Home

Context Navigation

source: palm/trunk/SOURCE/synthetic_turbulence_generator_mod.f90 @ 2836

Last change on this file since 2836 was 2836, checked in by Giersch, 6 years ago
Bugfix in interpolation of lift and drag coefficients during initialization, default value of dt_dopr_listing is set to zero to allow header output
Property svn:keywords set to `Id`
File size: 35.9 KB

Line
1	!> @synthetic_turbulence_generator_mod.f90
2	!------------------------------------------------------------------------------!
3	! This file is part of the PALM model system.
4	!
5	! PALM is free software: you can redistribute it and/or modify it under the
6	! terms of the GNU General Public License as published by the Free Software
7	! Foundation, either version 3 of the License, or (at your option) any later
8	! version.
9	!
10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
13	!
14	! You should have received a copy of the GNU General Public License along with
15	! PALM. If not, see <http://www.gnu.org/licenses/>.
16	!
17	! Copyright 2017 Leibniz Universitaet Hannover
18	!------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! -----------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: synthetic_turbulence_generator_mod.f90 2836 2018-02-26 13:40:05Z Giersch $
27	! The variables synthetic_turbulence_generator and
28	! use_synthetic_turbulence_generator have been abbreviated + syn_turb_gen_prerun
29	! flag is used to define if module related parameters were outputted as restart
30	! data
31	!
32	! 2716 2017-12-29 16:35:59Z kanani
33	! Corrected "Former revisions" section
34	!
35	! 2696 2017-12-14 17:12:51Z kanani
36	! Change in file header (GPL part)
37	!
38	! 2669 2017-12-06 16:03:27Z raasch
39	! unit number for file containing turbulence generator data changed to 90
40	! bugfix: preprocessor directives added for MPI specific code
41	!
42	! 2576 2017-10-24 13:49:46Z Giersch
43	! Definition of a new function called stg_skip_var_list to skip module
44	! parameters during reading restart data
45	!
46	! 2563 2017-10-19 15:36:10Z Giersch
47	! stg_read_restart_data is called in stg_parin in the case of a restart run
48	!
49	! 2259 2017-06-08 09:09:11Z gronemeier
50	! Initial revision
51	!
52	!
53	!
54	! Authors:
55	! --------
56	! @author Tobias Gronemeier, Atsushi Inagaki, Micha Gryschka, Christoph Knigge
57	!
58	!
59	! Description:
60	! ------------
61	!> The module generates turbulence at the inflow boundary based on a method by
62	!> Xie and Castro (2008) utilizing a Lund rotation (Lund, 1998) and a mass-flux
63	!> correction by Kim et al. (2013).
64	!> The turbulence is correlated based on length scales in y- and z-direction and
65	!> a time scale for each velocity component. The profiles of length and time
66	!> scales, mean u, v, w, e and pt, and all components of the Reynolds stress
67	!> tensor are read from file STG_PROFILES.
68	!>
69	!> @todo test restart
70	!> enable cyclic_fill
71	!> implement turbulence generation for e and pt
72	!> @note <Enter notes on the module>
73	!> @bug Height information from input file is not used. Profiles from input
74	!> must match with current PALM grid.
75	!> Transformation of length scales to number of gridpoints does not
76	!> consider grid stretching.
77	!> In case of restart, velocity seeds differ from precursor run if a11,
78	!> a22, or a33 are zero.
79	!------------------------------------------------------------------------------!
80	MODULE synthetic_turbulence_generator_mod
81
82
83	USE arrays_3d, &
84	ONLY: mean_inflow_profiles, u, v, w
85
86	USE constants, &
87	ONLY: pi
88
89	USE control_parameters, &
90	ONLY: initializing_actions, message_string, &
91	syn_turb_gen, syn_turb_gen_prerun
92
93	USE cpulog, &
94	ONLY: cpu_log, log_point, log_point_s
95
96	USE indices, &
97	ONLY: nbgp, nzb, nzt, nyng, nysg
98
99	USE kinds
100
101	USE MPI
102
103	USE pegrid, &
104	ONLY: comm1dx, comm1dy, comm2d, id_inflow, ierr, myidx, pdims
105
106	USE transpose_indices, &
107	ONLY: nzb_x, nzt_x
108
109
110	IMPLICIT NONE
111
112	LOGICAL :: velocity_seed_initialized = .FALSE. !< true after first call of stg_main
113	LOGICAL :: use_syn_turb_gen = .FALSE. !< switch to use synthetic turbulence generator
114
115	INTEGER(iwp) :: stg_type_yz !< MPI type for full z range
116	INTEGER(iwp) :: stg_type_yz_small !< MPI type for small z range
117	INTEGER(iwp) :: merg !< maximum length scale (in gp)
118	INTEGER(iwp) :: mergp !< merg + nbgp
119
120	REAL(wp) :: mc_factor !< mass flux correction factor
121
122	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: displs !< displacement for MPI_GATHERV
123	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: recv_count !< receive count for MPI_GATHERV
124	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nuy !< length scale of u in y direction (in gp)
125	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nuz !< length scale of u in z direction (in gp)
126	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nvy !< length scale of v in y direction (in gp)
127	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nvz !< length scale of v in z direction (in gp)
128	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nwy !< length scale of w in y direction (in gp)
129	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nwz !< length scale of w in z direction (in gp)
130
131	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: seed !< seed of random number for rn-generator
132
133	REAL(wp), DIMENSION(:), ALLOCATABLE :: a11 !< coefficient for Lund rotation
134	REAL(wp), DIMENSION(:), ALLOCATABLE :: a21 !< coefficient for Lund rotation
135	REAL(wp), DIMENSION(:), ALLOCATABLE :: a22 !< coefficient for Lund rotation
136	REAL(wp), DIMENSION(:), ALLOCATABLE :: a31 !< coefficient for Lund rotation
137	REAL(wp), DIMENSION(:), ALLOCATABLE :: a32 !< coefficient for Lund rotation
138	REAL(wp), DIMENSION(:), ALLOCATABLE :: a33 !< coefficient for Lund rotation
139	REAL(wp), DIMENSION(:), ALLOCATABLE :: tu !< Lagrangian time scale of u
140	REAL(wp), DIMENSION(:), ALLOCATABLE :: tv !< Lagrangian time scale of v
141	REAL(wp), DIMENSION(:), ALLOCATABLE :: tw !< Lagrangian time scale of w
142
143	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: buy !< filter function for u in y direction
144	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: buz !< filter function for u in z direction
145	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bvy !< filter function for v in y direction
146	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bvz !< filter function for v in z direction
147	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bwy !< filter function for w in y direction
148	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bwz !< filter function for w in z direction
149	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fu !< velocity seed for u
150	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fuo !< velocity seed for u with new random number
151	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fv !< velocity seed for v
152	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fvo !< velocity seed for v with new random number
153	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fw !< velocity seed for w
154	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fwo !< velocity seed for w with new random number
155
156
157	!
