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C $Header$ |
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C $Name$ |
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#include "CPP_OPTIONS.h" |
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SUBROUTINE MOM_U_BOTTOMDRAG( |
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I bi,bj,k, |
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I uFld, KE, KappaRU, |
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O uDragTerms, |
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I myThid) |
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IMPLICIT NONE |
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C |
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C Calculate bottom drag terms for U eqn |
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C - is not vector invariant ... |
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C |
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C == Global variables == |
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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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C == Routine arguments == |
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INTEGER bi,bj,k |
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_RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL KE(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL KappaRU(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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_RL uDragTerms(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL viscFac |
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INTEGER myThid |
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C == Local variables == |
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INTEGER I,J,Kp1 |
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_RL rdrckp1,maskDown |
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C- No-slip BCs impose a drag at bottom |
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Kp1=min(k+1,Nr) |
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rdrckp1=recip_drC(kp1) |
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IF (k.EQ.Nr) rdrckp1=recip_drF(k) |
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viscFac=1. |
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IF (.NOT. no_slip_bottom) viscFac=0. |
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DO j=1-Oly,sNy+Oly-1 |
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DO i=1-Olx+1,sNx+Olx-1 |
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maskDown=_maskW(i,j,kp1,bi,bj) |
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IF (k.EQ.Nr) maskDown=0. |
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uDragTerms(i,j)= |
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& -_recip_hFacW(i,j,k,bi,bj)*recip_drF(k) |
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& *( |
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& 2.*KappaRU(i,j,kp1)*rkFac*rdrckp1*viscFac |
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& + bottomDragLinear |
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& + bottomDragQuadratic*sqrt(KE(i,j)+KE(i-1,j)) |
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& )*(1.-maskDown)*uFld(i,j) |
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ENDDO |
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ENDDO |
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RETURN |
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END |
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