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source: palm/trunk/SOURCE/time_integration.f90 @ 757

Last change on this file since 757 was 708, checked in by raasch, 14 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 708 2011-03-29 12:34:54Z helmke $
11	!
12	! 707 2011-03-29 11:39:40Z raasch
13	! bc_lr/ns replaced by bc_lr/ns_cyc, calls of exchange_horiz are modified,
14	! adaption to sloping surface
15	!
16	! 667 2010-12-23 12:06:00Z suehring/gryschka
17	! Calls of exchange_horiz are modified.
18	! Adaption to slooping surface.
19	!
20	! 449 2010-02-02 11:23:59Z raasch
21	! Bugfix: exchange of ghost points for prho included
22	!
23	! 410 2009-12-04 17:05:40Z letzel
24	! masked data output
25	!
26	! 388 2009-09-23 09:40:33Z raasch
27	! Using prho instead of rho in diffusvities.
28	! Coupling with independent precursor runs.
29	! Bugfix: output of particle time series only if particle advection is switched
30	! on
31	!
32	! 151 2008-03-07 13:42:18Z raasch
33	! inflow turbulence is imposed by calling new routine inflow_turbulence
34	!
35	! 108 2007-08-24 15:10:38Z letzel
36	! Call of new routine surface_coupler,
37	! presure solver is called after the first Runge-Kutta substep instead of the
38	! last in case that call_psolver_at_all_substeps = .F.; for this case, the
39	! random perturbation has to be added to the velocity fields also after the
40	! first substep
41	!
42	! 97 2007-06-21 08:23:15Z raasch
43	! diffusivities is called with argument rho in case of ocean runs,
44	! new argument pt_/prho_reference in calls of diffusivities,
45	! ghostpoint exchange for salinity and density
46	!
47	! 87 2007-05-22 15:46:47Z raasch
48	! var_hom renamed pr_palm
49	!
50	! 75 2007-03-22 09:54:05Z raasch
51	! Move call of user_actions( 'after_integration' ) below increment of times
52	! and counters,
53	! calls of prognostic_equations_.. changed to .._noopt, .._cache, and
54	! .._vector, these calls are now controlled by switch loop_optimization,
55	! uxrp, vynp eliminated, 2nd+3rd argument removed from exchange horiz,
56	! moisture renamed humidity
57	!
58	! RCS Log replace by Id keyword, revision history cleaned up
59	!
60	! Revision 1.8 2006/08/22 14:16:05 raasch
61	! Disturbances are imposed only for the last Runge-Kutta-substep
62	!
63	! Revision 1.2 2004/04/30 13:03:40 raasch
64	! decalpha-specific warning removed, routine name changed to time_integration,
65	! particle advection is carried out only once during the intermediate steps,
66	! impulse_advec renamed momentum_advec
67	!
68	! Revision 1.1 1997/08/11 06:19:04 raasch
69	! Initial revision
70	!
71	!
72	! Description:
73	! ------------
74	! Integration in time of the model equations, statistical analysis and graphic
75	! output
76	!------------------------------------------------------------------------------!
77
78	USE arrays_3d
79	USE averaging
80	USE control_parameters
81	USE cpulog
82	#if defined( __dvrp_graphics )
83	USE DVRP
84	#endif
85	USE grid_variables
86	USE indices
87	USE interaction_droplets_ptq_mod
88	USE interfaces
89	USE particle_attributes
90	USE pegrid
91	USE prognostic_equations_mod
92	USE statistics
93	USE user_actions_mod
94
95	IMPLICIT NONE
96
97	CHARACTER (LEN=9) :: time_to_string
98	INTEGER :: i, j, k
99
100	!
101	!-- At the beginning of a simulation determine the time step as well as
102	!-- determine and print out the run control parameters
103	IF ( simulated_time == 0.0 ) CALL timestep
104
105	CALL run_control
106
107
108	!
109	!-- Data exchange between coupled models in case that a call has been omitted
110	!-- at the end of the previous run of a job chain.
