1 |
dimitri |
1.5 |
C $Header: /usr/local/gcmpack/MITgcm/pkg/mom_vecinv/mom_vi_hdissip.F,v 1.4 2004/02/07 16:27:19 adcroft Exp $ |
2 |
jmc |
1.3 |
C $Name: $ |
3 |
adcroft |
1.2 |
|
4 |
|
|
#include "CPP_OPTIONS.h" |
5 |
|
|
|
6 |
|
|
SUBROUTINE MOM_VI_HDISSIP( |
7 |
|
|
I bi,bj,k, |
8 |
|
|
I hDiv,vort3,hFacZ,dStar,zStar, |
9 |
|
|
O uDissip,vDissip, |
10 |
|
|
I myThid) |
11 |
|
|
IMPLICIT NONE |
12 |
|
|
C |
13 |
|
|
C Calculate horizontal dissipation terms |
14 |
|
|
C [del^2 - del^4] (u,v) |
15 |
|
|
C |
16 |
|
|
|
17 |
|
|
C == Global variables == |
18 |
|
|
#include "SIZE.h" |
19 |
|
|
#include "GRID.h" |
20 |
|
|
#include "EEPARAMS.h" |
21 |
|
|
#include "PARAMS.h" |
22 |
|
|
|
23 |
|
|
C == Routine arguments == |
24 |
|
|
INTEGER bi,bj,k |
25 |
|
|
_RL hDiv(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
26 |
|
|
_RL vort3(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
27 |
|
|
_RS hFacZ(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
28 |
|
|
_RL dStar(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
29 |
|
|
_RL zStar(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
30 |
|
|
_RL uDissip(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
31 |
|
|
_RL vDissip(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
32 |
|
|
INTEGER myThid |
33 |
|
|
|
34 |
|
|
C == Local variables == |
35 |
|
|
INTEGER I,J |
36 |
|
|
_RL Zip,Zij,Zpj,Dim,Dij,Dmj,uD2,vD2,uD4,vD4 |
37 |
|
|
|
38 |
|
|
C - Laplacian and bi-harmonic terms |
39 |
|
|
DO j=2-Oly,sNy+Oly-1 |
40 |
|
|
DO i=2-Olx,sNx+Olx-1 |
41 |
|
|
|
42 |
|
|
c Dim=dyF( i ,j-1,bi,bj)*hFacC( i ,j-1,k,bi,bj)*hDiv( i ,j-1) |
43 |
|
|
c Dij=dyF( i , j ,bi,bj)*hFacC( i , j ,k,bi,bj)*hDiv( i , j ) |
44 |
|
|
c Dmj=dyF(i-1, j ,bi,bj)*hFacC(i-1, j ,k,bi,bj)*hDiv(i-1, j ) |
45 |
|
|
c Dim=dyF( i ,j-1,bi,bj)* hDiv( i ,j-1) |
46 |
|
|
c Dij=dyF( i , j ,bi,bj)* hDiv( i , j ) |
47 |
|
|
c Dmj=dyF(i-1, j ,bi,bj)* hDiv(i-1, j ) |
48 |
|
|
Dim= hDiv( i ,j-1) |
49 |
|
|
Dij= hDiv( i , j ) |
50 |
|
|
Dmj= hDiv(i-1, j ) |
51 |
|
|
|
52 |
|
|
c Zip=dxV( i ,j+1,bi,bj)*hFacZ( i ,j+1)*vort3( i ,j+1) |
53 |
|
|
c Zij=dxV( i , j ,bi,bj)*hFacZ( i , j )*vort3( i , j ) |
54 |
|
|
c Zpj=dxV(i+1, j ,bi,bj)*hFacZ(i+1, j )*vort3(i+1, j ) |
55 |
|
|
Zip= hFacZ( i ,j+1)*vort3( i ,j+1) |
56 |
|
|
Zij= hFacZ( i , j )*vort3( i , j ) |
57 |
|
|
Zpj= hFacZ(i+1, j )*vort3(i+1, j ) |
58 |
|
|
|
59 |
adcroft |
1.4 |
C This bit scales the harmonic dissipation operator to be proportional |
60 |
|
|
C to the grid-cell area over the time-step. viscAh is then non-dimensional |
