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source: palm/trunk/SOURCE/time_integration.f90 @ 251

Last change on this file since 251 was 198, checked in by raasch, 16 years ago
file headers updated for the next release 3.5
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1	SUBROUTINE time_integration
2
3	!------------------------------------------------------------------------------!
4	! Actual revisions:
5	! -----------------
6	!
7	!
8	! Former revisions:
9	! -----------------
10	! $Id: time_integration.f90 198 2008-09-17 08:55:28Z raasch $
11	!
12	! 151 2008-03-07 13:42:18Z raasch
13	! inflow turbulence is imposed by calling new routine inflow_turbulence
14	!
15	! 108 2007-08-24 15:10:38Z letzel
16	! Call of new routine surface_coupler,
17	! presure solver is called after the first Runge-Kutta substep instead of the
18	! last in case that call_psolver_at_all_substeps = .F.; for this case, the
19	! random perturbation has to be added to the velocity fields also after the
20	! first substep
21	!
22	! 97 2007-06-21 08:23:15Z raasch
23	! diffusivities is called with argument rho in case of ocean runs,
24	! new argument pt_/prho_reference in calls of diffusivities,
25	! ghostpoint exchange for salinity and density
26	!
27	! 87 2007-05-22 15:46:47Z raasch
28	! var_hom renamed pr_palm
29	!
30	! 75 2007-03-22 09:54:05Z raasch
31	! Move call of user_actions( 'after_integration' ) below increment of times
32	! and counters,
33	! calls of prognostic_equations_.. changed to .._noopt, .._cache, and
34	! .._vector, these calls are now controlled by switch loop_optimization,
35	! uxrp, vynp eliminated, 2nd+3rd argument removed from exchange horiz,
36	! moisture renamed humidity
37	!
38	! RCS Log replace by Id keyword, revision history cleaned up
39	!
40	! Revision 1.8 2006/08/22 14:16:05 raasch
41	! Disturbances are imposed only for the last Runge-Kutta-substep
42	!
43	! Revision 1.2 2004/04/30 13:03:40 raasch
44	! decalpha-specific warning removed, routine name changed to time_integration,
45	! particle advection is carried out only once during the intermediate steps,
46	! impulse_advec renamed momentum_advec
47	!
48	! Revision 1.1 1997/08/11 06:19:04 raasch
49	! Initial revision
50	!
51	!
52	! Description:
53	! ------------
54	! Integration in time of the model equations, statistical analysis and graphic
55	! output
56	!------------------------------------------------------------------------------!
57
58	USE arrays_3d
59	USE averaging
60	USE control_parameters
61	USE cpulog
62	#if defined( __dvrp_graphics )
63	USE DVRP
64	#endif
65	USE grid_variables
66	USE indices
67	USE interaction_droplets_ptq_mod
68	USE interfaces
69	USE particle_attributes
70	USE pegrid
71	USE prognostic_equations_mod
72	USE statistics
73	USE user_actions_mod
74
75	IMPLICIT NONE
76
77	CHARACTER (LEN=9) :: time_to_string
78	INTEGER :: i, j, k
79
80	!
81	!-- At the beginning of a simulation determine the time step as well as
82	!-- determine and print out the run control parameters
83	IF ( simulated_time == 0.0 ) CALL timestep
84	CALL run_control
85
86	!
87	!-- Data exchange between coupled models in case that a call has been omitted
88	!-- at the end of the previous run of a job chain.
89	IF ( coupling_mode /= 'uncoupled' ) THEN
90	!
91	!-- In case of model termination initiated by the local model the coupler
92	!-- must not be called because this would again cause an MPI hang.
93	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
94	CALL surface_coupler
95	time_coupling = time_coupling - dt_coupling
96	ENDDO
97	ENDIF
98
99
100	#if defined( __dvrp_graphics )
101	!
102	!-- Time measurement with dvrp software
103	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
104	#endif
105
106	!
107	!-- Start of the time loop
108	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
109	.NOT. terminate_run )
110
111	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
112
113	!
114	!-- Determine size of next time step
115	IF ( simulated_time /= 0.0 ) CALL timestep
116
117	!
118	!-- Execute the user-defined actions
119	CALL user_actions( 'before_timestep' )
120
121	!
122	!-- Start of intermediate step loop
123	intermediate_timestep_count = 0
124	DO WHILE ( intermediate_timestep_count < &
125	intermediate_timestep_count_max )
126
127	intermediate_timestep_count = intermediate_timestep_count + 1
128
129	!
130	!-- Set the steering factors for the prognostic equations which depend
131	!-- on the timestep scheme
132	CALL timestep_scheme_steering
133
134	!
