/[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 1.6 by jmc, Fri Sep 24 16:53:45 2004 UTC
# Line 6  C $Name$ Line 6  C $Name$
6        SUBROUTINE GAD_DST3FL_ADV_X(        SUBROUTINE GAD_DST3FL_ADV_X(
7       I           bi,bj,k,deltaT,       I           bi,bj,k,deltaT,
8       I           uTrans, uVel,       I           uTrans, uVel,
9       I           tracer,       I           maskLocW, tracer,
10       O           uT,       O           uT,
11       I           myThid )       I           myThid )
12  C     /==========================================================\  C     /==========================================================\
# Line 26  C     == Routine arguments == Line 26  C     == Routine arguments ==
26        _RL deltaT        _RL deltaT
27        _RL uTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL uTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
28        _RL uVel(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)        _RL uVel(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
29          _RS maskLocW(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
30        _RL tracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL tracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
31        _RL uT    (1-OLx:sNx+OLx,1-OLy:sNy+OLy)        _RL uT    (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
32        INTEGER myThid        INTEGER myThid
33    
34  C     == Local variables ==  C     == Local variables ==
35    C     uFld   :: velocity [m/s], zonal component
36        INTEGER i,j        INTEGER i,j
37        _RL Rjm,Rj,Rjp,cfl,d0,d1,psiP,psiM,thetaP,thetaM        _RL Rjm,Rj,Rjp,cfl,d0,d1,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.D0
42         uT(2-Olx,j)=0.         uT(2-Olx,j)=0.D0
43         uT(sNx+Olx,j)=0.         uT(sNx+Olx,j)=0.D0
44         DO i=1-Olx+2,sNx+Olx-1         DO i=1-Olx+2,sNx+Olx-1
45          Rjp=(tracer(i+1,j)-tracer(i,j))*maskW(i+1,j,k,bi,bj)          Rjp=(tracer(i+1,j)-tracer( i ,j))*maskLocW(i+1,j)
46          Rj =(tracer(i,j)-tracer(i-1,j))*maskW(i,j,k,bi,bj)          Rj =(tracer( i ,j)-tracer(i-1,j))*maskLocW( i ,j)
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))*maskLocW(i-1,j)
48    
49          cfl=abs(uVel(i,j,k,bi,bj)*deltaT*recip_dxc(i,j,bi,bj))  c       uFld = uVel(i,j,k,bi,bj)
50          d0=(2.-cfl)*(1.-cfl)*oneSixth          uFld = uTrans(i,j)*recip_dyG(i,j,bi,bj)
51          d1=(1.-cfl*cfl)*oneSixth       &       *recip_drF(k)*recip_hFacW(i,j,k,bi,bj)
52  c       thetaP=0.          cfl=abs(uFld*deltaT*recip_dxC(i,j,bi,bj))
53  c       IF (Rj.NE.0.) thetaP=Rjm/Rj          d0=(2.D0-cfl)*(1.D0-cfl)*oneSixth
54            d1=(1.D0-cfl*cfl)*oneSixth
55    c       thetaP=0.D0
56    c       IF (Rj.NE.0.D0) thetaP=Rjm/Rj
57          thetaP=Rjm/(1.D-20+Rj)          thetaP=Rjm/(1.D-20+Rj)
58          psiP=d0+d1*thetaP          psiP=d0+d1*thetaP
59          psiP=max(0., min(min(1.,psiP),(1.-cfl)/(1.D-20+cfl)*thetaP))          psiP=max(0.D0, min(min(1.D0,psiP),
60         &       (1.D0-cfl)/(1.D-20+cfl)*thetaP))
61          thetaM=Rjp/(1.D-20+Rj)          thetaM=Rjp/(1.D-20+Rj)
62  c       thetaM=0.  c       thetaM=0.D0
63  c       IF (Rj.NE.0.) thetaM=Rjp/Rj  c       IF (Rj.NE.0.D0) thetaM=Rjp/Rj
64          psiM=d0+d1*thetaM          psiM=d0+d1*thetaM
65          psiM=max(0., min(min(1.,psiM),(1.-cfl)/(1.D-20+cfl)*thetaM))          psiM=max(0.D0, min(min(1.D0,psiM),
66         &       (1.D0-cfl)/(1.D-20+cfl)*thetaM))
67          uT(i,j)=          uT(i,j)=
68       &   0.5*(uTrans(i,j)+abs(uTrans(i,j)))       &   0.5*(uTrans(i,j)+abs(uTrans(i,j)))
69       &      *( Tracer(i-1,j) + psiP*Rj )       &      *( Tracer(i-1,j) + psiP*Rj )
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