158	!-- PALM interfaces:
159	!-- Input parameter checks to be done in check_parameters
160	INTERFACE stg_check_parameters
161	MODULE PROCEDURE stg_check_parameters
162	END INTERFACE stg_check_parameters
163
164	!
165	!-- Calculate filter functions
166	INTERFACE stg_filter_func
167	MODULE PROCEDURE stg_filter_func
168	END INTERFACE stg_filter_func
169
170	!
171	!-- Generate velocity seeds
172	INTERFACE stg_generate_seed_yz
173	MODULE PROCEDURE stg_generate_seed_yz
174	END INTERFACE stg_generate_seed_yz
175
176	!
177	!-- Output of information to the header file
178	INTERFACE stg_header
179	MODULE PROCEDURE stg_header
180	END INTERFACE stg_header
181
182	!
183	!-- Initialization actions
184	INTERFACE stg_init
185	MODULE PROCEDURE stg_init
186	END INTERFACE stg_init
187
188	!
189	!-- Main procedure of synth. turb. gen.
190	INTERFACE stg_main
191	MODULE PROCEDURE stg_main
192	END INTERFACE stg_main
193
194	!
195	!-- Reading of NAMELIST parameters
196	INTERFACE stg_parin
197	MODULE PROCEDURE stg_parin
198	END INTERFACE stg_parin
199
200	!
201	!-- Skipping of parameters for restart runs
202	INTERFACE stg_skip_var_list
203	MODULE PROCEDURE stg_skip_var_list
204	END INTERFACE stg_skip_var_list
205
206	!
207	!-- Reading of parameters for restart runs
208	INTERFACE stg_read_restart_data
209	MODULE PROCEDURE stg_read_restart_data
210	END INTERFACE stg_read_restart_data
211
212	!
213	!-- Writing of binary output for restart runs
214	INTERFACE stg_write_restart_data
215	MODULE PROCEDURE stg_write_restart_data
216	END INTERFACE stg_write_restart_data
217
218	SAVE
219
220	PRIVATE
221
222	!
223	!-- Public interfaces
224	PUBLIC stg_check_parameters, stg_header, stg_init, stg_main, stg_parin, &
225	stg_write_restart_data, stg_skip_var_list
226
227	!
228	!-- Public variables
229	PUBLIC use_syn_turb_gen
230
231
232	CONTAINS
233
234
235	!------------------------------------------------------------------------------!
236	! Description:
237	! ------------
238	!> Check parameters routine for synthetic turbulence generator
239	!------------------------------------------------------------------------------!
240	SUBROUTINE stg_check_parameters
241
242
243	USE control_parameters, &
244	ONLY: bc_lr, bc_ns, turbulent_inflow
245
246
247	IMPLICIT NONE
248
249	IF ( use_syn_turb_gen ) THEN
250
251	IF ( INDEX( initializing_actions, 'set_constant_profiles' ) == 0 .AND. &
252	INDEX( initializing_actions, 'read_restart_data' ) == 0 ) THEN
253	message_string = 'Using synthetic turbulence generator ' // &
254	'requires &initializing_actions = ' // &
255	'"set_constant_profiles" or "read_restart_data"'
256	CALL message( 'stg_check_parameters', 'PA0015', 1, 2, 0, 6, 0 )
257	ENDIF
258
259	IF ( bc_lr /= 'dirichlet/radiation' ) THEN
260	message_string = 'Using synthetic turbulence generator ' // &
261	'requires &bc_lr = "dirichlet/radiation"'
262	CALL message( 'stg_check_parameters', 'PA0035', 1, 2, 0, 6, 0 )
263	ENDIF
264	IF ( bc_ns /= 'cyclic' ) THEN
265	message_string = 'Using synthetic turbulence generator ' // &
266	'requires &bc_ns = "cyclic"'
267	CALL message( 'stg_check_parameters', 'PA0037', 1, 2, 0, 6, 0 )
268	ENDIF
269	IF ( turbulent_inflow ) THEN
270	message_string = 'Using synthetic turbulence generator ' // &
271	'in combination &with turbulent_inflow = .T. ' // &
272	'is not allowed'
273	CALL message( 'stg_check_parameters', 'PA0039', 1, 2, 0, 6, 0 )
274	ENDIF
275
276	ENDIF
277
278	END SUBROUTINE stg_check_parameters
279
280
281	!------------------------------------------------------------------------------!
