: mask_south !< flag to mask vertical wall south of the grid point
	337	REAL(wp) :: mask_north !< flag to mask vertical wall north of the grid point
[1]	338
	339
[2232]	340	DO k = nzb+1, nzt-1
[1]	341	!
[2232]	342	!-- Predetermine flag to mask topography and wall-bounded grid points.
	343	flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j,i), 3 ) )
	344	mask_east = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j,i+1), 3 ) )
	345	mask_west = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j,i-1), 3 ) )
	346	mask_south = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j-1,i), 3 ) )
	347	mask_north = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j+1,i), 3 ) )
	348	!
[1]	349	!-- Interpolate eddy diffusivities on staggered gridpoints
[1322]	350	kmxp = 0.25_wp * ( km(k,j,i)+km(k,j,i+1)+km(k+1,j,i)+km(k+1,j,i+1) )
	351	kmxm = 0.25_wp * ( km(k,j,i)+km(k,j,i-1)+km(k+1,j,i)+km(k+1,j,i-1) )
	352	kmyp = 0.25_wp * ( km(k,j,i)+km(k+1,j,i)+km(k,j+1,i)+km(k+1,j+1,i) )
	353	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]	354
	355	tend(k,j,i) = tend(k,j,i) &
[2232]	356	+ ( mask_east * kmxp * ( &
	357	( w(k,j,i+1) - w(k,j,i) ) * ddx &
	358	+ ( u(k+1,j,i+1) - u(k,j,i+1) ) * ddzu(k+1) &
	359	) &
	360	- mask_west * kmxm * ( &
	361	( w(k,j,i) - w(k,j,i-1) ) * ddx &
	362	+ ( u(k+1,j,i) - u(k,j,i) ) * ddzu(k+1) &
	363	) &
	364	) * ddx * flag &
	365	+ ( mask_north * kmyp * ( &
	366	( w(k,j+1,i) - w(k,j,i) ) * ddy &
	367	+ ( v(k+1,j+1,i) - v(k,j+1,i) ) * ddzu(k+1) &
	368	) &
	369	- mask_south * kmym * ( &
	370	( w(k,j,i) - w(k,j-1,i) ) * ddy &
	371	+ ( v(k+1,j,i) - v(k,j,i) ) * ddzu(k+1) &
	372	) &
	373	) * ddy * flag &
	374	+ 2.0_wp * ( &
	375	km(k+1,j,i) * ( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1) &
	376	* rho_air(k+1) &
	377	- km(k,j,i) * ( w(k,j,i) - w(k-1,j,i) ) * ddzw(k) &
	378	* rho_air(k) &
	379	) * ddzu(k+1) * drho_air_zw(k) * flag
[1]	380	ENDDO
	381	!
[2232]	382	!-- Add horizontal momentum flux v'w' at north- (l=0) and south-facing (l=1)
	383	!-- surfaces. Note, in the the flat case, loops won't be entered as
	384	!-- start_index > end_index. Furtermore, note, no vertical natural surfaces
	385	!-- so far.
	386	!-- Default-type surfaces
	387	DO l = 0, 1
	388	surf_s = surf_def_v(l)%start_index(j,i)
	389	surf_e = surf_def_v(l)%end_index(j,i)
	390	DO m = surf_s, surf_e
	391	k = surf_def_v(l)%k(m)
	392	tend(k,j,i) = tend(k,j,i) + &
	393	surf_def_v(l)%mom_flux_w(m) * ddy
	394	ENDDO
	395	ENDDO
[51]	396	!
[2232]	397	!-- Natural-type surfaces
	398	DO l = 0, 1
	399	surf_s = surf_lsm_v(l)%start_index(j,i)
	400	surf_e = surf_lsm_v(l)%end_index(j,i)
	401	DO m = surf_s, surf_e
	402	k = surf_lsm_v(l)%k(m)
	403	tend(k,j,i) = tend(k,j,i) + &
	404	surf_lsm_v(l)%mom_flux_w(m) * ddy
	405	ENDDO
	406	ENDDO
[1]	407	!
[2232]	408	!-- Urban-type surfaces
	409	DO l = 0, 1
	410	surf_s = surf_usm_v(l)%start_index(j,i)
	411	surf_e = surf_usm_v(l)%end_index(j,i)
	412	DO m = surf_s, surf_e
	413	k = surf_usm_v(l)%k(m)
	414	tend(k,j,i) = tend(k,j,i) + &
	415	surf_usm_v(l)%mom_flux_w(m) * ddy
	416	ENDDO
	417	ENDDO
	418	!
	419	!-- Add horizontal momentum flux u'w' at east- (l=2) and west-facing (l=3)
	420	!-- surfaces.
	421	!-- Default-type surfaces
	422	DO l = 2, 3
	423	surf_s = surf_def_v(l)%start_index(j,i)
	424	surf_e = surf_def_v(l)%end_index(j,i)
	425	DO m = surf_s, surf_e
	426	k = surf_def_v(l)%k(m)
	427	tend(k,j,i) = tend(k,j,i) + &
	428	surf_def_v(l)%mom_flux_w(m) * ddx
	429	ENDDO
	430	ENDDO
	431	!
	432	!-- Natural-type surfaces
	433	DO l = 2, 3
	434	surf_s = surf_lsm_v(l)%start_index(j,i)
	435	surf_e = surf_lsm_v(l)%end_index(j,i)
	436	DO m = surf_s, surf_e
	437	k = surf_lsm_v(l)%k(m)
	438	tend(k,j,i) = tend(k,j,i) + &
	439	surf_lsm_v(l)%mom_flux_w(m) * ddx
	440	ENDDO
	441	ENDDO
	442	!
	443	!-- Urban-type surfaces
	444	DO l = 2, 3
	445	surf_s = surf_usm_v(l)%start_index(j,i)
	446	surf_e = surf_usm_v(l)%end_index(j,i)
	447	DO m = surf_s, surf_e
	448	k = surf_usm_v(l)%k(m)
	449	tend(k,j,i) = tend(k,j,i) + &
	450	surf_usm_v(l)%mom_flux_w(m) * ddx
	451	ENDDO
	452	ENDDO
[1]	453
	454
	455	END SUBROUTINE diffusion_w_ij
	456
[1323]	457	END MODULE diffusion_w_mod

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