Home

Context Navigation

source: palm/trunk/SOURCE/init_grid.f90 @ 1065

Last change on this file since 1065 was 1037, checked in by raasch, 12 years ago
last commit documented
Property svn:keywords set to `Id`
File size: 56.1 KB

Line
1	SUBROUTINE init_grid
2
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	!
20	! Current revisions:
21	! -----------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: init_grid.f90 1037 2012-10-22 14:10:22Z hoffmann $
27	!
28	! 1036 2012-10-22 13:43:42Z raasch
29	! code put under GPL (PALM 3.9)
30	!
31	! 1015 2012-09-27 09:23:24Z raasch
32	! lower index for calculating wall_flags_0 set to nzb_w_inner instead of
33	! nzb_w_inner+1
34	!
35	! 996 2012-09-07 10:41:47Z raasch
36	! little reformatting
37	!
38	! 978 2012-08-09 08:28:32Z fricke
39	! Bugfix: nzb_max is set to nzt at non-cyclic lateral boundaries
40	! Bugfix: Set wall_flags_0 for inflow boundary
41	!
42	! 927 2012-06-06 19:15:04Z raasch
43	! Wall flags are not set for multigrid method in case of masking method
44	!
45	! 864 2012-03-27 15:10:33Z gryschka
46	! In case of ocean and Dirichlet bottom bc for u and v dzu_mg and ddzu_pres
47	! were not correctly defined for k=1.
48	!
49	! 861 2012-03-26 14:18:34Z suehring
50	! Set wall_flags_0. The array is needed for degradation in ws-scheme near walls,
51	! inflow and outflow boundaries as well as near the bottom and the top of the
52	! model domain.!
53	! Initialization of nzb_s_inner and nzb_w_inner.
54	! gls has to be at least nbgp to do not exceed the array bounds of nzb_local
55	! while setting wall_flags_0
56	!
57	! 843 2012-02-29 15:16:21Z gryschka
58	! In case of ocean and dirichlet bc for u and v at the bottom
59	! the first u-level ist defined at same height as the first w-level
60	!
61	! 818 2012-02-08 16:11:23Z maronga
62	! Bugfix: topo_height is only required if topography is used. It is thus now
63	! allocated in the topography branch
64	!
65	! 809 2012-01-30 13:32:58Z maronga
66	! Bugfix: replaced .AND. and .NOT. with && and ! in the preprocessor directives
67	!
68	! 807 2012-01-25 11:53:51Z maronga
69	! New cpp directive "__check" implemented which is used by check_namelist_files
70	!
71	! 759 2011-09-15 13:58:31Z raasch
72	! Splitting of parallel I/O in blocks of PEs
73	!
74	! 722 2011-04-11 06:21:09Z raasch
75	! Bugfix: bc_lr/ns_cyc replaced by bc_lr/ns, because variables are not yet set
76	! here
77	!
78	! 709 2011-03-30 09:31:40Z raasch
79	! formatting adjustments
80	!
81	! 707 2011-03-29 11:39:40Z raasch
82	! bc_lr/ns replaced by bc_lr/ns_cyc
83	!
84	! 667 2010-12-23 12:06:00Z suehring/gryschka
85	! Definition of new array bounds nxlg, nxrg, nysg, nyng on each PE.
86	! Furthermore the allocation of arrays and steering of loops is done with these
87	! parameters. Call of exchange_horiz are modified.
88	! In case of dirichlet bounday condition at the bottom zu(0)=0.0
89	! dzu_mg has to be set explicitly for a equally spaced grid near bottom.
90	! ddzu_pres added to use a equally spaced grid near bottom.
91	!
92	! 555 2010-09-07 07:32:53Z raasch
93	! Bugfix: default setting of nzb_local for flat topography
94	!
95	! 274 2009-03-26 15:11:21Z heinze
96	! Output of messages replaced by message handling routine.
97	! new topography case 'single_street_canyon'
98	!
99	! 217 2008-12-09 18:00:48Z letzel
100	! +topography_grid_convention
101	!
102	! 134 2007-11-21 07:28:38Z letzel
103	! Redefine initial nzb_local as the actual total size of topography (later the
104	! extent of topography in nzb_local is reduced by 1dx at the E topography walls
105	! and by 1dy at the N topography walls to form the basis for nzb_s_inner);
106	! for consistency redefine 'single_building' case.
107	! Calculation of wall flag arrays
108	!
109	! 94 2007-06-01 15:25:22Z raasch
110	! Grid definition for ocean version
111	!
112	! 75 2007-03-22 09:54:05Z raasch
113	! storage of topography height arrays zu_s_inner and zw_s_inner,
114	! 2nd+3rd argument removed from exchange horiz
115	!
116	! 19 2007-02-23 04:53:48Z raasch
117	! Setting of nzt_diff
118	!
119	! RCS Log replace by Id keyword, revision history cleaned up
120	!
121	! Revision 1.17 2006/08/22 14:00:05 raasch
122	! +dz_max to limit vertical stretching,
123	! bugfix in index array initialization for line- or point-like topography
124	! structures
125	!
126	! Revision 1.1 1997/08/11 06:17:45 raasch
127	! Initial revision (Testversion)
128	!
129	!
130	! Description:
131	! ------------
132	! Creating grid depending constants
133	!------------------------------------------------------------------------------!
134
135	USE arrays_3d
136	USE control_parameters
137	USE grid_variables
138	USE indices
139	USE pegrid
140
141	IMPLICIT NONE
142
143	INTEGER :: bh, blx, bly, bxl, bxr, byn, bys, ch, cwx, cwy, cxl, cxr, cyn, &
144	cys, gls, i, ii, inc, i_center, j, j_center, k, l, nxl_l, &
145	nxr_l, nyn_l, nys_l, nzb_si, nzt_l, vi
146
147	INTEGER, DIMENSION(:), ALLOCATABLE :: vertical_influence
148
149	INTEGER, DIMENSION(:,:), ALLOCATABLE :: corner_nl, corner_nr, corner_sl, &
150	corner_sr, wall_l, wall_n, wall_r,&
151	wall_s, nzb_local, nzb_tmp
152
153	LOGICAL :: flag_set = .FALSE.
154
155	REAL :: dx_l, dy_l, dz_stretched
156
157	REAL, DIMENSION(:,:), ALLOCATABLE :: topo_height
158
159	REAL, DIMENSION(:,:,:), ALLOCATABLE :: distance
160
161	!
162	!-- Calculation of horizontal array bounds including ghost layers
163	nxlg = nxl - nbgp
164	nxrg = nxr + nbgp
165	nysg = nys - nbgp
166	nyng = nyn + nbgp
167
168	!
169	!-- Allocate grid arrays
170	ALLOCATE( ddzu(1:nzt+1), ddzw(1:nzt+1), dd2zu(1:nzt), dzu(1:nzt+1), &
171	dzw(1:nzt+1), l_grid(1:nzt), zu(nzb:nzt+1), zw(nzb:nzt+1) )
172
173	!
174	!-- Compute height of u-levels from constant grid length and dz stretch factors
175	IF ( dz == -1.0 ) THEN
176	message_string = 'missing dz'
177	CALL message( 'init_grid', 'PA0200', 1, 2, 0, 6, 0 )
178	ELSEIF ( dz <= 0.0 ) THEN
179	WRITE( message_string, * ) 'dz=',dz,' <= 0.0'
180	CALL message( 'init_grid', 'PA0201', 1, 2, 0, 6, 0 )
181	ENDIF
182
183	!
184	!-- Define the vertical grid levels
185	IF ( .NOT. ocean ) THEN
186	!
187	!-- Grid for atmosphere with surface at z=0 (k=0, w-grid).
188	!-- The second u-level (k=1) corresponds to the top of the
189	!-- Prandtl-layer.
190
191	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2 ) THEN
192	zu(0) = 0.0
193	! zu(0) = - dz * 0.5
194	ELSE
195	zu(0) = - dz * 0.5
196	ENDIF
197	zu(1) = dz * 0.5
198
199	dz_stretch_level_index = nzt+1
200	dz_stretched = dz
201	DO k = 2, nzt+1
202	IF ( dz_stretch_level <= zu(k-1) .AND. dz_stretched < dz_max ) THEN
203	dz_stretched = dz_stretched * dz_stretch_factor
204	dz_stretched = MIN( dz_stretched, dz_max )
205	IF ( dz_stretch_level_index == nzt+1 ) dz_stretch_level_index = k-1
206	ENDIF
207	zu(k) = zu(k-1) + dz_stretched
208	ENDDO
209
210	!
