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source: palm/trunk/SOURCE/time_integration.f90 @ 803

Last change on this file since 803 was 791, checked in by raasch, 13 years ago
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1	SUBROUTINE time_integration
2
3	!------------------------------------------------------------------------------!
4	! Current revisions:
5	! -----------------
6	!
7	!
8	! Former revisions:
9	! -----------------
10	! $Id: time_integration.f90 791 2011-11-29 03:33:42Z franke $
11	!
12	! 790 2011-11-29 03:11:20Z raasch
13	! exchange of ghostpoints for array diss
14	!
15	! 707 2011-03-29 11:39:40Z raasch
16	! bc_lr/ns replaced by bc_lr/ns_cyc, calls of exchange_horiz are modified,
17	! adaption to sloping surface
18	!
19	! 667 2010-12-23 12:06:00Z suehring/gryschka
20	! Calls of exchange_horiz are modified.
21	! Adaption to slooping surface.
22	!
23	! 449 2010-02-02 11:23:59Z raasch
24	! Bugfix: exchange of ghost points for prho included
25	!
26	! 410 2009-12-04 17:05:40Z letzel
27	! masked data output
28	!
29	! 388 2009-09-23 09:40:33Z raasch
30	! Using prho instead of rho in diffusvities.
31	! Coupling with independent precursor runs.
32	! Bugfix: output of particle time series only if particle advection is switched
33	! on
34	!
35	! 151 2008-03-07 13:42:18Z raasch
36	! inflow turbulence is imposed by calling new routine inflow_turbulence
37	!
38	! 108 2007-08-24 15:10:38Z letzel
39	! Call of new routine surface_coupler,
40	! presure solver is called after the first Runge-Kutta substep instead of the
41	! last in case that call_psolver_at_all_substeps = .F.; for this case, the
42	! random perturbation has to be added to the velocity fields also after the
43	! first substep
44	!
45	! 97 2007-06-21 08:23:15Z raasch
46	! diffusivities is called with argument rho in case of ocean runs,
47	! new argument pt_/prho_reference in calls of diffusivities,
48	! ghostpoint exchange for salinity and density
49	!
50	! 87 2007-05-22 15:46:47Z raasch
51	! var_hom renamed pr_palm
52	!
53	! 75 2007-03-22 09:54:05Z raasch
54	! Move call of user_actions( 'after_integration' ) below increment of times
55	! and counters,
56	! calls of prognostic_equations_.. changed to .._noopt, .._cache, and
57	! .._vector, these calls are now controlled by switch loop_optimization,
58	! uxrp, vynp eliminated, 2nd+3rd argument removed from exchange horiz,
59	! moisture renamed humidity
60	!
61	! RCS Log replace by Id keyword, revision history cleaned up
62	!
63	! Revision 1.8 2006/08/22 14:16:05 raasch
64	! Disturbances are imposed only for the last Runge-Kutta-substep
65	!
66	! Revision 1.2 2004/04/30 13:03:40 raasch
67	! decalpha-specific warning removed, routine name changed to time_integration,
68	! particle advection is carried out only once during the intermediate steps,
69	! impulse_advec renamed momentum_advec
70	!
71	! Revision 1.1 1997/08/11 06:19:04 raasch
72	! Initial revision
73	!
74	!
75	! Description:
76	! ------------
77	! Integration in time of the model equations, statistical analysis and graphic
78	! output
79	!------------------------------------------------------------------------------!
80
81	USE arrays_3d
82	USE averaging
83	USE control_parameters
84	USE cpulog
85	#if defined( __dvrp_graphics )
86	USE DVRP
87	#endif
88	USE grid_variables
89	USE indices
90	USE interaction_droplets_ptq_mod
91	USE interfaces
92	USE particle_attributes
93	USE pegrid
94	USE prognostic_equations_mod
95	USE statistics
96	USE user_actions_mod
97
98	IMPLICIT NONE
99
100	CHARACTER (LEN=9) :: time_to_string
101	INTEGER :: i, j, k
102
103	!
