PLAG_InjcSetInjection.F90

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!******************************************************************************
!
! Purpose: set the next particle diameter and superparticle loading
!          for the multiphase injection algorithm.
!
! Description: none.
!
! Input: injcDiamDist  = injection model type
!        diam       = particle diameter
!        spLoad     = superparticle loading
!
! Output: diam and spLoad 
!
! Notes: none.
!
!******************************************************************************
!
! $Id: PLAG_InjcSetInjection.F90,v 1.3 2008/12/06 08:44:34 mtcampbe Exp $
!
! Copyright: (c) 2002 by the University of Illinois
!
!******************************************************************************

SUBROUTINE plag_injcsetinjection( region, pTilePlag, iTile, tCoeff,  tSum, &
                                  poolvol,  injectq, ratio )

  USE moddatatypes  
  USE moddatastruct, ONLY : t_region
  USE modglobal, ONLY     : t_global
  USE modrandom, ONLY     : rand1uniform
  USE modpartlag, ONLY    : t_tile_plag
  USE moderror
  USE modparameters
  USE plag_modparameters
  IMPLICIT NONE

! ... parameters
  TYPE(t_region)             :: region
  TYPE(t_tile_plag), POINTER :: ptileplag
  
  INTEGER      :: itile
  LOGICAL      :: injectq 
    
  REAL(RFREAL) :: poolvol, ratio, tcoeff, tsum

! ... loop variables

! ... local variables
  CHARACTER(CHRLEN) :: rcsidentstring
  
  REAL(RFREAL) :: coefratio, pi, poolvolnew, randunif, volpart
  REAL(RFREAL), POINTER, DIMENSION(:,:) :: pdv
  TYPE(t_global), POINTER :: global

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

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

  global => region%global

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

! Set pointer -----------------------------------------------------------------

  pdv => ptileplag%dv
  
! Set particle volume and new pool volume -------------------------------------

  pi = global%pi
  
  volpart    = pi/6.0_rfreal* pdv(dv_tile_diam,itile)**3  
  poolvolnew = poolvol - pdv(dv_tile_spload,itile)*volpart
  
  ratio   = 0.0_rfreal  
  injectq = .false.
  
  IF ( poolvolnew > 0.0_rfreal ) THEN
  
    coefratio = tcoeff/poolvolnew
    tsum      = tsum + coefratio*pdv(dv_tile_countdown,itile) 

    IF ( tsum <= 1.0_rfreal ) THEN
      injectq = .true.
      ratio   = volpart/poolvol
      
      randunif = rand1uniform(region%randData) 
      IF ( randunif <= 0.0_rfreal) THEN         
        pdv(dv_tile_countdown,itile) = 50.0_rfreal 
      ELSE
        pdv(dv_tile_countdown,itile) = -log(randunif)
      END IF ! randUnif
      
    ELSE 
    
! - Decrease time factor to account for time waited in this step --------------

      pdv(dv_tile_countdown,itile) = (tsum-1.0_rfreal)/coefratio 
    
    END IF ! tSum
    
  END IF !poolVolNew  
            
! finalize --------------------------------------------------------------------

  CALL deregisterfunction( global )

END SUBROUTINE plag_injcsetinjection

!******************************************************************************
!
! RCS Revision history:
!
! $Log: PLAG_InjcSetInjection.F90,v $
! Revision 1.3  2008/12/06 08:44:34  mtcampbe
! Updated license.
!
! Revision 1.2  2008/11/19 22:17:46  mtcampbe
! Added Illinois Open Source License/Copyright
!
! Revision 1.1  2004/12/01 20:57:42  fnajjar
! Initial revision after changing case
!
! Revision 1.3  2004/06/16 23:06:33  fnajjar
! Renamed variabled for CRE kernel
!
! Revision 1.2  2003/11/21 22:35:51  fnajjar
! Update Random Number Generator
!
! Revision 1.1  2002/10/25 14:16:31  f-najjar
! Initial Import of Rocpart
!
!******************************************************************************