211	!-- Compute the w-levels. They are always staggered half-way between the
212	!-- corresponding u-levels. In case of dirichlet bc for u and v at the
213	!-- ground the first u- and w-level (k=0) are defined at same height (z=0).
214	!-- The top w-level is extrapolated linearly.
215	zw(0) = 0.0
216	DO k = 1, nzt
217	zw(k) = ( zu(k) + zu(k+1) ) * 0.5
218	ENDDO
219	zw(nzt+1) = zw(nzt) + 2.0 * ( zu(nzt+1) - zw(nzt) )
220
221	ELSE
222	!
223	!-- Grid for ocean with free water surface is at k=nzt (w-grid).
224	!-- In case of neumann bc at the ground the first first u-level (k=0) lies
225	!-- below the first w-level (k=0). In case of dirichlet bc the first u- and
226	!-- w-level are defined at same height, but staggered from the second level.
227	!-- The second u-level (k=1) corresponds to the top of the Prandtl-layer.
228	zu(nzt+1) = dz * 0.5
229	zu(nzt) = - dz * 0.5
230
231	dz_stretch_level_index = 0
232	dz_stretched = dz
233	DO k = nzt-1, 0, -1
234	IF ( dz_stretch_level <= ABS( zu(k+1) ) .AND. &
235	dz_stretched < dz_max ) THEN
236	dz_stretched = dz_stretched * dz_stretch_factor
237	dz_stretched = MIN( dz_stretched, dz_max )
238	IF ( dz_stretch_level_index == 0 ) dz_stretch_level_index = k+1
239	ENDIF
240	zu(k) = zu(k+1) - dz_stretched
241	ENDDO
242
243	!
244	!-- Compute the w-levels. They are always staggered half-way between the
245	!-- corresponding u-levels, except in case of dirichlet bc for u and v
246	!-- at the ground. In this case the first u- and w-level are defined at
247	!-- same height. The top w-level (nzt+1) is not used but set for
248	!-- consistency, since w and all scalar variables are defined up tp nzt+1.
249	zw(nzt+1) = dz
250	zw(nzt) = 0.0
251	DO k = 0, nzt
252	zw(k) = ( zu(k) + zu(k+1) ) * 0.5
253	ENDDO
254
255	!
256	!-- In case of dirichlet bc for u and v the first u- and w-level are defined
257	!-- at same height.
258	IF ( ibc_uv_b == 0 ) THEN
259	zu(0) = zw(0)
260	ENDIF
261
262	ENDIF
263
264	!
265	!-- Compute grid lengths.
266	DO k = 1, nzt+1
267	dzu(k) = zu(k) - zu(k-1)
268	ddzu(k) = 1.0 / dzu(k)
269	dzw(k) = zw(k) - zw(k-1)
270	ddzw(k) = 1.0 / dzw(k)
271	ENDDO
272
273	DO k = 1, nzt
274	dd2zu(k) = 1.0 / ( dzu(k) + dzu(k+1) )
275	ENDDO
276
277	!
278	!-- The FFT- SOR-pressure solvers assume grid spacings of a staggered grid
279	!-- everywhere. For the actual grid, the grid spacing at the lowest level
280	!-- is only dz/2, but should be dz. Therefore, an additional array
281	!-- containing with appropriate grid information is created for these
282	!-- solvers.
283	IF ( psolver /= 'multigrid' ) THEN
284	ALLOCATE( ddzu_pres(1:nzt+1) )
285	ddzu_pres = ddzu
286	ddzu_pres(1) = ddzu_pres(2) ! change for lowest level
287	ENDIF
288
289	!
290	!-- In case of multigrid method, compute grid lengths and grid factors for the
291	!-- grid levels
292	IF ( psolver == 'multigrid' ) THEN
293
294	ALLOCATE( ddx2_mg(maximum_grid_level), ddy2_mg(maximum_grid_level), &
295	dzu_mg(nzb+1:nzt+1,maximum_grid_level), &
296	dzw_mg(nzb+1:nzt+1,maximum_grid_level), &
297	f1_mg(nzb+1:nzt,maximum_grid_level), &
298	f2_mg(nzb+1:nzt,maximum_grid_level), &
299	f3_mg(nzb+1:nzt,maximum_grid_level) )
300
301	dzu_mg(:,maximum_grid_level) = dzu
302	!
303	!-- Next line to ensure an equally spaced grid.
304	dzu_mg(1,maximum_grid_level) = dzu(2)
305
306	dzw_mg(:,maximum_grid_level) = dzw
307	nzt_l = nzt
308	DO l = maximum_grid_level-1, 1, -1
309	dzu_mg(nzb+1,l) = 2.0 * dzu_mg(nzb+1,l+1)
310	dzw_mg(nzb+1,l) = 2.0 * dzw_mg(nzb+1,l+1)
311	nzt_l = nzt_l / 2
312	DO k = 2, nzt_l+1
313	dzu_mg(k,l) = dzu_mg(2k-2,l+1) + dzu_mg(2k-1,l+1)
314	dzw_mg(k,l) = dzw_mg(2k-2,l+1) + dzw_mg(2k-1,l+1)
315	ENDDO
316	ENDDO
317
318	nzt_l = nzt
319	dx_l = dx
320	dy_l = dy
321	DO l = maximum_grid_level, 1, -1
322	ddx2_mg(l) = 1.0 / dx_l**2
323	ddy2_mg(l) = 1.0 / dy_l**2
324	DO k = nzb+1, nzt_l
325	f2_mg(k,l) = 1.0 / ( dzu_mg(k+1,l) * dzw_mg(k,l) )
326	f3_mg(k,l) = 1.0 / ( dzu_mg(k,l) * dzw_mg(k,l) )
327	f1_mg(k,l) = 2.0 * ( ddx2_mg(l) + ddy2_mg(l) ) + &
328	f2_mg(k,l) + f3_mg(k,l)
329	ENDDO
330	nzt_l = nzt_l / 2
331	dx_l = dx_l * 2.0
332	dy_l = dy_l * 2.0
333	ENDDO
334
335	ENDIF
336
337	!
338	!-- Compute the reciprocal values of the horizontal grid lengths.
339	ddx = 1.0 / dx
340	ddy = 1.0 / dy
341	dx2 = dx * dx
342	dy2 = dy * dy
343	ddx2 = 1.0 / dx2
344	ddy2 = 1.0 / dy2
345
346	!
347	!-- Compute the grid-dependent mixing length.
348	DO k = 1, nzt
349	l_grid(k) = ( dx * dy * dzw(k) )**0.33333333333333
350	ENDDO
351
352	!
353	!-- Allocate outer and inner index arrays for topography and set
354	!-- defaults.
355	!-- nzb_local has to contain additional layers of ghost points for calculating
356	!-- the flag arrays needed for the multigrid method
357	gls = 2**( maximum_grid_level )
358	IF ( gls < nbgp ) gls = nbgp
359
360	ALLOCATE( corner_nl(nys:nyn,nxl:nxr), corner_nr(nys:nyn,nxl:nxr), &
361	corner_sl(nys:nyn,nxl:nxr), corner_sr(nys:nyn,nxl:nxr), &
362	nzb_local(-gls:ny+gls,-gls:nx+gls), &
363	nzb_tmp(-nbgp:ny+nbgp,-nbgp:nx+nbgp), &
364	wall_l(nys:nyn,nxl:nxr), wall_n(nys:nyn,nxl:nxr), &
365	wall_r(nys:nyn,nxl:nxr), wall_s(nys:nyn,nxl:nxr) )
366	ALLOCATE( fwxm(nysg:nyng,nxlg:nxrg), fwxp(nysg:nyng,nxlg:nxrg), &
367	fwym(nysg:nyng,nxlg:nxrg), fwyp(nysg:nyng,nxlg:nxrg), &
368	fxm(nysg:nyng,nxlg:nxrg), fxp(nysg:nyng,nxlg:nxrg), &
369	fym(nysg:nyng,nxlg:nxrg), fyp(nysg:nyng,nxlg:nxrg), &
370	nzb_s_inner(nysg:nyng,nxlg:nxrg), &
371	nzb_s_outer(nysg:nyng,nxlg:nxrg), &
372	nzb_u_inner(nysg:nyng,nxlg:nxrg), &
373	nzb_u_outer(nysg:nyng,nxlg:nxrg), &
374	nzb_v_inner(nysg:nyng,nxlg:nxrg), &
375	nzb_v_outer(nysg:nyng,nxlg:nxrg), &
376	nzb_w_inner(nysg:nyng,nxlg:nxrg), &
377	nzb_w_outer(nysg:nyng,nxlg:nxrg), &
378	nzb_diff_s_inner(nysg:nyng,nxlg:nxrg), &
379	nzb_diff_s_outer(nysg:nyng,nxlg:nxrg), &
380	nzb_diff_u(nysg:nyng,nxlg:nxrg), &
381	nzb_diff_v(nysg:nyng,nxlg:nxrg), &
382	nzb_2d(nysg:nyng,nxlg:nxrg), &
383	wall_e_x(nysg:nyng,nxlg:nxrg), &
384	wall_e_y(nysg:nyng,nxlg:nxrg), &
385	wall_u(nysg:nyng,nxlg:nxrg), &
386	wall_v(nysg:nyng,nxlg:nxrg), &
387	wall_w_x(nysg:nyng,nxlg:nxrg), &
388	wall_w_y(nysg:nyng,nxlg:nxrg) )
389
390
391
392	ALLOCATE( l_wall(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
393
394
395	nzb_s_inner = nzb; nzb_s_outer = nzb
396	nzb_u_inner = nzb; nzb_u_outer = nzb
397	nzb_v_inner = nzb; nzb_v_outer = nzb
398	nzb_w_inner = nzb; nzb_w_outer = nzb
399
400	!
