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dgoldberg |
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C $Header: /u/gcmpack/MITgcm_contrib/dgoldberg/streamice/streamice_advect_thickness_x.F,v 1.4 2012/09/18 17:06:48 dgoldberg Exp $ |
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C $Name: $ |
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#include "STREAMICE_OPTIONS.h" |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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SUBROUTINE STREAMICE_ADV_FLUX_FL_X ( myThid , |
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I UADV , |
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I TRAC , |
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I BC_FACEMASK, |
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I BC_XVALUES, |
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O XFLUX, |
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I time_step ) |
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IMPLICIT NONE |
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C O hflux_x ! flux per unit width across face |
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C O h |
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C I time_step |
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C === Global variables === |
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#include "SIZE.h" |
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#include "GRID.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "STREAMICE.h" |
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#ifdef ALLOW_AUTODIFF_TAMC |
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# include "tamc.h" |
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#endif |
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!#include "GAD_FLUX_LIMITER.h" |
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INTEGER myThid |
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_RL UADV (1-Olx:sNx+Olx,1-Oly:sNy+Oly,nSx,nSy) |
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_RL TRAC (1-Olx:sNx+Olx,1-Oly:sNy+Oly,nSx,nSy) |
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_RL BC_FACEMASK (1-Olx:sNx+Olx,1-Oly:sNy+Oly,nSx,nSy) |
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_RL BC_XVALUES (1-Olx:sNx+Olx,1-Oly:sNy+Oly,nSx,nSy) |
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_RL XFLUX (1-Olx:sNx+Olx,1-Oly:sNy+Oly,nSx,nSy) |
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_RL time_step |
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#ifdef ALLOW_STREAMICE |
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C LOCAL VARIABLES |
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INTEGER i, j, bi, bj, Gi, Gj, k |
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_RL uface, phi, cfl, Cr, rdenom, d0, d1, psi |
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_RL stencil (-1:1) |
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LOGICAL H0_valid(1-Olx:sNx+Olx,1-Oly:sNy+Oly,nSx,nSy) |
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! there are valid cells to calculate a |
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! slope-limited 2nd order flux |
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_RL SLOPE_LIMITER |
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! _RL total_vol_out |
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external SLOPE_LIMITER |
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! total_vol_out = 0.0 |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO j=1-oly,sNy+oly |
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DO i=1-olx,sNx+olx |
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H0_valid(i,j,bi,bj)=.false. |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO j=1-3,sNy+3 |
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Gj = (myYGlobalLo-1)+(bj-1)*sNy+j |
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IF (((Gj .ge. 1) .and. (Gj .le. Ny)) |
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& .or.STREAMICE_NS_PERIODIC) THEN |
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DO i=1-1,sNx+2 |
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C THESE ARRAY BOUNDS INSURE THAT AFTER THIS STEP, |
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C VALUES WILL BE RELIABLE 1 GRID CELLS OUT IN THE |
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C X DIRECTION AND 3 CELLS OUT IN THE Y DIR |
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IF ((STREAMICE_hmask(i,j,bi,bj).eq.1.0) .or. |
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& ((STREAMICE_hmask(i-1,j,bi,bj).eq.1.0) .and. |
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& (STREAMICE_hmask(i,j,bi,bj).ne.1.0))) THEN |
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Gi = (myXGlobalLo-1)+(bi-1)*sNx+i |
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uface = UADV(i,j,bi,bj) |
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cfl = ABS(uface) * time_step * recip_dxC(i,j,bi,bj) |
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IF (BC_FACEMASK(i,j,bi,bj).eq.3.0 .and. |
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& uface.gt.0 .and. |
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& STREAMICE_hmask(i,j,bi,bj).eq.1.0) THEN |
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XFLUX (i,j,bi,bj) = BC_XVALUES(i,j,bi,bj) * uface |
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ELSEIF |
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& (BC_FACEMASK(i,j,bi,bj).eq.3.0 .and. |
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& uface.le.0 .and. |
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& STREAMICE_hmask(i-1,j,bi,bj).eq.1.0) THEN |
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XFLUX (i,j,bi,bj) = BC_XVALUES(i,j,bi,bj) * uface |
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ELSE |
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IF (uface .gt. 0. _d 0) THEN |
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DO k=-1,1 |
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stencil (k) = TRAC(i+k-1,j,bi,bj) |
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ENDDO |
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IF ((STREAMICE_hmask(i,j,bi,bj).eq.1.0) .and. |
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& (STREAMICE_hmask(i-2,j,bi,bj).eq.1.0)) |
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& H0_valid(i,j,bi,bj)=.true. |
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IF (((Gi.eq.1).and.(STREAMICE_hmask(i-1,j,bi,bj).eq.3.0)) |
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& .and.(.not.STREAMICE_EW_PERIODIC)) |
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& THEN ! we are at western bdry and there is a thick. bdry cond |
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XFLUX (i,j,bi,bj) = TRAC(i-1,j,bi,bj) * uface |
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ELSEIF (H0_valid(i,j,bi,bj)) THEN |
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rdenom = (stencil(1)-stencil(0)) |
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IF (rdenom .ne. 0.) THEN |
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Cr = (stencil(0)-stencil(-1))/rdenom |
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ELSE |
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Cr = 1.E20 * (stencil(0)-stencil(-1)) |
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ENDIF |
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IF (STREAMICE_ADV_SCHEME.ne.'DST3') THEN |