104	!-- At the beginning of a simulation determine the time step as well as
105	!-- determine and print out the run control parameters
106	IF ( simulated_time == 0.0 ) CALL timestep
107
108	CALL run_control
109
110
111	!
112	!-- Data exchange between coupled models in case that a call has been omitted
113	!-- at the end of the previous run of a job chain.
114	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
115	!
116	!-- In case of model termination initiated by the local model the coupler
117	!-- must not be called because this would again cause an MPI hang.
118	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
119	CALL surface_coupler
120	time_coupling = time_coupling - dt_coupling
121	ENDDO
122	IF (time_coupling == 0.0 .AND. time_since_reference_point < dt_coupling)&
123	THEN
124	time_coupling = time_since_reference_point
125	ENDIF
126	ENDIF
127
128
129	#if defined( __dvrp_graphics )
130	!
131	!-- Time measurement with dvrp software
132	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
133	#endif
134
135	!
136	!-- Start of the time loop
137	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
138	.NOT. terminate_run )
139
140	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
141	!
142	!-- Determine size of next time step
143	IF ( simulated_time /= 0.0 ) CALL timestep
144	!
145	!-- Execute the user-defined actions
146	CALL user_actions( 'before_timestep' )
147
148	!
149	!-- Start of intermediate step loop
150	intermediate_timestep_count = 0
151	DO WHILE ( intermediate_timestep_count < &
152	intermediate_timestep_count_max )
153
154	intermediate_timestep_count = intermediate_timestep_count + 1
155
156	!
157	!-- Set the steering factors for the prognostic equations which depend
158	!-- on the timestep scheme
159	CALL timestep_scheme_steering
160
161	!
162	!-- Solve the prognostic equations. A fast cache optimized version with
163	!-- only one single loop is used in case of Piascek-Williams advection
164	!-- scheme. NEC vector machines use a different version, because
165	!-- in the other versions a good vectorization is prohibited due to
166	!-- inlining problems.
167	IF ( loop_optimization == 'vector' ) THEN
168	CALL prognostic_equations_vector
169	ELSE
170	IF ( momentum_advec == 'ups-scheme' .OR. &
171	scalar_advec == 'ups-scheme' .OR. &
172	scalar_advec == 'bc-scheme' ) &
173	THEN
174	CALL prognostic_equations_noopt
175	ELSE
176	CALL prognostic_equations_cache
177	ENDIF
178	ENDIF
179
180	!
181	!-- Particle advection (only once during intermediate steps, because
182	!-- it uses an Euler-step)
183	IF ( particle_advection .AND. &
184	simulated_time >= particle_advection_start .AND. &
185	intermediate_timestep_count == 1 ) THEN
186	CALL advec_particles
187	first_call_advec_particles = .FALSE.
188	ENDIF
189
190	!
191	!-- Interaction of droplets with temperature and specific humidity.
192	!-- Droplet condensation and evaporation is calculated within
193	!-- advec_particles.
194	IF ( cloud_droplets .AND. &
195	intermediate_timestep_count == intermediate_timestep_count_max )&
196	THEN
197	CALL interaction_droplets_ptq
198	ENDIF
199
200	!
201	!-- Exchange of ghost points (lateral boundary conditions)
202	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
203	CALL exchange_horiz( u_p, nbgp )
204	CALL exchange_horiz( v_p, nbgp )
205	CALL exchange_horiz( w_p, nbgp )
206	CALL exchange_horiz( pt_p, nbgp )
207	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
208	IF ( ocean ) THEN
209	CALL exchange_horiz( sa_p, nbgp )
210	CALL exchange_horiz( rho, nbgp )
211	CALL exchange_horiz( prho, nbgp )
212	ENDIF
213	IF (humidity .OR. passive_scalar) CALL exchange_horiz( q_p, nbgp )
214	IF ( cloud_droplets ) THEN
215	CALL exchange_horiz( ql, nbgp )
216	CALL exchange_horiz( ql_c, nbgp )
217	CALL exchange_horiz( ql_v, nbgp )
218	CALL exchange_horiz( ql_vp, nbgp )
219	ENDIF
220	IF ( wang_collision_kernel ) CALL exchange_horiz( diss, nbgp )
221
222	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
223
224	!