401	!-- Define vertical gridpoint from (or to) which on the usual finite difference
402	!-- form (which does not use surface fluxes) is applied
403	IF ( prandtl_layer .OR. use_surface_fluxes ) THEN
404	nzb_diff = nzb + 2
405	ELSE
406	nzb_diff = nzb + 1
407	ENDIF
408	IF ( use_top_fluxes ) THEN
409	nzt_diff = nzt - 1
410	ELSE
411	nzt_diff = nzt
412	ENDIF
413
414	nzb_diff_s_inner = nzb_diff; nzb_diff_s_outer = nzb_diff
415	nzb_diff_u = nzb_diff; nzb_diff_v = nzb_diff
416
417	wall_e_x = 0.0; wall_e_y = 0.0; wall_u = 0.0; wall_v = 0.0
418	wall_w_x = 0.0; wall_w_y = 0.0
419	fwxp = 1.0; fwxm = 1.0; fwyp = 1.0; fwym = 1.0
420	fxp = 1.0; fxm = 1.0; fyp = 1.0; fym = 1.0
421
422	!
423	!-- Initialize near-wall mixing length l_wall only in the vertical direction
424	!-- for the moment,
425	!-- multiplication with wall_adjustment_factor near the end of this routine
426	l_wall(nzb,:,:) = l_grid(1)
427	DO k = nzb+1, nzt
428	l_wall(k,:,:) = l_grid(k)
429	ENDDO
430	l_wall(nzt+1,:,:) = l_grid(nzt)
431
432	ALLOCATE ( vertical_influence(nzb:nzt) )
433	DO k = 1, nzt
434	vertical_influence(k) = MIN ( INT( l_grid(k) / &
435	( wall_adjustment_factor * dzw(k) ) + 0.5 ), nzt - k )
436	ENDDO
437
438	DO k = 1, MAXVAL( nzb_s_inner )
439	IF ( l_grid(k) > 1.5 * dx * wall_adjustment_factor .OR. &
440	l_grid(k) > 1.5 * dy * wall_adjustment_factor ) THEN
441	WRITE( message_string, * ) 'grid anisotropy exceeds ', &
442	'threshold given by only local', &
443	' &horizontal reduction of near_wall ', &
444	'mixing length l_wall', &
445	' &starting from height level k = ', k, '.'
446	CALL message( 'init_grid', 'PA0202', 0, 1, 0, 6, 0 )
447	EXIT
448	ENDIF
449	ENDDO
450	vertical_influence(0) = vertical_influence(1)
451
452	DO i = nxlg, nxrg
453	DO j = nysg, nyng
454	DO k = nzb_s_inner(j,i) + 1, &
455	nzb_s_inner(j,i) + vertical_influence(nzb_s_inner(j,i))
456	l_wall(k,j,i) = zu(k) - zw(nzb_s_inner(j,i))
457	ENDDO
458	ENDDO
459	ENDDO
460
461	!
462	!-- Set outer and inner index arrays for non-flat topography.
463	!-- Here consistency checks concerning domain size and periodicity are
464	!-- necessary.
465	!-- Within this SELECT CASE structure only nzb_local is initialized
466	!-- individually depending on the chosen topography type, all other index
467	!-- arrays are initialized further below.
468	SELECT CASE ( TRIM( topography ) )
469
470	CASE ( 'flat' )
471	!
472	!-- nzb_local is required for the multigrid solver
473	nzb_local = 0
474
475	CASE ( 'single_building' )
476	!
477	!-- Single rectangular building, by default centered in the middle of the
478	!-- total domain
479	blx = NINT( building_length_x / dx )
480	bly = NINT( building_length_y / dy )
481	bh = NINT( building_height / dz )
482
483	IF ( building_wall_left == 9999999.9 ) THEN
484	building_wall_left = ( nx + 1 - blx ) / 2 * dx
485	ENDIF
486	bxl = NINT( building_wall_left / dx )
487	bxr = bxl + blx
488
489	IF ( building_wall_south == 9999999.9 ) THEN
490	building_wall_south = ( ny + 1 - bly ) / 2 * dy
491	ENDIF
492	bys = NINT( building_wall_south / dy )
493	byn = bys + bly
494
495	!
496	!-- Building size has to meet some requirements
497	IF ( ( bxl < 1 ) .OR. ( bxr > nx-1 ) .OR. ( bxr < bxl+3 ) .OR. &
498	( bys < 1 ) .OR. ( byn > ny-1 ) .OR. ( byn < bys+3 ) ) THEN
499	WRITE( message_string, * ) 'inconsistent building parameters:', &
500	'& bxl=', bxl, 'bxr=', bxr, 'bys=', bys, &
501	'byn=', byn, 'nx=', nx, 'ny=', ny
502	CALL message( 'init_grid', 'PA0203', 1, 2, 0, 6, 0 )
503	ENDIF
504
505	!
506	!-- Define the building.
507	nzb_local = 0
508	nzb_local(bys:byn,bxl:bxr) = bh
509
510	CASE ( 'single_street_canyon' )
511	!
512	!-- Single quasi-2D street canyon of infinite length in x or y direction.
513	!-- The canyon is centered in the other direction by default.
514	IF ( canyon_width_x /= 9999999.9 ) THEN
515	!
516	!-- Street canyon in y direction
517	cwx = NINT( canyon_width_x / dx )
518	IF ( canyon_wall_left == 9999999.9 ) THEN
519	canyon_wall_left = ( nx + 1 - cwx ) / 2 * dx
520	ENDIF
521	cxl = NINT( canyon_wall_left / dx )
522	cxr = cxl + cwx
523
524	ELSEIF ( canyon_width_y /= 9999999.9 ) THEN
525	!
526	!-- Street canyon in x direction
527	cwy = NINT( canyon_width_y / dy )
528	IF ( canyon_wall_south == 9999999.9 ) THEN
529	canyon_wall_south = ( ny + 1 - cwy ) / 2 * dy
530	ENDIF
531	cys = NINT( canyon_wall_south / dy )
532	cyn = cys + cwy
533
534	ELSE
535
536	message_string = 'no street canyon width given'
537	CALL message( 'init_grid', 'PA0204', 1, 2, 0, 6, 0 )
538
539	ENDIF
540
541	ch = NINT( canyon_height / dz )
542	dp_level_ind_b = ch
543	!
544	!-- Street canyon size has to meet some requirements
545	IF ( canyon_width_x /= 9999999.9 ) THEN
546	IF ( ( cxl < 1 ) .OR. ( cxr > nx-1 ) .OR. ( cwx < 3 ) .OR. &
547	( ch < 3 ) ) THEN
548	WRITE( message_string, * ) 'inconsistent canyon parameters:', &
549	'&cxl=', cxl, 'cxr=', cxr, &
550	'cwx=', cwx, &
551	'ch=', ch, 'nx=', nx, 'ny=', ny
552	CALL message( 'init_grid', 'PA0205', 1, 2, 0, 6, 0 )
553	ENDIF
554	ELSEIF ( canyon_width_y /= 9999999.9 ) THEN
555	IF ( ( cys < 1 ) .OR. ( cyn > ny-1 ) .OR. ( cwy < 3 ) .OR. &
556	( ch < 3 ) ) THEN
557	WRITE( message_string, * ) 'inconsistent canyon parameters:', &
558	'&cys=', cys, 'cyn=', cyn, &
559	'cwy=', cwy, &
560	'ch=', ch, 'nx=', nx, 'ny=', ny
561	CALL message( 'init_grid', 'PA0206', 1, 2, 0, 6, 0 )
562	ENDIF
563	ENDIF
564	IF ( canyon_width_x /= 9999999.9 .AND. canyon_width_y /= 9999999.9 ) &
565	THEN
566	message_string = 'inconsistent canyon parameters:' // &
567	'&street canyon can only be oriented' // &
568	'&either in x- or in y-direction'
569	CALL message( 'init_grid', 'PA0207', 1, 2, 0, 6, 0 )
570	ENDIF
571
572	nzb_local = ch
573	IF ( canyon_width_x /= 9999999.9 ) THEN
574	nzb_local(:,cxl+1:cxr-1) = 0
575	ELSEIF ( canyon_width_y /= 9999999.9 ) THEN
576	nzb_local(cys+1:cyn-1,:) = 0
577	ENDIF
578
579	CASE ( 'read_from_file' )
580
581	ALLOCATE ( topo_height(0:ny,0:nx) )
582
583	DO ii = 0, io_blocks-1
584	IF ( ii == io_group ) THEN
585
586	!