282	! Description:
283	! ------------
284	!> Header output for synthetic turbulence generator
285	!------------------------------------------------------------------------------!
286	SUBROUTINE stg_header ( io )
287
288
289	IMPLICIT NONE
290
291	INTEGER(iwp), INTENT(IN) :: io !< Unit of the output file
292
293	!
294	!-- Write synthetic turbulence generator Header
295	WRITE( io, 1 )
296	IF ( use_syn_turb_gen ) THEN
297	WRITE( io, 2 )
298	ELSE
299	WRITE( io, 3 )
300	ENDIF
301
302	1 FORMAT (//' Synthetic turbulence generator information:'/ &
303	' ------------------------------------------'/)
304	2 FORMAT (' synthetic turbulence generator switched on')
305	3 FORMAT (' synthetic turbulence generator switched off')
306
307	END SUBROUTINE stg_header
308
309
310	!------------------------------------------------------------------------------!
311	! Description:
312	! ------------
313	!> Initialization of the synthetic turbulence generator
314	!------------------------------------------------------------------------------!
315	SUBROUTINE stg_init
316
317
318	USE arrays_3d, &
319	ONLY: u_init, v_init
320
321	USE control_parameters, &
322	ONLY: coupling_char, dz, e_init
323
324	USE grid_variables, &
325	ONLY: ddy
326
327
328	IMPLICIT NONE
329
330	#if defined( __parallel )
331	INTEGER(KIND=MPI_ADDRESS_KIND) :: extent !< extent of new MPI type
332	INTEGER(KIND=MPI_ADDRESS_KIND) :: tob=0 !< dummy variable
333	#endif
334
335	INTEGER(iwp) :: j !> loop index
336	INTEGER(iwp) :: k !< index
337	INTEGER(iwp) :: newtype !< dummy MPI type
338	INTEGER(iwp) :: realsize !< size of REAL variables
339	INTEGER(iwp) :: nseed !< dimension of random number seed
340	INTEGER(iwp) :: startseed = 1234567890 !< start seed for random number generator
341
342	!
343	!-- Dummy variables used for reading profiles
344	REAL(wp) :: d1 !< u profile
345	REAL(wp) :: d2 !< v profile
346	REAL(wp) :: d3 !< w profile
347	REAL(wp) :: d5 !< e profile
348	REAL(wp) :: d11 !< vertical interpolation for a11
349	REAL(wp) :: d21 !< vertical interpolation for a21
350	REAL(wp) :: d22 !< vertical interpolation for a22
351	REAL(wp) :: luy !< length scale for u in y direction
352	REAL(wp) :: luz !< length scale for u in z direction
353	REAL(wp) :: lvy !< length scale for v in y direction
354	REAL(wp) :: lvz !< length scale for v in z direction
355	REAL(wp) :: lwy !< length scale for w in y direction
356	REAL(wp) :: lwz !< length scale for w in z direction
357	REAL(wp) :: zz !< height
358
359	REAL(wp),DIMENSION(nzb:nzt+1) :: r11 !< Reynolds parameter
360	REAL(wp),DIMENSION(nzb:nzt+1) :: r21 !< Reynolds parameter
361	REAL(wp),DIMENSION(nzb:nzt+1) :: r22 !< Reynolds parameter
362	REAL(wp),DIMENSION(nzb:nzt+1) :: r31 !< Reynolds parameter
363	REAL(wp),DIMENSION(nzb:nzt+1) :: r32 !< Reynolds parameter
364	REAL(wp),DIMENSION(nzb:nzt+1) :: r33 !< Reynolds parameter
365
366
367	#if defined( __parallel )
368	CALL MPI_BARRIER( comm2d, ierr )
369	#endif
370
371	CALL cpu_log( log_point(57), 'synthetic_turbulence_gen', 'start' )
372
373	IF ( .NOT. ALLOCATED( mean_inflow_profiles ) ) &
374	ALLOCATE( mean_inflow_profiles(nzb:nzt+1,5) )
375
376	ALLOCATE ( a11(nzb:nzt+1), a21(nzb:nzt+1), a22(nzb:nzt+1), &
377	a31(nzb:nzt+1), a32(nzb:nzt+1), a33(nzb:nzt+1), &
378	nuy(nzb:nzt+1), nuz(nzb:nzt+1), nvy(nzb:nzt+1), &
379	nvz(nzb:nzt+1), nwy(nzb:nzt+1), nwz(nzb:nzt+1), &
380	tu(nzb:nzt+1), tv(nzb:nzt+1), tw(nzb:nzt+1) )
381
382	#if defined( __parallel )
383	!
