Home

Context Navigation

source: palm/trunk/SOURCE/init_grid.f90 @ 1574

Last change on this file since 1574 was 1558, checked in by suehring, 10 years ago
last commit documented
Property svn:keywords set to `Id`
File size: 60.5 KB

Rev	Line
[1]	1	SUBROUTINE init_grid
	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	!
[1310]	17	! Copyright 1997-2014 Leibniz Universitaet Hannover
[1036]	18	!--------------------------------------------------------------------------------!
	19	!
[254]	20	! Current revisions:
[1]	21	! -----------------
[1354]	22	!
[1558]	23	!
[1321]	24	! Former revisions:
	25	! -----------------
	26	! $Id: init_grid.f90 1558 2015-03-05 16:51:41Z suehring $
	27	!
[1558]	28	! 1557 2015-03-05 16:43:04Z suehring
	29	! Adjustment for monotoinic limiter
	30	!
[1419]	31	! 1418 2014-06-06 13:05:08Z fricke
	32	! Bugfix: Change if-condition for stretched grid in the ocean, with the old
	33	! condition and a negative value for dz_stretch_level the condition
	34	! was always true for the whole model domain
	35	!
[1410]	36	! 1409 2014-05-23 12:11:32Z suehring
	37	! Bugfix: set wall_flags_0 at inflow and outflow boundary also for i <= nxlu
	38	! j <= nysv
	39	!
[1354]	40	! 1353 2014-04-08 15:21:23Z heinze
	41	! REAL constants provided with KIND-attribute
	42	!
[1323]	43	! 1322 2014-03-20 16:38:49Z raasch
	44	! REAL constants defined as wp-kind
	45	!
[1321]	46	! 1320 2014-03-20 08:40:49Z raasch
[1320]	47	! ONLY-attribute added to USE-statements,
	48	! kind-parameters added to all INTEGER and REAL declaration statements,
	49	! kinds are defined in new module kinds,
	50	! revision history before 2012 removed,
	51	! comment fields (!:) to be used for variable explanations added to
	52	! all variable declaration statements
[1321]	53	!
[1222]	54	! 1221 2013-09-10 08:59:13Z raasch
	55	! wall_flags_00 introduced to hold bits 32-63,
	56	! additional 3D-flag arrays for replacing the 2D-index array nzb_s_inner in
	57	! loops optimized for openACC (pres + flow_statistics)
	58	!
[1093]	59	! 1092 2013-02-02 11:24:22Z raasch
	60	! unused variables removed
	61	!
[1070]	62	! 1069 2012-11-28 16:18:43Z maronga
	63	! bugfix: added coupling_char to TOPOGRAPHY_DATA to allow topography in the ocean
	64	! model in case of coupled runs
	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	! lower index for calculating wall_flags_0 set to nzb_w_inner instead of
	71	! nzb_w_inner+1
	72	!
[997]	73	! 996 2012-09-07 10:41:47Z raasch
	74	! little reformatting
	75	!
[979]	76	! 978 2012-08-09 08:28:32Z fricke
	77	! Bugfix: nzb_max is set to nzt at non-cyclic lateral boundaries
	78	! Bugfix: Set wall_flags_0 for inflow boundary
	79	!
[928]	80	! 927 2012-06-06 19:15:04Z raasch
	81	! Wall flags are not set for multigrid method in case of masking method
	82	!
[865]	83	! 864 2012-03-27 15:10:33Z gryschka
[927]	84	! In case of ocean and Dirichlet bottom bc for u and v dzu_mg and ddzu_pres
	85	! were not correctly defined for k=1.
[865]	86	!
[863]	87	! 861 2012-03-26 14:18:34Z suehring
[861]	88	! Set wall_flags_0. The array is needed for degradation in ws-scheme near walls,
	89	! inflow and outflow boundaries as well as near the bottom and the top of the
[863]	90	! model domain.!
[861]	91	! Initialization of nzb_s_inner and nzb_w_inner.
	92	! gls has to be at least nbgp to do not exceed the array bounds of nzb_local
	93	! while setting wall_flags_0
	94	!
[844]	95	! 843 2012-02-29 15:16:21Z gryschka
	96	! In case of ocean and dirichlet bc for u and v at the bottom
	97	! the first u-level ist defined at same height as the first w-level
	98	!
[819]	99	! 818 2012-02-08 16:11:23Z maronga
	100	! Bugfix: topo_height is only required if topography is used. It is thus now
	101	! allocated in the topography branch
	102	!
[810]	103	! 809 2012-01-30 13:32:58Z maronga
	104	! Bugfix: replaced .AND. and .NOT. with && and ! in the preprocessor directives
	105	!
[808]	106	! 807 2012-01-25 11:53:51Z maronga
	107	! New cpp directive "__check" implemented which is used by check_namelist_files
	108	!
[1]	109	! Revision 1.1 1997/08/11 06:17:45 raasch
	110	! Initial revision (Testversion)
	111	!
	112	!
	113	! Description:
	114	! ------------
	115	! Creating grid depending constants
	116	!------------------------------------------------------------------------------!
	117
[1320]	118	USE arrays_3d, &
	119	ONLY: dd2zu, ddzu, ddzu_pres, ddzw, dzu, dzu_mg, dzw, dzw_mg, f1_mg, &
	120	f2_mg, f3_mg, l_grid, l_wall, zu, zw
	121
[1353]	122	USE control_parameters, &
[1320]	123	ONLY: bc_lr, bc_ns, building_height, building_length_x, &
	124	building_length_y, building_wall_left, building_wall_south, &
	125	canyon_height, canyon_wall_left, canyon_wall_south, &
	126	canyon_width_x, canyon_width_y, coupling_char, dp_level_ind_b, &
	127	dz, dz_max, dz_stretch_factor, dz_stretch_level, &
	128	dz_stretch_level_index, ibc_uv_b, io_blocks, io_group, &
	129	inflow_l, inflow_n, inflow_r, inflow_s, masking_method, &
	130	maximum_grid_level, message_string, momentum_advec, ocean, &
	131	outflow_l, outflow_n, outflow_r, outflow_s, prandtl_layer, &
	132	psolver, scalar_advec, topography, topography_grid_convention, &
	133	use_surface_fluxes, use_top_fluxes, wall_adjustment_factor
	134
	135	USE grid_variables, &
	136	ONLY: ddx, ddx2, ddx2_mg, ddy, ddy2, ddy2_mg, dx, dx2, dy, dy2, fwxm, &
	137	fwxp, fwym, fwyp, fxm, fxp, fym, fyp, wall_e_x, wall_e_y, &
	138	wall_u, wall_v, wall_w_x, wall_w_y, zu_s_inner, zw_w_inner
	139
	140	USE indices, &
	141	ONLY: flags, nbgp, nx, nxl, nxlg, nxlu, nxl_mg, nxr, nxrg, nxr_mg, &
	142	ny, nyn, nyng, nyn_mg, nys, nysv, nys_mg, nysg, nz, nzb, &
	143	nzb_2d, nzb_diff, nzb_diff_s_inner, nzb_diff_s_outer, &
	144	nzb_diff_u, nzb_diff_v, nzb_max, nzb_s_inner, nzb_s_outer, &
	145	nzb_u_inner, nzb_u_outer, nzb_v_inner, nzb_v_outer, &
	146	nzb_w_inner, nzb_w_outer, nzt, nzt_diff, nzt_mg, rflags_invers, &
	147	rflags_s_inner, wall_flags_0, wall_flags_00, wall_flags_1, &
	148	wall_flags_10, wall_flags_2, wall_flags_3, wall_flags_4, &
	149	wall_flags_5, wall_flags_6, wall_flags_7, wall_flags_8, &
	150	wall_flags_9
	151
	152	USE kinds
	153
[1]	154	USE pegrid
	155
	156	IMPLICIT NONE
	157
[1320]	158	INTEGER(iwp) :: bh !:
	159	INTEGER(iwp) :: blx !:
	160	INTEGER(iwp) :: bly !:
	161	INTEGER(iwp) :: bxl !:
	162	INTEGER(iwp) :: bxr !:
	163	INTEGER(iwp) :: byn !:
	164	INTEGER(iwp) :: bys !:
	165	INTEGER(iwp) :: ch !:
	166	INTEGER(iwp) :: cwx !:
	167	INTEGER(iwp) :: cwy !:
	168	INTEGER(iwp) :: cxl !:
	169	INTEGER(iwp) :: cxr !:
	170	INTEGER(iwp) :: cyn !:
	171	INTEGER(iwp) :: cys !:
	172	INTEGER(iwp) :: gls !:
	173	INTEGER(iwp) :: i !:
	174	INTEGER(iwp) :: ii !:
	175	INTEGER(iwp) :: inc !:
	176	INTEGER(iwp) :: j !:
	177	INTEGER(iwp) :: k !:
	178	INTEGER(iwp) :: l !:
	179	INTEGER(iwp) :: nxl_l !:
	180	INTEGER(iwp) :: nxr_l !:
	181	INTEGER(iwp) :: nyn_l !:
	182	INTEGER(iwp) :: nys_l !:
	183	INTEGER(iwp) :: nzb_si !:
	184	INTEGER(iwp) :: nzt_l !:
	185	INTEGER(iwp) :: vi !:
[1]	186
[1320]	187	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: vertical_influence !:
[1]	188
[1320]	189	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: corner_nl !:
	190	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: corner_nr !:
	191	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: corner_sl !:
	192	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: corner_sr !:
	193	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: wall_l !:
	194	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: wall_n !:
	195	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: wall_r !:
	196	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: wall_s !:
	197	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: nzb_local !:
	198	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: nzb_tmp !:
[1]	199
[1320]	200	LOGICAL :: flag_set = .FALSE. !:
[861]	201
[1320]	202	REAL(wp) :: dx_l !:
	203	REAL(wp) :: dy_l !:
	204	REAL(wp) :: dz_stretched !:
[1]	205
[1320]	206	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: topo_height !:
[1]	207
[667]	208
[1]	209	!
