/[MITgcm]/MITgcm/pkg/mom_fluxform/mom_u_sidedrag.F
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revision 1.1 by adcroft, Wed Mar 28 19:51:14 2001 UTC revision 1.2 by adcroft, Tue May 29 14:01:38 2001 UTC
# Line 0  Line 1 
1    C $Header$
2    C $Name$
3    
4    #include "CPP_OPTIONS.h"
5    
6          SUBROUTINE MOM_U_SIDEDRAG(
7         I        bi,bj,k,
8         I        uFld, del2u, hFacZ,
9         O        uDragTerms,
10         I        myThid)
11          IMPLICIT NONE
12    C
13    C     Calculate side drag terms for U eqn
14    C       - is not vector invariant ...
15    C
16    
17    C     == Global variables ==
18    #include "SIZE.h"
19    #include "EEPARAMS.h"
20    #include "PARAMS.h"
21    #include "GRID.h"
22    
23    C     == Routine arguments ==
24          INTEGER bi,bj,k
25          _RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
26          _RL del2u(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
27          _RS hFacZ(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
28          _RL uDragTerms(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
29          INTEGER myThid
30    
31    C     == Local variables ==
32          INTEGER I,J
33          _RS hFacZClosedS,hFacZClosedN
34    
35    C     - Laplacian  and bi-harmonic terms
36          DO j=1-Oly,sNy+Oly-1
37           DO i=1-Olx,sNx+Olx-1
38            hFacZClosedS = _hFacW(i,j,k,bi,bj) - hFacZ(i,j)
39            hFacZClosedN = _hFacW(i,j,k,bi,bj) - hFacZ(i,j+1)
40            uDragTerms(i,j) =
41         &   -_recip_hFacW(i,j,k,bi,bj)
42         &   *recip_drF(k)*recip_rAw(i,j,bi,bj)
43         &   *( hFacZClosedS*_dxV(i, j ,bi,bj)
44         &      *_recip_dyU(i, j ,bi,bj)
45         &     +hFacZClosedN*_dxV(i,j+1,bi,bj)
46         &      *_recip_dyU(i,j+1,bi,bj) )
47         &   *drF(k)*2.*(
48    #ifdef ISOTROPIC_COS_SCALING
49         &                viscAh*uFld(i,j)*cosFacU(J,bi,bj)
50    #ifdef COSINEMETH_III
51         &               -viscA4*del2u(i,j)*sqcosFacU(J,bi,bj)
52    #else
53         &               -viscA4*del2u(i,j)*cosFacU(J,bi,bj)
54    #endif
55    #else
56         &                viscAh*uFld(i,j)
57         &               -viscA4*del2u(i,j)
58    #endif
59         &              )
60           ENDDO
61          ENDDO
62    
63          RETURN
64          END
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