111	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
112	!
113	!-- In case of model termination initiated by the local model the coupler
114	!-- must not be called because this would again cause an MPI hang.
115	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
116	CALL surface_coupler
117	time_coupling = time_coupling - dt_coupling
118	ENDDO
119	IF (time_coupling == 0.0 .AND. time_since_reference_point < dt_coupling)&
120	THEN
121	time_coupling = time_since_reference_point
122	ENDIF
123	ENDIF
124
125
126	#if defined( __dvrp_graphics )
127	!
128	!-- Time measurement with dvrp software
129	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
130	#endif
131
132	!
133	!-- Start of the time loop
134	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
135	.NOT. terminate_run )
136
137	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
138	!
139	!-- Determine size of next time step
140	IF ( simulated_time /= 0.0 ) CALL timestep
141	!
142	!-- Execute the user-defined actions
143	CALL user_actions( 'before_timestep' )
144
145	!
146	!-- Start of intermediate step loop
147	intermediate_timestep_count = 0
148	DO WHILE ( intermediate_timestep_count < &
149	intermediate_timestep_count_max )
150
151	intermediate_timestep_count = intermediate_timestep_count + 1
152
153	!
154	!-- Set the steering factors for the prognostic equations which depend
155	!-- on the timestep scheme
156	CALL timestep_scheme_steering
157
158	!
159	!-- Solve the prognostic equations. A fast cache optimized version with
160	!-- only one single loop is used in case of Piascek-Williams advection
161	!-- scheme. NEC vector machines use a different version, because
162	!-- in the other versions a good vectorization is prohibited due to
163	!-- inlining problems.
164	IF ( loop_optimization == 'vector' ) THEN
165	CALL prognostic_equations_vector
166	ELSE
167	IF ( momentum_advec == 'ups-scheme' .OR. &
168	scalar_advec == 'ups-scheme' .OR. &
169	scalar_advec == 'bc-scheme' ) &
170	THEN
171	CALL prognostic_equations_noopt
172	ELSE
173	CALL prognostic_equations_cache
174	ENDIF
175	ENDIF
176
177	!
178	!-- Particle advection (only once during intermediate steps, because
179	!-- it uses an Euler-step)
180	IF ( particle_advection .AND. &
181	simulated_time >= particle_advection_start .AND. &
182	intermediate_timestep_count == 1 ) THEN
183	CALL advec_particles
184	first_call_advec_particles = .FALSE.
185	ENDIF
186
187	!
188	!-- Interaction of droplets with temperature and specific humidity.
189	!-- Droplet condensation and evaporation is calculated within
190	!-- advec_particles.
191	IF ( cloud_droplets .AND. &
192	intermediate_timestep_count == intermediate_timestep_count_max )&
193	THEN
194	CALL interaction_droplets_ptq
195	ENDIF
196
197	!
198	!-- Exchange of ghost points (lateral boundary conditions)
199	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
200	CALL exchange_horiz( u_p, nbgp )
201	CALL exchange_horiz( v_p, nbgp )
202	CALL exchange_horiz( w_p, nbgp )
203	CALL exchange_horiz( pt_p, nbgp )
204	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
205	IF ( ocean ) THEN
206	CALL exchange_horiz( sa_p, nbgp )
207	CALL exchange_horiz( rho, nbgp )
208	CALL exchange_horiz( prho, nbgp )
209	ENDIF
210	IF (humidity .OR. passive_scalar) CALL exchange_horiz( q_p, nbgp )
211	IF ( cloud_droplets ) THEN
212	CALL exchange_horiz( ql, nbgp )
213	CALL exchange_horiz( ql_c, nbgp )
214	CALL exchange_horiz( ql_v, nbgp )
215	CALL exchange_horiz( ql_vp, nbgp )
216	ENDIF
217
218	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
219
220	!
221	!-- Apply time filter in case of leap-frog timestep
222	IF ( tsc(2) == 2.0 .AND. timestep_scheme(1:8) == 'leapfrog' ) THEN
223	CALL asselin_filter
224	ENDIF
225
226	!