61 |
|
|
C and should be less than 1/8, for example viscAh=0.01 |
62 |
|
|
if (viscAhGrid*deltaTmom.NE.0.) then |
63 |
|
|
Dij=Dij* |
64 |
|
|
& min(viscAh+viscAhGrid*rA ( i , j ,bi,bj)/deltaTmom,viscAhMax) |
65 |
|
|
Dim=Dim* |
66 |
|
|
& min(viscAh+viscAhGrid*rA ( i ,j-1,bi,bj)/deltaTmom,viscAhMax) |
67 |
|
|
Dmj=Dmj* |
68 |
|
|
& min(viscAh+viscAhGrid*rA (i-1, j ,bi,bj)/deltaTmom,viscAhMax) |
69 |
|
|
Zij=Zij* |
70 |
|
|
& min(viscAh+viscAhGrid*rAz( i , j ,bi,bj)/deltaTmom,viscAhMax) |
71 |
|
|
Zip=Zip* |
72 |
|
|
& min(viscAh+viscAhGrid*rAz( i ,j+1,bi,bj)/deltaTmom,viscAhMax) |
73 |
|
|
Zpj=Zpj* |
74 |
|
|
& min(viscAh+viscAhGrid*rAz(i+1, j ,bi,bj)/deltaTmom,viscAhMax) |
75 |
|
|
uD2 = ( |
76 |
|
|
& cosFacU(j,bi,bj)*( Dij-Dmj )*recip_DXC(i,j,bi,bj) |
77 |
|
|
& -recip_hFacW(i,j,k,bi,bj)*( Zip-Zij )*recip_DYG(i,j,bi,bj) ) |
78 |
|
|
vD2 = ( |
79 |
|
|
& recip_hFacS(i,j,k,bi,bj)*( Zpj-Zij )*recip_DXG(i,j,bi,bj) |
80 |
|
|
& *cosFacV(j,bi,bj) |
81 |
|
|
& +( Dij-Dim )*recip_DYC(i,j,bi,bj) ) |
82 |
|
|
else |
83 |
adcroft |
1.2 |
c uD2 = recip_rAw(i,j,bi,bj)*( |
84 |
|
|
c & recip_hFacW(i,j,k,bi,bj)*viscAh*( (Dij-Dmj)*cosFacU(j,bi,bj) ) |
85 |
|
|
c & -recip_hFacW(i,j,k,bi,bj)*viscAh*( Zip-Zij ) ) |
86 |
|
|
c uD2 = recip_rAw(i,j,bi,bj)*( |
87 |
|
|
c & viscAh*( (Dij-Dmj)*cosFacU(j,bi,bj) ) |
88 |
|
|
c & -recip_hFacW(i,j,k,bi,bj)*viscAh*( Zip-Zij ) ) |
89 |
adcroft |
1.4 |
uD2 = viscAh*( |
90 |
adcroft |
1.2 |
& cosFacU(j,bi,bj)*( Dij-Dmj )*recip_DXC(i,j,bi,bj) |
91 |
jmc |
1.3 |
& -recip_hFacW(i,j,k,bi,bj)*( Zip-Zij )*recip_DYG(i,j,bi,bj) ) |
92 |
adcroft |
1.2 |
c vD2 = recip_rAs(i,j,bi,bj)*( |
93 |
|
|
c & recip_hFacS(i,j,k,bi,bj)*viscAh*( (Zpj-Zij)*cosFacV(j,bi,bj) ) |
94 |
|
|
c & +recip_hFacS(i,j,k,bi,bj)*viscAh*( Dij-Dim ) ) |
95 |
|
|
c vD2 = recip_rAs(i,j,bi,bj)*( |
96 |
|
|
c & recip_hFacS(i,j,k,bi,bj)*viscAh*( (Zpj-Zij)*cosFacV(j,bi,bj) ) |
97 |
|
|
c & + viscAh*( Dij-Dim ) ) |
98 |
dimitri |
1.5 |
vD2 = viscAh*( |
99 |
jmc |
1.3 |
& recip_hFacS(i,j,k,bi,bj)*( Zpj-Zij )*recip_DXG(i,j,bi,bj) |
100 |
adcroft |
1.2 |
& *cosFacV(j,bi,bj) |
101 |
|
|
& +( Dij-Dim )*recip_DYC(i,j,bi,bj) ) |
102 |
adcroft |
1.4 |
endif |
103 |
adcroft |
1.2 |
|
104 |
|
|
c Dim=dyF( i ,j-1,bi,bj)*hFacC( i ,j-1,k,bi,bj)*dStar( i ,j-1) |
105 |
|
|
c Dij=dyF( i , j ,bi,bj)*hFacC( i , j ,k,bi,bj)*dStar( i , j ) |
106 |
|
|
c Dmj=dyF(i-1, j ,bi,bj)*hFacC(i-1, j ,k,bi,bj)*dStar(i-1, j ) |
107 |
|
|
Dim=dyF( i ,j-1,bi,bj)* dStar( i ,j-1) |
108 |
|
|
Dij=dyF( i , j ,bi,bj)* dStar( i , j ) |
109 |
|
|
Dmj=dyF(i-1, j ,bi,bj)* dStar(i-1, j ) |
