| 1 |
C $Header: /u/gcmpack/models/MITgcmUV/model/src/update_cg2d.F,v 1.1 2001/08/27 18:50:10 jmc Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "CPP_OPTIONS.h" |
| 5 |
CBOP |
| 6 |
C !ROUTINE: UPDATE_CG2D |
| 7 |
C !INTERFACE: |
| 8 |
SUBROUTINE UPDATE_CG2D( myTime, myIter, myThid ) |
| 9 |
C !DESCRIPTION: \bv |
| 10 |
C *==========================================================* |
| 11 |
C | SUBROUTINE UPDATE_CG2D |
| 12 |
C | o Update 2d conjugate gradient solver operators |
| 13 |
C | account for Free-Surf effect on total column thickness |
| 14 |
C *==========================================================* |
| 15 |
C | This routine is based on INI_CG2D, and simplified. It is |
| 16 |
C | only active when the non-linear free surface mode of |
| 17 |
C | equations is active. |
| 18 |
C *==========================================================* |
| 19 |
C \ev |
| 20 |
|
| 21 |
C !USES: |
| 22 |
IMPLICIT NONE |
| 23 |
C === Global variables === |
| 24 |
#include "SIZE.h" |
| 25 |
#include "EEPARAMS.h" |
| 26 |
#include "PARAMS.h" |
| 27 |
#include "GRID.h" |
| 28 |
#include "SURFACE.h" |
| 29 |
#include "CG2D.h" |
| 30 |
#ifdef ALLOW_OBCS |
| 31 |
#include "OBCS.h" |
| 32 |
#endif |
| 33 |
|
| 34 |
C !INPUT/OUTPUT PARAMETERS: |
| 35 |
C === Routine arguments === |
| 36 |
C myTime - Current time in simulation |
| 37 |
C myIter - Current iteration number in simulation |
| 38 |
C myThid - Thread number for this instance of the routine. |
| 39 |
_RL myTime |
| 40 |
INTEGER myIter |
| 41 |
INTEGER myThid |
| 42 |
|
| 43 |
C !LOCAL VARIABLES: |
| 44 |
#ifdef NONLIN_FRSURF |
| 45 |
C-- Note : compared to "INI_CG2D", no needs to compute again |
| 46 |
C the solver norn=malisation factor of the solver tolerance |
| 47 |
C === Local variables === |
| 48 |
C bi,bj - Loop counters |
| 49 |
C I,J,K |
| 50 |
C faceArea - Temporary used to hold cell face areas. |
| 51 |
INTEGER bi, bj |
| 52 |
INTEGER I, J, K |
| 53 |
_RL faceArea |
| 54 |
_RL aC, aCw, aCs |
| 55 |
CEOP |
| 56 |
|
| 57 |
C-- Initialise laplace operator |
| 58 |
C aW2d: integral in Z Ax/dX |
| 59 |
C aS2d: integral in Z Ay/dY |
| 60 |
DO bj=myByLo(myThid),myByHi(myThid) |
| 61 |
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 62 |
DO J=1,sNy |
| 63 |
DO I=1,sNx |
| 64 |
aW2d(I,J,bi,bj) = 0. _d 0 |
| 65 |
aS2d(I,J,bi,bj) = 0. _d 0 |
| 66 |
ENDDO |
| 67 |
ENDDO |
| 68 |
DO K=1,Nr |
| 69 |
DO J=1,sNy |
| 70 |
DO I=1,sNx |
| 71 |
faceArea = _dyG(I,J,bi,bj)*drF(K) |
| 72 |
& *_hFacW(I,J,K,bi,bj) |
| 73 |
aW2d(I,J,bi,bj) = aW2d(I,J,bi,bj) + |
| 74 |
& faceArea*recip_dxC(I,J,bi,bj) |
| 75 |
faceArea = _dxG(I,J,bi,bj)*drF(K) |
| 76 |
& *_hFacS(I,J,K,bi,bj) |
| 77 |
aS2d(I,J,bi,bj) = aS2d(I,J,bi,bj) + |
| 78 |
& faceArea*recip_dyC(I,J,bi,bj) |
| 79 |
ENDDO |
| 80 |
ENDDO |
| 81 |
ENDDO |
| 82 |
#ifdef ALLOW_OBCS |
| 83 |
IF (useOBCS) THEN |
| 84 |
DO I=1,sNx |
| 85 |
IF (OB_Jn(I,bi,bj).NE.0) aS2d(I,OB_Jn(I,bi,bj),bi,bj)=0. |
