RADI_FlimEmsInit.F90

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!******************************************************************************
!
! Purpose: set initial solution field to radiant Energy transport equation, 
!          if any (selected model is FLDTRAN), for first EMS stage,
!          and initiate dissipation at stages > 1.
!
! Description: none.
!
! Input: region = data of current region,
!        iStage = current EMS stage.
!
! Output: region%levels%radi = initial values
!
! Notes: none.
!
!******************************************************************************
!
! $Id: RADI_FlimEmsInit.F90,v 1.3 2008/12/06 08:44:37 mtcampbe Exp $
!
! Copyright: (c) 2003 by the University of Illinois
!
!******************************************************************************

SUBROUTINE radi_flimemsinit( region, istage )

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

#include "Indexing.h"
#endif

  IMPLICIT NONE

! ... parameters
  TYPE(t_region) :: region
  
  INTEGER, INTENT(IN) :: istage

! ... loop variables
  INTEGER :: ic, idx

! ... local variables
  TYPE(t_global), POINTER :: global

  INTEGER :: ibc, iec, idxbeg, idxend, ldiss(5)
  REAL(RFREAL) :: blend1, betrk(5)
  REAL(RFREAL), POINTER :: rcv(:,:), rcvold(:,:), rdiss(:,:)
  
#ifdef RFLO
  INTEGER :: idcbeg, idcend, jdcbeg, jdcend, kdcbeg, kdcend
  INTEGER :: ilev, icoff, ijcoff
#endif

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

  global => region%global

  CALL registerfunction( global,'RADI_FlimEmsInit',&
  'RADI_FlimEmsInit.F90' )
  
! get parameters, dimensions and pointers -------------------------------------

  ldiss(:) = region%mixtInput%ldiss(:)
  betrk(:) = region%mixtInput%betrk(:)

#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)

  rcv     => region%levels(ilev)%radi%cv
  rcvold  => region%levels(ilev)%radi%cvOld
  rdiss   => region%levels(ilev)%radi%diss
#endif

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

  rcv     => region%radi%cv
  rcvold  => region%radi%cvOld
  rdiss   => region%radi%diss
#endif

! select start and end index of 1st dimension depending on RADI model selected

  IF (region%radiInput%radiModel == radi_model_fldtran) THEN
    idxbeg = cv_radi_ener
    idxend = cv_radi_ener
  ENDIF

! store previous solution and initialize dissipation --------------------------
  
  IF (istage == 1) THEN
    DO ic=ibc,iec
      DO idx=idxbeg, idxend
        rcvold(idx,ic) = rcv(idx,ic)
        rdiss(idx,ic)  = 0._rfreal
      ENDDO
    ENDDO
  ENDIF
  IF (istage>1 .AND. ldiss(istage)/=0) THEN
    blend1 = 1._rfreal - betrk(istage)
    DO ic=ibc,iec
      DO idx=idxbeg, idxend
        rdiss(idx,ic) = blend1*rdiss(idx,ic)
      ENDDO
    ENDDO
  ENDIF ! iStage

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

  CALL deregisterfunction( global )

END SUBROUTINE radi_flimemsinit

!******************************************************************************
!
! RCS Revision history:
!
! $Log: RADI_FlimEmsInit.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
!
!
!
!******************************************************************************