DATE     96/10/08


    Opérateur PPRE                                      voir aussiBIF 
    ______________



    SYNTAXE (EQEX) : Cf opérateur EQEX
    _______________


    'OPER' PPRE  'VN' Rrho




  Description: The PPRE operator computes the pressure gradient term
               for the particle qdm equation.

               It computes the term: grad(P) * rhog / rhop

  Syntax (EQEX) :

     'OPER'     PPRE  'VN'  Rrho


  Rrho   FLOTTANT ratio  gas density / particle density
  VN     MOT      CHPOINT (VECT SOMMET) in table INCO for the
                  particle velocity