Home

Context Navigation

source: palm/trunk/SOURCE/boundary_conds.f90 @ 4089

Last change on this file since 4089 was 4087, checked in by gronemeier, 5 years ago
Add comment (boundary_conds.f90)
Property svn:keywords set to `Id`
File size: 48.4 KB

Line
1	!> @file boundary_conds.f90
2	!------------------------------------------------------------------------------!
3	! This file is part of the PALM model system.
4	!
5	! PALM is free software: you can redistribute it and/or modify it under the
6	! terms of the GNU General Public License as published by the Free Software
7	! Foundation, either version 3 of the License, or (at your option) any later
8	! version.
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 1997-2019 Leibniz Universitaet Hannover
18	!------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! -----------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: boundary_conds.f90 4087 2019-07-11 11:35:23Z suehring $
27	! Add comment
28	!
29	! 4086 2019-07-11 05:55:44Z gronemeier
30	! Bugfix: use constant-flux layer condition for e in all rans modes
31	!
32	! 3879 2019-04-08 20:25:23Z knoop
33	! Bugfix, do not set boundary conditions for potential temperature in neutral
34	! runs.
35	!
36	! 3655 2019-01-07 16:51:22Z knoop
37	! OpenACC port for SPEC
38	!
39	! 3589 2018-11-30 15:09:51Z suehring
40	! Move the control parameter "salsa" from salsa_mod to control_parameters
41	! (M. Kurppa)
42	!
43	! 3582 2018-11-29 19:16:36Z suehring
44	! variables documented
45	!
46	! 3467 2018-10-30 19:05:21Z suehring
47	! Implementation of a new aerosol module salsa.
48	!
49	! 3347 2018-10-15 14:21:08Z suehring
50	! Bugfix in setting boundary conditions in offline nesting
51	!
52	! 3341 2018-10-15 10:31:27Z suehring
53	! changes concerning modularization of ocean option
54	!
55	! 3274 2018-09-24 15:42:55Z knoop
56	! Modularization of all bulk cloud physics code components
57	!
58	! 3241 2018-09-12 15:02:00Z raasch
59	! unused variables removed
60	!
61	! 3183 2018-07-27 14:25:55Z suehring
62	! Rename some variables concerning LES-LES as well as offline nesting
63	!
64	! 3182 2018-07-27 13:36:03Z suehring
65	! - Use wall function for e_p and diss_p in case of rans_tke_e
66	! - move limitation of diss_p from tcm_prognostic
67	!
68	! 2938 2018-03-27 15:52:42Z suehring
69	! Set boundary condition for TKE and TKE dissipation rate in case of nesting
70	! and if parent model operates in RANS mode but child model in LES mode.
71	! mode
72	!
73	! 2793 2018-02-07 10:54:33Z suehring
74	! Removed preprocessor directive __chem
75	!
76	! 2718 2018-01-02 08:49:38Z maronga
77	! Corrected "Former revisions" section
78	!
79	! 2696 2017-12-14 17:12:51Z kanani
80	! Change in file header (GPL part)
81	! Adjust boundary conditions for e and diss in case of TKE-e closure (TG)
82	! Implementation of chemistry module (FK)
83	!
84	! 2569 2017-10-20 11:54:42Z kanani
85	! Removed redundant code for ibc_s_b=1 and ibc_q_b=1
86	!
87	! 2365 2017-08-21 14:59:59Z kanani
88	! Vertical grid nesting implemented: exclude setting vertical velocity to zero
89	! on fine grid (SadiqHuq)
90	!
91	! 2320 2017-07-21 12:47:43Z suehring
92	! Remove unused control parameter large_scale_forcing from only-list
93	!
94	! 2292 2017-06-20 09:51:42Z schwenkel
95	! Implementation of new microphysic scheme: cloud_scheme = 'morrison'
96	! includes two more prognostic equations for cloud drop concentration (nc)
97	! and cloud water content (qc).
98	!
99	! 2233 2017-05-30 18:08:54Z suehring
100	!
101	! 2232 2017-05-30 17:47:52Z suehring
102	! Set boundary conditions on topography top using flag method.
103	!
104	! 2118 2017-01-17 16:38:49Z raasch
105	! OpenACC directives removed
106	!
107	! 2000 2016-08-20 18:09:15Z knoop
108	! Forced header and separation lines into 80 columns
109	!
110	! 1992 2016-08-12 15:14:59Z suehring
111	! Adjustments for top boundary condition for passive scalar
112	!
113	! 1960 2016-07-12 16:34:24Z suehring
114	! Treat humidity and passive scalar separately
115	!
116	! 1823 2016-04-07 08:57:52Z hoffmann
117	! Initial version of purely vertical nesting introduced.
118	!
119	! 1822 2016-04-07 07:49:42Z hoffmann
120	! icloud_scheme removed. microphyisics_seifert added.
121	!
122	! 1764 2016-02-28 12:45:19Z raasch
123	! index bug for u_p at left outflow removed
124	!
125	! 1762 2016-02-25 12:31:13Z hellstea
126	! Introduction of nested domain feature
127	!
128	! 1742 2016-01-13 09:50:06Z raasch
129	! bugfix for outflow Neumann boundary conditions at bottom and top
130	!
131	! 1717 2015-11-11 15:09:47Z raasch
132	! Bugfix: index error in outflow conditions for left boundary
133	!
134	! 1682 2015-10-07 23:56:08Z knoop
135	! Code annotations made doxygen readable
136	!
137	! 1410 2014-05-23 12:16:18Z suehring
138	! Bugfix: set dirichlet boundary condition for passive_scalar at model domain
139	! top
140	!
141	! 1399 2014-05-07 11:16:25Z heinze
142	! Bugfix: set inflow boundary conditions also if no humidity or passive_scalar
143	! is used.
144	!
145	! 1398 2014-05-07 11:15:00Z heinze
146	! Dirichlet-condition at the top for u and v changed to u_init and v_init also
147	! for large_scale_forcing
148	!
149	! 1380 2014-04-28 12:40:45Z heinze
150	! Adjust Dirichlet-condition at the top for pt in case of nudging
151	!
152	! 1361 2014-04-16 15:17:48Z hoffmann
153	! Bottom and top boundary conditions of rain water content (qr) and
154	! rain drop concentration (nr) changed to Dirichlet
155	!
156	! 1353 2014-04-08 15:21:23Z heinze
157	! REAL constants provided with KIND-attribute
158	!
159	! 1320 2014-03-20 08:40:49Z raasch
160	! ONLY-attribute added to USE-statements,
161	! kind-parameters added to all INTEGER and REAL declaration statements,
162	! kinds are defined in new module kinds,
163	! revision history before 2012 removed,
164	! comment fields (!:) to be used for variable explanations added to
165	! all variable declaration statements
166	!
167	! 1257 2013-11-08 15:18:40Z raasch
168	! loop independent clauses added
169	!
170	! 1241 2013-10-30 11:36:58Z heinze
171	! Adjust ug and vg at each timestep in case of large_scale_forcing
172	!
173	! 1159 2013-05-21 11:58:22Z fricke
174	! Bugfix: Neumann boundary conditions for the velocity components at the
175	! outflow are in fact radiation boundary conditions using the maximum phase
176	! velocity that ensures numerical stability (CFL-condition).
177	! Hence, logical operator use_cmax is now used instead of bc_lr_dirneu/_neudir.
178	! Bugfix: In case of use_cmax at the outflow, u, v, w are replaced by
179	! u_p, v_p, w_p
180	!
181	! 1115 2013-03-26 18:16:16Z hoffmann
182	! boundary conditions of two-moment cloud scheme are restricted to Neumann-
183	! boundary-conditions
184	!
185	! 1113 2013-03-10 02:48:14Z raasch
186	! GPU-porting
187	! dummy argument "range" removed
188	! Bugfix: wrong index in loops of radiation boundary condition
189	!
190	! 1053 2012-11-13 17:11:03Z hoffmann
191	! boundary conditions for the two new prognostic equations (nr, qr) of the
192	! two-moment cloud scheme
193	!
194	! 1036 2012-10-22 13:43:42Z raasch
195	! code put under GPL (PALM 3.9)
196	!
197	! 996 2012-09-07 10:41:47Z raasch
198	! little reformatting
199	!
200	! 978 2012-08-09 08:28:32Z fricke
201	! Neumann boudnary conditions are added at the inflow boundary for the SGS-TKE.