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! phi = SLOPE_LIMITER(stencil(0)-stencil(-1), |
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! & stencil(1)-stencil(0)) |
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phi = SLOPE_LIMITER (Cr) |
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ELSE |
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d0 = (2.-cfl)*(1.-cfl)/6.0 |
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d1 = (1.-cfl**2)/6.0 |
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psi = d0+d1*Cr |
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phi = MAX(0. _d 0,MIN(MIN(1. _d 0,psi), |
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& Cr*(1. _d 0 -CFL)/(CFL+1. _d -20) )) |
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ENDIF |
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IF (STREAMICE_ADV_SCHEME.ne.'DST3') THEN |
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XFLUX (i,j,bi,bj) = uface * |
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& (stencil(0) + phi * .5 * (1.0-cfl) * |
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& (stencil(1)-stencil(0))) |
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ELSE |
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XFLUX (i,j,bi,bj) = uface * |
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& (stencil(0) + phi * |
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& (stencil(1)-stencil(0))) |
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ENDIF |
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ELSE ! one of the two cells needed for a HO scheme is missing, use FO scheme |
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XFLUX (i,j,bi,bj) = uface * stencil(0) |
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ENDIF |
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ELSE ! uface <= 0 |
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DO k=-1,1 |
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stencil (k) = TRAC(i-k,j,bi,bj) |
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ENDDO |
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IF ((STREAMICE_hmask(i-1,j,bi,bj).eq.1.0) .and. |
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& (STREAMICE_hmask(i+1,j,bi,bj).eq.1.0)) |
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& H0_valid(i,j,bi,bj)=.true. |
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IF (((Gi.eq.Nx).and.(STREAMICE_hmask(i+1,j,bi,bj).eq.3.0)) |
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& .and.(.not.STREAMICE_EW_PERIODIC)) |
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& THEN ! we are at western bdry and there is a thick. bdry cond |
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XFLUX (i,j,bi,bj) = TRAC(i+1,j,bi,bj) * uface |
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ELSEIF (H0_valid(i,j,bi,bj)) THEN |
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rdenom = (stencil(1)-stencil(0)) |
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IF (rdenom .ne. 0.) THEN |
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Cr = (stencil(0)-stencil(-1))/rdenom |
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ELSE |
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Cr = 1.E20 * (stencil(0)-stencil(-1)) |
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ENDIF |
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IF (STREAMICE_ADV_SCHEME.ne.'DST3') THEN |
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! phi = SLOPE_LIMITER(stencil(0)-stencil(-1), |
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! & stencil(1)-stencil(0)) |
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phi = SLOPE_LIMITER (Cr) |
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ELSE |
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d0 = (2.-cfl)*(1.-cfl)/6.0 |
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d1 = (1.-cfl**2)/6.0 |
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psi = d0+d1*Cr |
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phi = MAX(0. _d 0,MIN(MIN(1. _d 0,psi), |
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& Cr*(1. _d 0 -CFL)/(CFL+1. _d -20) )) |
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ENDIF |
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IF (STREAMICE_ADV_SCHEME.ne.'DST3') THEN |
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XFLUX (i,j,bi,bj) = uface * |
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& (stencil(0) + phi * .5 * (1.0-cfl) * |
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& (stencil(1)-stencil(0))) |
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ELSE |
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XFLUX (i,j,bi,bj) = uface * |
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& (stencil(0) + phi * |
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& (stencil(1)-stencil(0))) |
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ENDIF |
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ELSE ! one of the two cells needed for a HO scheme is missing, use FO scheme |
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Xflux (i,j,bi,bj) = uface * stencil(0) |
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ENDIF |
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ENDIF |
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ENDIF |
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ENDIF |
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ENDDO |
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ENDIF |
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ENDDO |
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ENDDO |
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ENDDO |
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!C X-FLUXES AT CELL BOUNDARIES CALCULATED; NOW TAKE FLUX DIVERGENCE TO INCREMENT THICKNESS |
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! |
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! DO bj=myByLo(myThid),myByHi(myThid) |
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! DO bi=myBxLo(myThid),myBxHi(myThid) |
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! DO j=1-3,sNy+3 |
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! Gj = (myYGlobalLo-1)+(bj-1)*sNy+j |
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! IF ((Gj .ge. 1) .and. (Gj .le. Ny)) THEN |
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! DO i=1-2,sNx+2 |
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! IF (STREAMICE_hmask(i,j,bi,bj).eq.1.0) THEN |
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! h(i,j,bi,bj) = h(i,j,bi,bj) - time_step * |
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! & (hflux_x(i+1,j,bi,bj)*dyG(i+1,j,bi,bj) - |
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! & hflux_x(i,j,bi,bj)*dyG(i,j,bi,bj)) * |
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! & recip_rA (i,j,bi,bj) |
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! ENDIF |
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! ENDDO |
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! ENDIF |
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! ENDDO |
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! ENDDO |
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! ENDDO |
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#endif |
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RETURN |
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END SUBROUTINE STREAMICE_ADV_FLUX_FL_X |
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