384	!-- Define MPI type used in stg_generate_seed_yz to gather vertical splitted
385	!-- velocity seeds
386	CALL MPI_TYPE_SIZE( MPI_REAL, realsize, ierr )
387	extent = 1 * realsize
388
389	! stg_type_yz: yz-slice with vertical bounds nzb:nzt+1
390	CALL MPI_TYPE_CREATE_SUBARRAY( 2, [nzt-nzb+2,nyng-nysg+1], &
391	[1,nyng-nysg+1], [0,0], MPI_ORDER_FORTRAN, MPI_REAL, newtype, ierr )
392	CALL MPI_TYPE_CREATE_RESIZED( newtype, tob, extent, stg_type_yz, ierr )
393	CALL MPI_TYPE_COMMIT( stg_type_yz, ierr )
394	CALL MPI_TYPE_FREE( newtype, ierr )
395
396	! stg_type_yz_small: yz-slice with vertical bounds nzb_x:nzt_x+1
397	CALL MPI_TYPE_CREATE_SUBARRAY( 2, [nzt_x-nzb_x+2,nyng-nysg+1], &
398	[1,nyng-nysg+1], [0,0], MPI_ORDER_FORTRAN, MPI_REAL, newtype, ierr )
399	CALL MPI_TYPE_CREATE_RESIZED( newtype, tob, extent, stg_type_yz_small, ierr )
400	CALL MPI_TYPE_COMMIT( stg_type_yz_small, ierr )
401	CALL MPI_TYPE_FREE( newtype, ierr )
402
403	! receive count and displacement for MPI_GATHERV in stg_generate_seed_yz
404	ALLOCATE( recv_count(pdims(1)), displs(pdims(1)) )
405
406	recv_count = nzt_x-nzb_x + 1
407	recv_count(pdims(1)) = recv_count(pdims(1)) + 1
408
409	DO j = 1, pdims(1)
410	displs(j) = 0 + (nzt_x-nzb_x+1) * (j-1)
411	ENDDO
412	#endif
413
414	!
415	!-- Define seed of random number
416	CALL RANDOM_SEED()
417	CALL RANDOM_SEED( size=nseed )
418	ALLOCATE( seed(1:nseed) )
419	DO j = 1, nseed
420	seed(j) = startseed + j
421	ENDDO
422	CALL RANDOM_SEED(put=seed)
423
424	!
425	!-- Read inflow profile
426	!-- Height levels of profiles in input profile is as follows:
427	!-- zu: luy, luz, tu, lvy, lvz, tv, r11, r21, r22, d1, d2, d5
428	!-- zw: lwy, lwz, tw, r31, r32, r33, d3
429	!-- WARNING: zz is not used at the moment
430	OPEN( 90, FILE='STG_PROFILES'//TRIM( coupling_char ), STATUS='OLD', &
431	FORM='FORMATTED')
432
433	! Skip header
434	READ( 90, * )
435
436	DO k = nzb, nzt+1
437	READ( 90, * ) zz, luy, luz, tu(k), lvy, lvz, tv(k), lwy, lwz, tw(k), &
438	r11(k), r21(k), r22(k), r31(k), r32(k), r33(k), &
439	d1, d2, d3, d5
440
441	!
442	!-- Convert length scales from meter to number of grid points
443	nuy(k) = INT( luy * ddy )
444	nuz(k) = INT( luz / dz )
445	nvy(k) = INT( lvy * ddy )
446	nvz(k) = INT( lvz / dz )
447	nwy(k) = INT( lwy * ddy )
448	nwz(k) = INT( lwz / dz )
449
450	!
451	!-- Save Mean inflow profiles
452	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
453	mean_inflow_profiles(k,1) = d1
454	mean_inflow_profiles(k,2) = d2
455	! mean_inflow_profiles(k,4) = d4
456	mean_inflow_profiles(k,5) = d5
457	ENDIF
458	ENDDO
459
460	CLOSE( 90 )
461
462	!
463	!-- Assign initial profiles
464	u_init = mean_inflow_profiles(:,1)
465	v_init = mean_inflow_profiles(:,2)
466	! pt_init = mean_inflow_profiles(:,4)
467	e_init = MAXVAL( mean_inflow_profiles(:,5) )
468
469	!
470	!-- Calculate coefficient matrix from Reynolds stress tensor (Lund rotation)
471	DO k = nzb, nzt+1
472	IF ( r11(k) > 0.0_wp ) THEN
473	a11(k) = SQRT( r11(k) )
474	a21(k) = r21(k) / a11(k)
475	ELSE
476	a11(k) = 0.0_wp
477	a21(k) = 0.0_wp
478	ENDIF
479
480	a22(k) = r22(k) - a21(k)**2
481	IF ( a22(k) > 0.0_wp ) THEN
482	a22(k) = SQRT( a22(k) )
483	a32(k) = ( r32(k) - a21(k) * a31(k) ) / a22(k)
484	ELSE
485	a22(k) = 0.0_wp
486	a32(k) = 0.0_wp
487	ENDIF
488
489	!
490	!-- a31, a32, a33 must be calculated with interpolated a11, a21, a22 (d11,
491	!-- d21, d22) because of different vertical grid
492	IF ( k .le. nzt ) THEN
493	d11 = 0.5_wp * ( r11(k) + r11(k+1) )
494	IF ( d11 > 0.0_wp ) THEN
495	d11 = SQRT( d11 )
496	d21 = ( 0.5_wp * ( r21(k) + r21(k+1) ) ) / d11
497	a31(k) = r31(k) / d11
498	ELSE
499	d21 = 0.0_wp
500	a31(k) = 0.0_wp
501	ENDIF
502
503	d22 = 0.5_wp * ( r22(k) + r22(k+1) ) - d21 ** 2
504	IF ( d22 > 0.0_wp ) THEN
505	a32(k) = ( r32(k) - d21 * a31(k) ) / SQRT( d22 )
506	ELSE
507	a32(k) = 0.0_wp
508	ENDIF
509
510	a33(k) = r33(k) - a31(k) 2 - a32(k) 2
511	IF ( a33(k) > 0.0_wp ) THEN
512	a33(k) = SQRT( a33(k) )
513	ELSE
514	a33(k) = 0.0_wp
515	ENDIF
516	ELSE
517	a31(k) = a31(k-1)
518	a32(k) = a32(k-1)
519	a33(k) = a33(k-1)
520	ENDIF
521
522	ENDDO
523
524	!
