source: palm/trunk/SOURCE/init_pt_anomaly.f90 @ 1834

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[1682]1!> @file init_pt_anomaly.f90
[1036]2!--------------------------------------------------------------------------------!
3! This file is part of PALM.
4!
5! PALM is free software: you can redistribute it and/or modify it under the terms
6! of the GNU General Public License as published by the Free Software Foundation,
7! either version 3 of the License, or (at your option) any later version.
8!
9! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
10! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11! A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
12!
13! You should have received a copy of the GNU General Public License along with
14! PALM. If not, see <http://www.gnu.org/licenses/>.
15!
[1818]16! Copyright 1997-2016 Leibniz Universitaet Hannover
[1036]17!--------------------------------------------------------------------------------!
18!
[484]19! Current revisions:
[1]20! -----------------
[1354]21!
[1683]22!
[1321]23! Former revisions:
24! -----------------
25! $Id: init_pt_anomaly.f90 1818 2016-04-06 15:53:27Z raasch $
26!
[1683]27! 1682 2015-10-07 23:56:08Z knoop
28! Code annotations made doxygen readable
29!
[1354]30! 1353 2014-04-08 15:21:23Z heinze
31! REAL constants provided with KIND-attribute
32!
[1323]33! 1322 2014-03-20 16:38:49Z raasch
34! REAL constants defined as wp_kind
35!
[1321]36! 1320 2014-03-20 08:40:49Z raasch
[1320]37! ONLY-attribute added to USE-statements,
38! kind-parameters added to all INTEGER and REAL declaration statements,
39! kinds are defined in new module kinds,
40! revision history before 2012 removed,
41! comment fields (!:) to be used for variable explanations added to
42! all variable declaration statements
[1]43!
[1037]44! 1036 2012-10-22 13:43:42Z raasch
45! code put under GPL (PALM 3.9)
46!
[863]47! 861 2012-03-26 14:18:34Z suehring
48! Modification of the amplitude to obtain a visible temperature perturbation.
49!
[1]50! Revision 1.1  1997/08/29 08:58:56  raasch
51! Initial revision
52!
53!
54! Description:
55! ------------
[1682]56!> Impose a temperature perturbation for an advection test.
[1]57!------------------------------------------------------------------------------!
[1682]58 SUBROUTINE init_pt_anomaly
59 
[1]60
[1320]61    USE arrays_3d,                                                             &
62        ONLY:  pt, zu
[1]63
[1320]64    USE grid_variables,                                                        &
65        ONLY:  dx, dy
66
67    USE indices,                                                               &
68        ONLY:  nbgp, nx, nxl, nxr, nyn, nys, nzb, nzt
69       
70    USE kinds
71
[1]72    IMPLICIT NONE
73
[1682]74    INTEGER(iwp) ::  i  !<
75    INTEGER(iwp) ::  ic !<
76    INTEGER(iwp) ::  j  !<
77    INTEGER(iwp) ::  jc !<
78    INTEGER(iwp) ::  k  !<
79    INTEGER(iwp) ::  kc !<
[1320]80   
[1682]81    REAL(wp)     ::  betrag !<
82    REAL(wp)     ::  radius !<
83    REAL(wp)     ::  rc     !<
84    REAL(wp)     ::  x      !<
85    REAL(wp)     ::  y      !<
86    REAL(wp)     ::  z      !<
[1320]87   
[1]88!
89!-- Defaults: radius rc, strength z,
90!--           position of centre: ic, jc, kc
[1353]91    rc =  10.0_wp * dx
[1]92    ic =  ( nx+1 ) / 2
93    jc =  ic
[1353]94    kc =  nzt / 2
[1]95
96!
97!-- Compute the perturbation.
98    DO  i = nxl, nxr
99       DO  j = nys, nyn
[19]100          DO  k = nzb+1, nzt
[1]101             x = ( i - ic ) * dx
102             y = ( j - jc ) * dy
103             z = ABS( zu(k) - zu(kc) )
104             radius = SQRT( x**2 + y**2 + z**2 )
105             IF ( radius <= rc )  THEN
[1353]106                betrag = 5.0_wp * EXP( -( radius * 0.001_wp / 2.0_wp )**2 )
[1]107             ELSE
[1353]108                betrag = 0.0_wp
[1]109             ENDIF
110
111             pt(k,j,i) = pt(k,j,i) + betrag
112
113          ENDDO
114       ENDDO
115    ENDDO
116
117!
118!-- Exchange of boundary values for temperature
[667]119    CALL exchange_horiz( pt, nbgp )
[1]120
121
122 END SUBROUTINE init_pt_anomaly
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