Home

Context Navigation

source: palm/trunk/SOURCE/time_integration.f90 @ 100

Last change on this file since 100 was 98, checked in by raasch, 17 years ago
updating comments and rc-file
Property svn:keywords set to `Id`
File size: 16.8 KB

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

Note: See TracBrowser for help on using the repository browser.

Download in other formats:

| Impressum | ©Leibniz Universität Hannover |