225	!-- Apply time filter in case of leap-frog timestep
226	IF ( tsc(2) == 2.0 .AND. timestep_scheme(1:8) == 'leapfrog' ) THEN
227	CALL asselin_filter
228	ENDIF
229
230	!
231	!-- Boundary conditions for the prognostic quantities (except of the
232	!-- velocities at the outflow in case of a non-cyclic lateral wall)
233	CALL boundary_conds( 'main' )
234
235	!
236	!-- Swap the time levels in preparation for the next time step.
237	CALL swap_timelevel
238
239	!
240	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
241	!-- when a sloping surface is used
242	IF ( sloping_surface ) THEN
243	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
244	pt_slope_offset
245	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
246	pt_slope_offset
247	ENDIF
248
249	!
250	!-- Impose a turbulent inflow using the recycling method
251	IF ( turbulent_inflow ) CALL inflow_turbulence
252
253	!
254	!-- Impose a random perturbation on the horizontal velocity field
255	IF ( create_disturbances .AND. &
256	( call_psolver_at_all_substeps .AND. &
257	intermediate_timestep_count == intermediate_timestep_count_max )&
258	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
259	intermediate_timestep_count == 1 ) ) &
260	THEN
261	time_disturb = time_disturb + dt_3d
262	IF ( time_disturb >= dt_disturb ) THEN
263	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
264	CALL disturb_field( nzb_u_inner, tend, u )
265	CALL disturb_field( nzb_v_inner, tend, v )
266	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
267	!
268	!-- Runs with a non-cyclic lateral wall need perturbations
269	!-- near the inflow throughout the whole simulation
270	dist_range = 1
271	CALL disturb_field( nzb_u_inner, tend, u )
272	CALL disturb_field( nzb_v_inner, tend, v )
273	dist_range = 0
274	ENDIF
275	time_disturb = time_disturb - dt_disturb
276	ENDIF
277	ENDIF
278
279	!
280	!-- Reduce the velocity divergence via the equation for perturbation
281	!-- pressure.
282	IF ( intermediate_timestep_count == 1 .OR. &
283	call_psolver_at_all_substeps ) THEN
284	CALL pres
285	ENDIF
286
287	!
288	!-- If required, compute virtuell potential temperature
289	IF ( humidity ) CALL compute_vpt
290
291	!
292	!-- If required, compute liquid water content
293	IF ( cloud_physics ) CALL calc_liquid_water_content
294
295	!
296	!-- Compute the diffusion quantities
297	IF ( .NOT. constant_diffusion ) THEN
298
299	!
300	!-- First the vertical fluxes in the Prandtl layer are being computed
301	IF ( prandtl_layer ) THEN
302	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
303	CALL prandtl_fluxes
304	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
305	ENDIF
306
307	!
308	!-- Compute the diffusion coefficients
309	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
310	IF ( .NOT. humidity ) THEN
311	IF ( ocean ) THEN
312	CALL diffusivities( prho, prho_reference )
313	ELSE
314	CALL diffusivities( pt, pt_reference )
315	ENDIF
316	ELSE
317	CALL diffusivities( vpt, pt_reference )
318	ENDIF
319	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
320
321	ENDIF
322
323	ENDDO ! Intermediate step loop
324
325	!