525	!-- Define the size of the filter functions and allocate them.
526	merg = 0
527
528	! arrays must be large enough to cover the largest length scale
529	DO k = nzb, nzt+1
530	j = MAX( ABS(nuy(k)), ABS(nuz(k)), &
531	ABS(nvy(k)), ABS(nvz(k)), &
532	ABS(nwy(k)), ABS(nwz(k)) )
533	IF ( j > merg ) merg = j
534	ENDDO
535
536	merg = 2 * merg
537	mergp = merg + nbgp
538
539	ALLOCATE ( buy(-merg:merg,nzb:nzt+1), buz(-merg:merg,nzb:nzt+1), &
540	bvy(-merg:merg,nzb:nzt+1), bvz(-merg:merg,nzb:nzt+1), &
541	bwy(-merg:merg,nzb:nzt+1), bwz(-merg:merg,nzb:nzt+1) )
542
543	!
544	!-- Allocate velocity seeds
545	ALLOCATE ( fu( nzb:nzt+1,nysg:nyng), fuo(nzb:nzt+1,nysg:nyng), &
546	fv( nzb:nzt+1,nysg:nyng), fvo(nzb:nzt+1,nysg:nyng), &
547	fw( nzb:nzt+1,nysg:nyng), fwo(nzb:nzt+1,nysg:nyng) )
548
549	fu = 0._wp
550	fuo = 0._wp
551	fv = 0._wp
552	fvo = 0._wp
553	fw = 0._wp
554	fwo = 0._wp
555
556	!
557	!-- Create filter functions
558	CALL stg_filter_func( nuy, buy ) !filter uy
559	CALL stg_filter_func( nuz, buz ) !filter uz
560	CALL stg_filter_func( nvy, bvy ) !filter vy
561	CALL stg_filter_func( nvz, bvz ) !filter vz
562	CALL stg_filter_func( nwy, bwy ) !filter wy
563	CALL stg_filter_func( nwz, bwz ) !filter wz
564
565	#if defined( __parallel )
566	CALL MPI_BARRIER( comm2d, ierr )
567	#endif
568
569	!
570	!-- In case of restart, calculate velocity seeds fu, fv, fw from former
571	! time step.
572	! Bug: fu, fv, fw are different in those heights where a11, a22, a33
573	! are 0 compared to the prerun. This is mostly for k=nzt+1.
574	IF ( TRIM( initializing_actions ) == 'read_restart_data' ) THEN
575	IF ( myidx == id_inflow ) THEN
576	DO j = nysg, nyng
577	DO k = nzb, nzt+1
578
579	IF ( a11(k) .NE. 0._wp ) THEN
580	fu(k,j) = ( u(k,j,-1) / mc_factor - &
581	mean_inflow_profiles(k,1) ) / a11(k)
582	ELSE
583	fu(k,j) = 0._wp
584	ENDIF
585
586	IF ( a22(k) .NE. 0._wp ) THEN
587	fv(k,j) = ( v(k,j,-1) / mc_factor - a21(k) * fu(k,j) - &
588	mean_inflow_profiles(k,2) ) / a22(k)
589	ELSE
590	fv(k,j) = 0._wp
591	ENDIF
592
593	IF ( a33(k) .NE. 0._wp ) THEN
594	fw(k,j) = ( w(k,j,-1) / mc_factor - a31(k) * fu(k,j) - &
595	a32(k) * fv(k,j) ) / a33(k)
596	ELSE
597	fw = 0._wp
598	ENDIF
599
600	ENDDO
601	ENDDO
602	ENDIF
603	ENDIF
604
605	CALL cpu_log( log_point(57), 'synthetic_turbulence_gen', 'stop' )
606
607	END SUBROUTINE stg_init
608
609
610	!------------------------------------------------------------------------------!
611	! Description:
612	! ------------
613	!> Calculate filter function bxx from length scale nxx following Eg.9 and 10
614	!> (Xie and Castro, 2008)
615	!------------------------------------------------------------------------------!
616	SUBROUTINE stg_filter_func( nxx, bxx )
617
618
619	IMPLICIT NONE
620
621	INTEGER(iwp) :: k !< loop index
622	INTEGER(iwp) :: n_k !< length scale nXX in height k
623	INTEGER(iwp) :: n_k2 !< n_k * 2
624	INTEGER(iwp) :: nf !< index for length scales
625
626	REAL(wp) :: bdenom !< denominator for filter functions bXX
627	REAL(wp) :: qsi = 1.0_wp !< minimization factor
628
629	INTEGER(iwp), DIMENSION(:) :: nxx(nzb:nzt+1) !< length scale (in gp)
630
631	REAL(wp), DIMENSION(:,:) :: bxx(-merg:merg,nzb:nzt+1) !< filter function
632
633
634	bxx = 0.0_wp
635
636	DO k = nzb, nzt+1
637	bdenom = 0.0_wp
638	n_k = nxx(k)
639	IF ( n_k /= 0 ) THEN
640	n_k2 = n_k * 2
641
642	!
643	!-- ( Eq.10 )^2
644	DO nf = -n_k2, n_k2
645	bdenom = bdenom + EXP( -qsi * pi * ABS(nf) / n_k )**2
646	ENDDO
647
648	!