227	!-- Boundary conditions for the prognostic quantities (except of the
228	!-- velocities at the outflow in case of a non-cyclic lateral wall)
229	CALL boundary_conds( 'main' )
230
231	!
232	!-- Swap the time levels in preparation for the next time step.
233	CALL swap_timelevel
234
235	!
236	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
237	!-- when a sloping surface is used
238	IF ( sloping_surface ) THEN
239	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
240	pt_slope_offset
241	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
242	pt_slope_offset
243	ENDIF
244
245	!
246	!-- Impose a turbulent inflow using the recycling method
247	IF ( turbulent_inflow ) CALL inflow_turbulence
248
249	!
250	!-- Impose a random perturbation on the horizontal velocity field
251	IF ( create_disturbances .AND. &
252	( call_psolver_at_all_substeps .AND. &
253	intermediate_timestep_count == intermediate_timestep_count_max )&
254	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
255	intermediate_timestep_count == 1 ) ) &
256	THEN
257	time_disturb = time_disturb + dt_3d
258	IF ( time_disturb >= dt_disturb ) THEN
259	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
260	CALL disturb_field( nzb_u_inner, tend, u )
261	CALL disturb_field( nzb_v_inner, tend, v )
262	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
263	!
264	!-- Runs with a non-cyclic lateral wall need perturbations
265	!-- near the inflow throughout the whole simulation
266	dist_range = 1
267	CALL disturb_field( nzb_u_inner, tend, u )
268	CALL disturb_field( nzb_v_inner, tend, v )
269	dist_range = 0
270	ENDIF
271	time_disturb = time_disturb - dt_disturb
272	ENDIF
273	ENDIF
274
275	!
276	!-- Reduce the velocity divergence via the equation for perturbation
277	!-- pressure.
278	IF ( intermediate_timestep_count == 1 .OR. &
279	call_psolver_at_all_substeps ) THEN
280	CALL pres
281	ENDIF
282
283	!
284	!-- If required, compute virtuell potential temperature
285	IF ( humidity ) CALL compute_vpt
286
287	!
288	!-- If required, compute liquid water content
289	IF ( cloud_physics ) CALL calc_liquid_water_content
290
291	!
292	!-- Compute the diffusion quantities
293	IF ( .NOT. constant_diffusion ) THEN
294
295	!
296	!-- First the vertical fluxes in the Prandtl layer are being computed
297	IF ( prandtl_layer ) THEN
298	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
299	CALL prandtl_fluxes
300	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
301	ENDIF
302
303	!
304	!-- Compute the diffusion coefficients
305	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
306	IF ( .NOT. humidity ) THEN
307	IF ( ocean ) THEN
308	CALL diffusivities( prho, prho_reference )
309	ELSE
310	CALL diffusivities( pt, pt_reference )
311	ENDIF
312	ELSE
313	CALL diffusivities( vpt, pt_reference )
314	ENDIF
315	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
316
317	ENDIF
318
319	ENDDO ! Intermediate step loop
320
321	!
