Paroi_scal_analytique_VEF.cpp

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#include <Paroi_scal_analytique_VEF.h>
#include <Paroi_std_scal_hyd_VEF.h>
#include <Paroi_std_hyd_VEF.h>
#include <Probleme_base.h>
#include <Champ_Uniforme.h>
#include <Dirichlet_paroi_fixe.h>
#include <Dirichlet_paroi_defilante.h>
#include <Fluide_base.h>
#include <Modele_turbulence_hyd_base.h>
#include <Convection_Diffusion_Concentration.h>
#include <Modele_turbulence_scal_base.h>
#include <Constituant.h>
 
Implemente_instanciable(Paroi_scal_analytique_VEF,"loi_analytique_scalaire_VEF",Paroi_scal_hyd_base_VEF);
 
// printOn()
Sortie& Paroi_scal_analytique_VEF::printOn(Sortie& s) const
{
  return s << que_suis_je() << " " << le_nom();
}
 
// readOn
Entree& Paroi_scal_analytique_VEF::readOn(Entree& s)
{
  return Paroi_scal_hyd_base_VEF::readOn(s);
}
 
int Paroi_scal_analytique_VEF::calculer_scal(Champ_Fonc_base& diffusivite_turb)
{
  const Domaine_VEF& domaine_VEF = ref_cast(Domaine_VEF, le_dom_dis_.valeur());
 
  const IntTab& face_voisins = domaine_VEF.face_voisins();
  DoubleTab& alpha_t = diffusivite_turb.valeurs();
  Equation_base& eqn_hydr = mon_modele_turb_scal->equation().probleme().equation(0);
  const Fluide_base& le_fluide = ref_cast(Fluide_base,eqn_hydr.milieu());
  const DoubleVect& volumes_maille = domaine_VEF.volumes();
  const DoubleVect& surfaces_face = domaine_VEF.face_surfaces();
 
  int elem;
  double dist=-1;
  const RefObjU& modele_turbulence_hydr = eqn_hydr.get_modele(TURBULENCE);
  const Modele_turbulence_hyd_base& le_modele = ref_cast(Modele_turbulence_hyd_base,modele_turbulence_hydr.valeur());
  const Turbulence_paroi_base& loi = le_modele.loi_paroi();
  const DoubleVect& tab_u_star = loi.tab_u_star();
  const Equation_base& eqn = mon_modele_turb_scal->equation();
 
  int schmidt = 0;
  if (sub_type(Convection_Diffusion_Concentration,eqn)) schmidt = 1;
  const Champ_Don_base& alpha = (schmidt==1?ref_cast(Convection_Diffusion_Concentration,eqn).constituant().diffusivite_constituant():le_fluide.diffusivite());
  // Boucle sur les bords:
  for (int n_bord=0; n_bord<domaine_VEF.nb_front_Cl(); n_bord++)
    {
      // pour chaque condition limite on regarde son type
      // On applique les lois de paroi uniquement
      // aux voisinages des parois
      const Cond_lim& la_cl = le_dom_Cl_dis_->les_conditions_limites(n_bord);
      if ( (sub_type(Dirichlet_paroi_fixe,la_cl.valeur()))
           || (sub_type(Dirichlet_paroi_defilante,la_cl.valeur())) )
        {
          const Front_VF& le_bord = ref_cast(Front_VF,la_cl->frontiere_dis());
          int size=le_bord.nb_faces_tot();
          for (int ind_face=0; ind_face<size; ind_face++)
            {
              int num_face = le_bord.num_face(ind_face);
              // We search the element touching the wall on the face "num_face".
              elem = face_voisins(num_face,0);
              if (elem == -1)
                elem = face_voisins(num_face,1);
 
              // Calcul de la distance normale de la premiere maille
              if (axi)
                {
                  Cerr<<"Attention: the axisymmetric VEF case is not yet implemented"<<finl;
                  Cerr<<"in the thermal wall-function. trust will now stop."<<finl;
                  Process::exit();
                }
              else
                {
                  // distance to the wall of the center of gravity of the element.
                  dist = volumes_maille(elem)/surfaces_face(num_face);
                }
 
              double u_star = tab_u_star(num_face);
              if (u_star == 0)
                {
                  equivalent_distance_[n_bord](ind_face) = dist;
                }
              else
                {
                  double d_alpha=0.;
                  if (sub_type(Champ_Uniforme,alpha))
                    d_alpha = alpha.valeurs()(0,0);
                  else
                    {
                      if (alpha.nb_comp()==1)
                        d_alpha = alpha.valeurs()(elem);
                      else
                        d_alpha = alpha.valeurs()(elem,0);
                    }
 
                  //Expression de d_eq formulee pour le cas nu_t imposee analytiquement
                  //Version qui suppose que nu_t et lambda_t on ete modifies pour les mailles pres de la paroi
 
                  double rap = alpha_t(elem)/d_alpha;
                  equivalent_distance_[n_bord](ind_face) = dist*(1.+((1.+rap)*log(1.+rap)-rap)/(rap+1.e-10));
                  /*
                  //Version qui consiste a ne pas modifier nu_t et lambda_t pres de la paroi
                  //rap *= 4./3.
                  //equivalent_distance_[n_bord](ind_face) = dist*(1.+((1.+rap)*log(1.+rap)-rap)/(rap+1.e-10));
                  //equivalent_distance_[n_bord](ind_face) *= (1.+(3./4.)*rap)/(1.+rap);
                  */
 
                }
 
            }
        }
    }
  return 1;
}