649	!-- ( Eq.9 )
650	bdenom = SQRT( bdenom )
651	DO nf = -n_k2, n_k2
652	bxx(nf,k) = EXP( -qsi * pi * ABS(nf) / n_k ) / bdenom
653	ENDDO
654	ENDIF
655	ENDDO
656
657	END SUBROUTINE stg_filter_func
658
659
660	!------------------------------------------------------------------------------!
661	! Description:
662	! ------------
663	!> Parin for &stg_par for synthetic turbulence generator
664	!------------------------------------------------------------------------------!
665	SUBROUTINE stg_parin
666
667
668	IMPLICIT NONE
669
670	CHARACTER (LEN=80) :: line !< dummy string that contains the current line of the parameter file
671
672
673	NAMELIST /stg_par/ use_syn_turb_gen
674
675	line = ' '
676
677	!
678	!-- Try to find stg package
679	REWIND ( 11 )
680	line = ' '
681	DO WHILE ( INDEX( line, '&stg_par' ) == 0 )
682	READ ( 11, '(A)', END=10 ) line
683	ENDDO
684	BACKSPACE ( 11 )
685
686	!
687	!-- Read namelist
688	READ ( 11, stg_par )
689
690	!
691	!-- Set flag that indicates that the synthetic turbulence generator is switched
692	!-- on
693	syn_turb_gen = .TRUE.
694
695	IF ( TRIM( initializing_actions ) == 'read_restart_data' ) THEN
696	CALL stg_read_restart_data
697	ENDIF
698
699	10 CONTINUE
700
701	END SUBROUTINE stg_parin
702
703
704	!------------------------------------------------------------------------------!
705	! Description:
706	! ------------
707	!> Skipping the stg variables from restart-file (binary format).
708	!------------------------------------------------------------------------------!
709	SUBROUTINE stg_skip_var_list
710
711	IMPLICIT NONE
712
713	CHARACTER (LEN=1) :: cdum
714	CHARACTER (LEN=30) :: variable_chr
715
716	READ ( 13 ) variable_chr
717
718	DO WHILE ( TRIM( variable_chr ) /= '* end stg module *' )
719
720	READ ( 13 ) cdum
721	READ ( 13 ) variable_chr
722
723	ENDDO
724
725	END SUBROUTINE stg_skip_var_list
726
727
728	!------------------------------------------------------------------------------!
729	! Description:
730	! ------------
731	!> This routine reads the respective restart data.
732	!------------------------------------------------------------------------------!
733	SUBROUTINE stg_read_restart_data
734
735
736	IMPLICIT NONE
737
738	CHARACTER (LEN=30) :: variable_chr !< dummy variable to read string
739
740
741	READ ( 13 ) variable_chr
742	DO WHILE ( TRIM( variable_chr ) /= '* end stg module *' )
743
744	SELECT CASE ( TRIM( variable_chr ) )
745
746	CASE ( 'use_syn_turb_gen' )
747	READ ( 13 ) use_syn_turb_gen
748	CASE ( 'mc_factor' )
749	READ ( 13 ) mc_factor
750	CASE ( 'syn_turb_gen_prerun' )
751	READ ( 13 ) syn_turb_gen_prerun
752
753	END SELECT
754
755	READ ( 13 ) variable_chr
756
757	ENDDO
758
759	END SUBROUTINE stg_read_restart_data
760
761
762	!------------------------------------------------------------------------------!
763	! Description:
764	! ------------
765	!> This routine writes the respective restart data.
766	!------------------------------------------------------------------------------!
767	SUBROUTINE stg_write_restart_data
768
769
770	IMPLICIT NONE
771
772	syn_turb_gen_prerun = .TRUE.
773
774	WRITE ( 14 ) 'use_syn_turb_gen '
775	WRITE ( 14 ) use_syn_turb_gen
776	WRITE ( 14 ) 'mc_factor '
777	WRITE ( 14 ) mc_factor
778	WRITE ( 14 ) 'syn_turb_gen_prerun '
779	WRITE ( 14 ) syn_turb_gen_prerun
780
781	WRITE ( 14 ) '* end stg module * '
782
783	END SUBROUTINE stg_write_restart_data
784
785
786	!------------------------------------------------------------------------------!
787	! Description:
788	! ------------
789	!> Create turbulent inflow fields for u, v, w with prescribed length scales and
790	!> Reynolds stress tensor after a method of Xie and Castro (2008), modified
791	!> following suggestions of Kim et al. (2013), and using a Lund rotation
792	!> (Lund, 1998).
793	!------------------------------------------------------------------------------!
794	SUBROUTINE stg_main
795
796
797	USE arrays_3d, &
798	ONLY: dzw
799
800	USE control_parameters, &
801	ONLY: dt_3d, intermediate_timestep_count, simulated_time, &
802	volume_flow_initial
803
804	USE indices, &
805	ONLY: nyn, nys
806
807	USE statistics, &
808	ONLY: weight_substep
809
810
811	IMPLICIT NONE
812
813	INTEGER(iwp) :: j !< loop index in y-direction
814	INTEGER(iwp) :: k !< loop index in z-direction
815
816	REAL(wp) :: dt_stg !< wheighted subtimestep
817	REAL(wp) :: mc_factor_l !< local mass flux correction factor
818
819	REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,5,nbgp) :: inflow_dist !< disturbance for inflow profiles
820
821
822	CALL cpu_log( log_point(57), 'synthetic_turbulence_gen', 'start' )
823
824	!