135	!-- Solve the prognostic equations. A fast cache optimized version with
136	!-- only one single loop is used in case of Piascek-Williams advection
137	!-- scheme. NEC vector machines use a different version, because
138	!-- in the other versions a good vectorization is prohibited due to
139	!-- inlining problems.
140	IF ( loop_optimization == 'vector' ) THEN
141	CALL prognostic_equations_vector
142	ELSE
143	IF ( momentum_advec == 'ups-scheme' .OR. &
144	scalar_advec == 'ups-scheme' .OR. &
145	scalar_advec == 'bc-scheme' ) &
146	THEN
147	CALL prognostic_equations_noopt
148	ELSE
149	CALL prognostic_equations_cache
150	ENDIF
151	ENDIF
152
153	!
154	!-- Particle advection (only once during intermediate steps, because
155	!-- it uses an Euler-step)
156	IF ( particle_advection .AND. &
157	simulated_time >= particle_advection_start .AND. &
158	intermediate_timestep_count == 1 ) THEN
159	CALL advec_particles
160	first_call_advec_particles = .FALSE.
161	ENDIF
162
163	!
164	!-- Interaction of droplets with temperature and specific humidity.
165	!-- Droplet condensation and evaporation is calculated within
166	!-- advec_particles.
167	IF ( cloud_droplets .AND. &
168	intermediate_timestep_count == intermediate_timestep_count_max )&
169	THEN
170	CALL interaction_droplets_ptq
171	ENDIF
172
173	!
174	!-- Exchange of ghost points (lateral boundary conditions)
175	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
176	CALL exchange_horiz( u_p )
177	CALL exchange_horiz( v_p )
178	CALL exchange_horiz( w_p )
179	CALL exchange_horiz( pt_p )
180	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p )
181	IF ( ocean ) THEN
182	CALL exchange_horiz( sa_p )
183	CALL exchange_horiz( rho )
184	ENDIF
185	IF ( humidity .OR. passive_scalar ) CALL exchange_horiz( q_p )
186	IF ( cloud_droplets ) THEN
187	CALL exchange_horiz( ql )
188	CALL exchange_horiz( ql_c )
189	CALL exchange_horiz( ql_v )
190	CALL exchange_horiz( ql_vp )
191	ENDIF
192
193	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
194
195	!
196	!-- Apply time filter in case of leap-frog timestep
197	IF ( tsc(2) == 2.0 .AND. timestep_scheme(1:8) == 'leapfrog' ) THEN
198	CALL asselin_filter
199	ENDIF
200
201	!
202	!-- Boundary conditions for the prognostic quantities (except of the
203	!-- velocities at the outflow in case of a non-cyclic lateral wall)
204	CALL boundary_conds( 'main' )
205
206	!
207	!-- Swap the time levels in preparation for the next time step.
208	CALL swap_timelevel
209
210	!
211	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
212	!-- when a sloping surface is used
213	IF ( sloping_surface ) THEN
214	IF ( nxl == 0 ) pt(:,:,nxl-1) = pt(:,:,nxl-1) - pt_slope_offset
215	IF ( nxr == nx ) pt(:,:,nxr+1) = pt(:,:,nxr+1) + pt_slope_offset
216	ENDIF
217
218	!
219	!-- Impose a turbulent inflow using the recycling method
220	IF ( turbulent_inflow ) CALL inflow_turbulence
221
222	!
223	!-- Impose a random perturbation on the horizontal velocity field
224	IF ( create_disturbances .AND. &
225	( call_psolver_at_all_substeps .AND. &
226	intermediate_timestep_count == intermediate_timestep_count_max )&
227	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
228	intermediate_timestep_count == 1 ) ) &
229	THEN
230	time_disturb = time_disturb + dt_3d
231	IF ( time_disturb >= dt_disturb ) THEN
232	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
233	CALL disturb_field( nzb_u_inner, tend, u )
234	CALL disturb_field( nzb_v_inner, tend, v )
235	ELSEIF ( bc_lr /= 'cyclic' .OR. bc_ns /= 'cyclic' ) THEN
236	!
237	!-- Runs with a non-cyclic lateral wall need perturbations
238	!-- near the inflow throughout the whole simulation
239	dist_range = 1
240	CALL disturb_field( nzb_u_inner, tend, u )
241	CALL disturb_field( nzb_v_inner, tend, v )
242	dist_range = 0
243	ENDIF
244	time_disturb = time_disturb - dt_disturb
245	ENDIF
246	ENDIF
247
248	!
249	!-- Reduce the velocity divergence via the equation for perturbation
250	!-- pressure.
