Champ_front_pression_from_u.cpp

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#include <Champ_front_pression_from_u.h>
#include <TRUSTTrav.h>
#include <Navier_Stokes_std.h>
#include <Domaine_VF.h>
#include <Fluide_Incompressible.h>
#include <Champ_Uniforme.h>
 
Implemente_instanciable(Champ_front_pression_from_u,"Champ_front_pression_from_u",Ch_front_var_instationnaire_dep);
// XD champ_front_pression_from_u front_field_base champ_front_pression_from_u NO_BRACE this field is used to define a
// XD_CONT pressure field depending of a velocity field.
// XD attr expression chaine expression REQ value depending of a velocity (like $2*u_moy^2$).
 
 
 
Sortie& Champ_front_pression_from_u::printOn(Sortie& os) const
{
  return (os);
}
 
 
Entree& Champ_front_pression_from_u::readOn(Entree& is)
{
  fixer_nb_comp(1);
  Nom expr;
  is >> expr;
  fonction_.setNbVar(1);
  fonction_.addVar("u_moy");
  fonction_.setString(expr);
  fonction_.parseString();
  return (is);
}
 
 
 
/*! @brief Updates the time.
 *
 */
 
int Champ_front_pression_from_u::initialiser(double tps, const Champ_Inc_base& inco)
{
  if (!Ch_front_var_instationnaire_dep::initialiser(tps,inco))
    return 0;
 
  ref_inco_=inco;
 
 
 
  // the boundary field retrieves the mean u via div u .... we verify that rho is constant
  int ok=0;
  const Milieu_base& mil=inco.equation().milieu();
  if (sub_type(Fluide_Incompressible,mil))
    {
      if ((sub_type(Champ_Uniforme,mil.masse_volumique())))
        {
 
 
 
          ok=1;
        }
    }
  if (ok==0)
    {
      Cerr<<que_suis_je()<<" is available only for incompressible problem"<<finl;
      exit();
    }
 
 
 
 
  mettre_a_jour(tps);
 
 
  return 1;
}
void  Champ_front_pression_from_u::mettre_a_jour(double tps)
{
  const Champ_Inc_base& inco=ref_inco_.valeur();
  // retrieve the boundary flux from the div operator, which is u
  const Navier_Stokes_std& eqns=ref_cast(Navier_Stokes_std,inco.equation());
  const Operateur_Div& opdiv=eqns.operateur_divergence();
  const Domaine_VF& domaine_VF = ref_cast(Domaine_VF,domaine_dis());
 
  const DoubleTab& Flux0=opdiv->flux_bords();
  if (Flux0.size()==0)
    {
      Cerr<<" Div not yet ready...."<<finl;
      return;
      //   DoubleTrav resu(eqns.div());
      //opdiv.calculer(inco.valeurs(),resu);
    }
  const DoubleTab& Flux=opdiv->flux_bords();
  const Front_VF& le_bord= ref_cast(Front_VF,frontiere_dis());
  int premiere=le_bord.num_premiere_face();
  double surf=0;
  double fluxb=0;
  for(int i=0; i<le_bord.nb_faces(); i++)
    {
      int face=premiere+i;
      surf+=domaine_VF.face_surfaces(face);
      fluxb+=Flux(face,0);
    }
  // Optimization: combine 2 mp_sum into 1 collective call
  mp_sum_for_each(surf, fluxb);
  double u_moy=fluxb/surf;
 
 
  fonction_.setVar(0,u_moy);
  double Pout=fonction_.eval();
 
 
  Cout << frontiere_dis().le_nom()<<" time "<<  tps <<" u_moy "<< u_moy<<" Pout "<<Pout <<finl;
  int nb_cases=les_valeurs->nb_cases();
 
 
  for (int t=0; t<nb_cases; t++)
    {
      DoubleTab& tab=les_valeurs[t].valeurs();
      tab=Pout;
    }
 
  // exit();
}