[709]	210	!-- Calculation of horizontal array bounds including ghost layers
[667]	211	nxlg = nxl - nbgp
	212	nxrg = nxr + nbgp
	213	nysg = nys - nbgp
	214	nyng = nyn + nbgp
[709]	215
[667]	216	!
[1]	217	!-- Allocate grid arrays
[1353]	218	ALLOCATE( ddzu(1:nzt+1), ddzw(1:nzt+1), dd2zu(1:nzt), dzu(1:nzt+1), &
[667]	219	dzw(1:nzt+1), l_grid(1:nzt), zu(nzb:nzt+1), zw(nzb:nzt+1) )
[1]	220
	221	!
	222	!-- Compute height of u-levels from constant grid length and dz stretch factors
[1353]	223	IF ( dz == -1.0_wp ) THEN
[254]	224	message_string = 'missing dz'
	225	CALL message( 'init_grid', 'PA0200', 1, 2, 0, 6, 0 )
[1353]	226	ELSEIF ( dz <= 0.0_wp ) THEN
[254]	227	WRITE( message_string, * ) 'dz=',dz,' <= 0.0'
	228	CALL message( 'init_grid', 'PA0201', 1, 2, 0, 6, 0 )
[1]	229	ENDIF
[94]	230
[1]	231	!
[94]	232	!-- Define the vertical grid levels
	233	IF ( .NOT. ocean ) THEN
	234	!
	235	!-- Grid for atmosphere with surface at z=0 (k=0, w-grid).
[843]	236	!-- The second u-level (k=1) corresponds to the top of the
[94]	237	!-- Prandtl-layer.
[667]	238
	239	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2 ) THEN
[1353]	240	zu(0) = 0.0_wp
	241	! zu(0) = - dz * 0.5_wp
[667]	242	ELSE
[1353]	243	zu(0) = - dz * 0.5_wp
[667]	244	ENDIF
[1353]	245	zu(1) = dz * 0.5_wp
[1]	246
[94]	247	dz_stretch_level_index = nzt+1
	248	dz_stretched = dz
	249	DO k = 2, nzt+1
	250	IF ( dz_stretch_level <= zu(k-1) .AND. dz_stretched < dz_max ) THEN
	251	dz_stretched = dz_stretched * dz_stretch_factor
	252	dz_stretched = MIN( dz_stretched, dz_max )
	253	IF ( dz_stretch_level_index == nzt+1 ) dz_stretch_level_index = k-1
	254	ENDIF
	255	zu(k) = zu(k-1) + dz_stretched
	256	ENDDO
[1]	257
	258	!
[94]	259	!-- Compute the w-levels. They are always staggered half-way between the
[843]	260	!-- corresponding u-levels. In case of dirichlet bc for u and v at the
	261	!-- ground the first u- and w-level (k=0) are defined at same height (z=0).
	262	!-- The top w-level is extrapolated linearly.
[1353]	263	zw(0) = 0.0_wp
[94]	264	DO k = 1, nzt
[1353]	265	zw(k) = ( zu(k) + zu(k+1) ) * 0.5_wp
[94]	266	ENDDO
[1353]	267	zw(nzt+1) = zw(nzt) + 2.0_wp * ( zu(nzt+1) - zw(nzt) )
[1]	268
[94]	269	ELSE
[1]	270	!
[843]	271	!-- Grid for ocean with free water surface is at k=nzt (w-grid).
	272	!-- In case of neumann bc at the ground the first first u-level (k=0) lies
	273	!-- below the first w-level (k=0). In case of dirichlet bc the first u- and
	274	!-- w-level are defined at same height, but staggered from the second level.
	275	!-- The second u-level (k=1) corresponds to the top of the Prandtl-layer.
[1353]	276	zu(nzt+1) = dz * 0.5_wp
	277	zu(nzt) = - dz * 0.5_wp
[94]	278
	279	dz_stretch_level_index = 0
	280	dz_stretched = dz
	281	DO k = nzt-1, 0, -1
[1418]	282	!
	283	!-- The default value of dz_stretch_level is positive, thus the first
	284	!-- condition is always true. Hence, the second condition is necessary.
	285	IF ( dz_stretch_level >= zu(k+1) .AND. dz_stretch_level <= 0.0 &
	286	.AND. dz_stretched < dz_max ) THEN
[94]	287	dz_stretched = dz_stretched * dz_stretch_factor
	288	dz_stretched = MIN( dz_stretched, dz_max )
	289	IF ( dz_stretch_level_index == 0 ) dz_stretch_level_index = k+1
	290	ENDIF
	291	zu(k) = zu(k+1) - dz_stretched
	292	ENDDO
	293
	294	!
	295	!-- Compute the w-levels. They are always staggered half-way between the
[843]	296	!-- corresponding u-levels, except in case of dirichlet bc for u and v
	297	!-- at the ground. In this case the first u- and w-level are defined at
	298	!-- same height. The top w-level (nzt+1) is not used but set for
	299	!-- consistency, since w and all scalar variables are defined up tp nzt+1.
[94]	300	zw(nzt+1) = dz
[1353]	301	zw(nzt) = 0.0_wp
[94]	302	DO k = 0, nzt
[1353]	303	zw(k) = ( zu(k) + zu(k+1) ) * 0.5_wp
[94]	304	ENDDO
	305
[843]	306	!
	307	!-- In case of dirichlet bc for u and v the first u- and w-level are defined
	308	!-- at same height.
	309	IF ( ibc_uv_b == 0 ) THEN
	310	zu(0) = zw(0)
	311	ENDIF
	312
[94]	313	ENDIF
	314
	315	!
[1]	316	!-- Compute grid lengths.
	317	DO k = 1, nzt+1
	318	dzu(k) = zu(k) - zu(k-1)
[1353]	319	ddzu(k) = 1.0_wp / dzu(k)
[1]	320	dzw(k) = zw(k) - zw(k-1)
[1353]	321	ddzw(k) = 1.0_wp / dzw(k)
[1]	322	ENDDO
	323
	324	DO k = 1, nzt
[1353]	325	dd2zu(k) = 1.0_wp / ( dzu(k) + dzu(k+1) )
[1]	326	ENDDO
[667]	327
	328	!
[709]	329	!-- The FFT- SOR-pressure solvers assume grid spacings of a staggered grid
	330	!-- everywhere. For the actual grid, the grid spacing at the lowest level
	331	!-- is only dz/2, but should be dz. Therefore, an additional array
	332	!-- containing with appropriate grid information is created for these
	333	!-- solvers.
	334	IF ( psolver /= 'multigrid' ) THEN
[667]	335	ALLOCATE( ddzu_pres(1:nzt+1) )
	336	ddzu_pres = ddzu
[864]	337	ddzu_pres(1) = ddzu_pres(2) ! change for lowest level
[667]	338	ENDIF
[1]	339
	340	!
	341	!-- In case of multigrid method, compute grid lengths and grid factors for the
	342	!-- grid levels
	343	IF ( psolver == 'multigrid' ) THEN
	344
	345	ALLOCATE( ddx2_mg(maximum_grid_level), ddy2_mg(maximum_grid_level), &
	346	dzu_mg(nzb+1:nzt+1,maximum_grid_level), &
	347	dzw_mg(nzb+1:nzt+1,maximum_grid_level), &
	348	f1_mg(nzb+1:nzt,maximum_grid_level), &
	349	f2_mg(nzb+1:nzt,maximum_grid_level), &
	350	f3_mg(nzb+1:nzt,maximum_grid_level) )
	351
	352	dzu_mg(:,maximum_grid_level) = dzu
[667]	353	!
[864]	354	!-- Next line to ensure an equally spaced grid.
	355	dzu_mg(1,maximum_grid_level) = dzu(2)
[709]	356
[1]	357	dzw_mg(:,maximum_grid_level) = dzw
	358	nzt_l = nzt
	359	DO l = maximum_grid_level-1, 1, -1
[1353]	360	dzu_mg(nzb+1,l) = 2.0_wp * dzu_mg(nzb+1,l+1)
	361	dzw_mg(nzb+1,l) = 2.0_wp * dzw_mg(nzb+1,l+1)
[1]	362	nzt_l = nzt_l / 2
	363	DO k = 2, nzt_l+1
	364	dzu_mg(k,l) = dzu_mg(2k-2,l+1) + dzu_mg(2k-1,l+1)
	365	dzw_mg(k,l) = dzw_mg(2k-2,l+1) + dzw_mg(2k-1,l+1)
	366	ENDDO
	367	ENDDO
	368
	369	nzt_l = nzt
	370	dx_l = dx
	371	dy_l = dy
	372	DO l = maximum_grid_level, 1, -1
[1353]	373	ddx2_mg(l) = 1.0_wp / dx_l**2
	374	ddy2_mg(l) = 1.0_wp / dy_l**2
[1]	375	DO k = nzb+1, nzt_l
[1353]	376	f2_mg(k,l) = 1.0_wp / ( dzu_mg(k+1,l) * dzw_mg(k,l) )
	377	f3_mg(k,l) = 1.0_wp / ( dzu_mg(k,l) * dzw_mg(k,l) )
	378	f1_mg(k,l) = 2.0_wp * ( ddx2_mg(l) + ddy2_mg(l) ) + &
[1]	379	f2_mg(k,l) + f3_mg(k,l)
	380	ENDDO
	381	nzt_l = nzt_l / 2
[1353]	382	dx_l = dx_l * 2.0_wp
	383	dy_l = dy_l * 2.0_wp
[1]	384	ENDDO
	385
	386	ENDIF
	387
	388	!
	389	!-- Compute the reciprocal values of the horizontal grid lengths.
[1353]	390	ddx = 1.0_wp / dx
	391	ddy = 1.0_wp / dy
[1]	392	dx2 = dx * dx
	393	dy2 = dy * dy
[1353]	394	ddx2 = 1.0_wp / dx2
	395	ddy2 = 1.0_wp / dy2
[1]	396
	397	!
	398	!-- Compute the grid-dependent mixing length.
	399	DO k = 1, nzt
[1322]	400	l_grid(k) = ( dx * dy * dzw(k) )**0.33333333333333_wp
[1]	401	ENDDO
	402
	403	!
