| 1 | SUBROUTINE timestep_scheme_steering |
|---|
| 2 | |
|---|
| 3 | !--------------------------------------------------------------------------------! |
|---|
| 4 | ! This file is part of PALM. |
|---|
| 5 | ! |
|---|
| 6 | ! PALM is free software: you can redistribute it and/or modify it under the terms |
|---|
| 7 | ! of the GNU General Public License as published by the Free Software Foundation, |
|---|
| 8 | ! either version 3 of the License, or (at your option) any later 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 1997-2012 Leibniz University Hannover |
|---|
| 18 | !--------------------------------------------------------------------------------! |
|---|
| 19 | ! |
|---|
| 20 | ! Current revisions: |
|---|
| 21 | ! ------------------ |
|---|
| 22 | ! |
|---|
| 23 | ! |
|---|
| 24 | ! Former revisions: |
|---|
| 25 | ! ----------------- |
|---|
| 26 | ! $Id: timestep_scheme_steering.f90 1037 2012-10-22 14:10:22Z hoffmann $ |
|---|
| 27 | ! |
|---|
| 28 | ! 1036 2012-10-22 13:43:42Z raasch |
|---|
| 29 | ! code put under GPL (PALM 3.9) |
|---|
| 30 | ! |
|---|
| 31 | ! 1001 2012-09-13 14:08:46Z raasch |
|---|
| 32 | ! all actions concerning leapfrog scheme removed |
|---|
| 33 | ! |
|---|
| 34 | ! 673 2011-01-18 16:19:48Z suehring |
|---|
| 35 | ! No pressure term during time integration (tsc(4)=0.0). |
|---|
| 36 | ! |
|---|
| 37 | ! RCS Log replace by Id keyword, revision history cleaned up |
|---|
| 38 | ! |
|---|
| 39 | ! Revision 1.2 2005/03/26 21:17:06 raasch |
|---|
| 40 | ! No pressure term for Runge-Kutta-schemes (tsc(4)=0.0) |
|---|
| 41 | ! |
|---|
| 42 | ! Revision 1.1 2004/01/28 15:34:47 raasch |
|---|
| 43 | ! Initial revision |
|---|
| 44 | ! |
|---|
| 45 | ! |
|---|
| 46 | ! Description: |
|---|
| 47 | ! ------------ |
|---|
| 48 | ! Depending on the timestep scheme set the steering factors for the prognostic |
|---|
| 49 | ! equations. |
|---|
| 50 | !------------------------------------------------------------------------------! |
|---|
| 51 | |
|---|
| 52 | USE control_parameters |
|---|
| 53 | |
|---|
| 54 | IMPLICIT NONE |
|---|
| 55 | |
|---|
| 56 | |
|---|
| 57 | IF ( timestep_scheme(1:5) == 'runge' ) THEN |
|---|
| 58 | ! |
|---|
| 59 | !-- Runge-Kutta schemes (here the factors depend on the respective |
|---|
| 60 | !-- intermediate step) |
|---|
| 61 | IF ( timestep_scheme == 'runge-kutta-2' ) THEN |
|---|
| 62 | IF ( intermediate_timestep_count == 1 ) THEN |
|---|
| 63 | tsc(1:5) = (/ 1.0, 1.0, 0.0, 0.0, 0.0 /) |
|---|
| 64 | ELSE |
|---|
| 65 | tsc(1:5) = (/ 1.0, 0.5, -0.5, 0.0, 1.0 /) |
|---|
| 66 | ENDIF |
|---|
| 67 | ELSE |
|---|
| 68 | IF ( intermediate_timestep_count == 1 ) THEN |
|---|
| 69 | tsc(1:5) = (/ 1.0, 1.0/3.0, 0.0, 0.0, 0.0 /) |
|---|
| 70 | ELSEIF ( intermediate_timestep_count == 2 ) THEN |
|---|
| 71 | tsc(1:5) = (/ 1.0, 15.0/16.0, -25.0/48.0, 0.0, 0.0 /) |
|---|
| 72 | ELSE |
|---|
| 73 | tsc(1:5) = (/ 1.0, 8.0/15.0, 1.0/15.0, 0.0, 1.0 /) |
|---|
| 74 | ENDIF |
|---|
| 75 | ENDIF |
|---|
| 76 | |
|---|
| 77 | ELSEIF ( timestep_scheme == 'euler' ) THEN |
|---|
| 78 | ! |
|---|
| 79 | !-- Euler scheme |
|---|
| 80 | tsc(1:5) = (/ 1.0, 1.0, 0.0, 0.0, 1.0 /) |
|---|
| 81 | |
|---|
| 82 | ENDIF |
|---|
| 83 | |
|---|
| 84 | |
|---|
| 85 | END SUBROUTINE timestep_scheme_steering |
|---|
