RADI_FlimEmsUpdate.F90

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!******************************************************************************
!
! Purpose: update FLD radiation solution for steady flow or dual time-stepping
!          using explicit multistage scheme
!
! Description: none.
!
! Input: region = data of current region,
!
! Output: region%levels%radi%cv = new solution after each stage.
!
! Notes: none.
!
!******************************************************************************
!
! $Id: RADI_FlimEmsUpdate.F90,v 1.3 2008/12/06 08:44:37 mtcampbe Exp $
!
! Copyright: (c) 2003 by the University of Illinois
!
!******************************************************************************

SUBROUTINE radi_flimemsupdate( region )

  USE moddatatypes
  USE moddatastruct, ONLY : t_region
  USE modglobal, ONLY     : t_global
  USE moderror
  USE modparameters
  USE radi_modparameters
#ifdef RFLO
  USE modinterfaces, ONLY : rflo_getdimensdummy, rflo_getcelloffset, &
                            rflo_extrapintcellvec

#include "Indexing.h"
#endif

  IMPLICIT NONE

! ... parameters
  TYPE(t_region) :: region

! ... loop variables
  INTEGER :: ic, idx
  
! ... local variables
  TYPE(t_global), POINTER :: global

  INTEGER :: istage, ibc, iec, idxb, idxe
  REAL(RFREAL), POINTER :: cv(:,:), cvold(:,:), rhs(:,:)
  REAL(RFREAL), POINTER :: vol(:), dt(:)
  REAL(RFREAL)          :: ark(5), fac, adtv, cfl

#ifdef RFLO
  INTEGER :: idcbeg, idcend, jdcbeg, jdcend, kdcbeg, kdcend
  INTEGER :: ilev, icoff, ijcoff
#endif

!******************************************************************************

  global => region%global

  CALL registerfunction( global,'RADI_FlimEmsUpdate',&
  'RADI_FlimEmsUpdate.F90' )

! get parameters, dimensions and pointers -------------------------------------

  istage = region%irkStep
  ark(:) = region%mixtInput%ark(:)
  cfl    = region%mixtInput%cfl

  IF (region%radiInput%radiModel == radi_model_fldtran) THEN
    idxb = cv_radi_ener
    idxe = cv_radi_ener
  ENDIF

#ifdef RFLO
  ilev  = region%currLevel

  CALL rflo_getdimensdummy( region,ilev,idcbeg,idcend, &
                            jdcbeg,jdcend,kdcbeg,kdcend )
  CALL rflo_getcelloffset( region,ilev,icoff,ijcoff )
  ibc = indijk(idcbeg,jdcbeg,kdcbeg,icoff,ijcoff)
  iec = indijk(idcend,jdcend,kdcend,icoff,ijcoff)

  cv     => region%levels(ilev)%radi%cv
  cvold  => region%levels(ilev)%radi%cvOld
  rhs    => region%levels(ilev)%radi%rhs
  vol    => region%levels(ilev)%grid%vol
  dt     => region%levels(ilev)%dt
#endif

#ifdef RFLU
  ibc = 1
  iec = region%grid%nCellsTot        

  cv     => region%radi%cv
  cvold  => region%radi%cvOld
  rhs    => region%radi%rhs
  vol    => region%grid%vol
  dt     => region%dt
#endif

! update FLD radiation solution ------------------------------------------------

  fac = ark(istage)*cfl
  DO ic = ibc,iec
    adtv  = fac*dt(ic)/vol(ic)
    DO idx = idxb,idxe
      rhs(idx,ic) = adtv*rhs(idx,ic)
    ENDDO
  ENDDO

  IF (global%solverType == solv_implicit) THEN
    fac = 1.5_rfreal*ark(istage)*cfl/global%dtMin
    DO ic = ibc,iec
      adtv = 1._rfreal/(1._rfreal+fac*dt(ic))
      DO idx = idxb,idxe
        cv(idx,ic) = cvold(idx,ic) - adtv*rhs(idx,ic)
      ENDDO
    ENDDO
  ELSE
    DO ic=ibc,iec
      DO idx = idxb,idxe
        cv(idx,ic) = cvold(idx,ic) - rhs(idx,ic)
      ENDDO
    ENDDO
  ENDIF

! extrapolate solution to dummy cells

#ifdef RFLO
  CALL rflo_extrapintcellvec( region,idxb,idxe,cv )
#endif
#ifdef RFLU
!  CALL RFLU_ExtrapIntCellVec( region,idxb,idxe,cv )
#endif

! finalize --------------------------------------------------------------------

  CALL deregisterfunction( global )

END SUBROUTINE radi_flimemsupdate

!******************************************************************************
!
! RCS Revision history:
!
! $Log: RADI_FlimEmsUpdate.F90,v $
! Revision 1.3  2008/12/06 08:44:37  mtcampbe
! Updated license.
!
! Revision 1.2  2008/11/19 22:17:50  mtcampbe
! Added Illinois Open Source License/Copyright
!
! Revision 1.1  2004/09/30 17:49:10  wasistho
! prepared for full FLD radiation model
!
!
!
!******************************************************************************