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source: palm/trunk/SOURCE/time_integration.f90 @ 106

Last change on this file since 106 was 106, checked in by raasch, 17 years ago
preliminary update of bugfixes and extensions for non-cyclic BCs
Property svn:keywords set to `Id`
File size: 17.4 KB

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

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