Modele_turbulence_hyd_Longueur_Melange_VDF.cpp

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#include <Modele_turbulence_hyd_Longueur_Melange_VDF.h>
 
#include <Domaine_Cl_VDF.h>
#include <Champ_Face_VDF.h>
#include <Equation_base.h>
#include <Probleme_base.h>
#include <Domaine_VDF.h>
#include <TRUSTTrav.h>
#include <Debog.h>
#include <Param.h>
 
Implemente_instanciable(Modele_turbulence_hyd_Longueur_Melange_VDF, "Modele_turbulence_hyd_Longueur_Melange_VDF", Modele_turbulence_hyd_Longueur_Melange_base);
 
Sortie& Modele_turbulence_hyd_Longueur_Melange_VDF::printOn(Sortie& s) const
{
  return s << que_suis_je() << " " << le_nom();
}
 
Entree& Modele_turbulence_hyd_Longueur_Melange_VDF::readOn(Entree& s)
{
  return Modele_turbulence_hyd_Longueur_Melange_base::readOn(s);
}
 
void Modele_turbulence_hyd_Longueur_Melange_VDF::set_param(Param& param) const
{
  Modele_turbulence_hyd_Longueur_Melange_base::set_param(param);
  param.ajouter("canal_hmin", &alt_min_);
  param.ajouter("canal_hmax", &alt_max_);
  param.ajouter("direction_normale_canal", &direction_);
}
 
int Modele_turbulence_hyd_Longueur_Melange_VDF::preparer_calcul()
{
  Modele_turbulence_hyd_base::preparer_calcul();
  mettre_a_jour(0.);
  return 1;
}
 
Champ_Fonc_base& Modele_turbulence_hyd_Longueur_Melange_VDF::calculer_viscosite_turbulente()
{
  double hauteur = std::fabs(alt_max_ - alt_min_); // test alt_max>alt_min should be done instead of taking fabs
  //Note: "hauteur" here is the actual channel height (not the half-height)
  const double Kappa = 0.415;
  double Cmu = CMU;
 
  double temps = mon_equation_->inconnue().temps();
  const Domaine_VDF& domaine_VDF = ref_cast(Domaine_VDF, le_dom_VF_.valeur());
  DoubleTab& visco_turb = la_viscosite_turbulente_->valeurs();
  DoubleVect& k = energie_cinetique_turb_->valeurs();
  const int nb_elem = domaine_VDF.nb_elem();
  const int nb_elem_tot = domaine_VDF.nb_elem_tot();
  const DoubleTab& xp = domaine_VDF.xp();
 
  Sij2_.resize(nb_elem_tot);
 
  calculer_Sij2();
 
  if (visco_turb.size() != nb_elem)
    {
      Cerr << "Size error for the array containing the values of the turbulent viscosity." << finl;
      exit();
    }
 
  Debog::verifier("Modele_turbulence_hyd_Longueur_Melange_VDF::calculer_viscosite_turbulente visco_turb 0", visco_turb);
 
  if (k.size() != nb_elem)
    {
      Cerr << "Size error for the array containing the values of the turbulent kinetic energy." << finl;
      exit();
    }
 
  //    PLANE CHANNEL along (Ox - h=2) **********************************
 
  for (int elem = 0; elem < nb_elem; elem++)
    {
      double y = xp(elem, direction_);
      y = std::fabs(y - alt_min_);
      if (y > (hauteur / 2.))
        y = std::fabs(alt_max_ - y);
 
      visco_turb(elem) = Kappa * Kappa * y * y * (1. - 2 * y / hauteur) * sqrt(2. * Sij2_(elem));
      k(elem) = pow(visco_turb(elem) / (Cmu * y), 2);
    }
 
  Debog::verifier("Modele_turbulence_hyd_Longueur_Melange_VDF::calculer_viscosite_turbulente visco_turb 1", visco_turb);
 
  la_viscosite_turbulente_->changer_temps(temps);
  return la_viscosite_turbulente_;
}
 
void Modele_turbulence_hyd_Longueur_Melange_VDF::calculer_Sij2()
{
  const DoubleTab& vitesse = mon_equation_->inconnue().valeurs();
  Champ_Face_VDF& ch = ref_cast(Champ_Face_VDF, mon_equation_->inconnue());
  const Domaine_Cl_VDF& domaine_Cl_VDF = ref_cast(Domaine_Cl_VDF, le_dom_Cl_.valeur());
  const Domaine_VDF& domaine_VDF = ref_cast(Domaine_VDF, le_dom_VF_.valeur());
  const int nb_elem = domaine_VDF.nb_elem_tot();
 
  assert(vitesse.line_size() == 1);
  DoubleTab duidxj(nb_elem, dimension, dimension, vitesse.line_size());
  int i, j;
  double Sij;
 
  Sij2_ = 0.;
 
  ch.calcul_duidxj(vitesse, duidxj, domaine_Cl_VDF);
 
  for (int elem = 0; elem < nb_elem; elem++)
    {
      for (i = 0; i < dimension; i++)
        for (j = 0; j < dimension; j++)
          {
            //Shifted computation of Sij
            Sij = 0.5 * (duidxj(elem, i, j, 0) + duidxj(elem, j, i, 0));
            Sij2_(elem) += Sij * Sij;
          }
    }
}