pkg/mom_vecinv/mom_u_bottomdrag.F

C $Header: /u/gcmpack/models/MITgcmUV/pkg/mom_vecinv/Attic/mom_u_bottomdrag.F,v 1.1.2.1 2001/03/30 21:13:33 adcroft Exp $
C $Name: pre38-close $

#include "CPP_OPTIONS.h"

      SUBROUTINE MOM_U_BOTTOMDRAG(
     I        bi,bj,k,
     I        uFld, KE, KappaRU,
     O        uDragTerms,
     I        myThid)
      IMPLICIT NONE
C
C     Calculate bottom drag terms for U eqn
C       - is not vector invariant ...
C

C     == Global variables ==
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "GRID.h"

C     == Routine arguments ==
      INTEGER bi,bj,k
      _RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RL KE(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RL KappaRU(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
      _RL uDragTerms(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RL viscFac
      INTEGER myThid

C     == Local variables ==
      INTEGER I,J,Kp1
      _RL rdrckp1,maskDown

C-  No-slip BCs impose a drag at bottom
      Kp1=min(k+1,Nr)
      rdrckp1=recip_drC(kp1)
      IF (k.EQ.Nr) rdrckp1=recip_drF(k)
      viscFac=1.
      IF (.NOT. no_slip_bottom) viscFac=0.
      DO j=1-Oly,sNy+Oly-1
       DO i=1-Olx+1,sNx+Olx-1
        maskDown=_maskW(i,j,kp1,bi,bj)
        IF (k.EQ.Nr) maskDown=0.
        uDragTerms(i,j)=
     &   -_recip_hFacW(i,j,k,bi,bj)*recip_drF(k)
     &   *( 
     &      2.*KappaRU(i,j,kp1)*rkFac*rdrckp1*viscFac
     &     + bottomDragLinear
     &     + bottomDragQuadratic*sqrt(KE(i,j)+KE(i-1,j))
     &    )*(1.-maskDown)*uFld(i,j)
       ENDDO
      ENDDO

      RETURN
      END
1	C $Header: /u/gcmpack/models/MITgcmUV/pkg/mom_vecinv/Attic/mom_u_bottomdrag.F,v 1.1.2.1 2001/03/30 21:13:33 adcroft Exp $
2	C $Name: pre38-close $
3
4	#include "CPP_OPTIONS.h"
5
6	SUBROUTINE MOM_U_BOTTOMDRAG(
7	I bi,bj,k,
8	I uFld, KE, KappaRU,
9	O uDragTerms,
10	I myThid)
11	IMPLICIT NONE
12	C
13	C Calculate bottom drag terms for U eqn
14	C - is not vector invariant ...
15	C
16
17	C == Global variables ==
18	#include "SIZE.h"
19	#include "EEPARAMS.h"
20	#include "PARAMS.h"
21	#include "GRID.h"
22
23	C == Routine arguments ==
24	INTEGER bi,bj,k
25	_RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
26	_RL KE(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
27	_RL KappaRU(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr)
28	_RL uDragTerms(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
29	_RL viscFac
30	INTEGER myThid
31
32	C == Local variables ==
33	INTEGER I,J,Kp1
34	_RL rdrckp1,maskDown
35
36	C- No-slip BCs impose a drag at bottom
37	Kp1=min(k+1,Nr)
38	rdrckp1=recip_drC(kp1)
39	IF (k.EQ.Nr) rdrckp1=recip_drF(k)
40	viscFac=1.
41	IF (.NOT. no_slip_bottom) viscFac=0.
42	DO j=1-Oly,sNy+Oly-1
43	DO i=1-Olx+1,sNx+Olx-1
44	maskDown=_maskW(i,j,kp1,bi,bj)
45	IF (k.EQ.Nr) maskDown=0.
46	uDragTerms(i,j)=
47	& -_recip_hFacW(i,j,k,bi,bj)*recip_drF(k)
48	& *(
49	& 2.KappaRU(i,j,kp1)rkFacrdrckp1viscFac
50	& + bottomDragLinear
51	& + bottomDragQuadratic*sqrt(KE(i,j)+KE(i-1,j))
52	& )(1.-maskDown)uFld(i,j)
53	ENDDO
54	ENDDO
55
56	RETURN
57	END