587	!-- Arbitrary irregular topography data in PALM format (exactly
588	!-- matching the grid size and total domain size)
589	OPEN( 90, FILE='TOPOGRAPHY_DATA', STATUS='OLD', &
590	FORM='FORMATTED', ERR=10 )
591	DO j = ny, 0, -1
592	READ( 90, *, ERR=11, END=11 ) ( topo_height(j,i), i = 0,nx )
593	ENDDO
594
595	GOTO 12
596
597	10 message_string = 'file TOPOGRAPHY_DATA does not exist'
598	CALL message( 'init_grid', 'PA0208', 1, 2, 0, 6, 0 )
599
600	11 message_string = 'errors in file TOPOGRAPHY_DATA'
601	CALL message( 'init_grid', 'PA0209', 1, 2, 0, 6, 0 )
602
603	12 CLOSE( 90 )
604
605	ENDIF
606	#if defined( __parallel ) && ! defined ( __check )
607	CALL MPI_BARRIER( comm2d, ierr )
608	#endif
609	ENDDO
610
611	!
612	!-- Calculate the index height of the topography
613	DO i = 0, nx
614	DO j = 0, ny
615	nzb_local(j,i) = NINT( topo_height(j,i) / dz )
616	ENDDO
617	ENDDO
618
619	DEALLOCATE ( topo_height )
620	!
621	!-- Add cyclic boundaries (additional layers are for calculating
622	!-- flag arrays needed for the multigrid sover)
623	nzb_local(-gls:-1,0:nx) = nzb_local(ny-gls+1:ny,0:nx)
624	nzb_local(ny+1:ny+gls,0:nx) = nzb_local(0:gls-1,0:nx)
625	nzb_local(:,-gls:-1) = nzb_local(:,nx-gls+1:nx)
626	nzb_local(:,nx+1:nx+gls) = nzb_local(:,0:gls-1)
627
628	CASE DEFAULT
629	!
630	!-- The DEFAULT case is reached either if the parameter topography
631	!-- contains a wrong character string or if the user has defined a special
632	!-- case in the user interface. There, the subroutine user_init_grid
633	!-- checks which of these two conditions applies.
634	CALL user_init_grid( gls, nzb_local )
635
636	END SELECT
637	!
638	!-- Determine the maximum level of topography. Furthermore it is used for
639	!-- steering the degradation of order of the applied advection scheme.
640	!-- In case of non-cyclic lateral boundaries, the order of the advection
641	!-- scheme have to be reduced up to nzt (required at the lateral boundaries).
642	nzb_max = MAXVAL( nzb_local )
643	IF ( inflow_l .OR. outflow_l .OR. inflow_r .OR. outflow_r .OR. &
644	inflow_n .OR. outflow_n .OR. inflow_s .OR. outflow_s ) THEN
645	nzb_max = nzt
646	ENDIF
647
648	!
649	!-- Consistency checks and index array initialization are only required for
650	!-- non-flat topography, also the initialization of topography height arrays
651	!-- zu_s_inner and zw_w_inner
652	IF ( TRIM( topography ) /= 'flat' ) THEN
653
654	!
655	!-- Consistency checks
656	IF ( MINVAL( nzb_local ) < 0 .OR. MAXVAL( nzb_local ) > nz + 1 ) THEN
657	WRITE( message_string, * ) 'nzb_local values are outside the', &
658	'model domain', &
659	'&MINVAL( nzb_local ) = ', MINVAL(nzb_local), &
660	'&MAXVAL( nzb_local ) = ', MAXVAL(nzb_local)
661	CALL message( 'init_grid', 'PA0210', 1, 2, 0, 6, 0 )
662	ENDIF
663
664	IF ( bc_lr == 'cyclic' ) THEN
665	IF ( ANY( nzb_local(:,-1) /= nzb_local(:,nx) ) .OR. &
666	ANY( nzb_local(:,0) /= nzb_local(:,nx+1) ) ) THEN
667	message_string = 'nzb_local does not fulfill cyclic' // &
668	' boundary condition in x-direction'
669	CALL message( 'init_grid', 'PA0211', 1, 2, 0, 6, 0 )
670	ENDIF
671	ENDIF
672	IF ( bc_ns == 'cyclic' ) THEN
673	IF ( ANY( nzb_local(-1,:) /= nzb_local(ny,:) ) .OR. &
674	ANY( nzb_local(0,:) /= nzb_local(ny+1,:) ) ) THEN
675	message_string = 'nzb_local does not fulfill cyclic' // &
676	' boundary condition in y-direction'
677	CALL message( 'init_grid', 'PA0212', 1, 2, 0, 6, 0 )
678	ENDIF
679	ENDIF
680
681	IF ( topography_grid_convention == 'cell_edge' ) THEN
682	!
683	!-- The array nzb_local as defined using the 'cell_edge' convention
684	!-- describes the actual total size of topography which is defined at the
685	!-- cell edges where u=0 on the topography walls in x-direction and v=0
686	!-- on the topography walls in y-direction. However, PALM uses individual
687	!-- arrays nzb_u\|v\|w\|s_inner\|outer that are based on nzb_s_inner.
688	!-- Therefore, the extent of topography in nzb_local is now reduced by
689	!-- 1dx at the E topography walls and by 1dy at the N topography walls
690	!-- to form the basis for nzb_s_inner.
691	DO j = -gls, ny + gls
692	DO i = -gls, nx
693	nzb_local(j,i) = MIN( nzb_local(j,i), nzb_local(j,i+1) )
694	ENDDO
695	ENDDO
696	!-- apply cyclic boundary conditions in x-direction
697	!(ist das erforderlich? Ursache von Seung Bus Fehler?)
698	nzb_local(:,nx+1:nx+gls) = nzb_local(:,0:gls-1)
699	DO i = -gls, nx + gls
700	DO j = -gls, ny
701	nzb_local(j,i) = MIN( nzb_local(j,i), nzb_local(j+1,i) )
702	ENDDO
703	ENDDO
704	!-- apply cyclic boundary conditions in y-direction
705	!(ist das erforderlich? Ursache von Seung Bus Fehler?)
706	nzb_local(ny+1:ny+gls,:) = nzb_local(0:gls-1,:)
707	ENDIF
708
709	!
710	!-- Initialize index arrays nzb_s_inner and nzb_w_inner
711	nzb_s_inner = nzb_local(nysg:nyng,nxlg:nxrg)
712	nzb_w_inner = nzb_local(nysg:nyng,nxlg:nxrg)
713
714	!
715	!-- Initialize remaining index arrays:
716	!-- first pre-initialize them with nzb_s_inner...
717	nzb_u_inner = nzb_s_inner
718	nzb_u_outer = nzb_s_inner
719	nzb_v_inner = nzb_s_inner
720	nzb_v_outer = nzb_s_inner
721	nzb_w_outer = nzb_s_inner
722	nzb_s_outer = nzb_s_inner
723
724	!
725	!-- ...then extend pre-initialized arrays in their according directions
726	!-- based on nzb_local using nzb_tmp as a temporary global index array
727
728	!
729	!-- nzb_s_outer:
730	!-- extend nzb_local east-/westwards first, then north-/southwards
731	nzb_tmp = nzb_local(-nbgp:ny+nbgp,-nbgp:nx+nbgp)
732	DO j = -1, ny + 1
733	DO i = 0, nx
734	nzb_tmp(j,i) = MAX( nzb_local(j,i-1), nzb_local(j,i), &
735	nzb_local(j,i+1) )
736	ENDDO
737	ENDDO
738	DO i = nxl, nxr
739	DO j = nys, nyn
740	nzb_s_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i), &
741	nzb_tmp(j+1,i) )
742	ENDDO
743	!
