1 |
adcroft |
1.1 |
C $Header: $ |
2 |
|
|
C $Name: $ |
3 |
|
|
|
4 |
|
|
#include "GAD_OPTIONS.h" |
5 |
|
|
|
6 |
|
|
SUBROUTINE GAD_DST3FL_ADV_X( |
7 |
|
|
I bi,bj,k,deltaT, |
8 |
|
|
I uTrans, uVel, |
9 |
|
|
I tracer, |
10 |
|
|
O uT, |
11 |
|
|
I myThid ) |
12 |
|
|
C /==========================================================\ |
13 |
|
|
C | SUBROUTINE GAD_DST3FL_ADV_X | |
14 |
|
|
C | o Compute Zonal advective Flux of Tracer using | |
15 |
|
|
C | 3rd Order DST Sceheme with flux limiting | |
16 |
|
|
C |==========================================================| |
17 |
|
|
IMPLICIT NONE |
18 |
|
|
|
19 |
|
|
C == GLobal variables == |
20 |
|
|
#include "SIZE.h" |
21 |
|
|
#include "GRID.h" |
22 |
|
|
#include "GAD.h" |
23 |
|
|
|
24 |
|
|
C == Routine arguments == |
25 |
|
|
INTEGER bi,bj,k |
26 |
|
|
_RL deltaT |
27 |
|
|
_RL uTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
28 |
|
|
_RL uVel(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy) |
29 |
|
|
_RL tracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
30 |
|
|
_RL uT (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
31 |
|
|
INTEGER myThid |
32 |
|
|
|
33 |
|
|
C == Local variables == |
34 |
|
|
INTEGER i,j |
35 |
|
|
_RL Rjm,Rj,Rjp,cfl,d0,d1,psiP,thetaP,psiM,thetaM |
36 |
|
|
|
37 |
|
|
DO j=1-Oly,sNy+Oly |
38 |
|
|
uT(1-Olx,j)=0. |
39 |
|
|
uT(2-Olx,j)=0. |
40 |
|
|
uT(sNx+Olx,j)=0. |
41 |
|
|
DO i=1-Olx+2,sNx+Olx-1 |
42 |
|
|
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) |
44 |
|
|
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) |
47 |
|
|
d0=(2.-abs(cfl))*(1.-abs(cfl))*oneSixth |
48 |
|
|
d1=(1.-cfl)*(1.+cfl)*oneSixth |
49 |
|
|
thetaP=Rjm/(1.D-30+Rj) |
50 |
|
|
psiP=d0+d1*thetaP |
51 |
|
|
psiP=max(0., min(min(1.,psiP),(1.-cfl)/cfl*thetaP) ) |
52 |
|
|
thetaM=Rjp/(-1.D-30+Rj) |
53 |
|
|
psiM=d0+d1*thetaM |
54 |
|
|
psiM=max(0., min(min(1.,psiM),(1.-cfl)/cfl*thetaM) ) |
55 |
|
|
uT(i,j)= |
56 |
|
|
c & 0.5*(uTrans(i,j)+abs(uTrans(i,j))) |
57 |
|
|
c & *( Tracer(i-1,j) + d0*Rj + d1*Rjm ) |
58 |
|
|
c & +0.5*(uTrans(i,j)-abs(uTrans(i,j))) |
59 |
|
|
c & *( Tracer( i ,j) - d0*Rj + d1*Rjp ) |
60 |
|
|
& 0.5*(uTrans(i,j)+abs(uTrans(i,j))) |
61 |
|
|
& *( Tracer(i-1,j) + psiP*Rj ) |
62 |
|
|
& +0.5*(uTrans(i,j)-abs(uTrans(i,j))) |
63 |
|
|
& *( Tracer( i ,j) - psiM*Rj ) |
64 |
|
|
|
65 |
|
|
ENDDO |
66 |
|
|
ENDDO |
67 |
|
|
|
68 |
|
|
RETURN |
69 |
|
|
END |