202	! Outflow boundary conditions for the velocity components can be set to Neumann
203	! conditions or to radiation conditions with a horizontal averaged phase
204	! velocity.
205	!
206	! 875 2012-04-02 15:35:15Z gryschka
207	! Bugfix in case of dirichlet inflow bc at the right or north boundary
208	!
209	! Revision 1.1 1997/09/12 06:21:34 raasch
210	! Initial revision
211	!
212	!
213	! Description:
214	! ------------
215	!> Boundary conditions for the prognostic quantities.
216	!> One additional bottom boundary condition is applied for the TKE (=(u)*2)
217	!> in prandtl_fluxes. The cyclic lateral boundary conditions are implicitly
218	!> handled in routine exchange_horiz. Pressure boundary conditions are
219	!> explicitly set in routines pres, poisfft, poismg and sor.
220	!------------------------------------------------------------------------------!
221	SUBROUTINE boundary_conds
222
223
224	USE arrays_3d, &
225	ONLY: c_u, c_u_m, c_u_m_l, c_v, c_v_m, c_v_m_l, c_w, c_w_m, c_w_m_l, &
226	diss, diss_p, dzu, e_p, nc_p, nr_p, pt, pt_init, pt_p, q, &
227	q_p, qc_p, qr_p, s, s_p, sa, sa_p, u, u_init, u_m_l, u_m_n, &
228	u_m_r, u_m_s, u_p, v, v_init, v_m_l, v_m_n, v_m_r, v_m_s, v_p, &
229	w, w_p, w_m_l, w_m_n, w_m_r, w_m_s
230
231	USE basic_constants_and_equations_mod, &
232	ONLY: kappa
233
234	USE bulk_cloud_model_mod, &
235	ONLY: bulk_cloud_model, microphysics_morrison, microphysics_seifert
236
237	USE chemistry_model_mod, &
238	ONLY: chem_boundary_conds
239
240	USE control_parameters, &
241	ONLY: air_chemistry, bc_dirichlet_l, bc_dirichlet_n, bc_dirichlet_r, &
242	bc_dirichlet_s, bc_radiation_l, bc_radiation_n, bc_radiation_r, &
243	bc_radiation_s, bc_pt_t_val, bc_q_t_val, bc_s_t_val, &
244	child_domain, constant_diffusion, coupling_mode, dt_3d, &
245	humidity, ibc_pt_b, ibc_pt_t, ibc_q_b, ibc_q_t, ibc_s_b, &
246	ibc_s_t, ibc_uv_b, ibc_uv_t, intermediate_timestep_count, &
247	nesting_offline, neutral, nudging, ocean_mode, passive_scalar, &
248	rans_mode, rans_tke_e, tsc, salsa, use_cmax
249
250	USE grid_variables, &
251	ONLY: ddx, ddy, dx, dy
252
253	USE indices, &
254	ONLY: nx, nxl, nxlg, nxr, nxrg, ny, nyn, nyng, nys, nysg, nzb, nzt
255
256	USE kinds
257
258	USE ocean_mod, &
259	ONLY: ibc_sa_t
260
261	USE pegrid
262
263	USE pmc_interface, &
264	ONLY : nesting_mode, rans_mode_parent
265
266	USE salsa_mod, &
267	ONLY: salsa_boundary_conds
268
269	USE surface_mod, &
270	ONLY : bc_h, surf_def_h, surf_def_v, surf_lsm_h, surf_lsm_v, &
271	surf_usm_h, surf_usm_v
272
273	USE turbulence_closure_mod, &
274	ONLY: c_0
275
276	IMPLICIT NONE
277
278	INTEGER(iwp) :: i !< grid index x direction
279	INTEGER(iwp) :: j !< grid index y direction
280	INTEGER(iwp) :: k !< grid index z direction
281	INTEGER(iwp) :: kb !< variable to set respective boundary value, depends on facing.
282	INTEGER(iwp) :: l !< running index boundary type, for up- and downward-facing walls
283	INTEGER(iwp) :: m !< running index surface elements
284
285	REAL(wp) :: c_max !< maximum phase velocity allowed by CFL criterion, used for outflow boundary condition
286	REAL(wp) :: denom !< horizontal gradient of velocity component normal to the outflow boundary
287
288
289	!
290	!-- Bottom boundary
291	IF ( ibc_uv_b == 1 ) THEN
292	u_p(nzb,:,:) = u_p(nzb+1,:,:)
293	v_p(nzb,:,:) = v_p(nzb+1,:,:)
294	ENDIF
295	!
296	!-- Set zero vertical velocity at topography top (l=0), or bottom (l=1) in case
297	!-- of downward-facing surfaces.
298	DO l = 0, 1
299	!
300	!-- Set kb, for upward-facing surfaces value at topography top (k-1) is set,
301	!-- for downward-facing surfaces at topography bottom (k+1).
302	kb = MERGE( -1, 1, l == 0 )
303	!$OMP PARALLEL DO PRIVATE( i, j, k )
304	!$ACC PARALLEL LOOP PRIVATE(i, j, k) &
305	!$ACC PRESENT(bc_h, w_p)
306	DO m = 1, bc_h(l)%ns
307	i = bc_h(l)%i(m)
308	j = bc_h(l)%j(m)
309	k = bc_h(l)%k(m)
310	w_p(k+kb,j,i) = 0.0_wp
311	ENDDO
312	ENDDO
313
314	!
315	!-- Top boundary. A nested domain ( ibc_uv_t = 3 ) does not require settings.
316	IF ( ibc_uv_t == 0 ) THEN
317	!$ACC KERNELS PRESENT(u_p, v_p, u_init, v_init)
318	u_p(nzt+1,:,:) = u_init(nzt+1)
319	v_p(nzt+1,:,:) = v_init(nzt+1)
320	!$ACC END KERNELS
321	ELSEIF ( ibc_uv_t == 1 ) THEN
322	u_p(nzt+1,:,:) = u_p(nzt,:,:)
323	v_p(nzt+1,:,:) = v_p(nzt,:,:)
324	ENDIF
325
326	!
327	!-- Vertical nesting: Vertical velocity not zero at the top of the fine grid
328	IF ( .NOT. child_domain .AND. .NOT. nesting_offline .AND. &
329	TRIM(coupling_mode) /= 'vnested_fine' ) THEN
330	!$ACC KERNELS PRESENT(w_p)
331	w_p(nzt:nzt+1,:,:) = 0.0_wp !< nzt is not a prognostic level (but cf. pres)
332	!$ACC END KERNELS
333	ENDIF
334
335	!
336	!-- Temperature at bottom and top boundary.
337	!-- In case of coupled runs (ibc_pt_b = 2) the temperature is given by
338	!-- the sea surface temperature of the coupled ocean model.
339	!-- Dirichlet
340	IF ( .NOT. neutral ) THEN
341	IF ( ibc_pt_b == 0 ) THEN
342	DO l = 0, 1
343	!
344	!-- Set kb, for upward-facing surfaces value at topography top (k-1)
345	!-- is set, for downward-facing surfaces at topography bottom (k+1).
346	kb = MERGE( -1, 1, l == 0 )
347	!$OMP PARALLEL DO PRIVATE( i, j, k )
348	DO m = 1, bc_h(l)%ns
349	i = bc_h(l)%i(m)
350	j = bc_h(l)%j(m)
351	k = bc_h(l)%k(m)
352	pt_p(k+kb,j,i) = pt(k+kb,j,i)
353	ENDDO
354	ENDDO
355	!
356	!-- Neumann, zero-gradient
357	ELSEIF ( ibc_pt_b == 1 ) THEN
358	DO l = 0, 1
359	!
360	!-- Set kb, for upward-facing surfaces value at topography top (k-1)
361	!-- is set, for downward-facing surfaces at topography bottom (k+1).
362	kb = MERGE( -1, 1, l == 0 )
363	!$OMP PARALLEL DO PRIVATE( i, j, k )
364	!$ACC PARALLEL LOOP PRIVATE(i, j, k) &
365	!$ACC PRESENT(bc_h, pt_p)
366	DO m = 1, bc_h(l)%ns
367	i = bc_h(l)%i(m)
368	j = bc_h(l)%j(m)
369	k = bc_h(l)%k(m)
370	pt_p(k+kb,j,i) = pt_p(k,j,i)
371	ENDDO
372	ENDDO
373	ENDIF
374
375	!
376	!-- Temperature at top boundary
377	IF ( ibc_pt_t == 0 ) THEN
378	pt_p(nzt+1,:,:) = pt(nzt+1,:,:)
379	!