744	!-- non-cyclic boundary conditions (overwritten by call of
745	!-- exchange_horiz_2d_int below in case of cyclic boundary conditions)
746	IF ( nys == 0 ) THEN
747	j = -1
748	nzb_s_outer(j,i) = MAX( nzb_tmp(j+1,i), nzb_tmp(j,i) )
749	ENDIF
750	IF ( nys == ny ) THEN
751	j = ny + 1
752	nzb_s_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i) )
753	ENDIF
754	ENDDO
755	!
756	!-- nzb_w_outer:
757	!-- identical to nzb_s_outer
758	nzb_w_outer = nzb_s_outer
759
760	!
761	!-- nzb_u_inner:
762	!-- extend nzb_local rightwards only
763	nzb_tmp = nzb_local(-nbgp:ny+nbgp,-nbgp:nx+nbgp)
764	DO j = -1, ny + 1
765	DO i = 0, nx + 1
766	nzb_tmp(j,i) = MAX( nzb_local(j,i-1), nzb_local(j,i) )
767	ENDDO
768	ENDDO
769	nzb_u_inner = nzb_tmp(nysg:nyng,nxlg:nxrg)
770
771	!
772	!-- nzb_u_outer:
773	!-- extend current nzb_tmp (nzb_u_inner) north-/southwards
774	DO i = nxl, nxr
775	DO j = nys, nyn
776	nzb_u_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i), &
777	nzb_tmp(j+1,i) )
778	ENDDO
779	!
780	!-- non-cyclic boundary conditions (overwritten by call of
781	!-- exchange_horiz_2d_int below in case of cyclic boundary conditions)
782	IF ( nys == 0 ) THEN
783	j = -1
784	nzb_u_outer(j,i) = MAX( nzb_tmp(j+1,i), nzb_tmp(j,i) )
785	ENDIF
786	IF ( nys == ny ) THEN
787	j = ny + 1
788	nzb_u_outer(j,i) = MAX( nzb_tmp(j-1,i), nzb_tmp(j,i) )
789	ENDIF
790	ENDDO
791
792	!
793	!-- nzb_v_inner:
794	!-- extend nzb_local northwards only
795	nzb_tmp = nzb_local(-nbgp:ny+nbgp,-nbgp:nx+nbgp)
796	DO i = -1, nx + 1
797	DO j = 0, ny + 1
798	nzb_tmp(j,i) = MAX( nzb_local(j-1,i), nzb_local(j,i) )
799	ENDDO
800	ENDDO
801	nzb_v_inner = nzb_tmp(nys-nbgp:nyn+nbgp,nxl-nbgp:nxr+nbgp)
802
803	!
804	!-- nzb_v_outer:
805	!-- extend current nzb_tmp (nzb_v_inner) right-/leftwards
806	DO j = nys, nyn
807	DO i = nxl, nxr
808	nzb_v_outer(j,i) = MAX( nzb_tmp(j,i-1), nzb_tmp(j,i), &
809	nzb_tmp(j,i+1) )
810	ENDDO
811	!
812	!-- non-cyclic boundary conditions (overwritten by call of
813	!-- exchange_horiz_2d_int below in case of cyclic boundary conditions)
814	IF ( nxl == 0 ) THEN
815	i = -1
816	nzb_v_outer(j,i) = MAX( nzb_tmp(j,i+1), nzb_tmp(j,i) )
817	ENDIF
818	IF ( nxr == nx ) THEN
819	i = nx + 1
820	nzb_v_outer(j,i) = MAX( nzb_tmp(j,i-1), nzb_tmp(j,i) )
821	ENDIF
822	ENDDO
823	#if ! defined ( __check )
824	!
825	!-- Exchange of lateral boundary values (parallel computers) and cyclic
826	!-- boundary conditions, if applicable.
827	!-- Since nzb_s_inner and nzb_w_inner are derived directly from nzb_local
828	!-- they do not require exchange and are not included here.
829	CALL exchange_horiz_2d_int( nzb_u_inner )
830	CALL exchange_horiz_2d_int( nzb_u_outer )
831	CALL exchange_horiz_2d_int( nzb_v_inner )
832	CALL exchange_horiz_2d_int( nzb_v_outer )
833	CALL exchange_horiz_2d_int( nzb_w_outer )
834	CALL exchange_horiz_2d_int( nzb_s_outer )
835
836	!
837	!-- Allocate and set the arrays containing the topography height
838	IF ( myid == 0 ) THEN
839
840	ALLOCATE( zu_s_inner(0:nx+1,0:ny+1), zw_w_inner(0:nx+1,0:ny+1) )
841
842	DO i = 0, nx + 1
843	DO j = 0, ny + 1
844	zu_s_inner(i,j) = zu(nzb_local(j,i))
845	zw_w_inner(i,j) = zw(nzb_local(j,i))
846	ENDDO
847	ENDDO
848
849	ENDIF
850	#endif
851	ENDIF
852
853	#if ! defined ( __check )
854	!
855	!-- Preliminary: to be removed after completion of the topography code!
856	!-- Set the former default k index arrays nzb_2d
857	nzb_2d = nzb
858
859	!
860	!-- Set the individual index arrays which define the k index from which on
861	!-- the usual finite difference form (which does not use surface fluxes) is
862	!-- applied
863	IF ( prandtl_layer .OR. use_surface_fluxes ) THEN
864	nzb_diff_u = nzb_u_inner + 2
865	nzb_diff_v = nzb_v_inner + 2
866	nzb_diff_s_inner = nzb_s_inner + 2
867	nzb_diff_s_outer = nzb_s_outer + 2
868	ELSE
869	nzb_diff_u = nzb_u_inner + 1
870	nzb_diff_v = nzb_v_inner + 1
871	nzb_diff_s_inner = nzb_s_inner + 1
872	nzb_diff_s_outer = nzb_s_outer + 1
873	ENDIF
874
875	!
876	!-- Calculation of wall switches and factors required by diffusion_u/v.f90 and
877	!-- for limitation of near-wall mixing length l_wall further below
878	corner_nl = 0
879	corner_nr = 0
880	corner_sl = 0
881	corner_sr = 0
882	wall_l = 0
883	wall_n = 0
884	wall_r = 0
885	wall_s = 0
886
887	DO i = nxl, nxr
888	DO j = nys, nyn
889	!
890	!-- u-component
891	IF ( nzb_u_outer(j,i) > nzb_u_outer(j+1,i) ) THEN
892	wall_u(j,i) = 1.0 ! north wall (location of adjacent fluid)
893	fym(j,i) = 0.0
894	fyp(j,i) = 1.0
895	ELSEIF ( nzb_u_outer(j,i) > nzb_u_outer(j-1,i) ) THEN
896	wall_u(j,i) = 1.0 ! south wall (location of adjacent fluid)
897	fym(j,i) = 1.0
898	fyp(j,i) = 0.0
899	ENDIF
900	!
901	!-- v-component
902	IF ( nzb_v_outer(j,i) > nzb_v_outer(j,i+1) ) THEN
903	wall_v(j,i) = 1.0 ! rigth wall (location of adjacent fluid)
904	fxm(j,i) = 0.0
905	fxp(j,i) = 1.0
906	ELSEIF ( nzb_v_outer(j,i) > nzb_v_outer(j,i-1) ) THEN
907	wall_v(j,i) = 1.0 ! left wall (location of adjacent fluid)
908	fxm(j,i) = 1.0
909	fxp(j,i) = 0.0
910	ENDIF
911	!
912	!-- w-component, also used for scalars, separate arrays for shear
913	!-- production of tke
914	IF ( nzb_w_outer(j,i) > nzb_w_outer(j+1,i) ) THEN
915	wall_e_y(j,i) = 1.0 ! north wall (location of adjacent fluid)
916	wall_w_y(j,i) = 1.0
917	fwym(j,i) = 0.0
918	fwyp(j,i) = 1.0
919	ELSEIF ( nzb_w_outer(j,i) > nzb_w_outer(j-1,i) ) THEN
920	wall_e_y(j,i) = -1.0 ! south wall (location of adjacent fluid)
921	wall_w_y(j,i) = 1.0
922	fwym(j,i) = 1.0
923	fwyp(j,i) = 0.0
924	ENDIF
925	IF ( nzb_w_outer(j,i) > nzb_w_outer(j,i+1) ) THEN
926	wall_e_x(j,i) = 1.0 ! right wall (location of adjacent fluid)
927	wall_w_x(j,i) = 1.0
928	fwxm(j,i) = 0.0
929	fwxp(j,i) = 1.0
930	ELSEIF ( nzb_w_outer(j,i) > nzb_w_outer(j,i-1) ) THEN
931	wall_e_x(j,i) = -1.0 ! left wall (location of adjacent fluid)
932	wall_w_x(j,i) = 1.0
933	fwxm(j,i) = 1.0
934	fwxp(j,i) = 0.0
935	ENDIF
936	!