825	!-- Calculate time step which is needed for filter functions
826	dt_stg = dt_3d * weight_substep(intermediate_timestep_count)
827
828	!
829	!-- Initial value of fu, fv, fw
830	IF ( simulated_time == 0.0_wp .AND. .NOT. velocity_seed_initialized ) THEN
831	CALL stg_generate_seed_yz( nuy, nuz, buy, buz, fu )
832	CALL stg_generate_seed_yz( nvy, nvz, bvy, bvz, fv )
833	CALL stg_generate_seed_yz( nwy, nwz, bwy, bwz, fw )
834	velocity_seed_initialized = .TRUE.
835	ENDIF
836	!
837	!-- New set of fu, fv, fw
838	CALL stg_generate_seed_yz( nuy, nuz, buy, buz, fuo )
839	CALL stg_generate_seed_yz( nvy, nvz, bvy, bvz, fvo )
840	CALL stg_generate_seed_yz( nwy, nwz, bwy, bwz, fwo )
841
842	IF ( myidx == id_inflow ) THEN
843
844	DO j = nysg, nyng
845	DO k = nzb, nzt + 1
846	!
847	!-- Update fu, fv, fw following Eq. 14 of Xie and Castro (2008)
848	IF ( tu(k) == 0.0_wp ) THEN
849	fu(k,j) = fuo(k,j)
850	ELSE
851	fu(k,j) = fu(k,j) * EXP( -pi * dt_stg * 0.5_wp / tu(k) ) + &
852	fuo(k,j) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tu(k) ) )
853	ENDIF
854
855	IF ( tv(k) == 0.0_wp ) THEN
856	fv(k,j) = fvo(k,j)
857	ELSE
858	fv(k,j) = fv(k,j) * EXP( -pi * dt_stg * 0.5_wp / tv(k) ) + &
859	fvo(k,j) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tv(k) ) )
860	ENDIF
861
862	IF ( tw(k) == 0.0_wp ) THEN
863	fw(k,j) = fwo(k,j)
864	ELSE
865	fw(k,j) = fw(k,j) * EXP( -pi * dt_stg * 0.5_wp / tw(k) ) + &
866	fwo(k,j) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tw(k) ) )
867	ENDIF
868	!
869	!-- Lund rotation following Eq. 17 in Xie and Castro (2008).
870	!-- Additional factors are added to improve the variance of v and w
871	IF( k == 0 ) THEN
872	inflow_dist(k,j,1,1) = 0.0_wp
873	inflow_dist(k,j,2,1) = 0.0_wp
874	inflow_dist(k,j,3,1) = 0.0_wp
875	inflow_dist(k,j,4,1) = 0.0_wp
876	inflow_dist(k,j,5,1) = 0.0_wp
877	ELSE
878	inflow_dist(k,j,1,1) = a11(k) * fu(k,j)
879	!experimental test of 1.2
880	inflow_dist(k,j,2,1) = ( SQRT( a22(k) / MAXVAL(a22) ) &
881	* 1.2_wp ) &
882	* ( a21(k) * fu(k,j) &
883	+ a22(k) * fv(k,j) )
884	inflow_dist(k,j,3,1) = ( SQRT(a33(k) / MAXVAL(a33) ) &
885	* 1.3_wp ) &
886	* ( a31(k) * fu(k,j) &
887	+ a32(k) * fv(k,j) &
888	+ a33(k) * fw(k,j) )
889	! Calculation for pt and e not yet implemented
890	inflow_dist(k,j,4,1) = 0.0_wp
891	inflow_dist(k,j,5,1) = 0.0_wp
892	ENDIF
893
894	ENDDO
895	ENDDO
896
897	!
898	!-- Mass flux correction following Kim et al. (2013)
899	!-- This correction factor insures that the mass flux is preserved at the
900	!-- inflow boundary
901	mc_factor_l = 0.0_wp
902	mc_factor = 0.0_wp
903	DO j = nys, nyn
904	DO k = nzb+1, nzt
905	mc_factor_l = mc_factor_l + dzw(k) * &
906	( mean_inflow_profiles(k,1) + inflow_dist(k,j,1,1) )
907	ENDDO
908	ENDDO
909
910	#if defined( __parallel )
911	CALL MPI_ALLREDUCE( mc_factor_l, mc_factor, &
912	1, MPI_REAL, MPI_SUM, comm1dy, ierr )
913	#else
914	mc_factor = mc_factor_l
915	#endif
916
917	mc_factor = volume_flow_initial(1) / mc_factor
918
919	!
920	!-- Add disturbance at the inflow
921	DO j = nysg, nyng
922	DO k = nzb, nzt+1
923	u(k,j,-nbgp+1:0) = ( mean_inflow_profiles(k,1) + &
924	inflow_dist(k,j,1,1) ) * mc_factor
925	v(k,j,-nbgp:-1) = ( mean_inflow_profiles(k,2) + &
926	inflow_dist(k,j,2,1) ) * mc_factor
927	w(k,j,-nbgp:-1) = inflow_dist(k,j,3,1) * mc_factor
928	ENDDO
929	ENDDO
930
931	ENDIF
932
933	CALL cpu_log( log_point(57), 'synthetic_turbulence_gen', 'stop' )
934
935	END SUBROUTINE stg_main
936
937
938	!------------------------------------------------------------------------------!
939	! Description:
940	! ------------
941	!> Generate a set of random number rand_it wich is equal on each PE
942	!> and calculate the velocity seed f_n.
