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1	!> @file diffusion_e_mod.f90
2	!--------------------------------------------------------------------------------!
3	! This file is part of PALM.
4	!
5	! PALM is free software: you can redistribute it and/or modify it under the terms
6	! of the GNU General Public License as published by the Free Software Foundation,
7	! either version 3 of the License, or (at your option) any later version.
8	!
9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
12	!
13	! You should have received a copy of the GNU General Public License along with
14	! PALM. If not, see <http://www.gnu.org/licenses/>.
15	!
16	! Copyright 1997-2016 Leibniz Universitaet Hannover
17	!--------------------------------------------------------------------------------!
18	!
19	! Current revisions:
20	! -----------------
21	!
22	!
23	! Former revisions:
24	! -----------------
25	! $Id: diffusion_e_mod.f90 1851 2016-04-08 13:32:50Z maronga $
26	!
27	! 1850 2016-04-08 13:29:27Z maronga
28	! Module renamed
29	! Adapted for modularization of microphysics
30	!
31	! 1831 2016-04-07 13:15:51Z hoffmann
32	! turbulence renamed collision_turbulence
33	!
34	! 1682 2015-10-07 23:56:08Z knoop
35	! Code annotations made doxygen readable
36	!
37	! 1374 2014-04-25 12:55:07Z raasch
38	! missing variables added to ONLY list
39	! rif removed from acc-present-list
40	!
41	! 1340 2014-03-25 19:45:13Z kanani
42	! REAL constants defined as wp-kind
43	!
44	! 1320 2014-03-20 08:40:49Z raasch
45	! ONLY-attribute added to USE-statements,
46	! kind-parameters added to all INTEGER and REAL declaration statements,
47	! kinds are defined in new module kinds,
48	! revision history before 2012 removed,
49	! comment fields (!:) to be used for variable explanations added to
50	! all variable declaration statements
51	!
52	! 1257 2013-11-08 15:18:40Z raasch
53	! openacc loop and loop vector clauses removed
54	!
55	! 1179 2013-06-14 05:57:58Z raasch
56	! use_reference renamed use_single_reference_value
57	!
58	! 1171 2013-05-30 11:27:45Z raasch
59	! use_reference-case activated in accelerator version
60	!
61	! 1128 2013-04-12 06:19:32Z raasch
62	! loop index bounds in accelerator version replaced by i_left, i_right, j_south,
63	! j_north
64	!
65	! 1065 2012-11-22 17:42:36Z hoffmann
66	! Enabled the claculation of diss in case of turbulence = .TRUE. (parameterized
67	! effects of turbulence on autoconversion and accretion in two-moments cloud
68	! physics scheme).
69	!
70	! 1036 2012-10-22 13:43:42Z raasch
71	! code put under GPL (PALM 3.9)
72	!
73	! 1015 2012-09-27 09:23:24Z raasch
74	! accelerator version (*_acc) added,
75	! adjustment of mixing length to the Prandtl mixing length at first grid point
76	! above ground removed
77	!
78	! 1010 2012-09-20 07:59:54Z raasch
79	! cpp switch __nopointer added for pointer free version
80	!
81	! 1001 2012-09-13 14:08:46Z raasch
82	! most arrays comunicated by module instead of parameter list
83	!
84	! 825 2012-02-19 03:03:44Z raasch
85	! wang_collision_kernel renamed wang_kernel
86	!
87	! Revision 1.1 1997/09/19 07:40:24 raasch
88	! Initial revision
89	!
90	!
91	! Description:
92	! ------------
93	!> Diffusion- and dissipation terms for the TKE
94	!------------------------------------------------------------------------------!
95	MODULE diffusion_e_mod
96
97
98	PRIVATE
99	PUBLIC diffusion_e, diffusion_e_acc
100
101
102	INTERFACE diffusion_e
103	MODULE PROCEDURE diffusion_e
104	MODULE PROCEDURE diffusion_e_ij
105	END INTERFACE diffusion_e
106
107	INTERFACE diffusion_e_acc
108	MODULE PROCEDURE diffusion_e_acc
109	END INTERFACE diffusion_e_acc
110
111	CONTAINS
112
113
114	!------------------------------------------------------------------------------!
115	! Description:
116	! ------------
117	!> Call for all grid points
118	!------------------------------------------------------------------------------!