937	!-- Wall and corner locations inside buildings for limitation of
938	!-- near-wall mixing length l_wall
939	IF ( nzb_s_inner(j,i) > nzb_s_inner(j+1,i) ) THEN
940
941	wall_n(j,i) = nzb_s_inner(j+1,i) + 1 ! North wall
942
943	IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i-1) ) THEN
944	corner_nl(j,i) = MAX( nzb_s_inner(j+1,i), & ! Northleft corner
945	nzb_s_inner(j,i-1) ) + 1
946	ENDIF
947
948	IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i+1) ) THEN
949	corner_nr(j,i) = MAX( nzb_s_inner(j+1,i), & ! Northright corner
950	nzb_s_inner(j,i+1) ) + 1
951	ENDIF
952
953	ENDIF
954
955	IF ( nzb_s_inner(j,i) > nzb_s_inner(j-1,i) ) THEN
956
957	wall_s(j,i) = nzb_s_inner(j-1,i) + 1 ! South wall
958	IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i-1) ) THEN
959	corner_sl(j,i) = MAX( nzb_s_inner(j-1,i), & ! Southleft corner
960	nzb_s_inner(j,i-1) ) + 1
961	ENDIF
962
963	IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i+1) ) THEN
964	corner_sr(j,i) = MAX( nzb_s_inner(j-1,i), & ! Southright corner
965	nzb_s_inner(j,i+1) ) + 1
966	ENDIF
967
968	ENDIF
969
970	IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i-1) ) THEN
971	wall_l(j,i) = nzb_s_inner(j,i-1) + 1 ! Left wall
972	ENDIF
973
974	IF ( nzb_s_inner(j,i) > nzb_s_inner(j,i+1) ) THEN
975	wall_r(j,i) = nzb_s_inner(j,i+1) + 1 ! Right wall
976	ENDIF
977
978	ENDDO
979	ENDDO
980
981	!
982	!-- Calculate wall flag arrays for the multigrid method
983	IF ( psolver == 'multigrid' ) THEN
984	!
985	!-- Gridpoint increment of the current level
986	inc = 1
987
988	DO l = maximum_grid_level, 1 , -1
989
990	nxl_l = nxl_mg(l)
991	nxr_l = nxr_mg(l)
992	nys_l = nys_mg(l)
993	nyn_l = nyn_mg(l)
994	nzt_l = nzt_mg(l)
995
996	!
997	!-- Assign the flag level to be calculated
998	SELECT CASE ( l )
999	CASE ( 1 )
1000	flags => wall_flags_1
1001	CASE ( 2 )
1002	flags => wall_flags_2
1003	CASE ( 3 )
1004	flags => wall_flags_3
1005	CASE ( 4 )
1006	flags => wall_flags_4
1007	CASE ( 5 )
1008	flags => wall_flags_5
1009	CASE ( 6 )
1010	flags => wall_flags_6
1011	CASE ( 7 )
1012	flags => wall_flags_7
1013	CASE ( 8 )
1014	flags => wall_flags_8
1015	CASE ( 9 )
1016	flags => wall_flags_9
1017	CASE ( 10 )
1018	flags => wall_flags_10
1019	END SELECT
1020
1021	!
1022	!-- Depending on the grid level, set the respective bits in case of
1023	!-- neighbouring walls
1024	!-- Bit 0: wall to the bottom
1025	!-- Bit 1: wall to the top (not realized in remaining PALM code so far)
1026	!-- Bit 2: wall to the south
1027	!-- Bit 3: wall to the north
1028	!-- Bit 4: wall to the left
1029	!-- Bit 5: wall to the right
1030	!-- Bit 6: inside building
1031
1032	flags = 0
1033
1034	!
1035	!-- In case of masking method, flags are not set and multigrid method
1036	!-- works like FFT-solver
1037	IF ( .NOT. masking_method ) THEN
1038
1039	DO i = nxl_l-1, nxr_l+1
1040	DO j = nys_l-1, nyn_l+1
1041	DO k = nzb, nzt_l+1
1042
1043	!
1044	!-- Inside/outside building (inside building does not need
1045	!-- further tests for walls)
1046	IF ( kinc <= nzb_local(jinc,i*inc) ) THEN
1047
1048	flags(k,j,i) = IBSET( flags(k,j,i), 6 )
1049
1050	ELSE
1051	!
1052	!-- Bottom wall
1053	IF ( (k-1)inc <= nzb_local(jinc,i*inc) ) THEN
1054	flags(k,j,i) = IBSET( flags(k,j,i), 0 )
1055	ENDIF
1056	!
1057	!-- South wall
1058	IF ( kinc <= nzb_local((j-1)inc,i*inc) ) THEN
1059	flags(k,j,i) = IBSET( flags(k,j,i), 2 )
1060	ENDIF
1061	!
1062	!-- North wall
1063	IF ( kinc <= nzb_local((j+1)inc,i*inc) ) THEN
1064	flags(k,j,i) = IBSET( flags(k,j,i), 3 )
1065	ENDIF
1066	!
1067	!-- Left wall
1068	IF ( kinc <= nzb_local(jinc,(i-1)*inc) ) THEN
1069	flags(k,j,i) = IBSET( flags(k,j,i), 4 )
1070	ENDIF
1071	!
1072	!-- Right wall
1073	IF ( kinc <= nzb_local(jinc,(i+1)*inc) ) THEN
1074	flags(k,j,i) = IBSET( flags(k,j,i), 5 )
1075	ENDIF
1076
1077	ENDIF
1078
1079	ENDDO
1080	ENDDO
1081	ENDDO
1082
1083	ENDIF
1084
1085	!
1086	!-- Test output of flag arrays
1087	! i = nxl_l
1088	! WRITE (9,*) ' '
1089	! WRITE (9,) ' mg level ', l, ' *', mg_switch_to_pe0_level
1090	! WRITE (9,*) ' inc=', inc, ' i =', nxl_l
1091	! WRITE (9,*) ' nxl_l',nxl_l,' nxr_l=',nxr_l,' nys_l=',nys_l,' nyn_l=',nyn_l
1092	! DO k = nzt_l+1, nzb, -1
1093	! WRITE (9,'(194(1X,I2))') ( flags(k,j,i), j = nys_l-1, nyn_l+1 )
1094	! ENDDO
1095
1096	inc = inc * 2
1097
1098	ENDDO
1099
1100	ENDIF
1101	!
1102	!-- Allocate flags needed for masking walls.
1103	ALLOCATE( wall_flags_0(nzb:nzt,nys:nyn,nxl:nxr) )
1104	wall_flags_0 = 0
1105
1106	IF ( scalar_advec == 'ws-scheme' ) THEN
1107	!
1108	!-- Set flags to steer the degradation of the advection scheme in advec_ws
1109	!-- near topography, inflow- and outflow boundaries as well as bottom and
1110	!-- top of model domain. wall_flags_0 remains zero for all non-prognostic
1111	!-- grid points.
1112	DO i = nxl, nxr
1113	DO j = nys, nyn
1114	DO k = nzb_s_inner(j,i)+1, nzt
1115	!
1116	!-- scalar - x-direction
1117	!-- WS1 (0), WS3 (1), WS5 (2)
1118	IF ( k <= nzb_s_inner(j,i+1) .OR. ( ( inflow_l .OR. outflow_l )&
1119	.AND. i == nxl ) .OR. ( ( inflow_r .OR. outflow_r ) &
1120	.AND. i == nxr ) ) THEN
1121	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 0 )
1122	ELSEIF ( k <= nzb_s_inner(j,i+2) .OR. k <= nzb_s_inner(j,i-1) &
1123	.OR. ( ( inflow_r .OR. outflow_r ) .AND. i == nxr-1 ) &
1124	.OR. ( ( inflow_l .OR. outflow_l ) .AND. i == nxlu ) &
1125	) THEN
1126	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 1 )
1127	ELSE
1128	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 2 )
1129	ENDIF
1130	!