	404	!-- Allocate outer and inner index arrays for topography and set
[114]	405	!-- defaults.
	406	!-- nzb_local has to contain additional layers of ghost points for calculating
	407	!-- the flag arrays needed for the multigrid method
	408	gls = 2**( maximum_grid_level )
[861]	409	IF ( gls < nbgp ) gls = nbgp
[667]	410
[114]	411	ALLOCATE( corner_nl(nys:nyn,nxl:nxr), corner_nr(nys:nyn,nxl:nxr), &
	412	corner_sl(nys:nyn,nxl:nxr), corner_sr(nys:nyn,nxl:nxr), &
[667]	413	nzb_local(-gls:ny+gls,-gls:nx+gls), &
	414	nzb_tmp(-nbgp:ny+nbgp,-nbgp:nx+nbgp), &
[114]	415	wall_l(nys:nyn,nxl:nxr), wall_n(nys:nyn,nxl:nxr), &
[1]	416	wall_r(nys:nyn,nxl:nxr), wall_s(nys:nyn,nxl:nxr) )
[667]	417	ALLOCATE( fwxm(nysg:nyng,nxlg:nxrg), fwxp(nysg:nyng,nxlg:nxrg), &
	418	fwym(nysg:nyng,nxlg:nxrg), fwyp(nysg:nyng,nxlg:nxrg), &
	419	fxm(nysg:nyng,nxlg:nxrg), fxp(nysg:nyng,nxlg:nxrg), &
	420	fym(nysg:nyng,nxlg:nxrg), fyp(nysg:nyng,nxlg:nxrg), &
	421	nzb_s_inner(nysg:nyng,nxlg:nxrg), &
	422	nzb_s_outer(nysg:nyng,nxlg:nxrg), &
	423	nzb_u_inner(nysg:nyng,nxlg:nxrg), &
	424	nzb_u_outer(nysg:nyng,nxlg:nxrg), &
	425	nzb_v_inner(nysg:nyng,nxlg:nxrg), &
	426	nzb_v_outer(nysg:nyng,nxlg:nxrg), &
	427	nzb_w_inner(nysg:nyng,nxlg:nxrg), &
	428	nzb_w_outer(nysg:nyng,nxlg:nxrg), &
	429	nzb_diff_s_inner(nysg:nyng,nxlg:nxrg), &
	430	nzb_diff_s_outer(nysg:nyng,nxlg:nxrg), &
	431	nzb_diff_u(nysg:nyng,nxlg:nxrg), &
	432	nzb_diff_v(nysg:nyng,nxlg:nxrg), &
	433	nzb_2d(nysg:nyng,nxlg:nxrg), &
[1221]	434	rflags_s_inner(nzb:nzt+2,nysg:nyng,nxlg:nxrg), &
	435	rflags_invers(nysg:nyng,nxlg:nxrg,nzb:nzt+2), &
[667]	436	wall_e_x(nysg:nyng,nxlg:nxrg), &
	437	wall_e_y(nysg:nyng,nxlg:nxrg), &
	438	wall_u(nysg:nyng,nxlg:nxrg), &
	439	wall_v(nysg:nyng,nxlg:nxrg), &
	440	wall_w_x(nysg:nyng,nxlg:nxrg), &
	441	wall_w_y(nysg:nyng,nxlg:nxrg) )
[1]	442
	443
[667]	444
	445	ALLOCATE( l_wall(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
	446
[818]	447
[1]	448	nzb_s_inner = nzb; nzb_s_outer = nzb
	449	nzb_u_inner = nzb; nzb_u_outer = nzb
	450	nzb_v_inner = nzb; nzb_v_outer = nzb
	451	nzb_w_inner = nzb; nzb_w_outer = nzb
	452
[1353]	453	rflags_s_inner = 1.0_wp
	454	rflags_invers = 1.0_wp
[1221]	455
[1]	456	!
[19]	457	!-- Define vertical gridpoint from (or to) which on the usual finite difference
[1]	458	!-- form (which does not use surface fluxes) is applied
	459	IF ( prandtl_layer .OR. use_surface_fluxes ) THEN
	460	nzb_diff = nzb + 2
	461	ELSE
	462	nzb_diff = nzb + 1
	463	ENDIF
[19]	464	IF ( use_top_fluxes ) THEN
	465	nzt_diff = nzt - 1
	466	ELSE
	467	nzt_diff = nzt
	468	ENDIF
[1]	469
	470	nzb_diff_s_inner = nzb_diff; nzb_diff_s_outer = nzb_diff
	471	nzb_diff_u = nzb_diff; nzb_diff_v = nzb_diff
	472
[1353]	473	wall_e_x = 0.0_wp; wall_e_y = 0.0_wp; wall_u = 0.0_wp; wall_v = 0.0_wp
	474	wall_w_x = 0.0_wp; wall_w_y = 0.0_wp
	475	fwxp = 1.0_wp; fwxm = 1.0_wp; fwyp = 1.0_wp; fwym = 1.0_wp
	476	fxp = 1.0_wp; fxm = 1.0_wp; fyp = 1.0_wp; fym = 1.0_wp
[1]	477
	478	!
	479	!-- Initialize near-wall mixing length l_wall only in the vertical direction
	480	!-- for the moment,
	481	!-- multiplication with wall_adjustment_factor near the end of this routine
	482	l_wall(nzb,:,:) = l_grid(1)
	483	DO k = nzb+1, nzt
	484	l_wall(k,:,:) = l_grid(k)
	485	ENDDO
	486	l_wall(nzt+1,:,:) = l_grid(nzt)
	487
	488	ALLOCATE ( vertical_influence(nzb:nzt) )
	489	DO k = 1, nzt
	490	vertical_influence(k) = MIN ( INT( l_grid(k) / &
[1353]	491	( wall_adjustment_factor * dzw(k) ) + 0.5_wp ), nzt - k )
[1]	492	ENDDO
	493
	494	DO k = 1, MAXVAL( nzb_s_inner )
[1353]	495	IF ( l_grid(k) > 1.5_wp * dx * wall_adjustment_factor .OR. &
	496	l_grid(k) > 1.5_wp * dy * wall_adjustment_factor ) THEN
[254]	497	WRITE( message_string, * ) 'grid anisotropy exceeds ', &
	498	'threshold given by only local', &
	499	' &horizontal reduction of near_wall ', &
	500	'mixing length l_wall', &
	501	' &starting from height level k = ', k, '.'
	502	CALL message( 'init_grid', 'PA0202', 0, 1, 0, 6, 0 )
[1]	503	EXIT
	504	ENDIF
	505	ENDDO
	506	vertical_influence(0) = vertical_influence(1)
	507
[667]	508	DO i = nxlg, nxrg
	509	DO j = nysg, nyng
[1]	510	DO k = nzb_s_inner(j,i) + 1, &
	511	nzb_s_inner(j,i) + vertical_influence(nzb_s_inner(j,i))
	512	l_wall(k,j,i) = zu(k) - zw(nzb_s_inner(j,i))
	513	ENDDO
	514	ENDDO
	515	ENDDO
	516
	517	!
	518	!-- Set outer and inner index arrays for non-flat topography.
	519	!-- Here consistency checks concerning domain size and periodicity are
	520	!-- necessary.
	521	!-- Within this SELECT CASE structure only nzb_local is initialized
	522	!-- individually depending on the chosen topography type, all other index
	523	!-- arrays are initialized further below.
	524	SELECT CASE ( TRIM( topography ) )
	525
	526	CASE ( 'flat' )
	527	!
[555]	528	!-- nzb_local is required for the multigrid solver
	529	nzb_local = 0
[1]	530
	531	CASE ( 'single_building' )
	532	!
	533	!-- Single rectangular building, by default centered in the middle of the
	534	!-- total domain
	535	blx = NINT( building_length_x / dx )
	536	bly = NINT( building_length_y / dy )
	537	bh = NINT( building_height / dz )
	538
[1322]	539	IF ( building_wall_left == 9999999.9_wp ) THEN
[1]	540	building_wall_left = ( nx + 1 - blx ) / 2 * dx
	541	ENDIF
	542	bxl = NINT( building_wall_left / dx )
	543	bxr = bxl + blx
	544
[1322]	545	IF ( building_wall_south == 9999999.9_wp ) THEN
[1]	546	building_wall_south = ( ny + 1 - bly ) / 2 * dy
	547	ENDIF
	548	bys = NINT( building_wall_south / dy )
	549	byn = bys + bly
	550
	551	!
	552	!-- Building size has to meet some requirements
	553	IF ( ( bxl < 1 ) .OR. ( bxr > nx-1 ) .OR. ( bxr < bxl+3 ) .OR. &
	554	( bys < 1 ) .OR. ( byn > ny-1 ) .OR. ( byn < bys+3 ) ) THEN
[274]	555	WRITE( message_string, * ) 'inconsistent building parameters:', &
	556	'& bxl=', bxl, 'bxr=', bxr, 'bys=', bys, &
	557	'byn=', byn, 'nx=', nx, 'ny=', ny
[254]	558	CALL message( 'init_grid', 'PA0203', 1, 2, 0, 6, 0 )
[1]	559	ENDIF
	560
	561	!
[217]	562	!-- Define the building.
[1]	563	nzb_local = 0
[134]	564	nzb_local(bys:byn,bxl:bxr) = bh
[1]	565
[240]	566	CASE ( 'single_street_canyon' )
	567	!
	568	!-- Single quasi-2D street canyon of infinite length in x or y direction.
	569	!-- The canyon is centered in the other direction by default.
[1322]	570	IF ( canyon_width_x /= 9999999.9_wp ) THEN
[240]	571	!
	572	!-- Street canyon in y direction
	573	cwx = NINT( canyon_width_x / dx )
[1322]	574	IF ( canyon_wall_left == 9999999.9_wp ) THEN
[240]	575	canyon_wall_left = ( nx + 1 - cwx ) / 2 * dx
	576	ENDIF
	577	cxl = NINT( canyon_wall_left / dx )
	578	cxr = cxl + cwx
	579
[1322]	580	ELSEIF ( canyon_width_y /= 9999999.9_wp ) THEN
[240]	581	!