119	SUBROUTINE diffusion_e( var, var_reference )
120
121	USE arrays_3d, &
122	ONLY: dd2zu, ddzu, ddzw, diss, e, km, l_grid, tend, zu, zw
123
124	USE control_parameters, &
125	ONLY: atmos_ocean_sign, g, use_single_reference_value, &
126	wall_adjustment, wall_adjustment_factor
127
128	USE grid_variables, &
129	ONLY: ddx2, ddy2
130
131	USE indices, &
132	ONLY: nxl, nxlg, nxr, nxrg, nyn, nyng, nys, nysg, nzb, nzb_s_inner,&
133	nzt
134
135	USE kinds
136
137	USE microphysics_mod, &
138	ONLY: collision_turbulence
139
140	USE particle_attributes, &
141	ONLY: use_sgs_for_particles, wang_kernel
142
143	IMPLICIT NONE
144
145	INTEGER(iwp) :: i !<
146	INTEGER(iwp) :: j !<
147	INTEGER(iwp) :: k !<
148	REAL(wp) :: dvar_dz !<
149	REAL(wp) :: l_stable !<
150	REAL(wp) :: var_reference !<
151
152	#if defined( __nopointer )
153	REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: var !<
154	#else
155	REAL(wp), DIMENSION(:,:,:), POINTER :: var !<
156	#endif
157	REAL(wp), DIMENSION(nzb+1:nzt,nys:nyn) :: dissipation !<
158	REAL(wp), DIMENSION(nzb+1:nzt,nys:nyn) :: l !<
159	REAL(wp), DIMENSION(nzb+1:nzt,nys:nyn) :: ll !<
160
161
162	!
163	!-- This if clause must be outside the k-loop because otherwise
164	!-- runtime errors occur with -C hopt on NEC
165	IF ( use_single_reference_value ) THEN
166
167	DO i = nxl, nxr
168	DO j = nys, nyn
169	DO k = nzb_s_inner(j,i)+1, nzt
170	!
171	!-- Calculate the mixing length (for dissipation)
172	dvar_dz = atmos_ocean_sign * &
173	( var(k+1,j,i) - var(k-1,j,i) ) * dd2zu(k)
174	IF ( dvar_dz > 0.0_wp ) THEN
175	l_stable = 0.76_wp * SQRT( e(k,j,i) ) / &
176	SQRT( g / var_reference * dvar_dz ) + 1E-5_wp
177	ELSE
178	l_stable = l_grid(k)
179	ENDIF
180	!
181	!-- Adjustment of the mixing length
182	IF ( wall_adjustment ) THEN
183	l(k,j) = MIN( wall_adjustment_factor * &
184	( zu(k) - zw(nzb_s_inner(j,i)) ), &
185	l_grid(k), l_stable )
186	ll(k,j) = MIN( wall_adjustment_factor * &
187	( zu(k) - zw(nzb_s_inner(j,i)) ), &
188	l_grid(k) )
189	ELSE
190	l(k,j) = MIN( l_grid(k), l_stable )
191	ll(k,j) = l_grid(k)
192	ENDIF
193
194	ENDDO
195	ENDDO
196
197	!
198	!-- Calculate the tendency terms
199	DO j = nys, nyn
200	DO k = nzb_s_inner(j,i)+1, nzt
201
202	dissipation(k,j) = ( 0.19_wp + 0.74_wp * l(k,j) / ll(k,j) ) * &
203	e(k,j,i) * SQRT( e(k,j,i) ) / l(k,j)
204
205	tend(k,j,i) = tend(k,j,i) &
206	+ ( &
207	( km(k,j,i)+km(k,j,i+1) ) * ( e(k,j,i+1)-e(k,j,i) ) &
208	- ( km(k,j,i)+km(k,j,i-1) ) * ( e(k,j,i)-e(k,j,i-1) ) &
209	) * ddx2 &
210	+ ( &
211	( km(k,j,i)+km(k,j+1,i) ) * ( e(k,j+1,i)-e(k,j,i) ) &
212	- ( km(k,j,i)+km(k,j-1,i) ) * ( e(k,j,i)-e(k,j-1,i) ) &
213	) * ddy2 &
214	+ ( &
215	( km(k,j,i)+km(k+1,j,i) ) * ( e(k+1,j,i)-e(k,j,i) ) * ddzu(k+1) &
216	- ( km(k,j,i)+km(k-1,j,i) ) * ( e(k,j,i)-e(k-1,j,i) ) * ddzu(k) &
217	) * ddzw(k) &
218	- dissipation(k,j)
219
220	ENDDO
221	ENDDO
222
223	!
