/[MITgcm]/MITgcm/pkg/generic_advdiff/gad_dst3_adv_y.F
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revision 1.1 by adcroft, Tue Sep 4 14:53:11 2001 UTC revision 1.2 by adcroft, Mon Sep 10 00:14:05 2001 UTC
# Line 33  C     == Routine arguments == Line 33  C     == Routine arguments ==
33  C     == Local variables ==  C     == Local variables ==
34        INTEGER i,j        INTEGER i,j
35        _RL Rjm,Rj,Rjp,cfl,d0,d1        _RL Rjm,Rj,Rjp,cfl,d0,d1
36          _RL psiP,psiM,thetaP,thetaM
37    
38        DO i=1-Olx,sNx+Olx        DO i=1-Olx,sNx+Olx
39         vT(i,1-Oly)=0.         vT(i,1-Oly)=0.
# Line 45  C     == Local variables == Line 46  C     == Local variables ==
46          Rj =(tracer(i,j)-tracer(i,j-1))*maskS(i,j,k,bi,bj)          Rj =(tracer(i,j)-tracer(i,j-1))*maskS(i,j,k,bi,bj)
47          Rjm=(tracer(i,j-1)-tracer(i,j-2))*maskS(i,j-1,k,bi,bj)          Rjm=(tracer(i,j-1)-tracer(i,j-2))*maskS(i,j-1,k,bi,bj)
48    
49          cfl=vVel(i,j,k,bi,bj)*deltaT*recip_dyc(i,j,bi,bj)          cfl=abs(vVel(i,j,k,bi,bj)*deltaT*recip_dyc(i,j,bi,bj))
50          d0=(2.-abs(cfl))*(1.-abs(cfl))*oneSixth          d0=(2.-cfl)*(1.-cfl)*oneSixth
51          d1=(1.-cfl)*(1.+cfl)*oneSixth          d1=(1.-cfl*cfl)*oneSixth
52    c       thetaP=0.
53    c       IF (Rj.NE.0.) thetaP=Rjm/Rj
54            thetaP=Rjm/(1.D-20+Rj)
55            psiP=d0+d1*thetaP
56    c       psiP=max(0.,min(min(1.,psiP),(1.-cfl)/(1.D-20+cfl)*thetaP))
57            thetaM=Rjp/(1.D-20+Rj)
58    c       thetaM=0.
59    c       IF (Rj.NE.0.) thetaM=Rjp/Rj
60            psiM=d0+d1*thetaM
61    c       psiM=max(0.,min(min(1.,psiM),(1.-cfl)/(1.D-20+cfl)*thetaM))
62          vT(i,j)=          vT(i,j)=
63       &   0.5*(vTrans(i,j)+abs(vTrans(i,j)))       &   0.5*(vTrans(i,j)+abs(vTrans(i,j)))
64       &      *( Tracer(i,j-1) + d0*Rj + d1*Rjm )       &      *( Tracer(i,j-1) + psiP*Rj )
65       &  +0.5*(vTrans(i,j)-abs(vTrans(i,j)))       &  +0.5*(vTrans(i,j)-abs(vTrans(i,j)))
66       &      *( Tracer(i, j ) - d0*Rj + d1*Rjp )       &      *( Tracer(i, j ) - psiM*Rj )
67    
68         ENDDO         ENDDO
69        ENDDO        ENDDO
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