	582	!-- Street canyon in x direction
	583	cwy = NINT( canyon_width_y / dy )
[1322]	584	IF ( canyon_wall_south == 9999999.9_wp ) THEN
[240]	585	canyon_wall_south = ( ny + 1 - cwy ) / 2 * dy
	586	ENDIF
	587	cys = NINT( canyon_wall_south / dy )
	588	cyn = cys + cwy
	589
	590	ELSE
[254]	591
	592	message_string = 'no street canyon width given'
	593	CALL message( 'init_grid', 'PA0204', 1, 2, 0, 6, 0 )
	594
[240]	595	ENDIF
	596
	597	ch = NINT( canyon_height / dz )
	598	dp_level_ind_b = ch
	599	!
	600	!-- Street canyon size has to meet some requirements
[1322]	601	IF ( canyon_width_x /= 9999999.9_wp ) THEN
[1353]	602	IF ( ( cxl < 1 ) .OR. ( cxr > nx-1 ) .OR. ( cwx < 3 ) .OR. &
[240]	603	( ch < 3 ) ) THEN
[1353]	604	WRITE( message_string, * ) 'inconsistent canyon parameters:', &
	605	'&cxl=', cxl, 'cxr=', cxr, &
	606	'cwx=', cwx, &
[254]	607	'ch=', ch, 'nx=', nx, 'ny=', ny
	608	CALL message( 'init_grid', 'PA0205', 1, 2, 0, 6, 0 )
[240]	609	ENDIF
[1322]	610	ELSEIF ( canyon_width_y /= 9999999.9_wp ) THEN
[1353]	611	IF ( ( cys < 1 ) .OR. ( cyn > ny-1 ) .OR. ( cwy < 3 ) .OR. &
[240]	612	( ch < 3 ) ) THEN
[1353]	613	WRITE( message_string, * ) 'inconsistent canyon parameters:', &
	614	'&cys=', cys, 'cyn=', cyn, &
	615	'cwy=', cwy, &
[254]	616	'ch=', ch, 'nx=', nx, 'ny=', ny
	617	CALL message( 'init_grid', 'PA0206', 1, 2, 0, 6, 0 )
[240]	618	ENDIF
	619	ENDIF
[1353]	620	IF ( canyon_width_x /= 9999999.9_wp .AND. &
	621	canyon_width_y /= 9999999.9_wp ) THEN
	622	message_string = 'inconsistent canyon parameters:' // &
	623	'&street canyon can only be oriented' // &
[254]	624	'&either in x- or in y-direction'
	625	CALL message( 'init_grid', 'PA0207', 1, 2, 0, 6, 0 )
[240]	626	ENDIF
	627
	628	nzb_local = ch
[1322]	629	IF ( canyon_width_x /= 9999999.9_wp ) THEN
[240]	630	nzb_local(:,cxl+1:cxr-1) = 0
[1322]	631	ELSEIF ( canyon_width_y /= 9999999.9_wp ) THEN
[240]	632	nzb_local(cys+1:cyn-1,:) = 0
	633	ENDIF
	634
[1]	635	CASE ( 'read_from_file' )
[759]	636
[818]	637	ALLOCATE ( topo_height(0:ny,0:nx) )
	638
[759]	639	DO ii = 0, io_blocks-1
	640	IF ( ii == io_group ) THEN
	641
[1]	642	!
[759]	643	!-- Arbitrary irregular topography data in PALM format (exactly
	644	!-- matching the grid size and total domain size)
[1069]	645	OPEN( 90, FILE='TOPOGRAPHY_DATA'//coupling_char, STATUS='OLD', &
[759]	646	FORM='FORMATTED', ERR=10 )
	647	DO j = ny, 0, -1
	648	READ( 90, *, ERR=11, END=11 ) ( topo_height(j,i), i = 0,nx )
	649	ENDDO
	650
	651	GOTO 12
	652
[1069]	653	10 message_string = 'file TOPOGRAPHY'//coupling_char//' does not exist'
[759]	654	CALL message( 'init_grid', 'PA0208', 1, 2, 0, 6, 0 )
	655
[1069]	656	11 message_string = 'errors in file TOPOGRAPHY_DATA'//coupling_char
[759]	657	CALL message( 'init_grid', 'PA0209', 1, 2, 0, 6, 0 )
	658
	659	12 CLOSE( 90 )
	660
	661	ENDIF
[809]	662	#if defined( __parallel ) && ! defined ( __check )
[759]	663	CALL MPI_BARRIER( comm2d, ierr )
	664	#endif
[559]	665	ENDDO
[759]	666
[1]	667	!
	668	!-- Calculate the index height of the topography
	669	DO i = 0, nx
	670	DO j = 0, ny
	671	nzb_local(j,i) = NINT( topo_height(j,i) / dz )
	672	ENDDO
	673	ENDDO
[818]	674
	675	DEALLOCATE ( topo_height )
[114]	676	!
[759]	677	!-- Add cyclic boundaries (additional layers are for calculating
	678	!-- flag arrays needed for the multigrid sover)
[114]	679	nzb_local(-gls:-1,0:nx) = nzb_local(ny-gls+1:ny,0:nx)
	680	nzb_local(ny+1:ny+gls,0:nx) = nzb_local(0:gls-1,0:nx)
	681	nzb_local(:,-gls:-1) = nzb_local(:,nx-gls+1:nx)
	682	nzb_local(:,nx+1:nx+gls) = nzb_local(:,0:gls-1)
[667]	683
[1]	684	CASE DEFAULT
	685	!
	686	!-- The DEFAULT case is reached either if the parameter topography
[217]	687	!-- contains a wrong character string or if the user has defined a special
[1]	688	!-- case in the user interface. There, the subroutine user_init_grid
	689	!-- checks which of these two conditions applies.
[114]	690	CALL user_init_grid( gls, nzb_local )
[1]	691
	692	END SELECT
	693	!
[861]	694	!-- Determine the maximum level of topography. Furthermore it is used for
	695	!-- steering the degradation of order of the applied advection scheme.
[978]	696	!-- In case of non-cyclic lateral boundaries, the order of the advection
[996]	697	!-- scheme have to be reduced up to nzt (required at the lateral boundaries).
[861]	698	nzb_max = MAXVAL( nzb_local )
[1353]	699	IF ( inflow_l .OR. outflow_l .OR. inflow_r .OR. outflow_r .OR. &
[978]	700	inflow_n .OR. outflow_n .OR. inflow_s .OR. outflow_s ) THEN
	701	nzb_max = nzt
	702	ENDIF
	703
[861]	704	!
[1]	705	!-- Consistency checks and index array initialization are only required for
[217]	706	!-- non-flat topography, also the initialization of topography height arrays
[49]	707	!-- zu_s_inner and zw_w_inner
[1]	708	IF ( TRIM( topography ) /= 'flat' ) THEN
	709
	710	!
	711	!-- Consistency checks
	712	IF ( MINVAL( nzb_local ) < 0 .OR. MAXVAL( nzb_local ) > nz + 1 ) THEN
[1353]	713	WRITE( message_string, * ) 'nzb_local values are outside the', &
	714	'model domain', &
	715	'&MINVAL( nzb_local ) = ', MINVAL(nzb_local), &
[274]	716	'&MAXVAL( nzb_local ) = ', MAXVAL(nzb_local)
[254]	717	CALL message( 'init_grid', 'PA0210', 1, 2, 0, 6, 0 )
[1]	718	ENDIF
	719
[722]	720	IF ( bc_lr == 'cyclic' ) THEN
[1353]	721	IF ( ANY( nzb_local(:,-1) /= nzb_local(:,nx) ) .OR. &
[1]	722	ANY( nzb_local(:,0) /= nzb_local(:,nx+1) ) ) THEN
[1353]	723	message_string = 'nzb_local does not fulfill cyclic' // &
[254]	724	' boundary condition in x-direction'
	725	CALL message( 'init_grid', 'PA0211', 1, 2, 0, 6, 0 )
[1]	726	ENDIF
	727	ENDIF
[722]	728	IF ( bc_ns == 'cyclic' ) THEN
[1353]	729	IF ( ANY( nzb_local(-1,:) /= nzb_local(ny,:) ) .OR. &
[1]	730	ANY( nzb_local(0,:) /= nzb_local(ny+1,:) ) ) THEN
[1353]	731	message_string = 'nzb_local does not fulfill cyclic' // &
[254]	732	' boundary condition in y-direction'
	733	CALL message( 'init_grid', 'PA0212', 1, 2, 0, 6, 0 )
[1]	734	ENDIF
	735	ENDIF
	736
[217]	737	IF ( topography_grid_convention == 'cell_edge' ) THEN
[134]	738	!
[217]	739	!-- The array nzb_local as defined using the 'cell_edge' convention
	740	!-- describes the actual total size of topography which is defined at the
	741	!-- cell edges where u=0 on the topography walls in x-direction and v=0
	742	!-- on the topography walls in y-direction. However, PALM uses individual
	743	!-- arrays nzb_u\|v\|w\|s_inner\|outer that are based on nzb_s_inner.
	744	!-- Therefore, the extent of topography in nzb_local is now reduced by
	745	!-- 1dx at the E topography walls and by 1dy at the N topography walls
	746	!-- to form the basis for nzb_s_inner.
	747	DO j = -gls, ny + gls
	748	DO i = -gls, nx
	749	nzb_local(j,i) = MIN( nzb_local(j,i), nzb_local(j,i+1) )
	750	ENDDO
[134]	751	ENDDO
[217]	752	!-- apply cyclic boundary conditions in x-direction
	753	!(ist das erforderlich? Ursache von Seung Bus Fehler?)
	754	nzb_local(:,nx+1:nx+gls) = nzb_local(:,0:gls-1)
	755	DO i = -gls, nx + gls
	756	DO j = -gls, ny
	757	nzb_local(j,i) = MIN( nzb_local(j,i), nzb_local(j+1,i) )
	758	ENDDO
[134]	759	ENDDO
[217]	760	!-- apply cyclic boundary conditions in y-direction
	761	!(ist das erforderlich? Ursache von Seung Bus Fehler?)
