/[MITgcm]/MITgcm/pkg/generic_advdiff/gad_dst3_adv_x.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 j=1-Oly,sNy+Oly        DO j=1-Oly,sNy+Oly
39         uT(1-Olx,j)=0.         uT(1-Olx,j)=0.
# Line 43  C     == Local variables == Line 44  C     == Local variables ==
44          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)
45          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)
46    
47          cfl=uVel(i,j,k,bi,bj)*deltaT*recip_dxc(i,j,bi,bj)          cfl=abs(uVel(i,j,k,bi,bj)*deltaT*recip_dxc(i,j,bi,bj))
48          d0=(2.-abs(cfl))*(1.-abs(cfl))*oneSixth          d0=(2.-cfl)*(1.-cfl)*oneSixth
49          d1=(1.-cfl)*(1.+cfl)*oneSixth          d1=(1.-cfl*cfl)*oneSixth
50    c       thetaP=0.
51    c       IF (Rj.NE.0.) thetaP=Rjm/Rj
52            thetaP=Rjm/(1.D-20+Rj)
53            psiP=d0+d1*thetaP
54    c       psiP=max(0.,min(min(1.,psiP),(1.-cfl)/(1.D-20+cfl)*thetaP))
55            thetaM=Rjp/(1.D-20+Rj)
56    c       thetaM=0.
57    c       IF (Rj.NE.0.) thetaM=Rjp/Rj
58            psiM=d0+d1*thetaM
59    c       psiM=max(0.,min(min(1.,psiM),(1.-cfl)/(1.D-20+cfl)*thetaM))
60          uT(i,j)=          uT(i,j)=
61       &   0.5*(uTrans(i,j)+abs(uTrans(i,j)))       &   0.5*(uTrans(i,j)+abs(uTrans(i,j)))
62       &      *( Tracer(i-1,j) + d0*Rj + d1*Rjm )       &      *( Tracer(i-1,j) + psiP*Rj )
63       &  +0.5*(uTrans(i,j)-abs(uTrans(i,j)))       &  +0.5*(uTrans(i,j)-abs(uTrans(i,j)))
64       &      *( Tracer( i ,j) - d0*Rj + d1*Rjp )       &      *( Tracer( i ,j) - psiM*Rj )
65    
66         ENDDO         ENDDO
67        ENDDO        ENDDO
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