/[MITgcm]/MITgcm/pkg/generic_advdiff/gad_dst3fl_adv_x.F
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revision 1.2 by heimbach, Wed Sep 5 17:46:03 2001 UTC revision 1.3.4.1 by heimbach, Wed Feb 6 15:48:08 2002 UTC
# Line 32  C     == Routine arguments == Line 32  C     == Routine arguments ==
32    
33  C     == Local variables ==  C     == Local variables ==
34        INTEGER i,j        INTEGER i,j
35        _RL Rjm,Rj,Rjp,cfl,d0,d1,psiP,thetaP,psiM,thetaM        _RL Rjm,Rj,Rjp,cfl,d0,d1,psiP,psiM,thetaP,thetaM
36    
37        DO j=1-Oly,sNy+Oly        DO j=1-Oly,sNy+Oly
38         uT(1-Olx,j)=0.         uT(1-Olx,j)=0.D0
39         uT(2-Olx,j)=0.         uT(2-Olx,j)=0.D0
40         uT(sNx+Olx,j)=0.         uT(sNx+Olx,j)=0.D0
41         DO i=1-Olx+2,sNx+Olx-1         DO i=1-Olx+2,sNx+Olx-1
42          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)
43          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)
44          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)
45    
46          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))
47          d0=(2.-abs(cfl))*(1.-abs(cfl))*oneSixth          d0=(2.D0-cfl)*(1.D0-cfl)*oneSixth
48          d1=(1.-cfl)*(1.+cfl)*oneSixth          d1=(1.D0-cfl*cfl)*oneSixth
49          thetaP=Rjm/(1.D-30+Rj)  c       thetaP=0.D0
50    c       IF (Rj.NE.0.D0) thetaP=Rjm/Rj
51            thetaP=Rjm/(1.D-20+Rj)
52          psiP=d0+d1*thetaP          psiP=d0+d1*thetaP
53          psiP=max(0., min(min(1.,psiP),(1.-cfl)/cfl*thetaP) )          psiP=max(0.D0, min(min(1.D0,psiP),
54          thetaM=Rjp/(-1.D-30+Rj)       &       (1.D0-cfl)/(1.D-20+cfl)*thetaP))
55            thetaM=Rjp/(1.D-20+Rj)
56    c       thetaM=0.D0
57    c       IF (Rj.NE.0.D0) thetaM=Rjp/Rj
58          psiM=d0+d1*thetaM          psiM=d0+d1*thetaM
59          psiM=max(0., min(min(1.,psiM),(1.-cfl)/cfl*thetaM) )          psiM=max(0.D0, min(min(1.D0,psiM),
60         &       (1.D0-cfl)/(1.D-20+cfl)*thetaM))
61          uT(i,j)=          uT(i,j)=
62       &   0.5*(uTrans(i,j)+abs(uTrans(i,j)))       &   0.5*(uTrans(i,j)+abs(uTrans(i,j)))
63       &      *( Tracer(i-1,j) + psiP*Rj )       &      *( Tracer(i-1,j) + psiP*Rj )
64       &  +0.5*(uTrans(i,j)-abs(uTrans(i,j)))       &  +0.5*(uTrans(i,j)-abs(uTrans(i,j)))
65       &      *( Tracer( i ,j) - psiM*Rj )       &      *( Tracer( i ,j) - psiM*Rj )
 cph *note* put these comments after end of continued line  
 cph        to ensure TAMC compatibility  
 c    &   0.5*(uTrans(i,j)+abs(uTrans(i,j)))  
 c    &      *( Tracer(i-1,j) + d0*Rj + d1*Rjm )  
 c    &  +0.5*(uTrans(i,j)-abs(uTrans(i,j)))  
 c    &      *( Tracer( i ,j) - d0*Rj + d1*Rjp )  
66    
67         ENDDO         ENDDO
68        ENDDO        ENDDO
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