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source: palm/trunk/SOURCE/time_integration.f90 @ 179

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

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