/[MITgcm]/MITgcm/pkg/generic_advdiff/gad_fluxlimit_adv_x.F
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revision 1.3 by adcroft, Fri Sep 21 13:11:43 2001 UTC revision 1.4 by jmc, Wed Mar 6 01:29:36 2002 UTC
# Line 54  C !LOCAL VARIABLES: ==================== Line 54  C !LOCAL VARIABLES: ====================
54  C  i,j                  :: loop indices  C  i,j                  :: loop indices
55  C  Cr                   :: slope ratio  C  Cr                   :: slope ratio
56  C  Rjm,Rj,Rjp           :: differences at i-1,i,i+1  C  Rjm,Rj,Rjp           :: differences at i-1,i,i+1
57    C  uFld                 :: velocity [m/s], zonal component
58        INTEGER i,j        INTEGER i,j
59        _RL Cr,Rjm,Rj,Rjp        _RL Cr,Rjm,Rj,Rjp
60          _RL uFld
61  C Statement function provides Limiter(Cr)  C Statement function provides Limiter(Cr)
62  #include "GAD_FLUX_LIMITER.h"  #include "GAD_FLUX_LIMITER.h"
63  CEOP  CEOP
# Line 65  CEOP Line 67  CEOP
67         uT(2-Olx,j)=0.         uT(2-Olx,j)=0.
68         uT(sNx+Olx,j)=0.         uT(sNx+Olx,j)=0.
69         DO i=1-Olx+2,sNx+Olx-1         DO i=1-Olx+2,sNx+Olx-1
70    
71    c       uFld = uVel(i,j,k,bi,bj)
72            uFld = uTrans(i,j)*recip_dyG(i,j,bi,bj)
73         &       *recip_drF(k)*recip_hFacW(i,j,k,bi,bj)
74          Rjp=(tracer(i+1,j)-tracer(i,j))*maskW(i+1,j,k,bi,bj)          Rjp=(tracer(i+1,j)-tracer(i,j))*maskW(i+1,j,k,bi,bj)
75          Rj=(tracer(i,j)-tracer(i-1,j))*maskW(i,j,k,bi,bj)          Rj=(tracer(i,j)-tracer(i-1,j))*maskW(i,j,k,bi,bj)
76          Rjm=(tracer(i-1,j)-tracer(i-2,j))*maskW(i-1,j,k,bi,bj)          Rjm=(tracer(i-1,j)-tracer(i-2,j))*maskW(i-1,j,k,bi,bj)
77    
78          IF (Rj.NE.0.) THEN          IF (Rj.NE.0.) THEN
79           IF (uTrans(i,j).GT.0) THEN           IF (uTrans(i,j).GT.0) THEN
80             Cr=Rjm/Rj             Cr=Rjm/Rj
# Line 86  CEOP Line 93  CEOP
93       &   uTrans(i,j)*(Tracer(i,j)+Tracer(i-1,j))*0.5 _d 0       &   uTrans(i,j)*(Tracer(i,j)+Tracer(i-1,j))*0.5 _d 0
94       &   -0.5*(       &   -0.5*(
95       &        (1-Cr)*ABS(uTrans(i,j))       &        (1-Cr)*ABS(uTrans(i,j))
96       &        +uTrans(i,j)*uVel(i,j,k,bi,bj)*deltaT       &        +uTrans(i,j)*uFld*deltaT
97       &         *recip_dxC(i,j,bi,bj)*Cr       &         *recip_dxC(i,j,bi,bj)*Cr
98       &        )*Rj       &        )*Rj
99         ENDDO         ENDDO
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