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source: palm/trunk/SOURCE/advec_w_up.f90 @ 4239

Last change on this file since 4239 was 4182, checked in by scharf, 5 years ago
corrected "Former revisions" section minor formatting in "Former revisions" section added "Author" section
Property svn:keywords set to `Id`
File size: 7.0 KB

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1	!> @file advec_w_up.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 1997-2019 Leibniz Universitaet Hannover
18	!------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! -----------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: advec_w_up.f90 4182 2019-08-22 15:20:23Z suehring $
27	! Corrected "Former revisions" section
28	!
29	! 3655 2019-01-07 16:51:22Z knoop
30	! variables documented
31	!
32	! Revision 1.1 1997/08/29 08:56:33 raasch
33	! Initial revision
34	!
35	!
36	! Description:
37	! ------------
38	!> Advection term for the w velocity-component using upstream scheme.
39	!> NOTE: vertical advection at k=1 still has wrong grid spacing for w>0
40	!> The same problem occurs for all topography boundaries!
41	!------------------------------------------------------------------------------!
42	MODULE advec_w_up_mod
43
44
45	PRIVATE
46	PUBLIC advec_w_up
47
48	INTERFACE advec_w_up
49	MODULE PROCEDURE advec_w_up
50	MODULE PROCEDURE advec_w_up_ij
51	END INTERFACE advec_w_up
52
53	CONTAINS
54
55
56	!------------------------------------------------------------------------------!
57	! Description:
58	! ------------
59	!> Call for all grid points
60	!------------------------------------------------------------------------------!
61	SUBROUTINE advec_w_up
62
63	USE arrays_3d, &
64	ONLY: ddzw, tend, u, v, w
65
66	USE control_parameters, &
67	ONLY: u_gtrans, v_gtrans
68
69	USE grid_variables, &
70	ONLY: ddx, ddy
71
72	USE indices, &
73	ONLY: nxl, nxr, nyn, nys, nzb, nzt
74
75	USE kinds
76
77
78	IMPLICIT NONE
79
80	INTEGER(iwp) :: i !< grid index along x-direction
81	INTEGER(iwp) :: j !< grid index along y-direction
82	INTEGER(iwp) :: k !< grid index along z-direction
83
84	REAL(wp) :: ukomp !< advection velocity along x-direction
85	REAL(wp) :: vkomp !< advection velocity along y-direction
86
87
88	DO i = nxl, nxr
89	DO j = nys, nyn
90	DO k = nzb+1, nzt-1
91	!
92	!-- x-direction
93	ukomp = 0.25_wp * ( u(k,j,i) + u(k,j,i+1) + &
94	u(k+1,j,i) + u(k+1,j,i+1) ) - u_gtrans
95	IF ( ukomp > 0.0_wp ) THEN
96	tend(k,j,i) = tend(k,j,i) - ukomp * &
97	( w(k,j,i) - w(k,j,i-1) ) * ddx
98	ELSE
99	tend(k,j,i) = tend(k,j,i) - ukomp * &
100	( w(k,j,i+1) - w(k,j,i) ) * ddx
101	ENDIF
102	!
103	!-- y-direction
104	vkomp = 0.25_wp * ( v(k,j,i) + v(k,j+1,i) + &
105	v(k+1,j,i) + v(k+1,j+1,i) ) - v_gtrans
106	IF ( vkomp > 0.0_wp ) THEN
107	tend(k,j,i) = tend(k,j,i) - vkomp * &
108	( w(k,j,i) - w(k,j-1,i) ) * ddy
109	ELSE
110	tend(k,j,i) = tend(k,j,i) - vkomp * &
111	( w(k,j+1,i) - w(k,j,i) ) * ddy
112	ENDIF
113	!
114	!-- z-direction
115	IF ( w(k,j,i) > 0.0_wp ) THEN
116	tend(k,j,i) = tend(k,j,i) - w(k,j,i) * &
117	( w(k,j,i) - w(k-1,j,i) ) * ddzw(k)
118	ELSE
119	tend(k,j,i) = tend(k,j,i) - w(k,j,i) * &
120	( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1)
121	ENDIF
122
123	ENDDO
124	ENDDO
125	ENDDO
126
127	END SUBROUTINE advec_w_up
128
129
130	!------------------------------------------------------------------------------!
131	! Description:
132	! ------------
133	!> Call for grid point i,j
134	!------------------------------------------------------------------------------!
135	SUBROUTINE advec_w_up_ij( i, j )
136
137	USE arrays_3d, &
138	ONLY: ddzw, tend, u, v, w
139
140	USE control_parameters, &
141	ONLY: u_gtrans, v_gtrans
142
143	USE grid_variables, &
144	ONLY: ddx, ddy
145
146	USE indices, &
147	ONLY: nzb, nzt
148
149	USE kinds
150
151
152	IMPLICIT NONE
153
154	INTEGER(iwp) :: i !< grid index along x-direction
155	INTEGER(iwp) :: j !< grid index along y-direction
156	INTEGER(iwp) :: k !< grid index along z-direction
157
158	REAL(wp) :: ukomp !< advection velocity along x-direction
159	REAL(wp) :: vkomp !< advection velocity along y-direction
160
161
162	DO k = nzb+1, nzt-1
163	!
164	!-- x-direction
165	ukomp = 0.25_wp * ( u(k,j,i) + u(k,j,i+1) + u(k+1,j,i) + u(k+1,j,i+1) &
166	) - u_gtrans
167	IF ( ukomp > 0.0_wp ) THEN
168	tend(k,j,i) = tend(k,j,i) - ukomp * &
169	( w(k,j,i) - w(k,j,i-1) ) * ddx
170	ELSE
171	tend(k,j,i) = tend(k,j,i) - ukomp * &
172	( w(k,j,i+1) - w(k,j,i) ) * ddx
173	ENDIF
174	!
175	!-- y-direction
176	vkomp = 0.25_wp * ( v(k,j,i) + v(k,j+1,i) + v(k+1,j,i) + v(k+1,j+1,i) &
177	) - v_gtrans
178	IF ( vkomp > 0.0_wp ) THEN
179	tend(k,j,i) = tend(k,j,i) - vkomp * &
180	( w(k,j,i) - w(k,j-1,i) ) * ddy
181	ELSE
182	tend(k,j,i) = tend(k,j,i) - vkomp * &
183	( w(k,j+1,i) - w(k,j,i) ) * ddy
184	ENDIF
185	!
186	!-- z-direction
187	IF ( w(k,j,i) > 0.0_wp ) THEN
188	tend(k,j,i) = tend(k,j,i) - w(k,j,i) * &
189	( w(k,j,i) - w(k-1,j,i) ) * ddzw(k)
190	ELSE
191	tend(k,j,i) = tend(k,j,i) - w(k,j,i) * &
192	( w(k+1,j,i) - w(k,j,i) ) * ddzw(k+1)
193	ENDIF
194
195	ENDDO
196
197	END SUBROUTINE advec_w_up_ij
198
199	END MODULE advec_w_up_mod

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