MixtGasLiq_P.F90

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!
! Purpose: Collect relations for mixture pressure for gas-liquid model.
!
! Description: None.
!
! Notes: 
!   1. Use Dz instead of Do because of conflict with DO keyword in Fortran.
!
! ******************************************************************************
!
! $Id: MixtGasLiq_P.F90,v 1.3 2008/12/06 08:44:09 mtcampbe Exp $
!
! Copyright: (c) 2006 by the University of Illinois
!
! ******************************************************************************

FUNCTION mixtgasliq_p(DYl,DYv,DYg,Cl2,Cv2,Cg2,D,Dz,Po,To,Bp,Bt,T)

  USE moddatatypes

  IMPLICIT NONE
  
  REAL(RFREAL), INTENT(IN) :: bp,bt,cg2,cl2,cv2,d,dz,dyg,dyl,dyv,po,t,to
  REAL(RFREAL) :: mixtgasliq_p

  REAL(RFREAL) :: term1,term2
     
  term1 = cl2*(dz + bt*(t-to) - bp*po - dyl) - (dyv*cv2 + dyg*cg2)
  term2 = 4.0_rfreal*cl2*(dz + bt*(t-to) - bp*po)*(dyv*cv2 + dyg*cg2)

  mixtgasliq_p = 0.5_rfreal*(-term1 + sqrt(term1*term1 + term2))

END FUNCTION mixtgasliq_p

! ******************************************************************************
!
! RCS Revision history:
!
! $Log: MixtGasLiq_P.F90,v $
! Revision 1.3  2008/12/06 08:44:09  mtcampbe
! Updated license.
!
! Revision 1.2  2008/11/19 22:17:22  mtcampbe
! Added Illinois Open Source License/Copyright
!
! Revision 1.1  2006/03/26 20:20:50  haselbac
! Initial revision
!
! ******************************************************************************