326	!-- Increase simulation time and output times
327	current_timestep_number = current_timestep_number + 1
328	simulated_time = simulated_time + dt_3d
329	simulated_time_chr = time_to_string( simulated_time )
330	time_since_reference_point = simulated_time - coupling_start_time
331
332	IF ( simulated_time >= skip_time_data_output_av ) THEN
333	time_do_av = time_do_av + dt_3d
334	ENDIF
335	IF ( simulated_time >= skip_time_do2d_xy ) THEN
336	time_do2d_xy = time_do2d_xy + dt_3d
337	ENDIF
338	IF ( simulated_time >= skip_time_do2d_xz ) THEN
339	time_do2d_xz = time_do2d_xz + dt_3d
340	ENDIF
341	IF ( simulated_time >= skip_time_do2d_yz ) THEN
342	time_do2d_yz = time_do2d_yz + dt_3d
343	ENDIF
344	IF ( simulated_time >= skip_time_do3d ) THEN
345	time_do3d = time_do3d + dt_3d
346	ENDIF
347	DO mid = 1, masks
348	IF ( simulated_time >= skip_time_domask(mid) ) THEN
349	time_domask(mid)= time_domask(mid) + dt_3d
350	ENDIF
351	ENDDO
352	time_dvrp = time_dvrp + dt_3d
353	IF ( simulated_time >= skip_time_dosp ) THEN
354	time_dosp = time_dosp + dt_3d
355	ENDIF
356	time_dots = time_dots + dt_3d
357	IF ( .NOT. first_call_advec_particles ) THEN
358	time_dopts = time_dopts + dt_3d
359	ENDIF
360	IF ( simulated_time >= skip_time_dopr ) THEN
361	time_dopr = time_dopr + dt_3d
362	ENDIF
363	time_dopr_listing = time_dopr_listing + dt_3d
364	time_run_control = time_run_control + dt_3d
365
366	!
367	!-- Data exchange between coupled models
368	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
369	time_coupling = time_coupling + dt_3d
370
371	!
372	!-- In case of model termination initiated by the local model
373	!-- (terminate_coupled > 0), the coupler must be skipped because it would
374	!-- cause an MPI intercomminucation hang.
375	!-- If necessary, the coupler will be called at the beginning of the
376	!-- next restart run.
377	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
378	CALL surface_coupler
379	time_coupling = time_coupling - dt_coupling
380	ENDDO
381	ENDIF
382
383	!
384	!-- Execute user-defined actions
385	CALL user_actions( 'after_integration' )
386
387	!
388	!-- If Galilei transformation is used, determine the distance that the
389	!-- model has moved so far
390	IF ( galilei_transformation ) THEN
391	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
392	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
393	ENDIF
394
395	!
396	!-- Check, if restart is necessary (because cpu-time is expiring or
397	!-- because it is forced by user) and set stop flag
398	!-- This call is skipped if the remote model has already initiated a restart.
399	IF ( .NOT. terminate_run ) CALL check_for_restart
400
401	!
402	!-- Carry out statistical analysis and output at the requested output times.
403	!-- The MOD function is used for calculating the output time counters (like
404	!-- time_dopr) in order to regard a possible decrease of the output time
405	!-- interval in case of restart runs
406
407	!
408	!-- Set a flag indicating that so far no statistics have been created
409	!-- for this time step
410	flow_statistics_called = .FALSE.
411
412	!
413	!-- If required, call flow_statistics for averaging in time
414	IF ( averaging_interval_pr /= 0.0 .AND. &
415	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
416	simulated_time >= skip_time_dopr ) THEN
417	time_dopr_av = time_dopr_av + dt_3d
418	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
419	do_sum = .TRUE.
420	time_dopr_av = MOD( time_dopr_av, &
421	MAX( dt_averaging_input_pr, dt_3d ) )
422	ENDIF
423	ENDIF
424	IF ( do_sum ) CALL flow_statistics
425
426	!
427	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
428	IF ( averaging_interval /= 0.0 .AND. &
429	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
430	simulated_time >= skip_time_data_output_av ) &
431	THEN
432	time_do_sla = time_do_sla + dt_3d
433	IF ( time_do_sla >= dt_averaging_input ) THEN
434	CALL sum_up_3d_data
435	average_count_3d = average_count_3d + 1
436	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
437	ENDIF
438	ENDIF
439
440	!
441	!-- Calculate spectra for time averaging
442	IF ( averaging_interval_sp /= 0.0 .AND. &
443	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
444	simulated_time >= skip_time_dosp ) THEN
445	time_dosp_av = time_dosp_av + dt_3d
446	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
447	CALL calc_spectra
448	time_dosp_av = MOD( time_dosp_av, &
449	MAX( dt_averaging_input_pr, dt_3d ) )
450	ENDIF
451	ENDIF
452
453	!
