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C $Header: $ |
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C $Name: $ |
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#include "MOM_FLUXFORM_OPTIONS.h" |
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CBOP |
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C !ROUTINE: MOM_UV_BOUNDARY |
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C !INTERFACE: ========================================================== |
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SUBROUTINE MOM_UV_BOUNDARY ( |
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I bi,bj,k, |
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I uFld, vFld, |
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O uBnd, vBnd, |
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I myTime, myIter, myThid ) |
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|
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C !DESCRIPTION: |
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C Set velocity at a boundary for a momentum conserving advection |
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C Note: really conserve momentum when "steps" (vertical plane) |
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C or coastline (horizontal plane) are only 1 grid-point wide. |
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|
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C !USES: =============================================================== |
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C == Global variables == |
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IMPLICIT NONE |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "GRID.h" |
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|
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C !INPUT PARAMETERS: =================================================== |
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C bi,bj :: tile indices |
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C k :: vertical level |
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C uFld :: zonal velocity |
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C vFld :: meridional velocity |
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C myTime :: current time |
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C myIter :: current iteration number |
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C myThid :: My Thread Id. number |
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INTEGER bi,bj |
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INTEGER k |
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_RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy) |
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_RL vFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy) |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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|
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C !OUTPUT PARAMETERS: ================================================== |
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C uBnd :: zonal velocity extended to boundaries |
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C vBnd :: meridional velocity extended to boundaries |
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_RL uBnd(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL vBnd(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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|
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#ifdef MOM_BOUNDARY_CONSERVE |
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C !LOCAL VARIABLES: ==================================================== |
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C i,j :: loop indices |
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INTEGER i,j |
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INTEGER km1,kp1 |
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_RL maskM1, maskP1 |
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_RL uTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL vTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL aBndU(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL aBndV(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL aBndW(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL tmpVar |
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LOGICAL useMomBndConserve |
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PARAMETER ( useMomBndConserve = .TRUE. ) |
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CEOP |
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|
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C Initialise output array |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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uBnd(i,j) = uFld(i,j,k,bi,bj) |
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vBnd(i,j) = vFld(i,j,k,bi,bj) |
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ENDDO |
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ENDDO |
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|
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IF ( useMomBndConserve ) THEN |
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C- Initialise intermediate arrays: |
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km1 = MAX( k-1, 1 ) |
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kp1 = MIN( k+1, Nr ) |
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maskM1 = 1. |
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maskP1 = 1. |
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IF ( k.EQ.1 ) maskM1 = 0. |
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IF ( k.EQ.Nr ) maskP1 = 0. |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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aBndU(i,j) = 0. |
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aBndV(i,j) = 0. |
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aBndW(i,j) = 0. |
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ENDDO |
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ENDDO |
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|
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C- Calculate Divergence in 3 directions: |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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uTrans(i,j) = uFld(i,j,k,bi,bj) |
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& * dyG(i,j,bi,bj)*deepFacC(k) |
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& * drF(k)*hFacW(i,j,k,bi,bj)*rhoFacC(k) |
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vTrans(i,j) = vFld(i,j,k,bi,bj) |
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& * dxG(i,j,bi,bj)*deepFacC(k) |
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& * drF(k)*hFacS(i,j,k,bi,bj)*rhoFacC(k) |
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ENDDO |
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ENDDO |
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DO j=1-OLy,sNy+OLy-1 |
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DO i=1-OLx,sNx+OLx-1 |
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aBndU(i,j) = uTrans(i+1,j)-uTrans(i,j) |
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aBndV(i,j) = vTrans(i,j+1)-vTrans(i,j) |
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aBndW(i,j) = ABS(aBndU(i,j)+aBndV(i,j)) |
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aBndU(i,j) = ABS(aBndU(i,j)) |
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aBndV(i,j) = ABS(aBndV(i,j)) |
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ENDDO |
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ENDDO |
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C- Normalise by the sum: |
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DO j=1-OLy,sNy+OLy-1 |
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DO i=1-OLx,sNx+OLx-1 |
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tmpVar = aBndU(i,j)+aBndV(i,j)+aBndW(i,j) |
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IF ( tmpVar.GT.0. ) THEN |
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tmpVar = 1. _d 0 / tmpVar |
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aBndU(i,j) = aBndU(i,j)*tmpVar |
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aBndV(i,j) = aBndV(i,j)*tmpVar |
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aBndW(i,j) = aBndW(i,j)*tmpVar |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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C- At a boundary, replace uFld,vFld by a weighted average |
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C Note: multiply by 2 to cancel the 1/2 factor in advections S/R |
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DO j=1-OLy+1,sNy+OLy-1 |
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DO i=1-OLx+1,sNx+OLx-1 |
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IF (maskW(i,j,k,bi,bj).EQ.0.) THEN |
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C Note: only 1 set of aBnd_U,V,W is non-zero (either i-1 or i) |
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C and only 1 uFld is non-zero (either i-1 or i+1) |
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C and only 1 uFld is non-zero (either k-1 or k+1) |
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uBnd(i,j) = ( |
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& (aBndU(i-1,j)+aBndU(i,j)) |
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& *(uFld(i-1,j,k,bi,bj)+uFld(i+1,j,k,bi,bj)) |
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& +(aBndV(i-1,j)+aBndV(i,j)) |
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& *(uFld(i,j-1,k,bi,bj)+uFld(i,j+1,k,bi,bj)) |
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& +(aBndW(i-1,j)+aBndW(i,j)) |
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& *(uFld(i,j,km1,bi,bj)*maskM1 |
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& +uFld(i,j,kp1,bi,bj)*maskP1) |
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& )*2. _d 0 |
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ENDIF |
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IF (maskS(i,j,k,bi,bj).EQ.0.) THEN |
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C Note: only 1 set of aBnd_U,V,W is non-zero (either j-1 or j) |
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C and only 1 vFld is non-zero (either j-1 or j+1) |
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C and only 1 vFld is non-zero (either k-1 or k+1) |
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vBnd(i,j) = ( |
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& (aBndU(i,j-1)+aBndU(i,j)) |
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& *(vFld(i-1,j,k,bi,bj)+vFld(i+1,j,k,bi,bj)) |
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& +(aBndV(i,j-1)+aBndV(i,j)) |
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& *(vFld(i,j-1,k,bi,bj)+vFld(i,j+1,k,bi,bj)) |
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& +(aBndW(i,j-1)+aBndW(i,j)) |
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& *(vFld(i,j,km1,bi,bj)*maskM1 |
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& +vFld(i,j,kp1,bi,bj)*maskP1) |
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& )*2. _d 0 |
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ENDIF |
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ENDDO |
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ENDDO |
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ENDIF |
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#endif /* MOM_BOUNDARY_CONSERVE */ |
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|
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RETURN |
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END |
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