1131	!-- scalar - y-direction
1132	!-- WS1 (3), WS3 (4), WS5 (5)
1133	IF ( k <= nzb_s_inner(j+1,i) .OR. ( ( inflow_s .OR. outflow_s )&
1134	.AND. j == nys ) .OR. ( ( inflow_n .OR. outflow_n ) &
1135	.AND. j == nyn ) ) THEN
1136	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 3 )
1137	!-- WS3
1138	ELSEIF ( k <= nzb_s_inner(j+2,i) .OR. k <= nzb_s_inner(j-1,i) &
1139	.OR. ( ( inflow_s .OR. outflow_s ) .AND. j == nysv ) &
1140	.OR. ( ( inflow_n .OR. outflow_n ) .AND. j == nyn-1 ) &
1141	) THEN
1142	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 4 )
1143	!-- WS5
1144	ELSE
1145	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 5 )
1146	ENDIF
1147	!
1148	!-- scalar - z-direction
1149	!-- WS1 (6), WS3 (7), WS5 (8)
1150	flag_set = .FALSE.
1151	IF ( k == nzb_s_inner(j,i) + 1 .OR. k == nzt ) THEN
1152	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 6 )
1153	flag_set = .TRUE.
1154	ELSEIF ( k == nzb_s_inner(j,i) + 2 .OR. k == nzt - 1 ) THEN
1155	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 7 )
1156	flag_set = .TRUE.
1157	ELSEIF ( k > nzb_s_inner(j,i) .AND. .NOT. flag_set ) THEN
1158	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 8 )
1159	ENDIF
1160	ENDDO
1161	ENDDO
1162	ENDDO
1163	ENDIF
1164
1165	IF ( momentum_advec == 'ws-scheme' ) THEN
1166	!
1167	!-- Set wall_flags_0 to steer the degradation of the advection scheme in advec_ws
1168	!-- near topography, inflow- and outflow boundaries as well as bottom and
1169	!-- top of model domain. wall_flags_0 remains zero for all non-prognostic
1170	!-- grid points.
1171	DO i = nxl, nxr
1172	DO j = nys, nyn
1173	DO k = nzb_u_inner(j,i)+1, nzt
1174	!
1175	!-- u component - x-direction
1176	!-- WS1 (9), WS3 (10), WS5 (11)
1177	IF ( k <= nzb_u_inner(j,i+1) &
1178	.OR. ( ( inflow_l .OR. outflow_l ) .AND. i == nxlu ) &
1179	.OR. ( ( inflow_r .OR. outflow_r ) .AND. i == nxr ) &
1180	) THEN
1181	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 9 )
1182	ELSEIF ( k <= nzb_u_inner(j,i+2) .OR. k <= nzb_u_inner(j,i-1) &
1183	.OR. ( ( inflow_r .OR. outflow_r ) .AND. i == nxr-1 )&
1184	.OR. ( ( inflow_l .OR. outflow_l ) .AND. i == nxlu+1)&
1185	) THEN
1186	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 10 )
1187	ELSE
1188	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 11 )
1189	ENDIF
1190
1191	!
1192	!-- u component - y-direction
1193	!-- WS1 (12), WS3 (13), WS5 (14)
1194	IF ( k <= nzb_u_inner(j+1,i) .OR. ( ( inflow_s .OR. outflow_s )&
1195	.AND. j == nys ) .OR. ( ( inflow_n .OR. outflow_n ) &
1196	.AND. j == nyn ) ) THEN
1197	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 12 )
1198	ELSEIF ( k <= nzb_u_inner(j+2,i) .OR. k <= nzb_u_inner(j-1,i) &
1199	.OR. ( ( inflow_s .OR. outflow_s ) .AND. j == nysv ) &
1200	.OR. ( ( inflow_n .OR. outflow_n ) .AND. j == nyn-1 ) &
1201	) THEN
1202	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 13 )
1203	ELSE
1204	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 14 )
1205	ENDIF
1206	!
1207	!-- u component - z-direction
1208	!-- WS1 (15), WS3 (16), WS5 (17)
1209	flag_set = .FALSE.
1210	IF ( k == nzb_u_inner(j,i) + 1 .OR. k == nzt ) THEN
1211	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 15 )
1212	flag_set = .TRUE.
1213	ELSEIF ( k == nzb_u_inner(j,i) + 2 .OR. k == nzt - 1 ) THEN
1214	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 16 )
1215	flag_set = .TRUE.
1216	ELSEIF ( k > nzb_u_inner(j,i) .AND. .NOT. flag_set ) THEN
1217	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 17 )
1218	ENDIF
1219
1220	ENDDO
1221	ENDDO
1222	ENDDO
1223
1224	DO i = nxl, nxr
1225	DO j = nys, nyn
1226	DO k = nzb_v_inner(j,i)+1, nzt
1227	!
1228	!-- v component - x-direction
1229	!-- WS1 (18), WS3 (19), WS5 (20)
1230	IF ( k <= nzb_v_inner(j,i+1) .OR. ( ( inflow_l .OR. outflow_l )&
1231	.AND. i == nxl ) .OR. (( inflow_r .OR. outflow_r ) &
1232	.AND. i == nxr ) ) THEN
1233	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 18 )
1234	!-- WS3
1235	ELSEIF ( k <= nzb_v_inner(j,i+2) .OR. k <= nzb_v_inner(j,i-1) &
1236	.OR. ( ( inflow_r .OR. outflow_r ) .AND. i == nxr-1 ) &
1237	.OR. ( ( inflow_l .OR. outflow_l ) .AND. i == nxlu ) &
1238	) THEN
1239	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 19 )
1240	ELSE
1241	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 20 )
1242	ENDIF
1243	!
1244	!-- v component - y-direction
1245	!-- WS1 (21), WS3 (22), WS5 (23)
1246	IF ( k <= nzb_v_inner(j+1,i) &
1247	.OR. ( ( inflow_s .OR. outflow_s ) .AND. i == nysv ) &
1248	.OR. ( ( inflow_n .OR. outflow_n ) .AND. j == nyn ) &
1249	) THEN
1250	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 21 )
1251	ELSEIF ( k <= nzb_v_inner(j+2,i) .OR. k <= nzb_v_inner(j-1,i) &
1252	.OR. ( ( inflow_s .OR. outflow_s ) .AND. j == nysv+1 )&
1253	.OR. ( ( inflow_n .OR. outflow_n ) .AND. j == nyn-1 )&
1254	) THEN
1255	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 22 )
1256	ELSE
1257	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 23 )
1258	ENDIF
1259	!
1260	!-- v component - z-direction
1261	!-- WS1 (24), WS3 (25), WS5 (26)
1262	flag_set = .FALSE.
1263	IF ( k == nzb_v_inner(j,i) + 1 .OR. k == nzt ) THEN
1264	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 24 )
1265	flag_set = .TRUE.
1266	ELSEIF ( k == nzb_v_inner(j,i) + 2 .OR. k == nzt - 1 ) THEN
1267	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 25 )
1268	flag_set = .TRUE.
1269	ELSEIF ( k > nzb_v_inner(j,i) .AND. .NOT. flag_set ) THEN
1270	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 26 )
1271	ENDIF
1272
1273	ENDDO
1274	ENDDO
1275	ENDDO
1276	DO i = nxl, nxr
1277	DO j = nys, nyn
1278	DO k = nzb_w_inner(j,i), nzt
1279	!
1280	!-- w component - x-direction
1281	!-- WS1 (27), WS3 (28), WS5 (29)
1282	IF ( k <= nzb_w_inner(j,i+1) .OR. ( ( inflow_l .OR. outflow_l )&
1283	.AND. i == nxl ) .OR. ( ( inflow_r .OR. outflow_r ) &
1284	.AND. i == nxr ) ) THEN
1285	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 27 )
1286	ELSEIF ( k <= nzb_w_inner(j,i+2) .OR. k <= nzb_w_inner(j,i-1) &
1287	.OR. ( ( inflow_r .OR. outflow_r ) .AND. i == nxr-1 ) &
1288	.OR. ( ( inflow_l .OR. outflow_l ) .AND. i == nxlu ) &
1289	) THEN
1290	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 28 )
1291	ELSE
1292	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i),29 )
1293	ENDIF
1294	!
1295	!-- w component - y-direction
1296	!-- WS1 (30), WS3 (31), WS5 (32)
1297	IF ( k <= nzb_w_inner(j+1,i) .OR. ( ( inflow_s .OR. outflow_s )&
1298	.AND. j == nys ) .OR. ( ( inflow_n .OR. outflow_n ) &
1299	.AND. j == nyn ) ) THEN
1300	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 30 )
1301	ELSEIF ( k <= nzb_w_inner(j+2,i) .OR. k <= nzb_w_inner(j-1,i) &
1302	.OR. ( ( inflow_s .OR. outflow_s ) .AND. j == nysv ) &
1303	.OR. ( ( inflow_n .OR. outflow_n ) .AND. j == nyn-1 ) &
1304	) THEN
1305	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 31 )
1306	ELSE
1307	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 32 )
1308	ENDIF
1309	!
