/[MITgcm]/MITgcm/pkg/generic_advdiff/gad_dst3fl_adv_x.F
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revision 1.3 by adcroft, Mon Sep 10 00:24:14 2001 UTC revision 1.3.4.1 by heimbach, Wed Feb 6 15:48:08 2002 UTC
# Line 35  C     == Local variables == Line 35  C     == Local variables ==
35        _RL Rjm,Rj,Rjp,cfl,d0,d1,psiP,psiM,thetaP,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=abs(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.-cfl)*(1.-cfl)*oneSixth          d0=(2.D0-cfl)*(1.D0-cfl)*oneSixth
48          d1=(1.-cfl*cfl)*oneSixth          d1=(1.D0-cfl*cfl)*oneSixth
49  c       thetaP=0.  c       thetaP=0.D0
50  c       IF (Rj.NE.0.) thetaP=Rjm/Rj  c       IF (Rj.NE.0.D0) thetaP=Rjm/Rj
51          thetaP=Rjm/(1.D-20+Rj)          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)/(1.D-20+cfl)*thetaP))          psiP=max(0.D0, min(min(1.D0,psiP),
54         &       (1.D0-cfl)/(1.D-20+cfl)*thetaP))
55          thetaM=Rjp/(1.D-20+Rj)          thetaM=Rjp/(1.D-20+Rj)
56  c       thetaM=0.  c       thetaM=0.D0
57  c       IF (Rj.NE.0.) thetaM=Rjp/Rj  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)/(1.D-20+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 )
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