/[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 1.3.4.2 by heimbach, Fri Mar 7 03:55:23 2003 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,psiP,psiM,thetaP,thetaM        _RL Rjm,Rj,Rjp,cfl,d0,d1,psiP,psiM,thetaP,thetaM
37          _RL uFld
38    
39        DO j=1-Oly,sNy+Oly        DO j=1-Oly,sNy+Oly
40         uT(1-Olx,j)=0.         uT(1-Olx,j)=0.D0
41         uT(2-Olx,j)=0.         uT(2-Olx,j)=0.D0
42         uT(sNx+Olx,j)=0.         uT(sNx+Olx,j)=0.D0
43         DO i=1-Olx+2,sNx+Olx-1         DO i=1-Olx+2,sNx+Olx-1
44          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)
45          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)
46          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)
47    
48          cfl=abs(uVel(i,j,k,bi,bj)*deltaT*recip_dxc(i,j,bi,bj))  c       uFld = uVel(i,j,k,bi,bj)
49          d0=(2.-cfl)*(1.-cfl)*oneSixth          uFld = uTrans(i,j)*recip_dyG(i,j,bi,bj)
50          d1=(1.-cfl*cfl)*oneSixth       &       *recip_drF(k)*recip_hFacW(i,j,k,bi,bj)
51  c       thetaP=0.          cfl=abs(uFld*deltaT*recip_dxC(i,j,bi,bj))
52  c       IF (Rj.NE.0.) thetaP=Rjm/Rj          d0=(2.D0-cfl)*(1.D0-cfl)*oneSixth
53            d1=(1.D0-cfl*cfl)*oneSixth
54    c       thetaP=0.D0
55    c       IF (Rj.NE.0.D0) thetaP=Rjm/Rj
56          thetaP=Rjm/(1.D-20+Rj)          thetaP=Rjm/(1.D-20+Rj)
57          psiP=d0+d1*thetaP          psiP=d0+d1*thetaP
58          psiP=max(0., min(min(1.,psiP),(1.-cfl)/(1.D-20+cfl)*thetaP))          psiP=max(0.D0, min(min(1.D0,psiP),
59         &       (1.D0-cfl)/(1.D-20+cfl)*thetaP))
60          thetaM=Rjp/(1.D-20+Rj)          thetaM=Rjp/(1.D-20+Rj)
61  c       thetaM=0.  c       thetaM=0.D0
62  c       IF (Rj.NE.0.) thetaM=Rjp/Rj  c       IF (Rj.NE.0.D0) thetaM=Rjp/Rj
63          psiM=d0+d1*thetaM          psiM=d0+d1*thetaM
64          psiM=max(0., min(min(1.,psiM),(1.-cfl)/(1.D-20+cfl)*thetaM))          psiM=max(0.D0, min(min(1.D0,psiM),
65         &       (1.D0-cfl)/(1.D-20+cfl)*thetaM))
66          uT(i,j)=          uT(i,j)=
67       &   0.5*(uTrans(i,j)+abs(uTrans(i,j)))       &   0.5*(uTrans(i,j)+abs(uTrans(i,j)))
68       &      *( Tracer(i-1,j) + psiP*Rj )       &      *( Tracer(i-1,j) + psiP*Rj )
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