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source: palm/trunk/SOURCE/time_integration.f90 @ 108

Last change on this file since 108 was 108, checked in by letzel, 17 years ago

Improved coupler: evaporation - salinity-flux coupling for humidity = .T.,

avoid MPI hangs when coupled runs terminate, add DOC/app/chapter_3.8;

Optional calculation of km and kh from initial TKE e_init;
Default initialization of km,kh = 0.00001 for ocean = .T.;
Allow data_output_pr= q, wq, w"q", w*q* for humidity = .T.;
Bugfix: Rayleigh damping for ocean fixed.

Property svn:keywords set to Id

File size: 18.4 KB

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

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