380	!-- In case of nudging adjust top boundary to pt which is
381	!-- read in from NUDGING-DATA
382	IF ( nudging ) THEN
383	pt_p(nzt+1,:,:) = pt_init(nzt+1)
384	ENDIF
385	ELSEIF ( ibc_pt_t == 1 ) THEN
386	pt_p(nzt+1,:,:) = pt_p(nzt,:,:)
387	ELSEIF ( ibc_pt_t == 2 ) THEN
388	!$ACC KERNELS PRESENT(pt_p, dzu)
389	pt_p(nzt+1,:,:) = pt_p(nzt,:,:) + bc_pt_t_val * dzu(nzt+1)
390	!$ACC END KERNELS
391	ENDIF
392	ENDIF
393
394	!
395	!-- Boundary conditions for TKE.
396	!-- Generally Neumann conditions with de/dz=0 are assumed.
397	IF ( .NOT. constant_diffusion ) THEN
398
399	IF ( .NOT. rans_mode ) THEN
400	DO l = 0, 1
401	!
402	!-- Set kb, for upward-facing surfaces value at topography top (k-1) is set,
403	!-- for downward-facing surfaces at topography bottom (k+1).
404	kb = MERGE( -1, 1, l == 0 )
405	!$OMP PARALLEL DO PRIVATE( i, j, k )
406	!$ACC PARALLEL LOOP PRIVATE(i, j, k) &
407	!$ACC PRESENT(bc_h, e_p)
408	DO m = 1, bc_h(l)%ns
409	i = bc_h(l)%i(m)
410	j = bc_h(l)%j(m)
411	k = bc_h(l)%k(m)
412	e_p(k+kb,j,i) = e_p(k,j,i)
413	ENDDO
414	ENDDO
415	ELSE
416	!
417	!-- Use wall function within constant-flux layer
418	!-- Note, grid points listed in bc_h are not included in any calculations in RANS mode and
419	!-- are therefore not set here.
420	!
421	!-- Upward-facing surfaces
422	!-- Default surfaces
423	DO m = 1, surf_def_h(0)%ns
424	i = surf_def_h(0)%i(m)
425	j = surf_def_h(0)%j(m)
426	k = surf_def_h(0)%k(m)
427	e_p(k,j,i) = ( surf_def_h(0)%us(m) / c_0 )**2
428	ENDDO
429	!
430	!-- Natural surfaces
431	DO m = 1, surf_lsm_h%ns
432	i = surf_lsm_h%i(m)
433	j = surf_lsm_h%j(m)
434	k = surf_lsm_h%k(m)
435	e_p(k,j,i) = ( surf_lsm_h%us(m) / c_0 )**2
436	ENDDO
437	!
438	!-- Urban surfaces
439	DO m = 1, surf_usm_h%ns
440	i = surf_usm_h%i(m)
441	j = surf_usm_h%j(m)
442	k = surf_usm_h%k(m)
443	e_p(k,j,i) = ( surf_usm_h%us(m) / c_0 )**2
444	ENDDO
445	!
446	!-- Vertical surfaces
447	DO l = 0, 3
448	!
449	!-- Default surfaces
450	DO m = 1, surf_def_v(l)%ns
451	i = surf_def_v(l)%i(m)
452	j = surf_def_v(l)%j(m)
453	k = surf_def_v(l)%k(m)
454	e_p(k,j,i) = ( surf_def_v(l)%us(m) / c_0 )**2
455	ENDDO
456	!
457	!-- Natural surfaces
458	DO m = 1, surf_lsm_v(l)%ns
459	i = surf_lsm_v(l)%i(m)
460	j = surf_lsm_v(l)%j(m)
461	k = surf_lsm_v(l)%k(m)
462	e_p(k,j,i) = ( surf_lsm_v(l)%us(m) / c_0 )**2
463	ENDDO
464	!
465	!-- Urban surfaces
466	DO m = 1, surf_usm_v(l)%ns
467	i = surf_usm_v(l)%i(m)
468	j = surf_usm_v(l)%j(m)
469	k = surf_usm_v(l)%k(m)
470	e_p(k,j,i) = ( surf_usm_v(l)%us(m) / c_0 )**2
471	ENDDO
472	ENDDO
473	ENDIF
474
475	IF ( .NOT. child_domain ) THEN
476	!$ACC KERNELS PRESENT(e_p)
477	e_p(nzt+1,:,:) = e_p(nzt,:,:)
478	!$ACC END KERNELS
479	!
480	!-- Nesting case: if parent operates in RANS mode and child in LES mode,
481	!-- no TKE is transfered. This case, set Neumann conditions at lateral and
482	!-- top child boundaries.
483	!-- If not ( both either in RANS or in LES mode ), TKE boundary condition
484	!-- is treated in the nesting.
485	ELSE
486
487	IF ( rans_mode_parent .AND. .NOT. rans_mode ) THEN
488
489	e_p(nzt+1,:,:) = e_p(nzt,:,:)
490	IF ( bc_dirichlet_l ) e_p(:,:,nxl-1) = e_p(:,:,nxl)
491	IF ( bc_dirichlet_r ) e_p(:,:,nxr+1) = e_p(:,:,nxr)
492	IF ( bc_dirichlet_s ) e_p(:,nys-1,:) = e_p(:,nys,:)
493	IF ( bc_dirichlet_n ) e_p(:,nyn+1,:) = e_p(:,nyn,:)
494
495	ENDIF
496	ENDIF
497	ENDIF
498
499	!
500	!-- Boundary conditions for TKE dissipation rate.
501	IF ( rans_tke_e ) THEN
502	!
503	!-- Use wall function within constant-flux layer
504	!-- Upward-facing surfaces
505	!-- Default surfaces
506	DO m = 1, surf_def_h(0)%ns
507	i = surf_def_h(0)%i(m)
508	j = surf_def_h(0)%j(m)
509	k = surf_def_h(0)%k(m)
510	diss_p(k,j,i) = surf_def_h(0)%us(m)**3 &
511	/ ( kappa * surf_def_h(0)%z_mo(m) )
512	ENDDO
513	!
514	!-- Natural surfaces
515	DO m = 1, surf_lsm_h%ns
516	i = surf_lsm_h%i(m)
517	j = surf_lsm_h%j(m)
518	k = surf_lsm_h%k(m)
519	diss_p(k,j,i) = surf_lsm_h%us(m)**3 &
520	/ ( kappa * surf_lsm_h%z_mo(m) )
521	ENDDO
522	!
523	!-- Urban surfaces
524	DO m = 1, surf_usm_h%ns
525	i = surf_usm_h%i(m)
526	j = surf_usm_h%j(m)
527	k = surf_usm_h%k(m)
528	diss_p(k,j,i) = surf_usm_h%us(m)**3 &
529	/ ( kappa * surf_usm_h%z_mo(m) )
530	ENDDO
531	!
532	!-- Vertical surfaces
533	DO l = 0, 3
534	!
535	!-- Default surfaces
536	DO m = 1, surf_def_v(l)%ns
537	i = surf_def_v(l)%i(m)
538	j = surf_def_v(l)%j(m)
539	k = surf_def_v(l)%k(m)
540	diss_p(k,j,i) = surf_def_v(l)%us(m)**3 &
541	/ ( kappa * surf_def_v(l)%z_mo(m) )
542	ENDDO
543	!
544	!-- Natural surfaces
545	DO m = 1, surf_lsm_v(l)%ns
546	i = surf_lsm_v(l)%i(m)
547	j = surf_lsm_v(l)%j(m)
548	k = surf_lsm_v(l)%k(m)
549	diss_p(k,j,i) = surf_lsm_v(l)%us(m)**3 &
550	/ ( kappa * surf_lsm_v(l)%z_mo(m) )
551	ENDDO
552	!
553	!-- Urban surfaces
554	DO m = 1, surf_usm_v(l)%ns
555	i = surf_usm_v(l)%i(m)
556	j = surf_usm_v(l)%j(m)
557	k = surf_usm_v(l)%k(m)
558	diss_p(k,j,i) = surf_usm_v(l)%us(m)**3 &
559	/ ( kappa * surf_usm_v(l)%z_mo(m) )
560	ENDDO
561	ENDDO
562	!
