/[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 1.3 by jmc, Wed Mar 6 01:29:36 2002 UTC
# Line 31  C     == Routine arguments == Line 31  C     == Routine arguments ==
31        INTEGER myThid        INTEGER myThid
32    
33  C     == Local variables ==  C     == Local variables ==
34    C     uFld   :: velocity [m/s], zonal component
35        INTEGER i,j        INTEGER i,j
36        _RL Rjm,Rj,Rjp,cfl,d0,d1        _RL Rjm,Rj,Rjp,cfl,d0,d1
37          _RL psiP,psiM,thetaP,thetaM
38          _RL uFld
39    
40        DO j=1-Oly,sNy+Oly        DO j=1-Oly,sNy+Oly
41         uT(1-Olx,j)=0.         uT(1-Olx,j)=0.
# Line 43  C     == Local variables == Line 46  C     == Local variables ==
46          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)
47          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)
48    
49          cfl=uVel(i,j,k,bi,bj)*deltaT*recip_dxc(i,j,bi,bj)  c       uFld = uVel(i,j,k,bi,bj)
50          d0=(2.-abs(cfl))*(1.-abs(cfl))*oneSixth          uFld = uTrans(i,j)*recip_dyG(i,j,bi,bj)
51          d1=(1.-cfl)*(1.+cfl)*oneSixth       &       *recip_drF(k)*recip_hFacW(i,j,k,bi,bj)
52            cfl=abs(uFld*deltaT*recip_dxC(i,j,bi,bj))
53            d0=(2.-cfl)*(1.-cfl)*oneSixth
54            d1=(1.-cfl*cfl)*oneSixth
55    c       thetaP=0.
56    c       IF (Rj.NE.0.) thetaP=Rjm/Rj
57            thetaP=Rjm/(1.D-20+Rj)
58            psiP=d0+d1*thetaP
59    c       psiP=max(0.,min(min(1.,psiP),(1.-cfl)/(1.D-20+cfl)*thetaP))
60            thetaM=Rjp/(1.D-20+Rj)
61    c       thetaM=0.
62    c       IF (Rj.NE.0.) thetaM=Rjp/Rj
63            psiM=d0+d1*thetaM
64    c       psiM=max(0.,min(min(1.,psiM),(1.-cfl)/(1.D-20+cfl)*thetaM))
65          uT(i,j)=          uT(i,j)=
66       &   0.5*(uTrans(i,j)+abs(uTrans(i,j)))       &   0.5*(uTrans(i,j)+abs(uTrans(i,j)))
67       &      *( Tracer(i-1,j) + d0*Rj + d1*Rjm )       &      *( Tracer(i-1,j) + psiP*Rj )
68       &  +0.5*(uTrans(i,j)-abs(uTrans(i,j)))       &  +0.5*(uTrans(i,j)-abs(uTrans(i,j)))
69       &      *( Tracer( i ,j) - d0*Rj + d1*Rjp )       &      *( Tracer( i ,j) - psiM*Rj )
70    
71         ENDDO         ENDDO
72        ENDDO        ENDDO
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