pkg/generic_advdiff/gad_u3_adv_x.F

C $Header:  $
C $Name:  $

#include "GAD_OPTIONS.h"

      SUBROUTINE GAD_U3_ADV_X( 
     I           bi,bj,k,
     I           uTrans,
     I           tracer,
     O           uT,
     I           myThid )
C     /==========================================================\
C     | SUBROUTINE GAD_U3_ADV_X                                  |
C     | o Compute Zonal advective Flux of Tracer using           |
C     |   3rd Order Upwind Scheme                                |
C     |==========================================================|
      IMPLICIT NONE

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

C     == Routine arguments ==
      INTEGER bi,bj,k
      _RL uTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _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 Rjm,Rj,Rjp,Rjjm,Rjjp

      DO j=1-Oly,sNy+Oly
       uT(1-Olx,j)=0.
       uT(2-Olx,j)=0.
       uT(sNx+Olx,j)=0.
       DO i=1-Olx+2,sNx+Olx-1
        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)
        Rjjp=Rjp-Rj
        Rjjm=Rj-Rjm
        uT(i,j) = 
     &   uTrans(i,j)*(
     &     Tracer(i,j)+Tracer(i-1,j)-oneSixth*( Rjjp+Rjjm )
     &               )*0.5 _d 0
     &  +ABS( uTrans(i,j) )*0.5 _d 0*oneSixth*( Rjjp-Rjjm )
       ENDDO
      ENDDO

      RETURN
      END
1	jmc	1.1	C $Header: $
2			C $Name: $
3
4			#include "GAD_OPTIONS.h"
5
6			SUBROUTINE GAD_U3_ADV_X(
7			I bi,bj,k,
8			I uTrans,
9			I tracer,
10			O uT,
11			I myThid )
12			C /==========================================================\
13			C \| SUBROUTINE GAD_U3_ADV_X \|
14			C \| o Compute Zonal advective Flux of Tracer using \|
15			C \| 3rd Order Upwind Scheme \|
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 uTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
27			_RL tracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
28			_RL uT (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
29			INTEGER myThid
30
31			C == Local variables ==
32			INTEGER i,j
33			_RL Rjm,Rj,Rjp,Rjjm,Rjjp
34
35			DO j=1-Oly,sNy+Oly
36			uT(1-Olx,j)=0.
37			uT(2-Olx,j)=0.
38			uT(sNx+Olx,j)=0.
39			DO i=1-Olx+2,sNx+Olx-1
40			Rjp=(tracer(i+1,j)-tracer(i,j))*maskW(i+1,j,k,bi,bj)
41			Rj =(tracer(i,j)-tracer(i-1,j))*maskW(i,j,k,bi,bj)
42			Rjm=(tracer(i-1,j)-tracer(i-2,j))*maskW(i-1,j,k,bi,bj)
43			Rjjp=Rjp-Rj
44			Rjjm=Rj-Rjm
45			uT(i,j) =
46			& uTrans(i,j)*(
47			& Tracer(i,j)+Tracer(i-1,j)-oneSixth*( Rjjp+Rjjm )
48			& )*0.5 _d 0
49			& +ABS( uTrans(i,j) )0.5 _d 0oneSixth*( Rjjp-Rjjm )
50			ENDDO
51			ENDDO
52
53			RETURN
54			END