563	!-- Limit change of diss to be between -90% and +100%. Also, set an absolute
564	!-- minimum value
565	DO i = nxl, nxr
566	DO j = nys, nyn
567	DO k = nzb, nzt+1
568	diss_p(k,j,i) = MAX( MIN( diss_p(k,j,i), &
569	2.0_wp * diss(k,j,i) ), &
570	0.1_wp * diss(k,j,i), &
571	0.0001_wp )
572	ENDDO
573	ENDDO
574	ENDDO
575
576	IF ( .NOT. child_domain ) THEN
577	diss_p(nzt+1,:,:) = diss_p(nzt,:,:)
578	ENDIF
579	ENDIF
580
581	!
582	!-- Boundary conditions for salinity
583	IF ( ocean_mode ) THEN
584	!
585	!-- Bottom boundary: Neumann condition because salinity flux is always
586	!-- given.
587	DO l = 0, 1
588	!
589	!-- Set kb, for upward-facing surfaces value at topography top (k-1) is set,
590	!-- for downward-facing surfaces at topography bottom (k+1).
591	kb = MERGE( -1, 1, l == 0 )
592	!$OMP PARALLEL DO PRIVATE( i, j, k )
593	DO m = 1, bc_h(l)%ns
594	i = bc_h(l)%i(m)
595	j = bc_h(l)%j(m)
596	k = bc_h(l)%k(m)
597	sa_p(k+kb,j,i) = sa_p(k,j,i)
598	ENDDO
599	ENDDO
600	!
601	!-- Top boundary: Dirichlet or Neumann
602	IF ( ibc_sa_t == 0 ) THEN
603	sa_p(nzt+1,:,:) = sa(nzt+1,:,:)
604	ELSEIF ( ibc_sa_t == 1 ) THEN
605	sa_p(nzt+1,:,:) = sa_p(nzt,:,:)
606	ENDIF
607
608	ENDIF
609
610	!
611	!-- Boundary conditions for total water content,
612	!-- bottom and top boundary (see also temperature)
613	IF ( humidity ) THEN
614	!
615	!-- Surface conditions for constant_humidity_flux
616	!-- Run loop over all non-natural and natural walls. Note, in wall-datatype
617	!-- the k coordinate belongs to the atmospheric grid point, therefore, set
618	!-- q_p at k-1
619	IF ( ibc_q_b == 0 ) THEN
620
621	DO l = 0, 1
622	!
623	!-- Set kb, for upward-facing surfaces value at topography top (k-1) is set,
624	!-- for downward-facing surfaces at topography bottom (k+1).
625	kb = MERGE( -1, 1, l == 0 )
626	!$OMP PARALLEL DO PRIVATE( i, j, k )
627	DO m = 1, bc_h(l)%ns
628	i = bc_h(l)%i(m)
629	j = bc_h(l)%j(m)
630	k = bc_h(l)%k(m)
631	q_p(k+kb,j,i) = q(k+kb,j,i)
632	ENDDO
633	ENDDO
634
635	ELSE
636
637	DO l = 0, 1
638	!
639	!-- Set kb, for upward-facing surfaces value at topography top (k-1) is set,
640	!-- for downward-facing surfaces at topography bottom (k+1).
641	kb = MERGE( -1, 1, l == 0 )
642	!$OMP PARALLEL DO PRIVATE( i, j, k )
643	DO m = 1, bc_h(l)%ns
644	i = bc_h(l)%i(m)
645	j = bc_h(l)%j(m)
646	k = bc_h(l)%k(m)
647	q_p(k+kb,j,i) = q_p(k,j,i)
648	ENDDO
649	ENDDO
650	ENDIF
651	!
652	!-- Top boundary
653	IF ( ibc_q_t == 0 ) THEN
654	q_p(nzt+1,:,:) = q(nzt+1,:,:)
655	ELSEIF ( ibc_q_t == 1 ) THEN
656	q_p(nzt+1,:,:) = q_p(nzt,:,:) + bc_q_t_val * dzu(nzt+1)
657	ENDIF
658
659	IF ( bulk_cloud_model .AND. microphysics_morrison ) THEN
660	!
661	!-- Surface conditions cloud water (Dirichlet)
662	!-- Run loop over all non-natural and natural walls. Note, in wall-datatype
663	!-- the k coordinate belongs to the atmospheric grid point, therefore, set
664	!-- qr_p and nr_p at k-1
665	!$OMP PARALLEL DO PRIVATE( i, j, k )
666	DO m = 1, bc_h(0)%ns
667	i = bc_h(0)%i(m)
668	j = bc_h(0)%j(m)
669	k = bc_h(0)%k(m)
670	qc_p(k-1,j,i) = 0.0_wp
671	nc_p(k-1,j,i) = 0.0_wp
672	ENDDO
673	!
674	!-- Top boundary condition for cloud water (Dirichlet)
675	qc_p(nzt+1,:,:) = 0.0_wp
676	nc_p(nzt+1,:,:) = 0.0_wp
677
678	ENDIF
679
680	IF ( bulk_cloud_model .AND. microphysics_seifert ) THEN
681	!
682	!-- Surface conditions rain water (Dirichlet)
683	!-- Run loop over all non-natural and natural walls. Note, in wall-datatype
684	!-- the k coordinate belongs to the atmospheric grid point, therefore, set
685	!-- qr_p and nr_p at k-1
686	!$OMP PARALLEL DO PRIVATE( i, j, k )
687	DO m = 1, bc_h(0)%ns
688	i = bc_h(0)%i(m)
689	j = bc_h(0)%j(m)
690	k = bc_h(0)%k(m)
691	qr_p(k-1,j,i) = 0.0_wp
692	nr_p(k-1,j,i) = 0.0_wp
693	ENDDO
694	!
695	!-- Top boundary condition for rain water (Dirichlet)
696	qr_p(nzt+1,:,:) = 0.0_wp
697	nr_p(nzt+1,:,:) = 0.0_wp
698
699	ENDIF
700	ENDIF
701	!
702	!-- Boundary conditions for scalar,
703	!-- bottom and top boundary (see also temperature)
704	IF ( passive_scalar ) THEN
705	!
706	!-- Surface conditions for constant_humidity_flux
707	!-- Run loop over all non-natural and natural walls. Note, in wall-datatype
708	!-- the k coordinate belongs to the atmospheric grid point, therefore, set
709	!-- s_p at k-1
710	IF ( ibc_s_b == 0 ) THEN
711
712	DO l = 0, 1
713	!
714	!-- Set kb, for upward-facing surfaces value at topography top (k-1) is set,
715	!-- for downward-facing surfaces at topography bottom (k+1).
716	kb = MERGE( -1, 1, l == 0 )
717	!$OMP PARALLEL DO PRIVATE( i, j, k )
718	DO m = 1, bc_h(l)%ns
719	i = bc_h(l)%i(m)
720	j = bc_h(l)%j(m)
721	k = bc_h(l)%k(m)
722	s_p(k+kb,j,i) = s(k+kb,j,i)
723	ENDDO
724	ENDDO
725
726	ELSE
727
728	DO l = 0, 1
729	!
730	!-- Set kb, for upward-facing surfaces value at topography top (k-1) is set,
731	!-- for downward-facing surfaces at topography bottom (k+1).
732	kb = MERGE( -1, 1, l == 0 )
733	!$OMP PARALLEL DO PRIVATE( i, j, k )
734	DO m = 1, bc_h(l)%ns
735	i = bc_h(l)%i(m)
736	j = bc_h(l)%j(m)
737	k = bc_h(l)%k(m)
738	s_p(k+kb,j,i) = s_p(k,j,i)
739	ENDDO
740	ENDDO
741	ENDIF
742	!
743	!-- Top boundary condition
744	IF ( ibc_s_t == 0 ) THEN
745	s_p(nzt+1,:,:) = s(nzt+1,:,:)
746	ELSEIF ( ibc_s_t == 1 ) THEN
747	s_p(nzt+1,:,:) = s_p(nzt,:,:)
748	ELSEIF ( ibc_s_t == 2 ) THEN
749	s_p(nzt+1,:,:) = s_p(nzt,:,:) + bc_s_t_val * dzu(nzt+1)
750	ENDIF
751
752	ENDIF
753	!
754	!-- Top/bottom boundary conditions for chemical species
755	IF ( air_chemistry ) CALL chem_boundary_conds( 'set_bc_bottomtop' )
756	!
757	!-- In case of inflow or nest boundary at the south boundary the boundary for v
758	!-- is at nys and in case of inflow or nest boundary at the left boundary the
759	!-- boundary for u is at nxl. Since in prognostic_equations (cache optimized
760	!-- version) these levels are handled as a prognostic level, boundary values
761	!-- have to be restored here.
