source: palm/trunk/SOURCE/swap_timelevel.f90 @ 1054

Last change on this file since 1054 was 1054, checked in by hoffmann, 11 years ago

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1 SUBROUTINE swap_timelevel
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! Former revisions:
24! -----------------
25! $Id: swap_timelevel.f90 1054 2012-11-13 17:30:09Z hoffmann $
26!
27! 1053 2012-11-13 17:11:03Z hoffmann
28! swap of timelevels for nr, qr added
29!
30! 1036 2012-10-22 13:43:42Z raasch
31! code put under GPL (PALM 3.9)
32!
33! 1032 2012-10-21 13:03:21Z letzel
34! save memory by not allocating pt_2 in case of neutral = .T.
35!
36! 1010 2012-09-20 07:59:54Z raasch
37! cpp switch __nopointer added for pointer free version
38!
39! 1001 2012-09-13 14:08:46Z raasch
40! all actions concerning leapfrog scheme removed
41!
42! 102 2007-07-27 09:09:17Z raasch
43! swaping of uswst, vswst included
44!
45! 95 2007-06-02 16:48:38Z raasch
46! Swaping of salinity
47!
48! 75 2007-03-22 09:54:05Z raasch
49! moisture renamed humidity
50!
51! 19 2007-02-23 04:53:48Z raasch
52! Swaping of top fluxes
53!
54! RCS Log replace by Id keyword, revision history cleaned up
55!
56! Revision 1.8  2004/01/28 15:28:18  raasch
57! Swaping for Runge-Kutta schemes implemented
58!
59! Revision 1.1  2000/01/10  10:08:58  10:08:58  raasch (Siegfried Raasch)
60! Initial revision
61!
62!
63! Description:
64! ------------
65! Swap of timelevels of variables after each timestep
66!------------------------------------------------------------------------------!
67
68    USE arrays_3d
69    USE cpulog
70    USE interfaces
71    USE control_parameters
72
73    IMPLICIT NONE
74
75!
76!-- Incrementing timestep counter
77    timestep_count = timestep_count + 1
78
79!
80!-- Swap of variables
81#if defined( __nopointer )
82    CALL cpu_log( log_point(28), 'swap_timelevel (nop)', 'start' )
83
84    u  = u_p
85    v  = v_p
86    w  = w_p
87    pt = pt_p
88    IF ( .NOT. constant_diffusion )  THEN
89       e = e_p
90    ENDIF
91    IF ( ocean )  THEN
92       sa = sa_p
93    ENDIF
94    IF ( humidity  .OR.  passive_scalar )  THEN
95       q = q_p             
96       IF ( cloud_physics  .AND.  icloud_scheme == 0 )  THEN
97          qr = qr_p
98          nr = nr_p
99       ENDIF
100    ENDIF
101
102    CALL cpu_log( log_point(28), 'swap_timelevel (nop)', 'stop' )
103#else
104    CALL cpu_log( log_point(28), 'swap_timelevel', 'start' )
105
106    SELECT CASE ( MOD( timestep_count, 2 ) )
107
108       CASE ( 0 )
109
110          u  => u_1;   u_p  => u_2
111          v  => v_1;   v_p  => v_2
112          w  => w_1;   w_p  => w_2
113          IF ( .NOT. neutral )  THEN
114             pt => pt_1;  pt_p => pt_2
115          ENDIF
116          IF ( .NOT. constant_diffusion )  THEN
117             e => e_1;    e_p => e_2
118          ENDIF
119          IF ( ocean )  THEN
120             sa => sa_1;  sa_p => sa_2
121          ENDIF
122          IF ( humidity  .OR.  passive_scalar )  THEN
123             q => q_1;    q_p => q_2
124             IF ( cloud_physics  .AND.  icloud_scheme == 0 )  THEN
125                qr => qr_1;    qr_p => qr_2
126                nr => nr_1;    nr_p => nr_2
127             ENDIF
128          ENDIF
129
130
131       CASE ( 1 )
132
133          u  => u_2;   u_p  => u_1
134          v  => v_2;   v_p  => v_1
135          w  => w_2;   w_p  => w_1
136          IF ( .NOT. neutral )  THEN
137             pt => pt_2;  pt_p => pt_1
138          ENDIF
139          IF ( .NOT. constant_diffusion )  THEN
140             e => e_2;    e_p => e_1
141          ENDIF
142          IF ( ocean )  THEN
143             sa => sa_2;  sa_p => sa_1
144          ENDIF
145          IF ( humidity  .OR.  passive_scalar )  THEN
146             q => q_2;    q_p => q_1
147             IF ( cloud_physics  .AND.  icloud_scheme == 0 )  THEN
148                qr => qr_2;    qr_p => qr_1
149                nr => nr_2;    nr_p => nr_1
150             ENDIF
151          ENDIF
152
153
154    END SELECT
155
156    CALL cpu_log( log_point(28), 'swap_timelevel', 'stop' )
157#endif
158
159 END SUBROUTINE swap_timelevel
160
161
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