RFLU_InvFlux_I.F90

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! ******************************************************************************
!
! Purpose: Compute convective fluxes using centered scheme.
!
! Description: None.
!
! Input:
!   pRegion                Pointer to region data
!
! Output: None.
!
! Notes: None.
!
! ******************************************************************************
!
! $Id: RFLU_InvFlux_I.F90,v 1.3 2008/12/06 08:44:30 mtcampbe Exp $
!
! Copyright: (c) 2004 by the University of Illinois
!
! ******************************************************************************

SUBROUTINE rflu_invflux_i(pRegion)

  USE moddatatypes
  USE modglobal, ONLY: t_global
  USE modgrid, ONLY: t_grid
  USE moddatastruct, ONLY: t_region
  USE moderror
  USE modparameters

  USE modinterfaces, ONLY: rflu_centralfirstpatch, & 
                           rflu_getcvloc

  IMPLICIT NONE

! ******************************************************************************
! Definitions and declarations
! ******************************************************************************

! ==============================================================================
! Arguments
! ==============================================================================

  TYPE(t_region), POINTER :: pregion

! ==============================================================================
! Locals
! ==============================================================================

  CHARACTER(CHRLEN) :: rcsidentstring
  INTEGER :: cvmixtxvel,cvmixtyvel,cvmixtzvel,c1,c2,ifg,ipatch
  REAL(RFREAL) :: term
  REAL(RFREAL) :: flx(3)
  REAL(RFREAL), DIMENSION(:), POINTER :: pvf
  REAL(RFREAL), DIMENSION(:,:), POINTER :: pcv,prhs
  TYPE(t_global), POINTER :: global
  TYPE(t_grid), POINTER :: pgrid

! ******************************************************************************
! Start
! ******************************************************************************

  rcsidentstring = '$RCSfile: RFLU_InvFlux_I.F90,v $ $Revision: 1.3 $'

  global => pregion%global

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

! ******************************************************************************
! Set dimensions and pointers
! ******************************************************************************

  pgrid => pregion%grid

  pcv  => pregion%mixt%cv
  prhs => pregion%mixt%rhs
  pvf  => pregion%mixt%vfMixt    

  cvmixtxvel = rflu_getcvloc(global,fluid_model_incomp,cv_mixt_xvel)
  cvmixtyvel = rflu_getcvloc(global,fluid_model_incomp,cv_mixt_yvel)
  cvmixtzvel = rflu_getcvloc(global,fluid_model_incomp,cv_mixt_zvel)

! ******************************************************************************
! Compute fluxes through interior faces
! ******************************************************************************

  DO ifg = 1,pgrid%nFaces
    c1 = pgrid%f2c(1,ifg)
    c2 = pgrid%f2c(2,ifg)

    term = 0.5_rfreal*pvf(ifg)*pgrid%fn(xyzmag,ifg)        

    flx(1) = pcv(cvmixtxvel,c2)*term
    flx(2) = pcv(cvmixtyvel,c2)*term
    flx(3) = pcv(cvmixtzvel,c2)*term

    prhs(cvmixtxvel,c1) = prhs(cvmixtxvel,c1) - flx(1)
    prhs(cvmixtyvel,c1) = prhs(cvmixtyvel,c1) - flx(2)
    prhs(cvmixtzvel,c1) = prhs(cvmixtzvel,c1) - flx(3)

    flx(1) = -pcv(cvmixtxvel,c1)*term
    flx(2) = -pcv(cvmixtyvel,c1)*term
    flx(3) = -pcv(cvmixtzvel,c1)*term

    prhs(cvmixtxvel,c2) = prhs(cvmixtxvel,c2) - flx(1)
    prhs(cvmixtyvel,c2) = prhs(cvmixtyvel,c2) - flx(2)
    prhs(cvmixtzvel,c2) = prhs(cvmixtzvel,c2) - flx(3)
  END DO ! ifg

! ******************************************************************************
! Compute fluxes through boundary faces
! ******************************************************************************

! TO DO 
!  DO iPatch = 1,region%grid%nPatches
!    CALL RFLU_CentralFirstPatch(region,region%patches(iPatch))
!  END DO ! iPatch
! END TO DO 

! ******************************************************************************
! End
! ******************************************************************************

  CALL deregisterfunction(global)

END SUBROUTINE rflu_invflux_i

! ******************************************************************************
!
! RCS Revision history:
!
! $Log: RFLU_InvFlux_I.F90,v $
! Revision 1.3  2008/12/06 08:44:30  mtcampbe
! Updated license.
!
! Revision 1.2  2008/11/19 22:17:42  mtcampbe
! Added Illinois Open Source License/Copyright
!
! Revision 1.1  2004/12/19 15:41:11  haselbac
! Initial revision
!
! ******************************************************************************