762	!-- For the SGS-TKE, Neumann boundary conditions are used at the inflow.
763	IF ( bc_dirichlet_s ) THEN
764	v_p(:,nys,:) = v_p(:,nys-1,:)
765	IF ( .NOT. constant_diffusion ) e_p(:,nys-1,:) = e_p(:,nys,:)
766	ELSEIF ( bc_dirichlet_n ) THEN
767	IF ( .NOT. constant_diffusion ) e_p(:,nyn+1,:) = e_p(:,nyn,:)
768	ELSEIF ( bc_dirichlet_l ) THEN
769	u_p(:,:,nxl) = u_p(:,:,nxl-1)
770	IF ( .NOT. constant_diffusion ) e_p(:,:,nxl-1) = e_p(:,:,nxl)
771	ELSEIF ( bc_dirichlet_r ) THEN
772	IF ( .NOT. constant_diffusion ) e_p(:,:,nxr+1) = e_p(:,:,nxr)
773	ENDIF
774
775	!
776	!-- The same restoration for u at i=nxl and v at j=nys as above must be made
777	!-- in case of nest boundaries. This must not be done in case of vertical nesting
778	!-- mode as in that case the lateral boundaries are actually cyclic.
779	IF ( nesting_mode /= 'vertical' .OR. nesting_offline ) THEN
780	IF ( bc_dirichlet_s ) THEN
781	v_p(:,nys,:) = v_p(:,nys-1,:)
782	ENDIF
783	IF ( bc_dirichlet_l ) THEN
784	u_p(:,:,nxl) = u_p(:,:,nxl-1)
785	ENDIF
786	ENDIF
787
788	!
789	!-- Lateral boundary conditions for scalar quantities at the outflow
790	IF ( bc_radiation_s ) THEN
791	pt_p(:,nys-1,:) = pt_p(:,nys,:)
792	IF ( .NOT. constant_diffusion ) e_p(:,nys-1,:) = e_p(:,nys,:)
793	IF ( rans_tke_e ) diss_p(:,nys-1,:) = diss_p(:,nys,:)
794	IF ( humidity ) THEN
795	q_p(:,nys-1,:) = q_p(:,nys,:)
796	IF ( bulk_cloud_model .AND. microphysics_morrison ) THEN
797	qc_p(:,nys-1,:) = qc_p(:,nys,:)
798	nc_p(:,nys-1,:) = nc_p(:,nys,:)
799	ENDIF
800	IF ( bulk_cloud_model .AND. microphysics_seifert ) THEN
801	qr_p(:,nys-1,:) = qr_p(:,nys,:)
802	nr_p(:,nys-1,:) = nr_p(:,nys,:)
803	ENDIF
804	ENDIF
805	IF ( passive_scalar ) s_p(:,nys-1,:) = s_p(:,nys,:)
806	ELSEIF ( bc_radiation_n ) THEN
807	pt_p(:,nyn+1,:) = pt_p(:,nyn,:)
808	IF ( .NOT. constant_diffusion ) e_p(:,nyn+1,:) = e_p(:,nyn,:)
809	IF ( rans_tke_e ) diss_p(:,nyn+1,:) = diss_p(:,nyn,:)
810	IF ( humidity ) THEN
811	q_p(:,nyn+1,:) = q_p(:,nyn,:)
812	IF ( bulk_cloud_model .AND. microphysics_morrison ) THEN
813	qc_p(:,nyn+1,:) = qc_p(:,nyn,:)
814	nc_p(:,nyn+1,:) = nc_p(:,nyn,:)
815	ENDIF
816	IF ( bulk_cloud_model .AND. microphysics_seifert ) THEN
817	qr_p(:,nyn+1,:) = qr_p(:,nyn,:)
818	nr_p(:,nyn+1,:) = nr_p(:,nyn,:)
819	ENDIF
820	ENDIF
821	IF ( passive_scalar ) s_p(:,nyn+1,:) = s_p(:,nyn,:)
822	ELSEIF ( bc_radiation_l ) THEN
823	pt_p(:,:,nxl-1) = pt_p(:,:,nxl)
824	IF ( .NOT. constant_diffusion ) e_p(:,:,nxl-1) = e_p(:,:,nxl)
825	IF ( rans_tke_e ) diss_p(:,:,nxl-1) = diss_p(:,:,nxl)
826	IF ( humidity ) THEN
827	q_p(:,:,nxl-1) = q_p(:,:,nxl)
828	IF ( bulk_cloud_model .AND. microphysics_morrison ) THEN
829	qc_p(:,:,nxl-1) = qc_p(:,:,nxl)
830	nc_p(:,:,nxl-1) = nc_p(:,:,nxl)
831	ENDIF
832	IF ( bulk_cloud_model .AND. microphysics_seifert ) THEN
833	qr_p(:,:,nxl-1) = qr_p(:,:,nxl)
834	nr_p(:,:,nxl-1) = nr_p(:,:,nxl)
835	ENDIF
836	ENDIF
837	IF ( passive_scalar ) s_p(:,:,nxl-1) = s_p(:,:,nxl)
838	ELSEIF ( bc_radiation_r ) THEN
839	pt_p(:,:,nxr+1) = pt_p(:,:,nxr)
840	IF ( .NOT. constant_diffusion ) e_p(:,:,nxr+1) = e_p(:,:,nxr)
841	IF ( rans_tke_e ) diss_p(:,:,nxr+1) = diss_p(:,:,nxr)
842	IF ( humidity ) THEN
843	q_p(:,:,nxr+1) = q_p(:,:,nxr)
844	IF ( bulk_cloud_model .AND. microphysics_morrison ) THEN
845	qc_p(:,:,nxr+1) = qc_p(:,:,nxr)
846	nc_p(:,:,nxr+1) = nc_p(:,:,nxr)
847	ENDIF
848	IF ( bulk_cloud_model .AND. microphysics_seifert ) THEN
849	qr_p(:,:,nxr+1) = qr_p(:,:,nxr)
850	nr_p(:,:,nxr+1) = nr_p(:,:,nxr)
851	ENDIF
852	ENDIF
853	IF ( passive_scalar ) s_p(:,:,nxr+1) = s_p(:,:,nxr)
854	ENDIF
855
856	!
857	!-- Lateral boundary conditions for chemical species
858	IF ( air_chemistry ) CALL chem_boundary_conds( 'set_bc_lateral' )
859
860	!
861	!-- Radiation boundary conditions for the velocities at the respective outflow.
862	!-- The phase velocity is either assumed to the maximum phase velocity that
863	!-- ensures numerical stability (CFL-condition) or calculated after
864	!-- Orlanski(1976) and averaged along the outflow boundary.
865	IF ( bc_radiation_s ) THEN
866
867	IF ( use_cmax ) THEN
868	u_p(:,-1,:) = u(:,0,:)
869	v_p(:,0,:) = v(:,1,:)
870	w_p(:,-1,:) = w(:,0,:)
871	ELSEIF ( .NOT. use_cmax ) THEN
872
873	c_max = dy / dt_3d
874
875	c_u_m_l = 0.0_wp
876	c_v_m_l = 0.0_wp
877	c_w_m_l = 0.0_wp
878
879	c_u_m = 0.0_wp
880	c_v_m = 0.0_wp
881	c_w_m = 0.0_wp
882
883	!
884	!-- Calculate the phase speeds for u, v, and w, first local and then
885	!-- average along the outflow boundary.