454	!-- Computation and output of run control parameters.
455	!-- This is also done whenever the time step has changed or perturbations
456	!-- have been imposed
457	IF ( time_run_control >= dt_run_control .OR. &
458	( dt_changed .AND. timestep_scheme(1:5) /= 'runge' ) .OR. &
459	disturbance_created ) &
460	THEN
461	CALL run_control
462	IF ( time_run_control >= dt_run_control ) THEN
463	time_run_control = MOD( time_run_control, &
464	MAX( dt_run_control, dt_3d ) )
465	ENDIF
466	ENDIF
467
468	!
469	!-- Profile output (ASCII) on file
470	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
471	CALL print_1d
472	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
473	dt_3d ) )
474	ENDIF
475
476	!
477	!-- Graphic output for PROFIL
478	IF ( time_dopr >= dt_dopr ) THEN
479	IF ( dopr_n /= 0 ) CALL data_output_profiles
480	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
481	time_dopr_av = 0.0 ! due to averaging (see above)
482	ENDIF
483
484	!
485	!-- Graphic output for time series
486	IF ( time_dots >= dt_dots ) THEN
487	CALL data_output_tseries
488	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
489	ENDIF
490
491	!
492	!-- Output of spectra (formatted for use with PROFIL), in case of no
493	!-- time averaging, spectra has to be calculated before
494	IF ( time_dosp >= dt_dosp ) THEN
495	IF ( average_count_sp == 0 ) CALL calc_spectra
496	CALL data_output_spectra
497	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
498	ENDIF
499
500	!
501	!-- 2d-data output (cross-sections)
502	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
503	CALL data_output_2d( 'xy', 0 )
504	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
505	ENDIF
506	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
507	CALL data_output_2d( 'xz', 0 )
508	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
509	ENDIF
510	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
511	CALL data_output_2d( 'yz', 0 )
512	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
513	ENDIF
514
515	!
516	!-- 3d-data output (volume data)
517	IF ( time_do3d >= dt_do3d ) THEN
518	CALL data_output_3d( 0 )
519	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
520	ENDIF
521
522	!
523	!-- masked data output
524	DO mid = 1, masks
525	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
526	CALL data_output_mask( 0 )
527	time_domask(mid) = MOD( time_domask(mid), &
528	MAX( dt_domask(mid), dt_3d ) )
529	ENDIF
530	ENDDO
531
532	!
533	!-- Output of time-averaged 2d/3d/masked data
534	IF ( time_do_av >= dt_data_output_av ) THEN
535	CALL average_3d_data
536	CALL data_output_2d( 'xy', 1 )
537	CALL data_output_2d( 'xz', 1 )
538	CALL data_output_2d( 'yz', 1 )
539	CALL data_output_3d( 1 )
540	DO mid = 1, masks
541	CALL data_output_mask( 1 )
542	ENDDO
543	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
544	ENDIF
545
546	!
547	!-- Output of particle time series
548	IF ( particle_advection ) THEN
549	IF ( time_dopts >= dt_dopts .OR. &
550	( simulated_time >= particle_advection_start .AND. &
551	first_call_advec_particles ) ) THEN
552	CALL data_output_ptseries
553	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
554	ENDIF
555	ENDIF
556
557	!
558	!-- Output of dvrp-graphics (isosurface, particles, slicer)
559	#if defined( __dvrp_graphics )
560	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
561	#endif
562	IF ( time_dvrp >= dt_dvrp ) THEN
563	CALL data_output_dvrp
564	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
565	ENDIF
566	#if defined( __dvrp_graphics )
567	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
568	#endif
569
570	!
571	!-- If required, set the heat flux for the next time step at a random value
572	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
573
574	!
575	!-- Execute user-defined actions
576	CALL user_actions( 'after_timestep' )
577
578	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
579
580
581	ENDDO ! time loop
582
583	#if defined( __dvrp_graphics )
584	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
585	#endif
586
587	END SUBROUTINE time_integration

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