pkg/mom_common/mom_u_rviscflux.F

C $Header: /u/gcmpack/MITgcm/pkg/mom_common/mom_u_rviscflux.F,v 1.2 2005/06/22 00:29:02 jmc Exp $
C $Name:  $

#include "MOM_COMMON_OPTIONS.h"

CBOP
C !ROUTINE: MOM_U_RVISCFLUX

C !INTERFACE: ==========================================================
      SUBROUTINE MOM_U_RVISCFLUX(
     I        bi,bj,k,
     I        uFld, KappaRU,
     O        rViscFluxU,
     I        myThid)

C !DESCRIPTION:
C Calculates the area integrated vertical viscous fluxes of U
C  at vertical interface k (between level k & k-1):
C \begin{equation*}
C F^r = - \frac{ {\cal A}_w }{\Delta r_c} A_r \delta_k u 
C \end{equation*}

C !USES: ===============================================================
      IMPLICIT NONE
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "GRID.h"

C !INPUT PARAMETERS: ===================================================
C  bi,bj                :: tile indices
C  k                    :: vertical level
C  uFld                 :: zonal flow
C  KappaRU              :: vertical viscosity
C  myThid               :: thread number
      INTEGER bi,bj,k
      _RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
      _RL KappaRU(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
      INTEGER myThid

C !OUTPUT PARAMETERS: ==================================================
C  rViscFluxU           :: viscous fluxes
      _RL rViscFluxU(1-OLx:sNx+OLx,1-OLy:sNy+OLy)

C !LOCAL VARIABLES: ====================================================
C  i,j                  :: loop indices
      INTEGER i,j
CEOP

C     - Vertical viscous flux
      IF ( k.LE.1 .OR. k.GT.Nr ) THEN
       DO j=1-Oly,sNy+Oly
        DO i=1-Olx,sNx+Olx
          rViscFluxU(i,j) = 0. _d 0
        ENDDO
       ENDDO
      ELSE
       DO j=1-Oly,sNy+Oly-1
        DO i=1-Olx,sNx+Olx-1
          rViscFluxU(i,j) =
     &      -KappaRU(i,j,k)
     &      *rAw(i,j,bi,bj)
     &      *( uFld(i,j,k,bi,bj)-uFld(i,j,k-1,bi,bj)
     &       )*rkSign*recip_drC(k)
     &      *_maskW(i,j,k,bi,bj)
     &      *_maskW(i,j,k-1,bi,bj)
        ENDDO
       ENDDO
      ENDIF

      RETURN
      END
1	C $Header: /u/gcmpack/MITgcm/pkg/mom_common/mom_u_rviscflux.F,v 1.2 2005/06/22 00:29:02 jmc Exp $
2	C $Name: $
3
4	#include "MOM_COMMON_OPTIONS.h"
5
6	CBOP
7	C !ROUTINE: MOM_U_RVISCFLUX
8
9	C !INTERFACE: ==========================================================
10	SUBROUTINE MOM_U_RVISCFLUX(
11	I bi,bj,k,
12	I uFld, KappaRU,
13	O rViscFluxU,
14	I myThid)
15
16	C !DESCRIPTION:
17	C Calculates the area integrated vertical viscous fluxes of U
18	C at vertical interface k (between level k & k-1):
19	C \begin{equation*}
20	C F^r = - \frac{ {\cal A}_w }{\Delta r_c} A_r \delta_k u
21	C \end{equation*}
22
23	C !USES: ===============================================================
24	IMPLICIT NONE
25	#include "SIZE.h"
26	#include "EEPARAMS.h"
27	#include "PARAMS.h"
28	#include "GRID.h"
29
30	C !INPUT PARAMETERS: ===================================================
31	C bi,bj :: tile indices
32	C k :: vertical level
33	C uFld :: zonal flow
34	C KappaRU :: vertical viscosity
35	C myThid :: thread number
36	INTEGER bi,bj,k
37	_RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
38	_RL KappaRU(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
39	INTEGER myThid
40
41	C !OUTPUT PARAMETERS: ==================================================
42	C rViscFluxU :: viscous fluxes
43	_RL rViscFluxU(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
44
45	C !LOCAL VARIABLES: ====================================================
46	C i,j :: loop indices
47	INTEGER i,j
48	CEOP
49
50	C - Vertical viscous flux
51	IF ( k.LE.1 .OR. k.GT.Nr ) THEN
52	DO j=1-Oly,sNy+Oly
53	DO i=1-Olx,sNx+Olx
54	rViscFluxU(i,j) = 0. _d 0
55	ENDDO
56	ENDDO
57	ELSE
58	DO j=1-Oly,sNy+Oly-1
59	DO i=1-Olx,sNx+Olx-1
60	rViscFluxU(i,j) =
61	& -KappaRU(i,j,k)
62	& *rAw(i,j,bi,bj)
63	& *( uFld(i,j,k,bi,bj)-uFld(i,j,k-1,bi,bj)
64	& )rkSignrecip_drC(k)
65	& *_maskW(i,j,k,bi,bj)
66	& *_maskW(i,j,k-1,bi,bj)
67	ENDDO
68	ENDDO
69	ENDIF
70
71	RETURN
72	END