886	DO k = nzb+1, nzt+1
887	DO i = nxl, nxr
888
889	denom = u_m_s(k,0,i) - u_m_s(k,1,i)
890
891	IF ( denom /= 0.0_wp ) THEN
892	c_u(k,i) = -c_max * ( u(k,0,i) - u_m_s(k,0,i) ) / ( denom * tsc(2) )
893	IF ( c_u(k,i) < 0.0_wp ) THEN
894	c_u(k,i) = 0.0_wp
895	ELSEIF ( c_u(k,i) > c_max ) THEN
896	c_u(k,i) = c_max
897	ENDIF
898	ELSE
899	c_u(k,i) = c_max
900	ENDIF
901
902	denom = v_m_s(k,1,i) - v_m_s(k,2,i)
903
904	IF ( denom /= 0.0_wp ) THEN
905	c_v(k,i) = -c_max * ( v(k,1,i) - v_m_s(k,1,i) ) / ( denom * tsc(2) )
906	IF ( c_v(k,i) < 0.0_wp ) THEN
907	c_v(k,i) = 0.0_wp
908	ELSEIF ( c_v(k,i) > c_max ) THEN
909	c_v(k,i) = c_max
910	ENDIF
911	ELSE
912	c_v(k,i) = c_max
913	ENDIF
914
915	denom = w_m_s(k,0,i) - w_m_s(k,1,i)
916
917	IF ( denom /= 0.0_wp ) THEN
918	c_w(k,i) = -c_max * ( w(k,0,i) - w_m_s(k,0,i) ) / ( denom * tsc(2) )
919	IF ( c_w(k,i) < 0.0_wp ) THEN
920	c_w(k,i) = 0.0_wp
921	ELSEIF ( c_w(k,i) > c_max ) THEN
922	c_w(k,i) = c_max
923	ENDIF
924	ELSE
925	c_w(k,i) = c_max
926	ENDIF
927
928	c_u_m_l(k) = c_u_m_l(k) + c_u(k,i)
929	c_v_m_l(k) = c_v_m_l(k) + c_v(k,i)
930	c_w_m_l(k) = c_w_m_l(k) + c_w(k,i)
931
932	ENDDO
933	ENDDO
934
935	#if defined( __parallel )
936	IF ( collective_wait ) CALL MPI_BARRIER( comm1dx, ierr )
937	CALL MPI_ALLREDUCE( c_u_m_l(nzb+1), c_u_m(nzb+1), nzt-nzb, MPI_REAL, &
938	MPI_SUM, comm1dx, ierr )
939	IF ( collective_wait ) CALL MPI_BARRIER( comm1dx, ierr )
940	CALL MPI_ALLREDUCE( c_v_m_l(nzb+1), c_v_m(nzb+1), nzt-nzb, MPI_REAL, &
941	MPI_SUM, comm1dx, ierr )
942	IF ( collective_wait ) CALL MPI_BARRIER( comm1dx, ierr )
943	CALL MPI_ALLREDUCE( c_w_m_l(nzb+1), c_w_m(nzb+1), nzt-nzb, MPI_REAL, &
944	MPI_SUM, comm1dx, ierr )
945	#else
946	c_u_m = c_u_m_l
947	c_v_m = c_v_m_l
948	c_w_m = c_w_m_l
949	#endif
950
951	c_u_m = c_u_m / (nx+1)
952	c_v_m = c_v_m / (nx+1)
953	c_w_m = c_w_m / (nx+1)
954
955	!
956	!-- Save old timelevels for the next timestep
957	IF ( intermediate_timestep_count == 1 ) THEN
958	u_m_s(:,:,:) = u(:,0:1,:)
959	v_m_s(:,:,:) = v(:,1:2,:)
960	w_m_s(:,:,:) = w(:,0:1,:)
961	ENDIF
962
963	!
964	!-- Calculate the new velocities
965	DO k = nzb+1, nzt+1
966	DO i = nxlg, nxrg
967	u_p(k,-1,i) = u(k,-1,i) - dt_3d * tsc(2) * c_u_m(k) * &
968	( u(k,-1,i) - u(k,0,i) ) * ddy
969
970	v_p(k,0,i) = v(k,0,i) - dt_3d * tsc(2) * c_v_m(k) * &
971	( v(k,0,i) - v(k,1,i) ) * ddy
972
973	w_p(k,-1,i) = w(k,-1,i) - dt_3d * tsc(2) * c_w_m(k) * &
974	( w(k,-1,i) - w(k,0,i) ) * ddy
975	ENDDO
976	ENDDO
977
978	!
979	!-- Bottom boundary at the outflow
980	IF ( ibc_uv_b == 0 ) THEN
981	u_p(nzb,-1,:) = 0.0_wp
982	v_p(nzb,0,:) = 0.0_wp
983	ELSE
984	u_p(nzb,-1,:) = u_p(nzb+1,-1,:)
985	v_p(nzb,0,:) = v_p(nzb+1,0,:)
986	ENDIF
987	w_p(nzb,-1,:) = 0.0_wp
988
989	!
990	!-- Top boundary at the outflow
991	IF ( ibc_uv_t == 0 ) THEN
992	u_p(nzt+1,-1,:) = u_init(nzt+1)
993	v_p(nzt+1,0,:) = v_init(nzt+1)
994	ELSE
995	u_p(nzt+1,-1,:) = u_p(nzt,-1,:)
996	v_p(nzt+1,0,:) = v_p(nzt,0,:)
997	ENDIF
998	w_p(nzt:nzt+1,-1,:) = 0.0_wp
999
1000	ENDIF
1001
1002	ENDIF
1003
1004	IF ( bc_radiation_n ) THEN
1005
1006	IF ( use_cmax ) THEN
1007	u_p(:,ny+1,:) = u(:,ny,:)
1008	v_p(:,ny+1,:) = v(:,ny,:)
1009	w_p(:,ny+1,:) = w(:,ny,:)
1010	ELSEIF ( .NOT. use_cmax ) THEN
1011
1012	c_max = dy / dt_3d
1013
1014	c_u_m_l = 0.0_wp
1015	c_v_m_l = 0.0_wp
1016	c_w_m_l = 0.0_wp
1017
1018	c_u_m = 0.0_wp
1019	c_v_m = 0.0_wp
1020	c_w_m = 0.0_wp
1021
1022	!
1023	!-- Calculate the phase speeds for u, v, and w, first local and then
1024	!-- average along the outflow boundary.
1025	DO k = nzb+1, nzt+1
1026	DO i = nxl, nxr
1027
1028	denom = u_m_n(k,ny,i) - u_m_n(k,ny-1,i)
1029
1030	IF ( denom /= 0.0_wp ) THEN
1031	c_u(k,i) = -c_max * ( u(k,ny,i) - u_m_n(k,ny,i) ) / ( denom * tsc(2) )
1032	IF ( c_u(k,i) < 0.0_wp ) THEN
1033	c_u(k,i) = 0.0_wp
1034	ELSEIF ( c_u(k,i) > c_max ) THEN
1035	c_u(k,i) = c_max
1036	ENDIF
1037	ELSE
1038	c_u(k,i) = c_max
1039	ENDIF
1040
1041	denom = v_m_n(k,ny,i) - v_m_n(k,ny-1,i)
1042
1043	IF ( denom /= 0.0_wp ) THEN
1044	c_v(k,i) = -c_max * ( v(k,ny,i) - v_m_n(k,ny,i) ) / ( denom * tsc(2) )
1045	IF ( c_v(k,i) < 0.0_wp ) THEN
1046	c_v(k,i) = 0.0_wp
1047	ELSEIF ( c_v(k,i) > c_max ) THEN
1048	c_v(k,i) = c_max
1049	ENDIF
1050	ELSE
1051	c_v(k,i) = c_max
1052	ENDIF
1053
1054	denom = w_m_n(k,ny,i) - w_m_n(k,ny-1,i)
1055
1056	IF ( denom /= 0.0_wp ) THEN
1057	c_w(k,i) = -c_max * ( w(k,ny,i) - w_m_n(k,ny,i) ) / ( denom * tsc(2) )
1058	IF ( c_w(k,i) < 0.0_wp ) THEN
1059	c_w(k,i) = 0.0_wp
1060	ELSEIF ( c_w(k,i) > c_max ) THEN
1061	c_w(k,i) = c_max
1062	ENDIF
1063	ELSE
1064	c_w(k,i) = c_max
1065	ENDIF
1066
1067	c_u_m_l(k) = c_u_m_l(k) + c_u(k,i)
1068	c_v_m_l(k) = c_v_m_l(k) + c_v(k,i)
1069	c_w_m_l(k) = c_w_m_l(k) + c_w(k,i)
1070
1071	ENDDO
1072	ENDDO
1073
1074	#if defined( __parallel )
1075	IF ( collective_wait ) CALL MPI_BARRIER( comm1dx, ierr )
1076	CALL MPI_ALLREDUCE( c_u_m_l(nzb+1), c_u_m(nzb+1), nzt-nzb, MPI_REAL, &
1077	MPI_SUM, comm1dx, ierr )
1078	IF ( collective_wait ) CALL MPI_BARRIER( comm1dx, ierr )
1079	CALL MPI_ALLREDUCE( c_v_m_l(nzb+1), c_v_m(nzb+1), nzt-nzb, MPI_REAL, &
1080	MPI_SUM, comm1dx, ierr )
1081	IF ( collective_wait ) CALL MPI_BARRIER( comm1dx, ierr )
1082	CALL MPI_ALLREDUCE( c_w_m_l(nzb+1), c_w_m(nzb+1), nzt-nzb, MPI_REAL, &
1083	MPI_SUM, comm1dx, ierr )
1084	#else
1085	c_u_m = c_u_m_l
1086	c_v_m = c_v_m_l
1087	c_w_m = c_w_m_l
1088	#endif
1089
1090	c_u_m = c_u_m / (nx+1)
1091	c_v_m = c_v_m / (nx+1)
1092	c_w_m = c_w_m / (nx+1)
1093
1094	!
