source: palm/trunk/SOURCE/init_pt_anomaly.f90 @ 861

Last change on this file since 861 was 861, checked in by suehring, 9 years ago

WS5 is available in combination with topography. Version number changed from 3.8 to 3.8a. Modification in init_pt_anomaly.

  • Property svn:keywords set to Id
File size: 1.9 KB
Line 
1 SUBROUTINE init_pt_anomaly
2
3!------------------------------------------------------------------------------!
4! Current revisions:
5! -----------------
6!
7! Modification of the amplitude to obtain a visible temperature perturbation.
8!
9! Former revisions:
10! -----------------
11! $Id: init_pt_anomaly.f90 861 2012-03-26 14:18:34Z suehring $
12!
13! 667 2010-12-23 12:06:00Z suehring/gryschka
14! Call of exchange_horiz are modified.
15!
16! 75 2007-03-22 09:54:05Z raasch
17! 2nd+3rd argument removed from exchange horiz
18!
19! 19 2007-02-23 04:53:48Z raasch
20! Calculation extended for gridpoint nzt
21!
22! RCS Log replace by Id keyword, revision history cleaned up
23!
24! Revision 1.7  2005/03/26 20:36:55  raasch
25! Arguments for non-cyclic boundary conditions added to argument list of
26! routine exchange_horiz
27!
28! Revision 1.1  1997/08/29 08:58:56  raasch
29! Initial revision
30!
31!
32! Description:
33! ------------
34! Impose a temperature perturbation for an advection test.
35!------------------------------------------------------------------------------!
36
37    USE arrays_3d
38    USE constants
39    USE grid_variables
40    USE indices
41    USE control_parameters
42
43    IMPLICIT NONE
44
45    INTEGER ::  i, ic, j, jc, k, kc
46    REAL    ::  betrag, radius, rc, x, y, z
47
48!
49!-- Defaults: radius rc, strength z,
50!--           position of centre: ic, jc, kc
51    rc =  10.0 * dx
52    ic =  ( nx+1 ) / 2
53    jc =  ic
54    kc = nzt / 2
55
56!
57!-- Compute the perturbation.
58    DO  i = nxl, nxr
59       DO  j = nys, nyn
60          DO  k = nzb+1, nzt
61             x = ( i - ic ) * dx
62             y = ( j - jc ) * dy
63             z = ABS( zu(k) - zu(kc) )
64             radius = SQRT( x**2 + y**2 + z**2 )
65             IF ( radius <= rc )  THEN
66                betrag = 5.0 * EXP( -( radius * 0.001 / 2.0 )**2 )
67             ELSE
68                betrag = 0.0
69             ENDIF
70
71             pt(k,j,i) = pt(k,j,i) + betrag
72
73          ENDDO
74       ENDDO
75    ENDDO
76
77!
78!-- Exchange of boundary values for temperature
79    CALL exchange_horiz( pt, nbgp )
80
81
82 END SUBROUTINE init_pt_anomaly
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