322	!-- Increase simulation time and output times
323	current_timestep_number = current_timestep_number + 1
324	simulated_time = simulated_time + dt_3d
325	simulated_time_chr = time_to_string( simulated_time )
326	time_since_reference_point = simulated_time - coupling_start_time
327
328	IF ( simulated_time >= skip_time_data_output_av ) THEN
329	time_do_av = time_do_av + dt_3d
330	ENDIF
331	IF ( simulated_time >= skip_time_do2d_xy ) THEN
332	time_do2d_xy = time_do2d_xy + dt_3d
333	ENDIF
334	IF ( simulated_time >= skip_time_do2d_xz ) THEN
335	time_do2d_xz = time_do2d_xz + dt_3d
336	ENDIF
337	IF ( simulated_time >= skip_time_do2d_yz ) THEN
338	time_do2d_yz = time_do2d_yz + dt_3d
339	ENDIF
340	IF ( simulated_time >= skip_time_do3d ) THEN
341	time_do3d = time_do3d + dt_3d
342	ENDIF
343	DO mid = 1, masks
344	IF ( simulated_time >= skip_time_domask(mid) ) THEN
345	time_domask(mid)= time_domask(mid) + dt_3d
346	ENDIF
347	ENDDO
348	time_dvrp = time_dvrp + dt_3d
349	IF ( simulated_time >= skip_time_dosp ) THEN
350	time_dosp = time_dosp + dt_3d
351	ENDIF
352	time_dots = time_dots + dt_3d
353	IF ( .NOT. first_call_advec_particles ) THEN
354	time_dopts = time_dopts + dt_3d
355	ENDIF
356	IF ( simulated_time >= skip_time_dopr ) THEN
357	time_dopr = time_dopr + dt_3d
358	ENDIF
359	time_dopr_listing = time_dopr_listing + dt_3d
360	time_run_control = time_run_control + dt_3d
361
362	!
363	!-- Data exchange between coupled models
364	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
365	time_coupling = time_coupling + dt_3d
366
367	!
368	!-- In case of model termination initiated by the local model
369	!-- (terminate_coupled > 0), the coupler must be skipped because it would
370	!-- cause an MPI intercomminucation hang.
371	!-- If necessary, the coupler will be called at the beginning of the
372	!-- next restart run.
373	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
374	CALL surface_coupler
375	time_coupling = time_coupling - dt_coupling
376	ENDDO
377	ENDIF
378
379	!
380	!-- Execute user-defined actions
381	CALL user_actions( 'after_integration' )
382
383	!
384	!-- If Galilei transformation is used, determine the distance that the
385	!-- model has moved so far
386	IF ( galilei_transformation ) THEN
387	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
388	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
389	ENDIF
390
391	!
392	!-- Check, if restart is necessary (because cpu-time is expiring or
393	!-- because it is forced by user) and set stop flag
394	!-- This call is skipped if the remote model has already initiated a restart.
395	IF ( .NOT. terminate_run ) CALL check_for_restart
396
397	!
398	!-- Carry out statistical analysis and output at the requested output times.
399	!-- The MOD function is used for calculating the output time counters (like
400	!-- time_dopr) in order to regard a possible decrease of the output time
401	!-- interval in case of restart runs
402
403	!
404	!-- Set a flag indicating that so far no statistics have been created
405	!-- for this time step
406	flow_statistics_called = .FALSE.
407
408	!
409	!-- If required, call flow_statistics for averaging in time
410	IF ( averaging_interval_pr /= 0.0 .AND. &
411	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
412	simulated_time >= skip_time_dopr ) THEN
413	time_dopr_av = time_dopr_av + dt_3d
414	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
415	do_sum = .TRUE.
416	time_dopr_av = MOD( time_dopr_av, &
417	MAX( dt_averaging_input_pr, dt_3d ) )
418	ENDIF
419	ENDIF
420	IF ( do_sum ) CALL flow_statistics
421
422	!
423	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
424	IF ( averaging_interval /= 0.0 .AND. &
425	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
426	simulated_time >= skip_time_data_output_av ) &
427	THEN
428	time_do_sla = time_do_sla + dt_3d
429	IF ( time_do_sla >= dt_averaging_input ) THEN
430	CALL sum_up_3d_data
431	average_count_3d = average_count_3d + 1
432	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
433	ENDIF
434	ENDIF
435
436	!
437	!-- Calculate spectra for time averaging
438	IF ( averaging_interval_sp /= 0.0 .AND. &
439	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
440	simulated_time >= skip_time_dosp ) THEN
441	time_dosp_av = time_dosp_av + dt_3d
442	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
443	CALL calc_spectra
444	time_dosp_av = MOD( time_dosp_av, &
445	MAX( dt_averaging_input_pr, dt_3d ) )
446	ENDIF
447	ENDIF
448
449	!
