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C $Header: $ |
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C $Name: $ |
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|
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# include "GAD_OPTIONS.h" |
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|
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C-- File gad_osc_hat_x.F: Routines ??? |
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C-- Contents |
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C-- o GAD_OSC_LOC_X |
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C-- o GAD_OSC_HAT_X |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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SUBROUTINE GAD_OSC_LOC_X(ix,mask,fbar,ohat) |
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|
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implicit none |
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|
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C =============================================== global variables |
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# include "SIZE.h" |
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|
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C ====================================================== arguments |
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integer ix |
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_RL mask(1-OLx:sNx+OLx) |
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_RL fbar(1-OLx:sNx+OLx) |
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_RL ohat(1:2, |
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& 1-OLx:sNx+OLx) |
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|
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C ====================================================== variables |
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_RL floc(-2:+2) |
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|
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if (ix.gt. +1-OLx .and. |
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& ix.lt.sNx+OLx) then |
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|
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C ================ mask local stencil: expand from centre outwards |
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|
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floc(+0) = fbar(+0+ix) |
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|
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floc(-1) = floc(+0) + |
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& mask(ix-1)*(fbar(ix-1)-floc(+0)) |
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floc(+1) = floc(+0) + |
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& mask(ix+1)*(fbar(ix+1)-floc(+0)) |
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|
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C ================ calc. 1st & 2nd derivatives over masked stencil |
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|
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ohat(+1,ix) = floc(+1)*0.25 _d 0 |
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& - floc(-1)*0.25 _d 0 |
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|
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ohat(+2,ix) = floc(+1)*0.25 _d 0 |
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& - floc(+0)*0.50 _d 0 |
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& + floc(-1)*0.25 _d 0 |
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|
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else |
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|
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if (ix.eq. +1-OLx) then |
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|
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C ================ mask local stencil: expand from centre outwards |
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|
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floc(+0) = fbar(+0+ix) |
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|
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floc(+1) = floc(+0) + |
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& mask(ix+1)*(fbar(ix+1)-floc(+0)) |
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floc(+2) = floc(+1) + |
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& mask(ix+2)*(fbar(ix+2)-floc(+1)) |
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|
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C ================ calc. 1st & 2nd derivatives over masked stencil |
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|
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ohat(+1,ix) = floc(+1)*0.50 _d 0 |
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& - floc(+0)*0.50 _d 0 |
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|
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ohat(+2,ix) = floc(+2)*0.25 _d 0 |
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& - floc(+1)*0.50 _d 0 |
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& + floc(+0)*0.25 _d 0 |
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|
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end if |
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|
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if (ix.eq.sNx+OLx) then |
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|
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C ================ mask local stencil: expand from centre outwards |
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|
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floc(+0) = fbar(+0+ix) |
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|
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floc(-1) = floc(+0) + |
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& mask(ix-1)*(fbar(ix-1)-floc(+0)) |
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floc(-2) = floc(-1) + |
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& mask(ix-2)*(fbar(ix-2)-floc(-1)) |
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|
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C ================ calc. 1st & 2nd derivatives over masked stencil |
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|
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ohat(+1,ix) = floc(+0)*0.50 _d 0 |
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& - floc(-1)*0.50 _d 0 |
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|
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ohat(+2,ix) = floc(+0)*0.25 _d 0 |
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& - floc(-1)*0.50 _d 0 |
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& + floc(-2)*0.25 _d 0 |
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|
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end if |
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|
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end if |
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|
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return |
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|
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c end subroutine GAD_OSC_LOC_X |
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end |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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SUBROUTINE GAD_OSC_HAT_X(bi,bj,kk,iy, |
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& mask,fbar,ohat,myThid) |
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C |================================================================| |
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C | OSC_HAT_X: compute WENO oscillation derivatives in X. | |
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C |================================================================| |
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|
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implicit none |
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|
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C =============================================== global variables |
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# include "SIZE.h" |
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|
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C ====================================================== arguments |
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integer bi,bj,kk,iy |
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_RL mask(1-OLx:sNx+OLx) |
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_RL fbar(1-OLx:sNx+OLx) |
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_RL ohat(1:2, |
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& 1-OLx:sNx+OLx) |
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integer myThid |
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|
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C ====================================================== variables |
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integer ix |
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|
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C ================================ derivatives for WENO indicators |
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do ix = 1-OLx+0, sNx+OLx-0 |
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|
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CALL GAD_OSC_LOC_X(ix,mask,fbar,ohat) |
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|
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end do |
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|
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return |
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|
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c end subroutine GAD_OSC_HAT_X |
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end |
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