source: palm/trunk/SOURCE/timestep_scheme_steering.f90 @ 2718

Last change on this file since 2718 was 2718, checked in by maronga, 3 years ago

deleting of deprecated files; headers updated where needed

  • Property svn:keywords set to Id
File size: 3.1 KB
Line 
1!> @file timestep_scheme_steering.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 1997-2018 Leibniz Universitaet Hannover
18!------------------------------------------------------------------------------!
19!
20! Current revisions:
21! ------------------
22!
23!
24! Former revisions:
25! -----------------
26! $Id: timestep_scheme_steering.f90 2718 2018-01-02 08:49:38Z maronga $
27! Corrected "Former revisions" section
28!
29! 2696 2017-12-14 17:12:51Z kanani
30! Change in file header (GPL part)
31!
32! 2101 2017-01-05 16:42:31Z suehring
33!
34! 2000 2016-08-20 18:09:15Z knoop
35! Forced header and separation lines into 80 columns
36!
37! 1682 2015-10-07 23:56:08Z knoop
38! Code annotations made doxygen readable
39!
40! 1322 2014-03-20 16:38:49Z raasch
41! REAL constants defined as wp-kind
42!
43! 1320 2014-03-20 08:40:49Z raasch
44! ONLY-attribute added to USE-statements
45!
46! 1036 2012-10-22 13:43:42Z raasch
47! code put under GPL (PALM 3.9)
48!
49! 1001 2012-09-13 14:08:46Z raasch
50! all actions concerning leapfrog scheme removed
51!
52! Revision 1.1  2004/01/28 15:34:47  raasch
53! Initial revision
54!
55!
56! Description:
57! ------------
58!> Depending on the timestep scheme set the steering factors for the prognostic
59!> equations.
60!------------------------------------------------------------------------------!
61 SUBROUTINE timestep_scheme_steering
62 
63
64    USE control_parameters,                                                    &
65        ONLY:  intermediate_timestep_count, timestep_scheme, tsc
66
67    USE kinds
68
69    IMPLICIT NONE
70
71
72    IF ( timestep_scheme(1:5) == 'runge' )  THEN
73!
74!--    Runge-Kutta schemes (here the factors depend on the respective
75!--    intermediate step)
76       IF ( timestep_scheme == 'runge-kutta-2' )  THEN
77          IF ( intermediate_timestep_count == 1 )  THEN
78             tsc(1:5) = (/ 1.0_wp, 1.0_wp,  0.0_wp, 0.0_wp, 0.0_wp /)
79          ELSE
80             tsc(1:5) = (/ 1.0_wp, 0.5_wp, -0.5_wp, 0.0_wp, 1.0_wp /)
81          ENDIF
82       ELSE
83          IF ( intermediate_timestep_count == 1 )  THEN
84             tsc(1:5) = (/ 1.0_wp,  1.0_wp /  3.0_wp,           0.0_wp, 0.0_wp, 0.0_wp /)
85          ELSEIF ( intermediate_timestep_count == 2 )  THEN
86             tsc(1:5) = (/ 1.0_wp, 15.0_wp / 16.0_wp, -25.0_wp/48.0_wp, 0.0_wp, 0.0_wp /)
87          ELSE
88             tsc(1:5) = (/ 1.0_wp,  8.0_wp / 15.0_wp,   1.0_wp/15.0_wp, 0.0_wp, 1.0_wp /)
89          ENDIF         
90       ENDIF
91
92    ELSEIF ( timestep_scheme == 'euler' )  THEN
93!
94!--    Euler scheme
95       tsc(1:5) = (/ 1.0_wp, 1.0_wp, 0.0_wp, 0.0_wp, 1.0_wp /)
96
97    ENDIF
98
99
100 END SUBROUTINE timestep_scheme_steering
Note: See TracBrowser for help on using the repository browser.