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source: palm/trunk/SOURCE/time_integration.f90 @ 48

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

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