251	IF ( intermediate_timestep_count == 1 .OR. &
252	call_psolver_at_all_substeps ) THEN
253	CALL pres
254	ENDIF
255
256	!
257	!-- If required, compute virtuell potential temperature
258	IF ( humidity ) CALL compute_vpt
259
260	!
261	!-- If required, compute liquid water content
262	IF ( cloud_physics ) CALL calc_liquid_water_content
263
264	!
265	!-- Compute the diffusion quantities
266	IF ( .NOT. constant_diffusion ) THEN
267
268	!
269	!-- First the vertical fluxes in the Prandtl layer are being computed
270	IF ( prandtl_layer ) THEN
271	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
272	CALL prandtl_fluxes
273	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
274	ENDIF
275
276	!
277	!-- Compute the diffusion coefficients
278	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
279	IF ( .NOT. humidity ) THEN
280	IF ( ocean ) THEN
281	CALL diffusivities( rho, prho_reference )
282	ELSE
283	CALL diffusivities( pt, pt_reference )
284	ENDIF
285	ELSE
286	CALL diffusivities( vpt, pt_reference )
287	ENDIF
288	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
289
290	ENDIF
291
292	ENDDO ! Intermediate step loop
293
294	!
295	!-- Increase simulation time and output times
296	current_timestep_number = current_timestep_number + 1
297	simulated_time = simulated_time + dt_3d
298	simulated_time_chr = time_to_string( simulated_time )
299	IF ( simulated_time >= skip_time_data_output_av ) THEN
300	time_do_av = time_do_av + dt_3d
301	ENDIF
302	IF ( simulated_time >= skip_time_do2d_xy ) THEN
303	time_do2d_xy = time_do2d_xy + dt_3d
304	ENDIF
305	IF ( simulated_time >= skip_time_do2d_xz ) THEN
306	time_do2d_xz = time_do2d_xz + dt_3d
307	ENDIF
308	IF ( simulated_time >= skip_time_do2d_yz ) THEN
309	time_do2d_yz = time_do2d_yz + dt_3d
310	ENDIF
311	IF ( simulated_time >= skip_time_do3d ) THEN
312	time_do3d = time_do3d + dt_3d
313	ENDIF
314	time_dvrp = time_dvrp + dt_3d
315	IF ( simulated_time >= skip_time_dosp ) THEN
316	time_dosp = time_dosp + dt_3d
317	ENDIF
318	time_dots = time_dots + dt_3d
319	IF ( .NOT. first_call_advec_particles ) THEN
320	time_dopts = time_dopts + dt_3d
321	ENDIF
322	IF ( simulated_time >= skip_time_dopr ) THEN
323	time_dopr = time_dopr + dt_3d
324	ENDIF
325	time_dopr_listing = time_dopr_listing + dt_3d
326	time_run_control = time_run_control + dt_3d
327
328	!
329	!-- Data exchange between coupled models
330	IF ( coupling_mode /= 'uncoupled' ) THEN
331	time_coupling = time_coupling + dt_3d
332	!
333	!-- In case of model termination initiated by the local model
334	!-- (terminate_coupled > 0), the coupler must be skipped because it would
335	!-- cause an MPI intercomminucation hang.
336	!-- If necessary, the coupler will be called at the beginning of the
337	!-- next restart run.
338	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
339	CALL surface_coupler
340	time_coupling = time_coupling - dt_coupling
341	ENDDO
342	ENDIF
343
344	!
345	!-- Execute user-defined actions
346	CALL user_actions( 'after_integration' )
347
348	!
349	!-- If Galilei transformation is used, determine the distance that the
350	!-- model has moved so far
351	IF ( galilei_transformation ) THEN
352	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
353	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
354	ENDIF
355
356	!
357	!-- Check, if restart is necessary (because cpu-time is expiring or
358	!-- because it is forced by user) and set stop flag
359	!-- This call is skipped if the remote model has already initiated a restart.
360	IF ( .NOT. terminate_run ) CALL check_for_restart
361
362	!
363	!-- Carry out statistical analysis and output at the requested output times.
364	!-- The MOD function is used for calculating the output time counters (like
365	!-- time_dopr) in order to regard a possible decrease of the output time
366	!-- interval in case of restart runs
367
368	!
369	!-- Set a flag indicating that so far no statistics have been created
370	!-- for this time step
371	flow_statistics_called = .FALSE.
372
373	!
374	!-- If required, call flow_statistics for averaging in time
375	IF ( averaging_interval_pr /= 0.0 .AND. &
376	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
377	simulated_time >= skip_time_dopr ) THEN
378	time_dopr_av = time_dopr_av + dt_3d
379	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
380	do_sum = .TRUE.
