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Last-Modified: Mon, 26 Oct 2025 05:09:05 GMT Content-Type: text/html; charset=utf-8 MITgcm/MITgcm/pkg/mom_common/MOM_VISC.h
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3e7e83cab9 Jean*0001 C- Common file for length scales
0c0d21fb5c Davi*0002 
                0003 #ifdef ALLOW_MOM_COMMON
                0004 
845dcd8102 Jean*0005 C--   COMMON /MOM_VISC_PAR_L/ logical-type parameters for Momemtum viscosity
                0006 C     useHarmonicVisc   :: harmonic   horizontal viscosity is used
                0007 C     useBiharmonicVisc :: biharmonic horizontal viscosity is used
                0008 C     useVariableVisc   :: variable (in space or time) viscosity is used
                0009       COMMON /MOM_VISC_PAR_L/
                0010      &        useHarmonicVisc, useBiharmonicVisc, useVariableVisc
                0011       LOGICAL useHarmonicVisc, useBiharmonicVisc, useVariableVisc
                0012 
                0013       COMMON /MOM_VISC_LENGTH/ L2_D, L2_Z,
                0014      &                         L3_D, L3_Z,
                0015      &                         L4rdt_D, L4rdt_Z
0c0d21fb5c Davi*0016       _RL L2_D(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
                0017       _RL L2_Z(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
                0018       _RL L3_D(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
                0019       _RL L3_Z(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
                0020       _RL L4rdt_D(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
                0021       _RL L4rdt_Z(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
                0022 
31fb0e0e6d Jean*0023 C--   COMMON /MOM_FLUXFORM_GRID/ just to hold a copy of deepFacC
                0024 C     deepFacAdv :: copy of deepFacC or just Nr-length vector of 1 when
                0025 C                   MOM_USE_OLD_DEEP_VERT_ADV is defined or useNHMTerms=F
                0026       COMMON /MOM_GRID_COPY/ deepFacAdv
                0027       _RL deepFacAdv(Nr)
                0028 
af960ebfb4 Jean*0029 #ifdef ALLOW_SMAG_3D
                0030 C     smag3D_hLsC :: horiz. grid length scale (power 2/3) at grid cell center
                0031 C     smag3D_hLsW :: horiz. grid length scale (power 2/3) at western  edge
                0032 C     smag3D_hLsS :: horiz. grid length scale (power 2/3) at southern egde
                0033 C     smag3D_hLsZ :: horiz. grid length scale (power 2/3) at grid cell corner
                0034       COMMON /MOM_SMAG_3D_LENGTH/
                0035      &        smag3D_hLsC, smag3D_hLsW,
                0036      &        smag3D_hLsS, smag3D_hLsZ
                0037       _RS smag3D_hLsC(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
                0038       _RS smag3D_hLsW(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
                0039       _RS smag3D_hLsS(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
                0040       _RS smag3D_hLsZ(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
                0041 #endif /* ALLOW_SMAG_3D */
                0042 
18ef5132e1 Gael*0043 #ifdef ALLOW_3D_VISCAH
                0044 C     viscAhDfld, viscAhZfld :: full 3D specification of Laplacian Viscosity
3e7e83cab9 Jean*0045 C               coeff. for mixing of momentum horizontally ( units of m^2/s )
845dcd8102 Jean*0046       COMMON /MOM_VISC_3D_VISCAH/
18ef5132e1 Gael*0047      &                  viscAhDfld, viscAhZfld
                0048       _RL  viscAhDfld (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
                0049       _RL  viscAhZfld (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
                0050 #endif
                0051 
                0052 #ifdef ALLOW_3D_VISCA4
                0053 C     viscA4Dfld, viscA4Zfld :: full 3D specification of Bi-harmonic Viscosity
3e7e83cab9 Jean*0054 C               coeff. for mixing of momentum horizontally ( units of m^4/s )
845dcd8102 Jean*0055       COMMON /MOM_VISC_3D_VISCA4/
18ef5132e1 Gael*0056      &                  viscA4Dfld, viscA4Zfld
                0057       _RL  viscA4Dfld (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
                0058       _RL  viscA4Zfld (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
                0059 #endif
                0060 
845dcd8102 Jean*0061 #ifdef ALLOW_NONHYDROSTATIC
                0062 C     viscAh_W  :: Horizontal  harmonic  viscosity for vertical momentum
                0063 C     viscA4_W  :: Horizontal biharmonic viscosity for vertical momentum
                0064       COMMON /MOM_VISC_NH/
                0065      &                  viscAh_W, viscA4_W
                0066       _RL  viscAh_W(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
                0067       _RL  viscA4_W(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
                0068 #endif /* ALLOW_NONHYDROSTATIC */
                0069 
ab47de63dc Mart*0070 #ifdef ALLOW_BOTTOMDRAG_ROUGHNESS
                0071 C--   bottom drag coefficents as a function of grid cell thickness
                0072 C     and roughness length
31fb0e0e6d Jean*0073       COMMON /MOM_DRAGCOEFFS_RS/
ab47de63dc Mart*0074      &     bottomDragCoeffW, bottomDragCoeffS
                0075       _RS bottomDragCoeffW(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
                0076       _RS bottomDragCoeffS(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
                0077 #endif
                0078 
0c0d21fb5c Davi*0079 #endif /* ALLOW_MOM_COMMON */
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