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source: palm/trunk/SOURCE/time_integration.f90 @ 552

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

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