source: palm/trunk/SOURCE/disturb_heatflux.f90 @ 3

Last change on this file since 3 was 3, checked in by raasch, 15 years ago

RCS Log replace by Id keyword, revision history cleaned up

File size: 1.9 KB
Line 
1 SUBROUTINE disturb_heatflux
2
3!------------------------------------------------------------------------------!
4! Actual revisions:
5! -----------------
6!
7!
8! Former revisions:
9! -----------------
10! $Id$
11! RCS Log replace by Id keyword, revision history cleaned up
12!
13! Revision 1.7  2006/08/04 14:35:07  raasch
14! Additional parameter in function random_gauss which limits the range of the
15! created random numbers, izuf renamed iran
16!
17! Revision 1.1  1998/03/25 20:03:47  raasch
18! Initial revision
19!
20!
21! Description:
22! ------------
23! Generate random, normally distributed heatflux values and store them as the
24! near-surface heatflux.
25! On parallel computers, too, this random generator is called at all grid points
26! of the total array in order to guarantee the same random distribution of the
27! total array regardless of the number of processors used during the model run.
28!------------------------------------------------------------------------------!
29
30    USE arrays_3d
31    USE control_parameters
32    USE cpulog
33    USE grid_variables
34    USE indices
35    USE interfaces
36
37    IMPLICIT NONE
38
39    INTEGER ::  i, j
40    REAL    ::  random_gauss, randomnumber
41
42
43    CALL cpu_log( log_point(23), 'disturb_heatflux', 'start' )
44
45!
46!-- Generate random disturbances and store them
47    DO  i = 0, nx
48       DO  j = 0, ny
49          randomnumber = random_gauss( iran, 5.0 )
50          IF ( nxl <= i  .AND.  nxr >= i  .AND.  nys <= j  .AND.  nyn >= j ) &
51          THEN
52             IF ( nzb_s_inner(j,i) == 0 )  THEN
53                shf(j,i) = randomnumber * surface_heatflux
54!
55!--             Over topography surface_heatflux is replaced by wall_heatflux(0)
56                shf(j,i) = randomnumber * wall_heatflux(0)
57             ELSE
58             ENDIF
59          ENDIF
60       ENDDO
61    ENDDO
62
63!
64!-- Exchange lateral boundary conditions for the heatflux array
65    CALL exchange_horiz_2d( shf )
66
67    CALL cpu_log( log_point(23), 'disturb_heatflux', 'stop' )
68
69
70 END SUBROUTINE disturb_heatflux
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