224	!-- Store dissipation if needed for calculating the sgs particle
225	!-- velocities
226	IF ( use_sgs_for_particles .OR. wang_kernel .OR. &
227	collision_turbulence ) THEN
228	DO j = nys, nyn
229	DO k = nzb_s_inner(j,i)+1, nzt
230	diss(k,j,i) = dissipation(k,j)
231	ENDDO
232	ENDDO
233	ENDIF
234
235	ENDDO
236
237	ELSE
238
239	DO i = nxl, nxr
240	DO j = nys, nyn
241	DO k = nzb_s_inner(j,i)+1, nzt
242	!
243	!-- Calculate the mixing length (for dissipation)
244	dvar_dz = atmos_ocean_sign * &
245	( var(k+1,j,i) - var(k-1,j,i) ) * dd2zu(k)
246	IF ( dvar_dz > 0.0_wp ) THEN
247	l_stable = 0.76_wp * SQRT( e(k,j,i) ) / &
248	SQRT( g / var(k,j,i) * dvar_dz ) + 1E-5_wp
249	ELSE
250	l_stable = l_grid(k)
251	ENDIF
252	!
253	!-- Adjustment of the mixing length
254	IF ( wall_adjustment ) THEN
255	l(k,j) = MIN( wall_adjustment_factor * &
256	( zu(k) - zw(nzb_s_inner(j,i)) ), &
257	l_grid(k), l_stable )
258	ll(k,j) = MIN( wall_adjustment_factor * &
259	( zu(k) - zw(nzb_s_inner(j,i)) ), &
260	l_grid(k) )
261	ELSE
262	l(k,j) = MIN( l_grid(k), l_stable )
263	ll(k,j) = l_grid(k)
264	ENDIF
265
266	ENDDO
267	ENDDO
268
269	!
270	!-- Calculate the tendency terms
271	DO j = nys, nyn
272	DO k = nzb_s_inner(j,i)+1, nzt
273
274	dissipation(k,j) = ( 0.19_wp + 0.74_wp * l(k,j) / ll(k,j) ) * &
275	e(k,j,i) * SQRT( e(k,j,i) ) / l(k,j)
276
277	tend(k,j,i) = tend(k,j,i) &
278	+ ( &
279	( km(k,j,i)+km(k,j,i+1) ) * ( e(k,j,i+1)-e(k,j,i) ) &
280	- ( km(k,j,i)+km(k,j,i-1) ) * ( e(k,j,i)-e(k,j,i-1) ) &
281	) * ddx2 &
282	+ ( &
283	( km(k,j,i)+km(k,j+1,i) ) * ( e(k,j+1,i)-e(k,j,i) ) &
284	- ( km(k,j,i)+km(k,j-1,i) ) * ( e(k,j,i)-e(k,j-1,i) ) &
285	) * ddy2 &
286	+ ( &
287	( km(k,j,i)+km(k+1,j,i) ) * ( e(k+1,j,i)-e(k,j,i) ) * ddzu(k+1) &
288	- ( km(k,j,i)+km(k-1,j,i) ) * ( e(k,j,i)-e(k-1,j,i) ) * ddzu(k) &
289	) * ddzw(k) &
290	- dissipation(k,j)
291
292	ENDDO
293	ENDDO
294
295	!
296	!-- Store dissipation if needed for calculating the sgs particle
297	!-- velocities
298	IF ( use_sgs_for_particles .OR. wang_kernel .OR. &
299	collision_turbulence ) THEN
300	DO j = nys, nyn
301	DO k = nzb_s_inner(j,i)+1, nzt
302	diss(k,j,i) = dissipation(k,j)
303	ENDDO
304	ENDDO
305	ENDIF
306
307	ENDDO
308
309	ENDIF
310
311	!
312	!-- Boundary condition for dissipation
313	IF ( use_sgs_for_particles .OR. wang_kernel .OR. &
314	collision_turbulence ) THEN
315	DO i = nxl, nxr
316	DO j = nys, nyn
317	diss(nzb_s_inner(j,i),j,i) = diss(nzb_s_inner(j,i)+1,j,i)
318	ENDDO
319	ENDDO
320	ENDIF
321
322	END SUBROUTINE diffusion_e
323
324
325	!------------------------------------------------------------------------------!
326	! Description:
327	! ------------
328	!> Call for all grid points - accelerator version
329	!------------------------------------------------------------------------------!