1095	!-- Save old timelevels for the next timestep
1096	IF ( intermediate_timestep_count == 1 ) THEN
1097	u_m_n(:,:,:) = u(:,ny-1:ny,:)
1098	v_m_n(:,:,:) = v(:,ny-1:ny,:)
1099	w_m_n(:,:,:) = w(:,ny-1:ny,:)
1100	ENDIF
1101
1102	!
1103	!-- Calculate the new velocities
1104	DO k = nzb+1, nzt+1
1105	DO i = nxlg, nxrg
1106	u_p(k,ny+1,i) = u(k,ny+1,i) - dt_3d * tsc(2) * c_u_m(k) * &
1107	( u(k,ny+1,i) - u(k,ny,i) ) * ddy
1108
1109	v_p(k,ny+1,i) = v(k,ny+1,i) - dt_3d * tsc(2) * c_v_m(k) * &
1110	( v(k,ny+1,i) - v(k,ny,i) ) * ddy
1111
1112	w_p(k,ny+1,i) = w(k,ny+1,i) - dt_3d * tsc(2) * c_w_m(k) * &
1113	( w(k,ny+1,i) - w(k,ny,i) ) * ddy
1114	ENDDO
1115	ENDDO
1116
1117	!
1118	!-- Bottom boundary at the outflow
1119	IF ( ibc_uv_b == 0 ) THEN
1120	u_p(nzb,ny+1,:) = 0.0_wp
1121	v_p(nzb,ny+1,:) = 0.0_wp
1122	ELSE
1123	u_p(nzb,ny+1,:) = u_p(nzb+1,ny+1,:)
1124	v_p(nzb,ny+1,:) = v_p(nzb+1,ny+1,:)
1125	ENDIF
1126	w_p(nzb,ny+1,:) = 0.0_wp
1127
1128	!
1129	!-- Top boundary at the outflow
1130	IF ( ibc_uv_t == 0 ) THEN
1131	u_p(nzt+1,ny+1,:) = u_init(nzt+1)
1132	v_p(nzt+1,ny+1,:) = v_init(nzt+1)
1133	ELSE
1134	u_p(nzt+1,ny+1,:) = u_p(nzt,nyn+1,:)
1135	v_p(nzt+1,ny+1,:) = v_p(nzt,nyn+1,:)
1136	ENDIF
1137	w_p(nzt:nzt+1,ny+1,:) = 0.0_wp
1138
1139	ENDIF
1140
1141	ENDIF
1142
1143	IF ( bc_radiation_l ) THEN
1144
1145	IF ( use_cmax ) THEN
1146	u_p(:,:,0) = u(:,:,1)
1147	v_p(:,:,-1) = v(:,:,0)
1148	w_p(:,:,-1) = w(:,:,0)
1149	ELSEIF ( .NOT. use_cmax ) THEN
1150
1151	c_max = dx / dt_3d
1152
1153	c_u_m_l = 0.0_wp
1154	c_v_m_l = 0.0_wp
1155	c_w_m_l = 0.0_wp
1156
1157	c_u_m = 0.0_wp
1158	c_v_m = 0.0_wp
1159	c_w_m = 0.0_wp
1160
1161	!
1162	!-- Calculate the phase speeds for u, v, and w, first local and then
1163	!-- average along the outflow boundary.
1164	DO k = nzb+1, nzt+1
1165	DO j = nys, nyn
1166
1167	denom = u_m_l(k,j,1) - u_m_l(k,j,2)
1168
1169	IF ( denom /= 0.0_wp ) THEN
1170	c_u(k,j) = -c_max * ( u(k,j,1) - u_m_l(k,j,1) ) / ( denom * tsc(2) )
1171	IF ( c_u(k,j) < 0.0_wp ) THEN
1172	c_u(k,j) = 0.0_wp
1173	ELSEIF ( c_u(k,j) > c_max ) THEN
1174	c_u(k,j) = c_max
1175	ENDIF
1176	ELSE
1177	c_u(k,j) = c_max
1178	ENDIF
1179
1180	denom = v_m_l(k,j,0) - v_m_l(k,j,1)
1181
1182	IF ( denom /= 0.0_wp ) THEN
1183	c_v(k,j) = -c_max * ( v(k,j,0) - v_m_l(k,j,0) ) / ( denom * tsc(2) )
1184	IF ( c_v(k,j) < 0.0_wp ) THEN
1185	c_v(k,j) = 0.0_wp
1186	ELSEIF ( c_v(k,j) > c_max ) THEN
1187	c_v(k,j) = c_max
1188	ENDIF
1189	ELSE
1190	c_v(k,j) = c_max
1191	ENDIF
1192
1193	denom = w_m_l(k,j,0) - w_m_l(k,j,1)
1194
1195	IF ( denom /= 0.0_wp ) THEN
1196	c_w(k,j) = -c_max * ( w(k,j,0) - w_m_l(k,j,0) ) / ( denom * tsc(2) )
1197	IF ( c_w(k,j) < 0.0_wp ) THEN
1198	c_w(k,j) = 0.0_wp
1199	ELSEIF ( c_w(k,j) > c_max ) THEN
1200	c_w(k,j) = c_max
1201	ENDIF
1202	ELSE
1203	c_w(k,j) = c_max
1204	ENDIF
1205
1206	c_u_m_l(k) = c_u_m_l(k) + c_u(k,j)
1207	c_v_m_l(k) = c_v_m_l(k) + c_v(k,j)
1208	c_w_m_l(k) = c_w_m_l(k) + c_w(k,j)
1209
1210	ENDDO
1211	ENDDO
1212
1213	#if defined( __parallel )
1214	IF ( collective_wait ) CALL MPI_BARRIER( comm1dy, ierr )
1215	CALL MPI_ALLREDUCE( c_u_m_l(nzb+1), c_u_m(nzb+1), nzt-nzb, MPI_REAL, &
1216	MPI_SUM, comm1dy, ierr )
1217	IF ( collective_wait ) CALL MPI_BARRIER( comm1dy, ierr )
1218	CALL MPI_ALLREDUCE( c_v_m_l(nzb+1), c_v_m(nzb+1), nzt-nzb, MPI_REAL, &
1219	MPI_SUM, comm1dy, ierr )
1220	IF ( collective_wait ) CALL MPI_BARRIER( comm1dy, ierr )
1221	CALL MPI_ALLREDUCE( c_w_m_l(nzb+1), c_w_m(nzb+1), nzt-nzb, MPI_REAL, &
1222	MPI_SUM, comm1dy, ierr )
1223	#else
1224	c_u_m = c_u_m_l
1225	c_v_m = c_v_m_l
1226	c_w_m = c_w_m_l
1227	#endif
1228
1229	c_u_m = c_u_m / (ny+1)
1230	c_v_m = c_v_m / (ny+1)
1231	c_w_m = c_w_m / (ny+1)
1232
1233	!
1234	!-- Save old timelevels for the next timestep
1235	IF ( intermediate_timestep_count == 1 ) THEN
1236	u_m_l(:,:,:) = u(:,:,1:2)
1237	v_m_l(:,:,:) = v(:,:,0:1)
1238	w_m_l(:,:,:) = w(:,:,0:1)
1239	ENDIF
1240
1241	!
1242	!-- Calculate the new velocities
1243	DO k = nzb+1, nzt+1
1244	DO j = nysg, nyng
1245	u_p(k,j,0) = u(k,j,0) - dt_3d * tsc(2) * c_u_m(k) * &
1246	( u(k,j,0) - u(k,j,1) ) * ddx
1247
1248	v_p(k,j,-1) = v(k,j,-1) - dt_3d * tsc(2) * c_v_m(k) * &
1249	( v(k,j,-1) - v(k,j,0) ) * ddx
1250
1251	w_p(k,j,-1) = w(k,j,-1) - dt_3d * tsc(2) * c_w_m(k) * &
1252	( w(k,j,-1) - w(k,j,0) ) * ddx
1253	ENDDO
1254	ENDDO
1255
1256	!