381	time_dopr_av = MOD( time_dopr_av, &
382	MAX( dt_averaging_input_pr, dt_3d ) )
383	ENDIF
384	ENDIF
385	IF ( do_sum ) CALL flow_statistics
386
387	!
388	!-- Sum-up 3d-arrays for later output of time-averaged data
389	IF ( averaging_interval /= 0.0 .AND. &
390	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
391	simulated_time >= skip_time_data_output_av ) &
392	THEN
393	time_do_sla = time_do_sla + dt_3d
394	IF ( time_do_sla >= dt_averaging_input ) THEN
395	CALL sum_up_3d_data
396	average_count_3d = average_count_3d + 1
397	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
398	ENDIF
399	ENDIF
400
401	!
402	!-- Calculate spectra for time averaging
403	IF ( averaging_interval_sp /= 0.0 .AND. &
404	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
405	simulated_time >= skip_time_dosp ) THEN
406	time_dosp_av = time_dosp_av + dt_3d
407	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
408	CALL calc_spectra
409	time_dosp_av = MOD( time_dosp_av, &
410	MAX( dt_averaging_input_pr, dt_3d ) )
411	ENDIF
412	ENDIF
413
414	!
415	!-- Computation and output of run control parameters.
416	!-- This is also done whenever the time step has changed or perturbations
417	!-- have been imposed
418	IF ( time_run_control >= dt_run_control .OR. &
419	( dt_changed .AND. timestep_scheme(1:5) /= 'runge' ) .OR. &
420	disturbance_created ) &
421	THEN
422	CALL run_control
423	IF ( time_run_control >= dt_run_control ) THEN
424	time_run_control = MOD( time_run_control, &
425	MAX( dt_run_control, dt_3d ) )
426	ENDIF
427	ENDIF
428
429	!
430	!-- Profile output (ASCII) on file
431	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
432	CALL print_1d
433	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
434	dt_3d ) )
435	ENDIF
436
437	!
438	!-- Graphic output for PROFIL
439	IF ( time_dopr >= dt_dopr ) THEN
440	IF ( dopr_n /= 0 ) CALL data_output_profiles
441	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
442	time_dopr_av = 0.0 ! due to averaging (see above)
443	ENDIF
444
445	!
446	!-- Graphic output for time series
447	IF ( time_dots >= dt_dots ) THEN
448	CALL data_output_tseries
449	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
450	ENDIF
451
452	!
453	!-- Output of spectra (formatted for use with PROFIL), in case of no
454	!-- time averaging, spectra has to be calculated before
455	IF ( time_dosp >= dt_dosp ) THEN
456	IF ( average_count_sp == 0 ) CALL calc_spectra
457	CALL data_output_spectra
458	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
459	ENDIF
460
461	!
462	!-- 2d-data output (cross-sections)
463	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
464	CALL data_output_2d( 'xy', 0 )
465	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
466	ENDIF
467	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
468	CALL data_output_2d( 'xz', 0 )
469	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
470	ENDIF
471	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
472	CALL data_output_2d( 'yz', 0 )
473	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
474	ENDIF
475
476	!
477	!-- 3d-data output (volume data)
478	IF ( time_do3d >= dt_do3d ) THEN
479	CALL data_output_3d( 0 )
480	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
481	ENDIF
482
483	!
484	!-- Output of time-averaged 2d/3d-data
485	IF ( time_do_av >= dt_data_output_av ) THEN
486	CALL average_3d_data
487	CALL data_output_2d( 'xy', 1 )
488	CALL data_output_2d( 'xz', 1 )
489	CALL data_output_2d( 'yz', 1 )
490	CALL data_output_3d( 1 )
491	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
492	ENDIF
493
494	!
495	!-- Output of particle time series
496	IF ( time_dopts >= dt_dopts .OR. &
497	( simulated_time >= particle_advection_start .AND. &
498	first_call_advec_particles ) ) THEN
499	CALL data_output_ptseries
500	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
501	ENDIF
502
503	!
504	!-- Output of dvrp-graphics (isosurface, particles, slicer)
505	#if defined( __dvrp_graphics )
506	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
507	#endif
508	IF ( time_dvrp >= dt_dvrp ) THEN
509	CALL data_output_dvrp
510	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
511	ENDIF
512	#if defined( __dvrp_graphics )
513	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
514	#endif
515
516	!
517	!-- If required, set the heat flux for the next time step at a random value
518	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
519
520	!
521	!-- Execute user-defined actions
522	CALL user_actions( 'after_timestep' )
523
524	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
525
526	ENDDO ! time loop
527
528	#if defined( __dvrp_graphics )
529	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
530	#endif
531
532	END SUBROUTINE time_integration

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