330	SUBROUTINE diffusion_e_acc( var, var_reference )
331
332	USE arrays_3d, &
333	ONLY: dd2zu, ddzu, ddzw, diss, e, km, l_grid, tend, zu, zw
334
335	USE control_parameters, &
336	ONLY: atmos_ocean_sign, g, use_single_reference_value, &
337	wall_adjustment, wall_adjustment_factor
338
339	USE grid_variables, &
340	ONLY: ddx2, ddy2
341
342	USE indices, &
343	ONLY: i_left, i_right, j_north, j_south, nxlg, nxrg, nyng, nysg, &
344	nzb, nzb_s_inner, nzt
345
346	USE kinds
347
348	USE microphysics_mod, &
349	ONLY: collision_turbulence
350
351	USE particle_attributes, &
352	ONLY: use_sgs_for_particles, wang_kernel
353
354	IMPLICIT NONE
355
356	INTEGER(iwp) :: i !<
357	INTEGER(iwp) :: j !<
358	INTEGER(iwp) :: k !<
359	REAL(wp) :: dissipation !<
360	REAL(wp) :: dvar_dz !<
361	REAL(wp) :: l !<
362	REAL(wp) :: ll !<
363	REAL(wp) :: l_stable !<
364	REAL(wp) :: var_reference !<
365
366	#if defined( __nopointer )
367	REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: var !<
368	#else
369	REAL(wp), DIMENSION(:,:,:), POINTER :: var !<
370	#endif
371
372
373	!
374	!-- This if clause must be outside the k-loop because otherwise
375	!-- runtime errors occur with -C hopt on NEC
376	IF ( use_single_reference_value ) THEN
377
378	!$acc kernels present( ddzu, ddzw, dd2zu, diss, e, km, l_grid ) &
379	!$acc present( nzb_s_inner, tend, var, zu, zw )
380	DO i = i_left, i_right
381	DO j = j_south, j_north
382	DO k = 1, nzt
383
384	IF ( k > nzb_s_inner(j,i) ) THEN
385	!
386	!-- Calculate the mixing length (for dissipation)
387	dvar_dz = atmos_ocean_sign * &
388	( var(k+1,j,i) - var(k-1,j,i) ) * dd2zu(k)
389	IF ( dvar_dz > 0.0_wp ) THEN
390	l_stable = 0.76_wp * SQRT( e(k,j,i) ) / &
391	SQRT( g / var_reference * dvar_dz ) + 1E-5_wp
392	ELSE
393	l_stable = l_grid(k)
394	ENDIF
395	!
396	!-- Adjustment of the mixing length
397	IF ( wall_adjustment ) THEN
398	l = MIN( wall_adjustment_factor * &
399	( zu(k) - zw(nzb_s_inner(j,i)) ), &
400	l_grid(k), l_stable )
401	ll = MIN( wall_adjustment_factor * &
402	( zu(k) - zw(nzb_s_inner(j,i)) ), &
403	l_grid(k) )
404	ELSE
405	l = MIN( l_grid(k), l_stable )
406	ll = l_grid(k)
407	ENDIF
408	!
409	!-- Calculate the tendency terms
410	dissipation = ( 0.19_wp + 0.74_wp * l / ll ) * &
411	e(k,j,i) * SQRT( e(k,j,i) ) / l
412
413	tend(k,j,i) = tend(k,j,i) &
414	+ ( &
415	( km(k,j,i)+km(k,j,i+1) ) * ( e(k,j,i+1)-e(k,j,i) ) &
416	- ( km(k,j,i)+km(k,j,i-1) ) * ( e(k,j,i)-e(k,j,i-1) ) &
417	) * ddx2 &
418	+ ( &
419	( km(k,j,i)+km(k,j+1,i) ) * ( e(k,j+1,i)-e(k,j,i) ) &
420	- ( km(k,j,i)+km(k,j-1,i) ) * ( e(k,j,i)-e(k,j-1,i) ) &
421	) * ddy2 &
422	+ ( &
423	( km(k,j,i)+km(k+1,j,i) ) * ( e(k+1,j,i)-e(k,j,i) ) * ddzu(k+1) &
424	- ( km(k,j,i)+km(k-1,j,i) ) * ( e(k,j,i)-e(k-1,j,i) ) * ddzu(k) &
425	) * ddzw(k) &
426	- dissipation
427
428	!