1257	!-- Bottom boundary at the outflow
1258	IF ( ibc_uv_b == 0 ) THEN
1259	u_p(nzb,:,0) = 0.0_wp
1260	v_p(nzb,:,-1) = 0.0_wp
1261	ELSE
1262	u_p(nzb,:,0) = u_p(nzb+1,:,0)
1263	v_p(nzb,:,-1) = v_p(nzb+1,:,-1)
1264	ENDIF
1265	w_p(nzb,:,-1) = 0.0_wp
1266
1267	!
1268	!-- Top boundary at the outflow
1269	IF ( ibc_uv_t == 0 ) THEN
1270	u_p(nzt+1,:,0) = u_init(nzt+1)
1271	v_p(nzt+1,:,-1) = v_init(nzt+1)
1272	ELSE
1273	u_p(nzt+1,:,0) = u_p(nzt,:,0)
1274	v_p(nzt+1,:,-1) = v_p(nzt,:,-1)
1275	ENDIF
1276	w_p(nzt:nzt+1,:,-1) = 0.0_wp
1277
1278	ENDIF
1279
1280	ENDIF
1281
1282	IF ( bc_radiation_r ) THEN
1283
1284	IF ( use_cmax ) THEN
1285	u_p(:,:,nx+1) = u(:,:,nx)
1286	v_p(:,:,nx+1) = v(:,:,nx)
1287	w_p(:,:,nx+1) = w(:,:,nx)
1288	ELSEIF ( .NOT. use_cmax ) THEN
1289
1290	c_max = dx / dt_3d
1291
1292	c_u_m_l = 0.0_wp
1293	c_v_m_l = 0.0_wp
1294	c_w_m_l = 0.0_wp
1295
1296	c_u_m = 0.0_wp
1297	c_v_m = 0.0_wp
1298	c_w_m = 0.0_wp
1299
1300	!
1301	!-- Calculate the phase speeds for u, v, and w, first local and then
1302	!-- average along the outflow boundary.
1303	DO k = nzb+1, nzt+1
1304	DO j = nys, nyn
1305
1306	denom = u_m_r(k,j,nx) - u_m_r(k,j,nx-1)
1307
1308	IF ( denom /= 0.0_wp ) THEN
1309	c_u(k,j) = -c_max * ( u(k,j,nx) - u_m_r(k,j,nx) ) / ( denom * tsc(2) )
1310	IF ( c_u(k,j) < 0.0_wp ) THEN
1311	c_u(k,j) = 0.0_wp
1312	ELSEIF ( c_u(k,j) > c_max ) THEN
1313	c_u(k,j) = c_max
1314	ENDIF
1315	ELSE
1316	c_u(k,j) = c_max
1317	ENDIF
1318
1319	denom = v_m_r(k,j,nx) - v_m_r(k,j,nx-1)
1320
1321	IF ( denom /= 0.0_wp ) THEN
1322	c_v(k,j) = -c_max * ( v(k,j,nx) - v_m_r(k,j,nx) ) / ( denom * tsc(2) )
1323	IF ( c_v(k,j) < 0.0_wp ) THEN
1324	c_v(k,j) = 0.0_wp
1325	ELSEIF ( c_v(k,j) > c_max ) THEN
1326	c_v(k,j) = c_max
1327	ENDIF
1328	ELSE
1329	c_v(k,j) = c_max
1330	ENDIF
1331
1332	denom = w_m_r(k,j,nx) - w_m_r(k,j,nx-1)
1333
1334	IF ( denom /= 0.0_wp ) THEN
1335	c_w(k,j) = -c_max * ( w(k,j,nx) - w_m_r(k,j,nx) ) / ( denom * tsc(2) )
1336	IF ( c_w(k,j) < 0.0_wp ) THEN
1337	c_w(k,j) = 0.0_wp
1338	ELSEIF ( c_w(k,j) > c_max ) THEN
1339	c_w(k,j) = c_max
1340	ENDIF
1341	ELSE
1342	c_w(k,j) = c_max
1343	ENDIF
1344
1345	c_u_m_l(k) = c_u_m_l(k) + c_u(k,j)
1346	c_v_m_l(k) = c_v_m_l(k) + c_v(k,j)
1347	c_w_m_l(k) = c_w_m_l(k) + c_w(k,j)
1348
1349	ENDDO
1350	ENDDO
1351
1352	#if defined( __parallel )
1353	IF ( collective_wait ) CALL MPI_BARRIER( comm1dy, ierr )
1354	CALL MPI_ALLREDUCE( c_u_m_l(nzb+1), c_u_m(nzb+1), nzt-nzb, MPI_REAL, &
1355	MPI_SUM, comm1dy, ierr )
1356	IF ( collective_wait ) CALL MPI_BARRIER( comm1dy, ierr )
1357	CALL MPI_ALLREDUCE( c_v_m_l(nzb+1), c_v_m(nzb+1), nzt-nzb, MPI_REAL, &
1358	MPI_SUM, comm1dy, ierr )
1359	IF ( collective_wait ) CALL MPI_BARRIER( comm1dy, ierr )
1360	CALL MPI_ALLREDUCE( c_w_m_l(nzb+1), c_w_m(nzb+1), nzt-nzb, MPI_REAL, &
1361	MPI_SUM, comm1dy, ierr )
1362	#else
1363	c_u_m = c_u_m_l
1364	c_v_m = c_v_m_l
1365	c_w_m = c_w_m_l
1366	#endif
1367
1368	c_u_m = c_u_m / (ny+1)
1369	c_v_m = c_v_m / (ny+1)
1370	c_w_m = c_w_m / (ny+1)
1371
1372	!
1373	!-- Save old timelevels for the next timestep
1374	IF ( intermediate_timestep_count == 1 ) THEN
1375	u_m_r(:,:,:) = u(:,:,nx-1:nx)
1376	v_m_r(:,:,:) = v(:,:,nx-1:nx)
1377	w_m_r(:,:,:) = w(:,:,nx-1:nx)
1378	ENDIF
1379
1380	!
1381	!-- Calculate the new velocities
1382	DO k = nzb+1, nzt+1
1383	DO j = nysg, nyng
1384	u_p(k,j,nx+1) = u(k,j,nx+1) - dt_3d * tsc(2) * c_u_m(k) * &
1385	( u(k,j,nx+1) - u(k,j,nx) ) * ddx
1386
1387	v_p(k,j,nx+1) = v(k,j,nx+1) - dt_3d * tsc(2) * c_v_m(k) * &
1388	( v(k,j,nx+1) - v(k,j,nx) ) * ddx
1389
1390	w_p(k,j,nx+1) = w(k,j,nx+1) - dt_3d * tsc(2) * c_w_m(k) * &
1391	( w(k,j,nx+1) - w(k,j,nx) ) * ddx
1392	ENDDO
1393	ENDDO
1394
1395	!
1396	!-- Bottom boundary at the outflow
1397	IF ( ibc_uv_b == 0 ) THEN
1398	u_p(nzb,:,nx+1) = 0.0_wp
1399	v_p(nzb,:,nx+1) = 0.0_wp
1400	ELSE
1401	u_p(nzb,:,nx+1) = u_p(nzb+1,:,nx+1)
1402	v_p(nzb,:,nx+1) = v_p(nzb+1,:,nx+1)
1403	ENDIF
1404	w_p(nzb,:,nx+1) = 0.0_wp
1405
1406	!
1407	!-- Top boundary at the outflow
1408	IF ( ibc_uv_t == 0 ) THEN
1409	u_p(nzt+1,:,nx+1) = u_init(nzt+1)
1410	v_p(nzt+1,:,nx+1) = v_init(nzt+1)
1411	ELSE
1412	u_p(nzt+1,:,nx+1) = u_p(nzt,:,nx+1)
1413	v_p(nzt+1,:,nx+1) = v_p(nzt,:,nx+1)
1414	ENDIF
1415	w_p(nzt:nzt+1,:,nx+1) = 0.0_wp
1416
1417	ENDIF
1418
1419	ENDIF
1420
1421	IF ( salsa ) THEN
1422	CALL salsa_boundary_conds
1423	ENDIF
1424
1425	END SUBROUTINE boundary_conds

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

Download in other formats:

| Impressum | ©Leibniz Universität Hannover |