1310	!-- w component - z-direction
1311	!-- WS1 (33), WS3 (34), WS5 (35)
1312	flag_set = .FALSE.
1313	IF ( k == nzb_w_inner(j,i) .OR. k == nzb_w_inner(j,i) + 1 &
1314	.OR. k == nzt ) THEN
1315	!
1316	!-- Please note, at k == nzb_w_inner(j,i) a flag is explictely
1317	!-- set, although this is not a prognostic level. However,
1318	!-- contrary to the advection of u,v and s this is necessary
1319	!-- because flux_t(nzb_w_inner(j,i)) is used for the tendency
1320	!-- at k == nzb_w_inner(j,i)+1.
1321	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 33 )
1322	flag_set = .TRUE.
1323	ELSEIF ( k == nzb_w_inner(j,i) + 2 .OR. k == nzt - 1 ) THEN
1324	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 34 )
1325	flag_set = .TRUE.
1326	ELSEIF ( k > nzb_w_inner(j,i) .AND. .NOT. flag_set ) THEN
1327	wall_flags_0(k,j,i) = IBSET( wall_flags_0(k,j,i), 35 )
1328	ENDIF
1329
1330	ENDDO
1331	ENDDO
1332	ENDDO
1333
1334	ENDIF
1335
1336	!
1337	!-- In case of topography: limit near-wall mixing length l_wall further:
1338	!-- Go through all points of the subdomain one by one and look for the closest
1339	!-- surface
1340	IF ( TRIM(topography) /= 'flat' ) THEN
1341	DO i = nxl, nxr
1342	DO j = nys, nyn
1343
1344	nzb_si = nzb_s_inner(j,i)
1345	vi = vertical_influence(nzb_si)
1346
1347	IF ( wall_n(j,i) > 0 ) THEN
1348	!
1349	!-- North wall (y distance)
1350	DO k = wall_n(j,i), nzb_si
1351	l_wall(k,j+1,i) = MIN( l_wall(k,j+1,i), 0.5 * dy )
1352	ENDDO
1353	!
1354	!-- Above North wall (yz distance)
1355	DO k = nzb_si + 1, nzb_si + vi
1356	l_wall(k,j+1,i) = MIN( l_wall(k,j+1,i), &
1357	SQRT( 0.25 * dy**2 + &
1358	( zu(k) - zw(nzb_si) )**2 ) )
1359	ENDDO
1360	!
1361	!-- Northleft corner (xy distance)
1362	IF ( corner_nl(j,i) > 0 ) THEN
1363	DO k = corner_nl(j,i), nzb_si
1364	l_wall(k,j+1,i-1) = MIN( l_wall(k,j+1,i-1), &
1365	0.5 * SQRT( dx2 + dy2 ) )
1366	ENDDO
1367	!
1368	!-- Above Northleft corner (xyz distance)
1369	DO k = nzb_si + 1, nzb_si + vi
1370	l_wall(k,j+1,i-1) = MIN( l_wall(k,j+1,i-1), &
1371	SQRT( 0.25 * (dx2 + dy2) + &
1372	( zu(k) - zw(nzb_si) )**2 ) )
1373	ENDDO
1374	ENDIF
1375	!
1376	!-- Northright corner (xy distance)
1377	IF ( corner_nr(j,i) > 0 ) THEN
1378	DO k = corner_nr(j,i), nzb_si
1379	l_wall(k,j+1,i+1) = MIN( l_wall(k,j+1,i+1), &
1380	0.5 * SQRT( dx2 + dy2 ) )
1381	ENDDO
1382	!
1383	!-- Above northright corner (xyz distance)
1384	DO k = nzb_si + 1, nzb_si + vi
1385	l_wall(k,j+1,i+1) = MIN( l_wall(k,j+1,i+1), &
1386	SQRT( 0.25 * (dx2 + dy2) + &
1387	( zu(k) - zw(nzb_si) )**2 ) )
1388	ENDDO
1389	ENDIF
1390	ENDIF
1391
1392	IF ( wall_s(j,i) > 0 ) THEN
1393	!
1394	!-- South wall (y distance)
1395	DO k = wall_s(j,i), nzb_si
1396	l_wall(k,j-1,i) = MIN( l_wall(k,j-1,i), 0.5 * dy )
1397	ENDDO
1398	!
1399	!-- Above south wall (yz distance)
1400	DO k = nzb_si + 1, &
1401	nzb_si + vi
1402	l_wall(k,j-1,i) = MIN( l_wall(k,j-1,i), &
1403	SQRT( 0.25 * dy**2 + &
1404	( zu(k) - zw(nzb_si) )**2 ) )
1405	ENDDO
1406	!
1407	!-- Southleft corner (xy distance)
1408	IF ( corner_sl(j,i) > 0 ) THEN
1409	DO k = corner_sl(j,i), nzb_si
1410	l_wall(k,j-1,i-1) = MIN( l_wall(k,j-1,i-1), &
1411	0.5 * SQRT( dx2 + dy2 ) )
1412	ENDDO
1413	!
1414	!-- Above southleft corner (xyz distance)
1415	DO k = nzb_si + 1, nzb_si + vi
1416	l_wall(k,j-1,i-1) = MIN( l_wall(k,j-1,i-1), &
1417	SQRT( 0.25 * (dx2 + dy2) + &
1418	( zu(k) - zw(nzb_si) )**2 ) )
1419	ENDDO
1420	ENDIF
1421	!
1422	!-- Southright corner (xy distance)
1423	IF ( corner_sr(j,i) > 0 ) THEN
1424	DO k = corner_sr(j,i), nzb_si
1425	l_wall(k,j-1,i+1) = MIN( l_wall(k,j-1,i+1), &
1426	0.5 * SQRT( dx2 + dy2 ) )
1427	ENDDO
1428	!
1429	!-- Above southright corner (xyz distance)
1430	DO k = nzb_si + 1, nzb_si + vi
1431	l_wall(k,j-1,i+1) = MIN( l_wall(k,j-1,i+1), &
1432	SQRT( 0.25 * (dx2 + dy2) + &
1433	( zu(k) - zw(nzb_si) )**2 ) )
1434	ENDDO
1435	ENDIF
1436
1437	ENDIF
1438
1439	IF ( wall_l(j,i) > 0 ) THEN
1440	!
1441	!-- Left wall (x distance)
1442	DO k = wall_l(j,i), nzb_si
1443	l_wall(k,j,i-1) = MIN( l_wall(k,j,i-1), 0.5 * dx )
1444	ENDDO
1445	!
1446	!-- Above left wall (xz distance)
1447	DO k = nzb_si + 1, nzb_si + vi
1448	l_wall(k,j,i-1) = MIN( l_wall(k,j,i-1), &
1449	SQRT( 0.25 * dx**2 + &
1450	( zu(k) - zw(nzb_si) )**2 ) )
1451	ENDDO
1452	ENDIF
1453
1454	IF ( wall_r(j,i) > 0 ) THEN
1455	!
1456	!-- Right wall (x distance)
1457	DO k = wall_r(j,i), nzb_si
1458	l_wall(k,j,i+1) = MIN( l_wall(k,j,i+1), 0.5 * dx )
1459	ENDDO
1460	!
1461	!-- Above right wall (xz distance)
1462	DO k = nzb_si + 1, nzb_si + vi
1463	l_wall(k,j,i+1) = MIN( l_wall(k,j,i+1), &
1464	SQRT( 0.25 * dx**2 + &
1465	( zu(k) - zw(nzb_si) )**2 ) )
1466	ENDDO
1467
1468	ENDIF
1469
1470	ENDDO
1471	ENDDO
1472
1473	ENDIF
1474
1475	!
1476	!-- Multiplication with wall_adjustment_factor
1477	l_wall = wall_adjustment_factor * l_wall
1478
1479	!
1480	!-- Set lateral boundary conditions for l_wall
1481	CALL exchange_horiz( l_wall, nbgp )
1482
1483	DEALLOCATE( corner_nl, corner_nr, corner_sl, corner_sr, nzb_local, &
1484	nzb_tmp, vertical_influence, wall_l, wall_n, wall_r, wall_s )
1485
1486	#endif
1487
1488	END SUBROUTINE init_grid

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

Download in other formats:

| Impressum | ©Leibniz Universität Hannover |