	762	nzb_local(ny+1:ny+gls,:) = nzb_local(0:gls-1,:)
	763	ENDIF
[134]	764
[1]	765	!
	766	!-- Initialize index arrays nzb_s_inner and nzb_w_inner
[861]	767	nzb_s_inner = nzb_local(nysg:nyng,nxlg:nxrg)
	768	nzb_w_inner = nzb_local(nysg:nyng,nxlg:nxrg)
[1]	769
	770	!
	771	!-- Initialize remaining index arrays:
	772	!-- first pre-initialize them with nzb_s_inner...
	773	nzb_u_inner = nzb_s_inner
	774	nzb_u_outer = nzb_s_inner
	775	nzb_v_inner = nzb_s_inner
	776	nzb_v_outer = nzb_s_inner
	777	nzb_w_outer = nzb_s_inner
	778	nzb_s_outer = nzb_s_inner
	779
	780	!
	781	!-- ...then extend pre-initialized arrays in their according directions
	782	!-- based on nzb_local using nzb_tmp as a temporary global index array
	783
	784	!
	785	!-- nzb_s_outer:
	786	!-- extend nzb_local east-/westwards first, then north-/southwards
[667]	787	nzb_tmp = nzb_local(-nbgp:ny+nbgp,-nbgp:nx+nbgp)
[1]	788	DO j = -1, ny + 1
	789	DO i = 0, nx
[1353]	790	nzb_tmp(j,i) = MAX( nzb_local(j,i-1), nzb_local(j,i), &
[1]	791	nzb_local(j,i+1) )
	792	ENDDO
	793	ENDDO
	794	DO i = nxl, nxr
	795	DO j = nys, nyn
[1353]	796	nzb_s_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i), &
[1]	797	nzb_tmp(j+1,i) )
	798	ENDDO
	799	!
	800	!-- non-cyclic boundary conditions (overwritten by call of
	801	!-- exchange_horiz_2d_int below in case of cyclic boundary conditions)
	802	IF ( nys == 0 ) THEN
	803	j = -1
	804	nzb_s_outer(j,i) = MAX( nzb_tmp(j+1,i), nzb_tmp(j,i) )
	805	ENDIF
	806	IF ( nys == ny ) THEN
	807	j = ny + 1
	808	nzb_s_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i) )
	809	ENDIF
	810	ENDDO
	811	!
	812	!-- nzb_w_outer:
	813	!-- identical to nzb_s_outer
	814	nzb_w_outer = nzb_s_outer
	815
	816	!
	817	!-- nzb_u_inner:
	818	!-- extend nzb_local rightwards only
[667]	819	nzb_tmp = nzb_local(-nbgp:ny+nbgp,-nbgp:nx+nbgp)
[1]	820	DO j = -1, ny + 1
	821	DO i = 0, nx + 1
	822	nzb_tmp(j,i) = MAX( nzb_local(j,i-1), nzb_local(j,i) )
	823	ENDDO
	824	ENDDO
[667]	825	nzb_u_inner = nzb_tmp(nysg:nyng,nxlg:nxrg)
[1]	826
	827	!
	828	!-- nzb_u_outer:
	829	!-- extend current nzb_tmp (nzb_u_inner) north-/southwards
	830	DO i = nxl, nxr
	831	DO j = nys, nyn
[1353]	832	nzb_u_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i), &
[1]	833	nzb_tmp(j+1,i) )
	834	ENDDO
	835	!
	836	!-- non-cyclic boundary conditions (overwritten by call of
	837	!-- exchange_horiz_2d_int below in case of cyclic boundary conditions)
	838	IF ( nys == 0 ) THEN
	839	j = -1
	840	nzb_u_outer(j,i) = MAX( nzb_tmp(j+1,i), nzb_tmp(j,i) )
	841	ENDIF
	842	IF ( nys == ny ) THEN
	843	j = ny + 1
	844	nzb_u_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i) )
	845	ENDIF
	846	ENDDO
	847
	848	!
	849	!-- nzb_v_inner:
	850	!-- extend nzb_local northwards only
[667]	851	nzb_tmp = nzb_local(-nbgp:ny+nbgp,-nbgp:nx+nbgp)
[1]	852	DO i = -1, nx + 1
	853	DO j = 0, ny + 1
	854	nzb_tmp(j,i) = MAX( nzb_local(j-1,i), nzb_local(j,i) )
	855	ENDDO
	856	ENDDO
[667]	857	nzb_v_inner = nzb_tmp(nys-nbgp:nyn+nbgp,nxl-nbgp:nxr+nbgp)
[1]	858
	859	!
	860	!-- nzb_v_outer:
	861	!-- extend current nzb_tmp (nzb_v_inner) right-/leftwards
	862	DO j = nys, nyn
	863	DO i = nxl, nxr
[1353]	864	nzb_v_outer(j,i) = MAX( nzb_tmp(j,i-1), nzb_tmp(j,i), &
[1]	865	nzb_tmp(j,i+1) )
	866	ENDDO
	867	!
	868	!-- non-cyclic boundary conditions (overwritten by call of
	869	!-- exchange_horiz_2d_int below in case of cyclic boundary conditions)
	870	IF ( nxl == 0 ) THEN
	871	i = -1
	872	nzb_v_outer(j,i) = MAX( nzb_tmp(j,i+1), nzb_tmp(j,i) )
	873	ENDIF
	874	IF ( nxr == nx ) THEN
	875	i = nx + 1
	876	nzb_v_outer(j,i) = MAX( nzb_tmp(j,i-1), nzb_tmp(j,i) )
	877	ENDIF
	878	ENDDO
[809]	879	#if ! defined ( __check )
[1]	880	!
	881	!-- Exchange of lateral boundary values (parallel computers) and cyclic
	882	!-- boundary conditions, if applicable.
	883	!-- Since nzb_s_inner and nzb_w_inner are derived directly from nzb_local
	884	!-- they do not require exchange and are not included here.
	885	CALL exchange_horiz_2d_int( nzb_u_inner )
	886	CALL exchange_horiz_2d_int( nzb_u_outer )
	887	CALL exchange_horiz_2d_int( nzb_v_inner )
	888	CALL exchange_horiz_2d_int( nzb_v_outer )
	889	CALL exchange_horiz_2d_int( nzb_w_outer )
	890	CALL exchange_horiz_2d_int( nzb_s_outer )
	891
[49]	892	!
	893	!-- Allocate and set the arrays containing the topography height
	894	IF ( myid == 0 ) THEN
	895
	896	ALLOCATE( zu_s_inner(0:nx+1,0:ny+1), zw_w_inner(0:nx+1,0:ny+1) )
	897
	898	DO i = 0, nx + 1
	899	DO j = 0, ny + 1
	900	zu_s_inner(i,j) = zu(nzb_local(j,i))
	901	zw_w_inner(i,j) = zw(nzb_local(j,i))
	902	ENDDO
	903	ENDDO
	904
	905	ENDIF
[1221]	906	!
	907	!-- Set flag arrays to be used for masking of grid points
	908	DO i = nxlg, nxrg
	909	DO j = nysg, nyng
	910	DO k = nzb, nzt+1
[1353]	911	IF ( k <= nzb_s_inner(j,i) ) rflags_s_inner(k,j,i) = 0.0_wp
	912	IF ( k <= nzb_s_inner(j,i) ) rflags_invers(j,i,k) = 0.0_wp
[1221]	913	ENDDO
	914	ENDDO
	915	ENDDO
[807]	916	#endif
[1]	917	ENDIF
	918
[809]	919	#if ! defined ( __check )
[1]	920	!
	921	!-- Preliminary: to be removed after completion of the topography code!
	922	!-- Set the former default k index arrays nzb_2d
	923	nzb_2d = nzb
	924
	925	!
	926	!-- Set the individual index arrays which define the k index from which on
	927	!-- the usual finite difference form (which does not use surface fluxes) is
	928	!-- applied
	929	IF ( prandtl_layer .OR. use_surface_fluxes ) THEN
	930	nzb_diff_u = nzb_u_inner + 2
	931	nzb_diff_v = nzb_v_inner + 2
	932	nzb_diff_s_inner = nzb_s_inner + 2
	933	nzb_diff_s_outer = nzb_s_outer + 2
	934	ELSE
	935	nzb_diff_u = nzb_u_inner + 1
	936	nzb_diff_v = nzb_v_inner + 1
	937	nzb_diff_s_inner = nzb_s_inner + 1
	938	nzb_diff_s_outer = nzb_s_outer + 1
	939	ENDIF
	940
	941	!
	942	!-- Calculation of wall switches and factors required by diffusion_u/v.f90 and
	943	!-- for limitation of near-wall mixing length l_wall further below
	944	corner_nl = 0
	945	corner_nr = 0
	946	corner_sl = 0
	947	corner_sr = 0
	948	wall_l = 0
	949	wall_n = 0
	950	wall_r = 0
	951	wall_s = 0
	952
	953	DO i = nxl, nxr
	954	DO j = nys, nyn
	955	!
	956	!-- u-component
	957	IF ( nzb_u_outer(j,i) > nzb_u_outer(j+1,i) ) THEN
[1353]	958	wall_u(j,i) = 1.0_wp ! north wall (location of adjacent fluid)
	959	fym(j,i) = 0.0_wp
	960	fyp(j,i) = 1.0_wp
[1]	961	ELSEIF ( nzb_u_outer(j,i) > nzb_u_outer(j-1,i) ) THEN
[1353]	962	wall_u(j,i) = 1.0_wp ! south wall (location of adjacent fluid)
	963	fym(j,i) = 1.0_wp
	964	fyp(j,i) = 0.0_wp
[1]	965	ENDIF
	966	!