| 86 |
IF (OB_Jn(I,bi,bj).NE.0) aS2d(I,OB_Jn(I,bi,bj)+1,bi,bj)=0. |
| 87 |
IF (OB_Js(I,bi,bj).NE.0) aS2d(I,OB_Js(I,bi,bj)+1,bi,bj)=0. |
| 88 |
IF (OB_Js(I,bi,bj).NE.0) aS2d(I,OB_Js(I,bi,bj),bi,bj)=0. |
| 89 |
ENDDO |
| 90 |
DO J=1,sNy |
| 91 |
IF (OB_Ie(J,bi,bj).NE.0) aW2d(OB_Ie(J,bi,bj),J,bi,bj)=0. |
| 92 |
IF (OB_Ie(J,bi,bj).NE.0) aW2d(OB_Ie(J,bi,bj)+1,J,bi,bj)=0. |
| 93 |
IF (OB_Iw(J,bi,bj).NE.0) aW2d(OB_Iw(J,bi,bj)+1,J,bi,bj)=0. |
| 94 |
IF (OB_Iw(J,bi,bj).NE.0) aW2d(OB_Iw(J,bi,bj),J,bi,bj)=0. |
| 95 |
ENDDO |
| 96 |
ENDIF |
| 97 |
#endif |
| 98 |
DO J=1,sNy |
| 99 |
DO I=1,sNx |
| 100 |
aW2d(I,J,bi,bj) = aW2d(I,J,bi,bj)*cg2dNorm |
| 101 |
& *implicSurfPress*implicDiv2DFlow |
| 102 |
aS2d(I,J,bi,bj) = aS2d(I,J,bi,bj)*cg2dNorm |
| 103 |
& *implicSurfPress*implicDiv2DFlow |
| 104 |
ENDDO |
| 105 |
ENDDO |
| 106 |
ENDDO |
| 107 |
ENDDO |
| 108 |
|
| 109 |
C-- Update overlap regions |
| 110 |
c _EXCH_XY_R4(aW2d, myThid) |
| 111 |
c _EXCH_XY_R4(aS2d, myThid) |
| 112 |
CALL EXCH_UV_XY_RS(aW2d,aS2d,.FALSE.,myThid) |
| 113 |
|
| 114 |
C-- Initialise preconditioner |
| 115 |
DO bj=myByLo(myThid),myByHi(myThid) |
| 116 |
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 117 |
DO J=1,sNy |
| 118 |
DO I=1,sNx |
| 119 |
pC(I,J,bi,bj) = 1. _d 0 |
| 120 |
aC = -( |
| 121 |
& aW2d(I,J,bi,bj) + aW2d(I+1,J ,bi,bj) |
| 122 |
& +aS2d(I,J,bi,bj) + aS2d(I ,J+1,bi,bj) |
| 123 |
& +freeSurfFac*cg2dNorm*recip_Bo(I,J,bi,bj)* |
| 124 |
& rA(I,J,bi,bj)/deltaTMom/deltaTMom |
| 125 |
& ) |
| 126 |
aCs = -( |
| 127 |
& aW2d(I,J-1,bi,bj) + aW2d(I+1,J-1,bi,bj) |
| 128 |
& +aS2d(I,J-1,bi,bj) + aS2d(I ,J ,bi,bj) |
| 129 |
& +freeSurfFac*cg2dNorm*recip_Bo(I,J-1,bi,bj)* |
| 130 |
& rA(I,J-1,bi,bj)/deltaTMom/deltaTMom |
| 131 |
& ) |
| 132 |
aCw = -( |
| 133 |
& aW2d(I-1,J,bi,bj) + aW2d(I ,J ,bi,bj) |
| 134 |
& +aS2d(I-1,J,bi,bj) + aS2d(I-1,J+1,bi,bj) |
| 135 |
& +freeSurfFac*cg2dNorm*recip_Bo(I-1,J,bi,bj)* |
| 136 |
& rA(I-1,J,bi,bj)/deltaTMom/deltaTMom |
| 137 |
& ) |
| 138 |
IF ( aC .EQ. 0. ) THEN |
| 139 |
pC(I,J,bi,bj) = 1. _d 0 |
| 140 |
ELSE |
| 141 |
pC(I,J,bi,bj) = 1. _d 0 / aC |
| 142 |
ENDIF |
| 143 |
IF ( aC + aCw .EQ. 0. ) THEN |
| 144 |
pW(I,J,bi,bj) = 0. |
| 145 |
ELSE |
| 146 |
pW(I,J,bi,bj) = |
| 147 |
& -aW2d(I ,J ,bi,bj)/((cg2dpcOffDFac *(aCw+aC))**2 ) |
| 148 |
ENDIF |
| 149 |
IF ( aC + aCs .EQ. 0. ) THEN |
| 150 |
pS(I,J,bi,bj) = 0. |
| 151 |
ELSE |
| 152 |
pS(I,J,bi,bj) = |
| 153 |
& -aS2d(I ,J ,bi,bj)/((cg2dpcOffDFac *(aCs+aC))**2 ) |
| 154 |
ENDIF |
| 155 |
ENDDO |
| 156 |
ENDDO |
| 157 |
ENDDO |
| 158 |
ENDDO |
| 159 |
C-- Update overlap regions |
| 160 |
_EXCH_XY_R4(pC, myThid) |
| 161 |
c _EXCH_XY_R4(pW, myThid) |
| 162 |
c _EXCH_XY_R4(pS, myThid) |
| 163 |
CALL EXCH_UV_XY_RS(pW,pS,.FALSE.,myThid) |
| 164 |
|
| 165 |
#endif /* NONLIN_FRSURF */ |
| 166 |
|
| 167 |
RETURN |
| 168 |
END |
Parent Directory
| 
Revision Log
| 
Revision Graph