429	!-- Store dissipation if needed for calculating the sgs particle
430	!-- velocities
431	IF ( use_sgs_for_particles .OR. wang_kernel .OR. &
432	collision_turbulence ) THEN
433	diss(k,j,i) = dissipation
434	ENDIF
435
436	ENDIF
437
438	ENDDO
439	ENDDO
440	ENDDO
441	!$acc end kernels
442
443	ELSE
444
445	!$acc kernels present( ddzu, ddzw, dd2zu, diss, e, km, l_grid ) &
446	!$acc present( nzb_s_inner, tend, var, zu, zw )
447	DO i = i_left, i_right
448	DO j = j_south, j_north
449	DO k = 1, nzt
450
451	IF ( k > nzb_s_inner(j,i) ) THEN
452	!
453	!-- Calculate the mixing length (for dissipation)
454	dvar_dz = atmos_ocean_sign * &
455	( var(k+1,j,i) - var(k-1,j,i) ) * dd2zu(k)
456	IF ( dvar_dz > 0.0_wp ) THEN
457	l_stable = 0.76_wp * SQRT( e(k,j,i) ) / &
458	SQRT( g / var(k,j,i) * dvar_dz ) + 1E-5_wp
459	ELSE
460	l_stable = l_grid(k)
461	ENDIF
462	!
463	!-- Adjustment of the mixing length
464	IF ( wall_adjustment ) THEN
465	l = MIN( wall_adjustment_factor * &
466	( zu(k) - zw(nzb_s_inner(j,i)) ), &
467	l_grid(k), l_stable )
468	ll = MIN( wall_adjustment_factor * &
469	( zu(k) - zw(nzb_s_inner(j,i)) ), &
470	l_grid(k) )
471	ELSE
472	l = MIN( l_grid(k), l_stable )
473	ll = l_grid(k)
474	ENDIF
475	!
476	!-- Calculate the tendency terms
477	dissipation = ( 0.19_wp + 0.74_wp * l / ll ) * &
478	e(k,j,i) * SQRT( e(k,j,i) ) / l
479
480	tend(k,j,i) = tend(k,j,i) &
481	+ ( &
482	( km(k,j,i)+km(k,j,i+1) ) * ( e(k,j,i+1)-e(k,j,i) ) &
483	- ( km(k,j,i)+km(k,j,i-1) ) * ( e(k,j,i)-e(k,j,i-1) ) &
484	) * ddx2 &
485	+ ( &
486	( km(k,j,i)+km(k,j+1,i) ) * ( e(k,j+1,i)-e(k,j,i) ) &
487	- ( km(k,j,i)+km(k,j-1,i) ) * ( e(k,j,i)-e(k,j-1,i) ) &
488	) * ddy2 &
489	+ ( &
490	( km(k,j,i)+km(k+1,j,i) ) * ( e(k+1,j,i)-e(k,j,i) ) * ddzu(k+1) &
491	- ( km(k,j,i)+km(k-1,j,i) ) * ( e(k,j,i)-e(k-1,j,i) ) * ddzu(k) &
492	) * ddzw(k) &
493	- dissipation
494
495	!
496	!-- Store dissipation if needed for calculating the sgs
497	!-- particle velocities
498	IF ( use_sgs_for_particles .OR. wang_kernel .OR. &
499	collision_turbulence ) THEN
500	diss(k,j,i) = dissipation
501	ENDIF
502
503	ENDIF
504
505	ENDDO
506	ENDDO
507	ENDDO
508	!$acc end kernels
509
510	ENDIF
511
512	!
513	!-- Boundary condition for dissipation
514	IF ( use_sgs_for_particles .OR. wang_kernel .OR. &
515	collision_turbulence ) THEN
516	!$acc kernels present( diss, nzb_s_inner )
517	DO i = i_left, i_right
518	DO j = j_south, j_north
519	diss(nzb_s_inner(j,i),j,i) = diss(nzb_s_inner(j,i)+1,j,i)
520	ENDDO
521	ENDDO
522	!$acc end kernels
523	ENDIF
524
525	END SUBROUTINE diffusion_e_acc
526
527
528	!------------------------------------------------------------------------------!
529	! Description:
530	! ------------
531	!> Call for grid point i,j
532	!------------------------------------------------------------------------------!