110 |
|
|
|
111 |
|
|
Zip=dxV( i ,j+1,bi,bj)*hFacZ( i ,j+1)*zStar( i ,j+1) |
112 |
|
|
Zij=dxV( i , j ,bi,bj)*hFacZ( i , j )*zStar( i , j ) |
113 |
|
|
Zpj=dxV(i+1, j ,bi,bj)*hFacZ(i+1, j )*zStar(i+1, j ) |
114 |
|
|
|
115 |
adcroft |
1.4 |
C This bit scales the harmonic dissipation operator to be proportional |
116 |
|
|
C to the grid-cell area over the time-step. viscAh is then non-dimensional |
117 |
|
|
C and should be less than 1/8, for example viscAh=0.01 |
118 |
dimitri |
1.5 |
if (viscA4Grid*deltaTmom.NE.0.) then |
119 |
adcroft |
1.4 |
Dij = Dij * min( |
120 |
|
|
& viscA4+viscA4Grid*(rA ( i , j ,bi,bj)**2)/deltaTmom, |
121 |
|
|
& viscA4Max) |
122 |
|
|
Dim = Dim * min( |
123 |
|
|
& viscA4+viscA4Grid*(rA ( i ,j-1,bi,bj)**2)/deltaTmom, |
124 |
|
|
& viscA4Max) |
125 |
|
|
Dmj = Dmj * min( |
126 |
|
|
& viscA4+viscA4Grid*(rA (i-1, j ,bi,bj)**2)/deltaTmom, |
127 |
|
|
& viscA4Max) |
128 |
|
|
Zij = Zij * min( |
129 |
|
|
& viscA4+viscA4Grid*(rAz( i , j ,bi,bj)**2)/deltaTmom, |
130 |
|
|
& viscA4Max) |
131 |
|
|
Zip = Zip * min( |
132 |
|
|
& viscA4+viscA4Grid*(rAz( i ,j+1,bi,bj)**2)/deltaTmom, |
133 |
|
|
& viscA4Max) |
134 |
|
|
Zpj = Zpj * min( |
135 |
|
|
& viscA4+viscA4Grid*(rAz(i+1, j ,bi,bj)**2)/deltaTmom, |
136 |
|
|
& viscA4Max) |
137 |
|
|
uD4 = recip_rAw(i,j,bi,bj)*( |
138 |
|
|
& ( (Dij-Dmj)*cosFacU(j,bi,bj) ) |
139 |
|
|
& -recip_hFacW(i,j,k,bi,bj)*( Zip-Zij ) ) |
140 |
|
|
vD4 = recip_rAs(i,j,bi,bj)*( |
141 |
|
|
& recip_hFacS(i,j,k,bi,bj)*( (Zpj-Zij)*cosFacV(j,bi,bj) ) |
142 |
|
|
& + ( Dij-Dim ) ) |
143 |
|
|
else |
144 |
adcroft |
1.2 |
c uD4 = recip_rAw(i,j,bi,bj)*( |
145 |
|
|
c & recip_hFacW(i,j,k,bi,bj)*viscA4*( (Dij-Dmj)*cosFacU(j,bi,bj) ) |
146 |
|
|
c & -recip_hFacW(i,j,k,bi,bj)*viscA4*( Zip-Zij ) ) |
147 |
adcroft |
1.4 |
uD4 = recip_rAw(i,j,bi,bj)*( |
148 |
adcroft |
1.2 |
& viscA4*( (Dij-Dmj)*cosFacU(j,bi,bj) ) |
149 |
|
|
& -recip_hFacW(i,j,k,bi,bj)*viscA4*( Zip-Zij ) ) |
150 |
|
|
|
151 |
|
|
c vD4 = recip_rAs(i,j,bi,bj)*( |
152 |
|
|
c & recip_hFacS(i,j,k,bi,bj)*viscA4*( (Zpj-Zij)*cosFacV(j,bi,bj) ) |
153 |
|
|
c & +recip_hFacS(i,j,k,bi,bj)*viscA4*( Dij-Dim ) ) |
154 |
adcroft |
1.4 |
vD4 = recip_rAs(i,j,bi,bj)*( |
155 |
adcroft |
1.2 |
& recip_hFacS(i,j,k,bi,bj)*viscA4*( (Zpj-Zij)*cosFacV(j,bi,bj) ) |
156 |
|
|
& + viscA4*( Dij-Dim ) ) |
157 |
adcroft |
1.4 |
endif |
158 |
adcroft |
1.2 |
|
159 |
|
|
uDissip(i,j) = uD2 - uD4 |
160 |
|
|
vDissip(i,j) = vD2 - vD4 |
161 |
|
|
|
162 |
|
|
ENDDO |
163 |
|
|
ENDDO |
164 |
|
|
|
165 |
|
|
RETURN |
166 |
|
|
END |