943	!> f_n is splitted in vertical direction by the number of PEs in x-direction and
944	!> and each PE calculates a vertical subsection of f_n. At the the end, all
945	!> parts are collected to form the full array.
946	!------------------------------------------------------------------------------!
947	SUBROUTINE stg_generate_seed_yz( n_y, n_z, b_y, b_z, f_n )
948
949
950	USE indices, &
951	ONLY: ny
952
953
954	IMPLICIT NONE
955
956	INTEGER(iwp) :: j !< loop index in y-direction
957	INTEGER(iwp) :: jj !< loop index in y-direction
958	INTEGER(iwp) :: k !< loop index in z-direction
959	INTEGER(iwp) :: kk !< loop index in z-direction
960	INTEGER(iwp) :: send_count !< send count for MPI_GATHERV
961
962	INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_y !< length scale in y-direction
963	INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_z !< length scale in z-direction
964	INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_y2 !< n_y*2
965	INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_z2 !< n_z*2
966
967	REAL(wp) :: nyz_inv !< inverse of number of grid points in yz-slice
968	REAL(wp) :: rand_av !< average of random number
969	REAL(wp) :: rand_sigma_inv !< inverse of stdev of random number
970
971	REAL(wp), DIMENSION(-merg:merg,nzb:nzt+1) :: b_y !< filter func in y-dir
972	REAL(wp), DIMENSION(-merg:merg,nzb:nzt+1) :: b_z !< filter func in z-dir
973	REAL(wp), DIMENSION(nzb_x:nzt_x+1,nysg:nyng) :: f_n_l !< local velocity seed
974	REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng) :: f_n !< velocity seed
975	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: rand_it !< random number
976
977
978	!
979	!-- Generate random numbers using a seed generated in stg_init.
980	!-- The set of random numbers are modified to have an average of 0 and
981	!-- unit variance.
982	ALLOCATE( rand_it(nzb-mergp:nzt+1+mergp,-mergp:ny+mergp) )
983
984	rand_av = 0.0_wp
985	rand_sigma_inv = 0.0_wp
986	nyz_inv = 1.0_wp / REAL( ( nzt+1 - nzb+1 ) * ( ny+1 ), KIND=wp )
987
988	DO j = 0, ny
989	DO k = nzb, nzt+1
990	CALL RANDOM_NUMBER( rand_it(k,j) )
991	rand_av = rand_av + rand_it(k,j)
992	ENDDO
993	ENDDO
994
995	rand_av = rand_av * nyz_inv
996
997	DO j = 0, ny
998	DO k = nzb, nzt+1
999	rand_it(k,j) = rand_it(k,j) - rand_av
1000	rand_sigma_inv = rand_sigma_inv + rand_it(k,j) ** 2
1001	ENDDO
1002	ENDDO
1003
1004	rand_sigma_inv = 1.0_wp / SQRT(rand_sigma_inv * nyz_inv)
1005
1006	DO j = 0, ny
1007	DO k = nzb, nzt+1
1008	rand_it(k,j) = rand_it(k,j) * rand_sigma_inv
1009	ENDDO
1010	ENDDO
1011
1012	!
1013	!-- Periodic fill of random number in space
1014	DO j = 0, ny
1015	DO k = 1, mergp
1016	rand_it(nzb -k,j) = rand_it(nzt+2-k,j) ! bottom margin
1017	rand_it(nzt+1+k,j) = rand_it(nzb+k-1,j) ! top margin
1018	ENDDO
1019	ENDDO
1020	DO j = 1, mergp
1021	DO k = nzb-mergp, nzt+1+mergp
1022	rand_it(k, -j) = rand_it(k,ny-j+1) ! south margin
1023	rand_it(k,ny+j) = rand_it(k, j-1) ! north margin
1024	ENDDO
1025	ENDDO
1026
1027	!
1028	!-- Generate velocity seed following Eq.6 of Xie and Castro (2008)
1029	n_y2 = n_y * 2
1030	n_z2 = n_z * 2
1031	f_n_l = 0.0_wp
1032
1033	DO j = nysg, nyng
1034	DO k = nzb_x, nzt_x+1
1035	DO jj = -n_y2(k), n_y2(k)
1036	DO kk = -n_z2(k), n_z2(k)
1037	f_n_l(k,j) = f_n_l(k,j) &
1038	+ b_y(jj,k) * b_z(kk,k) * rand_it(k+kk,j+jj)
1039	ENDDO
1040	ENDDO
1041	ENDDO
1042	ENDDO
1043
1044	DEALLOCATE( rand_it )
1045
1046	!
1047	!-- Gather velocity seeds of full subdomain
1048	send_count = nzt_x - nzb_x + 1
1049	IF ( nzt_x == nzt ) send_count = send_count + 1
1050
1051	#if defined( __parallel )
1052	CALL MPI_GATHERV( f_n_l(nzb_x,nysg), send_count, stg_type_yz_small, &
1053	f_n(nzb+1,nysg), recv_count, displs, stg_type_yz, &
1054	id_inflow, comm1dx, ierr )
1055	#else
1056	f_n(nzb+1:nzt+1,nysg:nyng) = f_n_l(nzb_x:nzt_x+1,nysg:nyng)
1057	#endif
1058
1059
1060	END SUBROUTINE stg_generate_seed_yz
1061
1062	END MODULE synthetic_turbulence_generator_mod

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

Download in other formats:

| Impressum | ©Leibniz Universität Hannover |