	967	!-- v-component
	968	IF ( nzb_v_outer(j,i) > nzb_v_outer(j,i+1) ) THEN
[1353]	969	wall_v(j,i) = 1.0_wp ! rigth wall (location of adjacent fluid)
	970	fxm(j,i) = 0.0_wp
	971	fxp(j,i) = 1.0_wp
[1]	972	ELSEIF ( nzb_v_outer(j,i) > nzb_v_outer(j,i-1) ) THEN
[1353]	973	wall_v(j,i) = 1.0_wp ! left wall (location of adjacent fluid)
	974	fxm(j,i) = 1.0_wp
	975	fxp(j,i) = 0.0_wp
[1]	976	ENDIF
	977	!
	978	!-- w-component, also used for scalars, separate arrays for shear
	979	!-- production of tke
	980	IF ( nzb_w_outer(j,i) > nzb_w_outer(j+1,i) ) THEN
[1353]	981	wall_e_y(j,i) = 1.0_wp ! north wall (location of adjacent fluid)
	982	wall_w_y(j,i) = 1.0_wp
	983	fwym(j,i) = 0.0_wp
	984	fwyp(j,i) = 1.0_wp
[1]	985	ELSEIF ( nzb_w_outer(j,i) > nzb_w_outer(j-1,i) ) THEN
[1353]	986	wall_e_y(j,i) = -1.0_wp ! south wall (location of adjacent fluid)
	987	wall_w_y(j,i) = 1.0_wp
	988	fwym(j,i) = 1.0_wp
	989	fwyp(j,i) = 0.0_wp
[1]	990	ENDIF
	991	IF ( nzb_w_outer(j,i) > nzb_w_outer(j,i+1) ) THEN
[1353]	992	wall_e_x(j,i) = 1.0_wp ! right wall (location of adjacent fluid)
	993	wall_w_x(j,i) = 1.0_wp
	994	fwxm(j,i) = 0.0_wp
	995	fwxp(j,i) = 1.0_wp
[1]	996	ELSEIF ( nzb_w_outer(j,i) > nzb_w_outer(j,i-1) ) THEN
[1353]	997	wall_e_x(j,i) = -1.0_wp ! left wall (location of adjacent fluid)
	998	wall_w_x(j,i) = 1.0_wp
	999	fwxm(j,i) = 1.0_wp
	1000	fwxp(j,i) = 0.0_wp
[1]	1001	ENDIF
	1002	!
	1003	!-- Wall and corner locations inside buildings for limitation of
	1004	!-- near-wall mixing length l_wall
	1005	IF ( nzb_s_inner(j,i) > nzb_s_inner(j+1,i) ) THEN
	1006
	1007	wall_n(j,i) = nzb_s_inner(j+1,i) + 1 ! North wall
	1008
	1009	IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i-1) ) THEN
	1010	corner_nl(j,i) = MAX( nzb_s_inner(j+1,i), & ! Northleft corner
	1011	nzb_s_inner(j,i-1) ) + 1
	1012	ENDIF
	1013
	1014	IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i+1) ) THEN
	1015	corner_nr(j,i) = MAX( nzb_s_inner(j+1,i), & ! Northright corner
	1016	nzb_s_inner(j,i+1) ) + 1
	1017	ENDIF
	1018
	1019	ENDIF
	1020
	1021	IF ( nzb_s_inner(j,i) > nzb_s_inner(j-1,i) ) THEN
	1022
	1023	wall_s(j,i) = nzb_s_inner(j-1,i) + 1 ! South wall
	1024	IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i-1) ) THEN
	1025	corner_sl(j,i) = MAX( nzb_s_inner(j-1,i), & ! Southleft corner
	1026	nzb_s_inner(j,i-1) ) + 1
	1027	ENDIF
	1028
	1029	IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i+1) ) THEN
	1030	corner_sr(j,i) = MAX( nzb_s_inner(j-1,i), & ! Southright corner
	1031	nzb_s_inner(j,i+1) ) + 1
	1032	ENDIF
	1033
	1034	ENDIF
	1035
	1036	IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i-1) ) THEN
	1037	wall_l(j,i) = nzb_s_inner(j,i-1) + 1 ! Left wall
	1038	ENDIF
	1039
	1040	IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i+1) ) THEN
	1041	wall_r(j,i) = nzb_s_inner(j,i+1) + 1 ! Right wall
	1042	ENDIF
	1043
	1044	ENDDO
	1045	ENDDO
	1046
	1047	!
[114]	1048	!-- Calculate wall flag arrays for the multigrid method
	1049	IF ( psolver == 'multigrid' ) THEN
	1050	!
	1051	!-- Gridpoint increment of the current level
	1052	inc = 1
	1053
	1054	DO l = maximum_grid_level, 1 , -1
	1055
	1056	nxl_l = nxl_mg(l)
	1057	nxr_l = nxr_mg(l)
	1058	nys_l = nys_mg(l)
	1059	nyn_l = nyn_mg(l)
	1060	nzt_l = nzt_mg(l)
	1061
	1062	!
	1063	!-- Assign the flag level to be calculated
	1064	SELECT CASE ( l )
	1065	CASE ( 1 )
	1066	flags => wall_flags_1
	1067	CASE ( 2 )
	1068	flags => wall_flags_2
	1069	CASE ( 3 )
	1070	flags => wall_flags_3
	1071	CASE ( 4 )
	1072	flags => wall_flags_4
	1073	CASE ( 5 )
	1074	flags => wall_flags_5
	1075	CASE ( 6 )
	1076	flags => wall_flags_6
	1077	CASE ( 7 )
	1078	flags => wall_flags_7
	1079	CASE ( 8 )
	1080	flags => wall_flags_8
	1081	CASE ( 9 )
	1082	flags => wall_flags_9
	1083	CASE ( 10 )
	1084	flags => wall_flags_10
	1085	END SELECT
	1086
	1087	!
	1088	!-- Depending on the grid level, set the respective bits in case of
	1089	!-- neighbouring walls
	1090	!-- Bit 0: wall to the bottom
	1091	!-- Bit 1: wall to the top (not realized in remaining PALM code so far)
	1092	!-- Bit 2: wall to the south
	1093	!-- Bit 3: wall to the north
	1094	!-- Bit 4: wall to the left
	1095	!-- Bit 5: wall to the right
[116]	1096	!-- Bit 6: inside building
[114]	1097
	1098	flags = 0
	1099
[927]	1100	!
	1101	!-- In case of masking method, flags are not set and multigrid method
	1102	!-- works like FFT-solver
	1103	IF ( .NOT. masking_method ) THEN
	1104
	1105	DO i = nxl_l-1, nxr_l+1
	1106	DO j = nys_l-1, nyn_l+1
	1107	DO k = nzb, nzt_l+1
[114]	1108
	1109	!
[927]	1110	!-- Inside/outside building (inside building does not need
	1111	!-- further tests for walls)
	1112	IF ( kinc <= nzb_local(jinc,i*inc) ) THEN
[114]	1113
[927]	1114	flags(k,j,i) = IBSET( flags(k,j,i), 6 )
[114]	1115
[927]	1116	ELSE
[114]	1117	!
[927]	1118	!-- Bottom wall
	1119	IF ( (k-1)inc <= nzb_local(jinc,i*inc) ) THEN
	1120	flags(k,j,i) = IBSET( flags(k,j,i), 0 )
	1121	ENDIF
[114]	1122	!
[927]	1123	!-- South wall
	1124	IF ( kinc <= nzb_local((j-1)inc,i*inc) ) THEN
	1125	flags(k,j,i) = IBSET( flags(k,j,i), 2 )
	1126	ENDIF
[114]	1127	!
[927]	1128	!-- North wall
	1129	IF ( kinc <= nzb_local((j+1)inc,i*inc) ) THEN
	1130	flags(k,j,i) = IBSET( flags(k,j,i), 3 )
	1131	ENDIF
[114]	1132	!
[927]	1133	!-- Left wall
	1134	IF ( kinc <= nzb_local(jinc,(i-1)*inc) ) THEN
	1135	flags(k,j,i) = IBSET( flags(k,j,i), 4 )
	1136	ENDIF
[114]	1137	!
[927]	1138	!-- Right wall
	1139	IF ( kinc <= nzb_local(jinc,(i+1)*inc) ) THEN
	1140	flags(k,j,i) = IBSET( flags(k,j,i), 5 )
	1141	ENDIF
	1142
[114]	1143	ENDIF
	1144
[927]	1145	ENDDO
[114]	1146	ENDDO
	1147	ENDDO
	1148
[927]	1149	ENDIF
	1150
[114]	1151	!
	1152	!-- Test output of flag arrays
[145]	1153	! i = nxl_l
	1154	! WRITE (9,*) ' '
	1155	! WRITE (9,) ' mg level ', l, ' *', mg_switch_to_pe0_level
	1156	! WRITE (9,*) ' inc=', inc, ' i =', nxl_l
	1157	! WRITE (9,*) ' nxl_l',nxl_l,' nxr_l=',nxr_l,' nys_l=',nys_l,' nyn_l=',nyn_l
	1158	! DO k = nzt_l+1, nzb, -1
	1159	! WRITE (9,'(194(1X,I2))') ( flags(k,j,i), j = nys_l-1, nyn_l+1 )
	1160	! ENDDO
[114]	1161
	1162	inc = inc * 2
	1163
	1164	ENDDO
	1165
	1166	ENDIF
[861]	1167	!
	1168	!-- Allocate flags needed for masking walls.
[1221]	1169	ALLOCATE( wall_flags_0(nzb:nzt,nys:nyn,nxl:nxr), &
	1170	wall_flags_00(nzb:nzt,nys:nyn,nxl:nxr) )
	1171	wall_flags_0 = 0
	1172	wall_flags_00 = 0
[114]	1173
[1557]	1174	IF ( scalar_advec == 'ws-scheme' .OR. &
	1175	scalar_advec == 'ws-scheme-mono' ) THEN
[114]	1176	!
[861]	1177	!-- Set flags to steer the degradation of the advection scheme in advec_ws
	1178	!-- near topography, inflow- and outflow boundaries as well as bottom and
	1179	!-- top of model domain. wall_flags_0 remains zero for all non-prognostic
	1180	!-- grid points.
	1181	DO i = nxl, nxr
	1182	DO j = nys, nyn
	1183	DO k = nzb_s_inner(j,i)+1, nzt
	1184	!