450	!-- Computation and output of run control parameters.
451	!-- This is also done whenever the time step has changed or perturbations
452	!-- have been imposed
453	IF ( time_run_control >= dt_run_control .OR. &
454	( dt_changed .AND. timestep_scheme(1:5) /= 'runge' ) .OR. &
455	disturbance_created ) &
456	THEN
457	CALL run_control
458	IF ( time_run_control >= dt_run_control ) THEN
459	time_run_control = MOD( time_run_control, &
460	MAX( dt_run_control, dt_3d ) )
461	ENDIF
462	ENDIF
463
464	!
465	!-- Profile output (ASCII) on file
466	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
467	CALL print_1d
468	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
469	dt_3d ) )
470	ENDIF
471
472	!
473	!-- Graphic output for PROFIL
474	IF ( time_dopr >= dt_dopr ) THEN
475	IF ( dopr_n /= 0 ) CALL data_output_profiles
476	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
477	time_dopr_av = 0.0 ! due to averaging (see above)
478	ENDIF
479
480	!
481	!-- Graphic output for time series
482	IF ( time_dots >= dt_dots ) THEN
483	CALL data_output_tseries
484	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
485	ENDIF
486
487	!
488	!-- Output of spectra (formatted for use with PROFIL), in case of no
489	!-- time averaging, spectra has to be calculated before
490	IF ( time_dosp >= dt_dosp ) THEN
491	IF ( average_count_sp == 0 ) CALL calc_spectra
492	CALL data_output_spectra
493	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
494	ENDIF
495
496	!
497	!-- 2d-data output (cross-sections)
498	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
499	CALL data_output_2d( 'xy', 0 )
500	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
501	ENDIF
502	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
503	CALL data_output_2d( 'xz', 0 )
504	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
505	ENDIF
506	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
507	CALL data_output_2d( 'yz', 0 )
508	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
509	ENDIF
510
511	!
512	!-- 3d-data output (volume data)
513	IF ( time_do3d >= dt_do3d ) THEN
514	CALL data_output_3d( 0 )
515	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
516	ENDIF
517
518	!
519	!-- masked data output
520	DO mid = 1, masks
521	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
522	CALL data_output_mask( 0 )
523	time_domask(mid) = MOD( time_domask(mid), &
524	MAX( dt_domask(mid), dt_3d ) )
525	ENDIF
526	ENDDO
527
528	!
529	!-- Output of time-averaged 2d/3d/masked data
530	IF ( time_do_av >= dt_data_output_av ) THEN
531	CALL average_3d_data
532	CALL data_output_2d( 'xy', 1 )
533	CALL data_output_2d( 'xz', 1 )
534	CALL data_output_2d( 'yz', 1 )
535	CALL data_output_3d( 1 )
536	DO mid = 1, masks
537	CALL data_output_mask( 1 )
538	ENDDO
539	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
540	ENDIF
541
542	!
543	!-- Output of particle time series
544	IF ( particle_advection ) THEN
545	IF ( time_dopts >= dt_dopts .OR. &
546	( simulated_time >= particle_advection_start .AND. &
547	first_call_advec_particles ) ) THEN
548	CALL data_output_ptseries
549	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
550	ENDIF
551	ENDIF
552
553	!
554	!-- Output of dvrp-graphics (isosurface, particles, slicer)
555	#if defined( __dvrp_graphics )
556	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
557	#endif
558	IF ( time_dvrp >= dt_dvrp ) THEN
559	CALL data_output_dvrp
560	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
561	ENDIF
562	#if defined( __dvrp_graphics )
563	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
564	#endif
565
566	!
567	!-- If required, set the heat flux for the next time step at a random value
568	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
569
570	!
571	!-- Execute user-defined actions
572	CALL user_actions( 'after_timestep' )
573
574	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
575
576
577	ENDDO ! time loop
578
579	#if defined( __dvrp_graphics )
580	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
581	#endif
582
583	END SUBROUTINE time_integration

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