pkg/generic_advdiff/gad_fluxlimit_adv_x.F

C $Header: $
C $Name: $

#include "GAD_OPTIONS.h"

      SUBROUTINE GAD_FLUXLIMIT_ADV_X( 
     I           bi,bj,k,deltaT,
     I           uTrans, uVel,
     I           tracer,
     O           uT,
     I           myThid )
      IMPLICIT NONE

C     == GLobal variables ==
#include "SIZE.h"
#include "GRID.h"

C     == Routine arguments ==
      INTEGER bi,bj,k
      _RL deltaT
      _RL uTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RL uVel  (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
      _RL tracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RL uT    (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      INTEGER myThid

C     == Local variables ==
      INTEGER i,j
      _RL Cr,Rjm,Rj,Rjp
#include "GAD_FLUX_LIMITER.h"

      DO j=1-Oly,sNy+Oly
       uT(1-Olx,j)=0.
       DO i=1-Olx+1,sNx+Olx
        Rjp=(tracer(i+1,j)-tracer(i,j))*maskW(i+1,j,k,bi,bj)
        Rj=(tracer(i,j)-tracer(i-1,j))*maskW(i,j,k,bi,bj)
        Rjm=(tracer(i-1,j)-tracer(i-2,j))*maskW(i-1,j,k,bi,bj)
        IF (Rj.NE.0.) THEN
         IF (uTrans(i,j).GT.0) THEN
           Cr=Rjm/Rj
         ELSE
           Cr=Rjp/Rj
         ENDIF
        ELSE
         IF (uTrans(i,j).GT.0) THEN
           Cr=Rjm*1.E20
         ELSE
           Cr=Rjp*1.E20
         ENDIF
        ENDIF
        Cr=Limiter(Cr)
        uT(i,j) = 
     &   uTrans(i,j)*(Tracer(i,j)+Tracer(i-1,j))*0.5 _d 0
     &   -0.5*(
     &        (1-Cr)*ABS(uTrans(i,j))
     &        +uTrans(i,j)*uVel(i,j,k,bi,bj)*deltaT
     &         *recip_dxC(i,j,bi,bj)*Cr
     &        )*Rj
       ENDDO
      ENDDO

      RETURN
      END
1	C $Header: $
2	C $Name: $
3
4	#include "GAD_OPTIONS.h"
5
6	SUBROUTINE GAD_FLUXLIMIT_ADV_X(
7	I bi,bj,k,deltaT,
8	I uTrans, uVel,
9	I tracer,
10	O uT,
11	I myThid )
12	IMPLICIT NONE
13
14	C == GLobal variables ==
15	#include "SIZE.h"
16	#include "GRID.h"
17
18	C == Routine arguments ==
19	INTEGER bi,bj,k
20	_RL deltaT
21	_RL uTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
22	_RL uVel (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
23	_RL tracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
24	_RL uT (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
25	INTEGER myThid
26
27	C == Local variables ==
28	INTEGER i,j
29	_RL Cr,Rjm,Rj,Rjp
30	#include "GAD_FLUX_LIMITER.h"
31
32	DO j=1-Oly,sNy+Oly
33	uT(1-Olx,j)=0.
34	DO i=1-Olx+1,sNx+Olx
35	Rjp=(tracer(i+1,j)-tracer(i,j))*maskW(i+1,j,k,bi,bj)
36	Rj=(tracer(i,j)-tracer(i-1,j))*maskW(i,j,k,bi,bj)
37	Rjm=(tracer(i-1,j)-tracer(i-2,j))*maskW(i-1,j,k,bi,bj)
38	IF (Rj.NE.0.) THEN
39	IF (uTrans(i,j).GT.0) THEN
40	Cr=Rjm/Rj
41	ELSE
42	Cr=Rjp/Rj
43	ENDIF
44	ELSE
45	IF (uTrans(i,j).GT.0) THEN
46	Cr=Rjm*1.E20
47	ELSE
48	Cr=Rjp*1.E20
49	ENDIF
50	ENDIF
51	Cr=Limiter(Cr)
52	uT(i,j) =
53	& uTrans(i,j)(Tracer(i,j)+Tracer(i-1,j))0.5 _d 0
54	& -0.5*(
55	& (1-Cr)*ABS(uTrans(i,j))
56	& +uTrans(i,j)uVel(i,j,k,bi,bj)deltaT
57	& recip_dxC(i,j,bi,bj)Cr
58	& )*Rj
59	ENDDO
60	ENDDO
61
62	RETURN
63	END