	1185	!-- scalar - x-direction
	1186	!-- WS1 (0), WS3 (1), WS5 (2)
[978]	1187	IF ( k <= nzb_s_inner(j,i+1) .OR. ( ( inflow_l .OR. outflow_l )&
	1188	.AND. i == nxl ) .OR. ( ( inflow_r .OR. outflow_r ) &
	1189	.AND. i == nxr ) ) THEN
[861]	1190	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 0 )
	1191	ELSEIF ( k <= nzb_s_inner(j,i+2) .OR. k <= nzb_s_inner(j,i-1) &
[978]	1192	.OR. ( ( inflow_r .OR. outflow_r ) .AND. i == nxr-1 ) &
	1193	.OR. ( ( inflow_l .OR. outflow_l ) .AND. i == nxlu ) &
	1194	) THEN
[861]	1195	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 1 )
	1196	ELSE
	1197	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 2 )
	1198	ENDIF
	1199	!
	1200	!-- scalar - y-direction
	1201	!-- WS1 (3), WS3 (4), WS5 (5)
[978]	1202	IF ( k <= nzb_s_inner(j+1,i) .OR. ( ( inflow_s .OR. outflow_s )&
	1203	.AND. j == nys ) .OR. ( ( inflow_n .OR. outflow_n ) &
	1204	.AND. j == nyn ) ) THEN
[861]	1205	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 3 )
	1206	!-- WS3
	1207	ELSEIF ( k <= nzb_s_inner(j+2,i) .OR. k <= nzb_s_inner(j-1,i) &
[978]	1208	.OR. ( ( inflow_s .OR. outflow_s ) .AND. j == nysv ) &
	1209	.OR. ( ( inflow_n .OR. outflow_n ) .AND. j == nyn-1 ) &
	1210	) THEN
[861]	1211	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 4 )
	1212	!-- WS5
	1213	ELSE
	1214	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 5 )
	1215	ENDIF
	1216	!
	1217	!-- scalar - z-direction
	1218	!-- WS1 (6), WS3 (7), WS5 (8)
	1219	flag_set = .FALSE.
	1220	IF ( k == nzb_s_inner(j,i) + 1 .OR. k == nzt ) THEN
	1221	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 6 )
	1222	flag_set = .TRUE.
	1223	ELSEIF ( k == nzb_s_inner(j,i) + 2 .OR. k == nzt - 1 ) THEN
	1224	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 7 )
	1225	flag_set = .TRUE.
	1226	ELSEIF ( k > nzb_s_inner(j,i) .AND. .NOT. flag_set ) THEN
	1227	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 8 )
	1228	ENDIF
	1229	ENDDO
	1230	ENDDO
	1231	ENDDO
	1232	ENDIF
	1233
	1234	IF ( momentum_advec == 'ws-scheme' ) THEN
	1235	!
	1236	!-- Set wall_flags_0 to steer the degradation of the advection scheme in advec_ws
	1237	!-- near topography, inflow- and outflow boundaries as well as bottom and
	1238	!-- top of model domain. wall_flags_0 remains zero for all non-prognostic
	1239	!-- grid points.
	1240	DO i = nxl, nxr
	1241	DO j = nys, nyn
	1242	DO k = nzb_u_inner(j,i)+1, nzt
	1243	!
	1244	!-- u component - x-direction
	1245	!-- WS1 (9), WS3 (10), WS5 (11)
	1246	IF ( k <= nzb_u_inner(j,i+1) &
[1409]	1247	.OR. ( ( inflow_l .OR. outflow_l ) .AND. i <= nxlu ) &
[978]	1248	.OR. ( ( inflow_r .OR. outflow_r ) .AND. i == nxr ) &
	1249	) THEN
[861]	1250	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 9 )
	1251	ELSEIF ( k <= nzb_u_inner(j,i+2) .OR. k <= nzb_u_inner(j,i-1) &
[978]	1252	.OR. ( ( inflow_r .OR. outflow_r ) .AND. i == nxr-1 )&
	1253	.OR. ( ( inflow_l .OR. outflow_l ) .AND. i == nxlu+1)&
	1254	) THEN
[861]	1255	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 10 )
	1256	ELSE
	1257	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 11 )
	1258	ENDIF
[978]	1259
[861]	1260	!
	1261	!-- u component - y-direction
	1262	!-- WS1 (12), WS3 (13), WS5 (14)
[978]	1263	IF ( k <= nzb_u_inner(j+1,i) .OR. ( ( inflow_s .OR. outflow_s )&
	1264	.AND. j == nys ) .OR. ( ( inflow_n .OR. outflow_n ) &
	1265	.AND. j == nyn ) ) THEN
[861]	1266	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 12 )
	1267	ELSEIF ( k <= nzb_u_inner(j+2,i) .OR. k <= nzb_u_inner(j-1,i) &
[978]	1268	.OR. ( ( inflow_s .OR. outflow_s ) .AND. j == nysv ) &
	1269	.OR. ( ( inflow_n .OR. outflow_n ) .AND. j == nyn-1 ) &
	1270	) THEN
[861]	1271	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 13 )
	1272	ELSE
	1273	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 14 )
	1274	ENDIF
	1275	!
	1276	!-- u component - z-direction
	1277	!-- WS1 (15), WS3 (16), WS5 (17)
	1278	flag_set = .FALSE.
	1279	IF ( k == nzb_u_inner(j,i) + 1 .OR. k == nzt ) THEN
	1280	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 15 )
	1281	flag_set = .TRUE.
	1282	ELSEIF ( k == nzb_u_inner(j,i) + 2 .OR. k == nzt - 1 ) THEN
	1283	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 16 )
	1284	flag_set = .TRUE.
	1285	ELSEIF ( k > nzb_u_inner(j,i) .AND. .NOT. flag_set ) THEN
	1286	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 17 )
	1287	ENDIF
	1288
	1289	ENDDO
	1290	ENDDO
	1291	ENDDO
	1292
	1293	DO i = nxl, nxr
	1294	DO j = nys, nyn
	1295	DO k = nzb_v_inner(j,i)+1, nzt
	1296	!
	1297	!-- v component - x-direction
	1298	!-- WS1 (18), WS3 (19), WS5 (20)
[978]	1299	IF ( k <= nzb_v_inner(j,i+1) .OR. ( ( inflow_l .OR. outflow_l )&
	1300	.AND. i == nxl ) .OR. (( inflow_r .OR. outflow_r ) &
	1301	.AND. i == nxr ) ) THEN
[861]	1302	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 18 )
	1303	!-- WS3
	1304	ELSEIF ( k <= nzb_v_inner(j,i+2) .OR. k <= nzb_v_inner(j,i-1) &
[978]	1305	.OR. ( ( inflow_r .OR. outflow_r ) .AND. i == nxr-1 ) &
	1306	.OR. ( ( inflow_l .OR. outflow_l ) .AND. i == nxlu ) &
	1307	) THEN
[861]	1308	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 19 )
	1309	ELSE
	1310	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 20 )
	1311	ENDIF
	1312	!
	1313	!-- v component - y-direction
	1314	!-- WS1 (21), WS3 (22), WS5 (23)
	1315	IF ( k <= nzb_v_inner(j+1,i) &
[1409]	1316	.OR. ( ( inflow_s .OR. outflow_s ) .AND. j <= nysv ) &
[978]	1317	.OR. ( ( inflow_n .OR. outflow_n ) .AND. j == nyn ) &
	1318	) THEN
[861]	1319	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 21 )
	1320	ELSEIF ( k <= nzb_v_inner(j+2,i) .OR. k <= nzb_v_inner(j-1,i) &
[978]	1321	.OR. ( ( inflow_s .OR. outflow_s ) .AND. j == nysv+1 )&
	1322	.OR. ( ( inflow_n .OR. outflow_n ) .AND. j == nyn-1 )&
	1323	) THEN
[861]	1324	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 22 )
	1325	ELSE
	1326	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 23 )
	1327	ENDIF
	1328	!
	1329	!-- v component - z-direction
	1330	!-- WS1 (24), WS3 (25), WS5 (26)
	1331	flag_set = .FALSE.
	1332	IF ( k == nzb_v_inner(j,i) + 1 .OR. k == nzt ) THEN
	1333	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 24 )
	1334	flag_set = .TRUE.
	1335	ELSEIF ( k == nzb_v_inner(j,i) + 2 .OR. k == nzt - 1 ) THEN
	1336	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 25 )
	1337	flag_set = .TRUE.
	1338	ELSEIF ( k > nzb_v_inner(j,i) .AND. .NOT. flag_set ) THEN
	1339	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 26 )
	1340	ENDIF
	1341
	1342	ENDDO
	1343	ENDDO
	1344	ENDDO
	1345	DO i = nxl, nxr
	1346	DO j = nys, nyn
[1015]	1347	DO k = nzb_w_inner(j,i), nzt
[861]	1348	!
	1349	!-- w component - x-direction
	1350	!-- WS1 (27), WS3 (28), WS5 (29)
[978]	1351	IF ( k <= nzb_w_inner(j,i+1) .OR. ( ( inflow_l .OR. outflow_l )&
	1352	.AND. i == nxl ) .OR. ( ( inflow_r .OR. outflow_r ) &
	1353	.AND. i == nxr ) ) THEN
[861]	1354	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 27 )
	1355	ELSEIF ( k <= nzb_w_inner(j,i+2) .OR. k <= nzb_w_inner(j,i-1) &
[978]	1356	.OR. ( ( inflow_r .OR. outflow_r ) .AND. i == nxr-1 ) &
	1357	.OR. ( ( inflow_l .OR. outflow_l ) .AND. i == nxlu ) &
	1358	) THEN
[861]	1359	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 28 )
	1360	ELSE
	1361	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i),29 )
	1362	ENDIF
	1363	!