533	SUBROUTINE diffusion_e_ij( i, j, var, var_reference )
534
535	USE arrays_3d, &
536	ONLY: dd2zu, ddzu, ddzw, diss, e, km, l_grid, tend, zu, zw
537
538	USE control_parameters, &
539	ONLY: atmos_ocean_sign, g, use_single_reference_value, &
540	wall_adjustment, wall_adjustment_factor
541
542	USE grid_variables, &
543	ONLY: ddx2, ddy2
544
545	USE indices, &
546	ONLY: nxlg, nxrg, nyng, nysg, nzb, nzb_s_inner, nzt
547
548	USE kinds
549
550	USE microphysics_mod, &
551	ONLY: collision_turbulence
552
553	USE particle_attributes, &
554	ONLY: use_sgs_for_particles, wang_kernel
555
556	IMPLICIT NONE
557
558	INTEGER(iwp) :: i !<
559	INTEGER(iwp) :: j !<
560	INTEGER(iwp) :: k !<
561	REAL(wp) :: dvar_dz !<
562	REAL(wp) :: l_stable !<
563	REAL(wp) :: var_reference !<
564
565	#if defined( __nopointer )
566	REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: var !<
567	#else
568	REAL(wp), DIMENSION(:,:,:), POINTER :: var !<
569	#endif
570	REAL(wp), DIMENSION(nzb+1:nzt) :: dissipation !<
571	REAL(wp), DIMENSION(nzb+1:nzt) :: l !<
572	REAL(wp), DIMENSION(nzb+1:nzt) :: ll !<
573
574
575	!
576	!-- Calculate the mixing length (for dissipation)
577	DO k = nzb_s_inner(j,i)+1, nzt
578	dvar_dz = atmos_ocean_sign * &
579	( var(k+1,j,i) - var(k-1,j,i) ) * dd2zu(k)
580	IF ( dvar_dz > 0.0_wp ) THEN
581	IF ( use_single_reference_value ) THEN
582	l_stable = 0.76_wp * SQRT( e(k,j,i) ) / &
583	SQRT( g / var_reference * dvar_dz ) + 1E-5_wp
584	ELSE
585	l_stable = 0.76_wp * SQRT( e(k,j,i) ) / &
586	SQRT( g / var(k,j,i) * dvar_dz ) + 1E-5_wp
587	ENDIF
588	ELSE
589	l_stable = l_grid(k)
590	ENDIF
591	!
592	!-- Adjustment of the mixing length
593	IF ( wall_adjustment ) THEN
594	l(k) = MIN( wall_adjustment_factor * &
595	( zu(k) - zw(nzb_s_inner(j,i)) ), l_grid(k), &
596	l_stable )
597	ll(k) = MIN( wall_adjustment_factor * &
598	( zu(k) - zw(nzb_s_inner(j,i)) ), l_grid(k) )
599	ELSE
600	l(k) = MIN( l_grid(k), l_stable )
601	ll(k) = l_grid(k)
602	ENDIF
603	!
604	!-- Calculate the tendency term
605	dissipation(k) = ( 0.19_wp + 0.74_wp * l(k) / ll(k) ) * e(k,j,i) * &
606	SQRT( e(k,j,i) ) / l(k)
607
608	tend(k,j,i) = tend(k,j,i) &
609	+ ( &
610	( km(k,j,i)+km(k,j,i+1) ) * ( e(k,j,i+1)-e(k,j,i) ) &
611	- ( km(k,j,i)+km(k,j,i-1) ) * ( e(k,j,i)-e(k,j,i-1) ) &
612	) * ddx2 &
613	+ ( &
614	( km(k,j,i)+km(k,j+1,i) ) * ( e(k,j+1,i)-e(k,j,i) ) &
615	- ( km(k,j,i)+km(k,j-1,i) ) * ( e(k,j,i)-e(k,j-1,i) ) &
616	) * ddy2 &
617	+ ( &
618	( km(k,j,i)+km(k+1,j,i) ) * ( e(k+1,j,i)-e(k,j,i) ) * ddzu(k+1) &
619	- ( km(k,j,i)+km(k-1,j,i) ) * ( e(k,j,i)-e(k-1,j,i) ) * ddzu(k) &
620	) * ddzw(k) &
621	- dissipation(k)
622
623	ENDDO
624
625	!
626	!-- Store dissipation if needed for calculating the sgs particle velocities
627	IF ( use_sgs_for_particles .OR. wang_kernel .OR. &
628	collision_turbulence ) THEN
629	DO k = nzb_s_inner(j,i)+1, nzt
630	diss(k,j,i) = dissipation(k)
631	ENDDO
632	!
633	!-- Boundary condition for dissipation
634	diss(nzb_s_inner(j,i),j,i) = diss(nzb_s_inner(j,i)+1,j,i)
635	ENDIF
636
637	END SUBROUTINE diffusion_e_ij
638
639	END MODULE diffusion_e_mod

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source: palm/trunk/SOURCE/diffusion_e_mod.f90 @ 1857

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