	1364	!-- w component - y-direction
	1365	!-- WS1 (30), WS3 (31), WS5 (32)
[978]	1366	IF ( k <= nzb_w_inner(j+1,i) .OR. ( ( inflow_s .OR. outflow_s )&
	1367	.AND. j == nys ) .OR. ( ( inflow_n .OR. outflow_n ) &
	1368	.AND. j == nyn ) ) THEN
[861]	1369	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 30 )
	1370	ELSEIF ( k <= nzb_w_inner(j+2,i) .OR. k <= nzb_w_inner(j-1,i) &
[978]	1371	.OR. ( ( inflow_s .OR. outflow_s ) .AND. j == nysv ) &
	1372	.OR. ( ( inflow_n .OR. outflow_n ) .AND. j == nyn-1 ) &
	1373	) THEN
[861]	1374	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 31 )
	1375	ELSE
[1221]	1376	wall_flags_00(k,j,i) = IBSET( wall_flags_00(k,j,i), 0 )
[861]	1377	ENDIF
	1378	!
	1379	!-- w component - z-direction
	1380	!-- WS1 (33), WS3 (34), WS5 (35)
	1381	flag_set = .FALSE.
	1382	IF ( k == nzb_w_inner(j,i) .OR. k == nzb_w_inner(j,i) + 1 &
	1383	.OR. k == nzt ) THEN
	1384	!
	1385	!-- Please note, at k == nzb_w_inner(j,i) a flag is explictely
	1386	!-- set, although this is not a prognostic level. However,
	1387	!-- contrary to the advection of u,v and s this is necessary
	1388	!-- because flux_t(nzb_w_inner(j,i)) is used for the tendency
	1389	!-- at k == nzb_w_inner(j,i)+1.
[1221]	1390	wall_flags_00(k,j,i) = IBSET( wall_flags_00(k,j,i), 1 )
[861]	1391	flag_set = .TRUE.
	1392	ELSEIF ( k == nzb_w_inner(j,i) + 2 .OR. k == nzt - 1 ) THEN
[1221]	1393	wall_flags_00(k,j,i) = IBSET( wall_flags_00(k,j,i), 2 )
[861]	1394	flag_set = .TRUE.
	1395	ELSEIF ( k > nzb_w_inner(j,i) .AND. .NOT. flag_set ) THEN
[1221]	1396	wall_flags_00(k,j,i) = IBSET( wall_flags_00(k,j,i), 3 )
[861]	1397	ENDIF
	1398
	1399	ENDDO
	1400	ENDDO
	1401	ENDDO
	1402
	1403	ENDIF
	1404
	1405	!
[1]	1406	!-- In case of topography: limit near-wall mixing length l_wall further:
	1407	!-- Go through all points of the subdomain one by one and look for the closest
	1408	!-- surface
	1409	IF ( TRIM(topography) /= 'flat' ) THEN
	1410	DO i = nxl, nxr
	1411	DO j = nys, nyn
	1412
	1413	nzb_si = nzb_s_inner(j,i)
	1414	vi = vertical_influence(nzb_si)
	1415
	1416	IF ( wall_n(j,i) > 0 ) THEN
	1417	!
	1418	!-- North wall (y distance)
	1419	DO k = wall_n(j,i), nzb_si
[1353]	1420	l_wall(k,j+1,i) = MIN( l_wall(k,j+1,i), 0.5_wp * dy )
[1]	1421	ENDDO
	1422	!
	1423	!-- Above North wall (yz distance)
	1424	DO k = nzb_si + 1, nzb_si + vi
[1353]	1425	l_wall(k,j+1,i) = MIN( l_wall(k,j+1,i), &
	1426	SQRT( 0.25_wp * dy**2 + &
[1]	1427	( zu(k) - zw(nzb_si) )**2 ) )
	1428	ENDDO
	1429	!
	1430	!-- Northleft corner (xy distance)
	1431	IF ( corner_nl(j,i) > 0 ) THEN
	1432	DO k = corner_nl(j,i), nzb_si
	1433	l_wall(k,j+1,i-1) = MIN( l_wall(k,j+1,i-1), &
[1353]	1434	0.5_wp * SQRT( dx2 + dy2 ) )
[1]	1435	ENDDO
	1436	!
	1437	!-- Above Northleft corner (xyz distance)
	1438	DO k = nzb_si + 1, nzb_si + vi
[1353]	1439	l_wall(k,j+1,i-1) = MIN( l_wall(k,j+1,i-1), &
	1440	SQRT( 0.25_wp * (dx2 + dy2) + &
	1441	( zu(k) - zw(nzb_si) )**2 ) )
[1]	1442	ENDDO
	1443	ENDIF
	1444	!
	1445	!-- Northright corner (xy distance)
	1446	IF ( corner_nr(j,i) > 0 ) THEN
	1447	DO k = corner_nr(j,i), nzb_si
[1353]	1448	l_wall(k,j+1,i+1) = MIN( l_wall(k,j+1,i+1), &
	1449	0.5_wp * SQRT( dx2 + dy2 ) )
[1]	1450	ENDDO
	1451	!
	1452	!-- Above northright corner (xyz distance)
	1453	DO k = nzb_si + 1, nzb_si + vi
[1353]	1454	l_wall(k,j+1,i+1) = MIN( l_wall(k,j+1,i+1), &
	1455	SQRT( 0.25_wp * (dx2 + dy2) + &
	1456	( zu(k) - zw(nzb_si) )**2 ) )
[1]	1457	ENDDO
	1458	ENDIF
	1459	ENDIF
	1460
	1461	IF ( wall_s(j,i) > 0 ) THEN
	1462	!
	1463	!-- South wall (y distance)
	1464	DO k = wall_s(j,i), nzb_si
[1353]	1465	l_wall(k,j-1,i) = MIN( l_wall(k,j-1,i), 0.5_wp * dy )
[1]	1466	ENDDO
	1467	!
	1468	!-- Above south wall (yz distance)
[1353]	1469	DO k = nzb_si + 1, nzb_si + vi
	1470	l_wall(k,j-1,i) = MIN( l_wall(k,j-1,i), &
	1471	SQRT( 0.25_wp * dy**2 + &
[1]	1472	( zu(k) - zw(nzb_si) )**2 ) )
	1473	ENDDO
	1474	!
	1475	!-- Southleft corner (xy distance)
	1476	IF ( corner_sl(j,i) > 0 ) THEN
	1477	DO k = corner_sl(j,i), nzb_si
[1353]	1478	l_wall(k,j-1,i-1) = MIN( l_wall(k,j-1,i-1), &
	1479	0.5_wp * SQRT( dx2 + dy2 ) )
[1]	1480	ENDDO
	1481	!
	1482	!-- Above southleft corner (xyz distance)
	1483	DO k = nzb_si + 1, nzb_si + vi
[1353]	1484	l_wall(k,j-1,i-1) = MIN( l_wall(k,j-1,i-1), &
	1485	SQRT( 0.25_wp * (dx2 + dy2) + &
	1486	( zu(k) - zw(nzb_si) )**2 ) )
[1]	1487	ENDDO
	1488	ENDIF
	1489	!
	1490	!-- Southright corner (xy distance)
	1491	IF ( corner_sr(j,i) > 0 ) THEN
	1492	DO k = corner_sr(j,i), nzb_si
[1353]	1493	l_wall(k,j-1,i+1) = MIN( l_wall(k,j-1,i+1), &
	1494	0.5_wp * SQRT( dx2 + dy2 ) )
[1]	1495	ENDDO
	1496	!
	1497	!-- Above southright corner (xyz distance)
	1498	DO k = nzb_si + 1, nzb_si + vi
[1353]	1499	l_wall(k,j-1,i+1) = MIN( l_wall(k,j-1,i+1), &
	1500	SQRT( 0.25_wp * (dx2 + dy2) + &
	1501	( zu(k) - zw(nzb_si) )**2 ) )
[1]	1502	ENDDO
	1503	ENDIF
	1504
	1505	ENDIF
	1506
	1507	IF ( wall_l(j,i) > 0 ) THEN
	1508	!
	1509	!-- Left wall (x distance)
	1510	DO k = wall_l(j,i), nzb_si
[1353]	1511	l_wall(k,j,i-1) = MIN( l_wall(k,j,i-1), 0.5_wp * dx )
[1]	1512	ENDDO
	1513	!
	1514	!-- Above left wall (xz distance)
	1515	DO k = nzb_si + 1, nzb_si + vi
[1353]	1516	l_wall(k,j,i-1) = MIN( l_wall(k,j,i-1), &
	1517	SQRT( 0.25_wp * dx**2 + &
	1518	( zu(k) - zw(nzb_si) )**2 ) )
[1]	1519	ENDDO
	1520	ENDIF
	1521
	1522	IF ( wall_r(j,i) > 0 ) THEN
	1523	!
	1524	!-- Right wall (x distance)
	1525	DO k = wall_r(j,i), nzb_si
[1353]	1526	l_wall(k,j,i+1) = MIN( l_wall(k,j,i+1), 0.5_wp * dx )
[1]	1527	ENDDO
	1528	!
	1529	!-- Above right wall (xz distance)
	1530	DO k = nzb_si + 1, nzb_si + vi
[1353]	1531	l_wall(k,j,i+1) = MIN( l_wall(k,j,i+1), &
	1532	SQRT( 0.25_wp * dx**2 + &
[1]	1533	( zu(k) - zw(nzb_si) )**2 ) )
	1534	ENDDO
	1535
	1536	ENDIF
	1537
	1538	ENDDO
	1539	ENDDO
	1540
	1541	ENDIF
	1542
	1543	!
	1544	!-- Multiplication with wall_adjustment_factor
	1545	l_wall = wall_adjustment_factor * l_wall
	1546
	1547	!
[709]	1548	!-- Set lateral boundary conditions for l_wall
[667]	1549	CALL exchange_horiz( l_wall, nbgp )
	1550
[1]	1551	DEALLOCATE( corner_nl, corner_nr, corner_sl, corner_sr, nzb_local, &
	1552	nzb_tmp, vertical_influence, wall_l, wall_n, wall_r, wall_s )
	1553
[807]	1554	#endif
[1]	1555
	1556	END SUBROUTINE init_grid

Note: See TracBrowser for help on using the repository browser.

Download in other formats:

| Impressum | ©Leibniz Universität Hannover |