Density_Euler.cpp

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#include <EcritureLectureSpecial.h>
#include <Momentum_Euler.h>
#include <Density_Euler.h>
#include <Discret_Thyd.h>
#include <Domaine_VF.h>
#include <Pb_Euler.h>
#include <Domaine.h>
#include <Param.h>
 
Implemente_instanciable(Density_Euler, "Masse_Euler|Density_Euler", Conservation_Euler_base);
// XD masse_euler cons_euler density_euler INHERITS_BRACE Mass consevation equation for a multi-phase Euler problem
// XD_CONT where the unknown is the alpha (void fraction)
 
Sortie& Density_Euler::printOn(Sortie& is) const { return Equation_base::printOn(is); }
 
Entree& Density_Euler::readOn(Entree& is)
{
  assert(densite_);
  Conservation_Euler_base::readOn(is);
 
  terme_convectif.set_fichier("Debit");
  terme_convectif.set_description("Mass flow rate=Integral(-rho*u*ndS) [kg/s] if SI units used");
 
  return is;
}
 
void Density_Euler::set_param(Param& param) const
{
  Equation_base::set_param(param);
  param.ajouter_non_std("convection", (this), Param::REQUIRED);
}
 
void Density_Euler::discretiser()
{
  Cerr << "Density_Euler discretization" << finl;
  const Discret_Thyd& dis = ref_cast(Discret_Thyd, discretisation());
  const Pb_Euler& pb = ref_cast(Pb_Euler, probleme());
 
  const double temps = schema_temps().temps_courant();
  const int nb_valeurs_temp = schema_temps().nb_valeurs_temporelles();
  const int N = pb.nb_phases();
 
  dis.discretiser_champ("temperature", domaine_dis(), "alpha_rho", "kg/m3", N, nb_valeurs_temp, temps, l_inco_ch_);
  l_inco_ch_->fixer_nature_du_champ(N == 1 ? scalaire : multi_scalaire);
 
  for (int i = 0; i < N; i++)
    l_inco_ch_->fixer_nom_compo(i, Nom("alpha_rho_") + pb.nom_phase(i));
 
  champs_compris_.ajoute_champ(l_inco_ch_);
 
  dis.discretiser_champ("temperature", domaine_dis(), "densite", "kg/m3", N, nb_valeurs_temp, temps, densite_);
  densite_->fixer_nature_du_champ(N == 1 ? scalaire : multi_scalaire);
 
  for (int i = 0; i < N; i++)
    densite_->fixer_nom_compo(i, Nom("densite_") + pb.nom_phase(i));
 
  champs_compris_.ajoute_champ(densite_);
 
  Equation_base::discretiser();
  Cerr << "Density_Euler discretization ==> ok" << finl;
}
 
// overridden to affect rho, not the unknown !!
Entree& Density_Euler::lire_cond_init(Entree& is)
{
  Cerr << "Reading of initial conditions\n";
  Nom nom;
  Motcle motlu;
  is >> nom;
  motlu = nom;
  if (motlu != Motcle("{"))
    {
      Cerr << "We expected a { while reading " << que_suis_je() << finl;
      Cerr << "and not : " << nom << finl;
      exit();
    }
  is >> nom;
  motlu = nom;
  if (motlu != Motcle(densite().le_nom()))
    {
      Cerr << que_suis_je() << " : expected " << densite().le_nom() << " instead of " << nom << finl;
      exit();
    }
  OWN_PTR(Champ_Don_base) ch_init;
  is >> ch_init;
  const int nb_comp = ch_init->nb_comp();
  verifie_ch_init_nb_comp(densite(), nb_comp);
 
  densite().affecter(ch_init.valeur());
  is >> nom;
  motlu = nom;
  if (motlu != Motcle("}"))
    {
      Cerr << "We expected a } while reading " << que_suis_je() << finl;
      Cerr << "and not : " << nom << finl;
      exit();
    }
  return is;
}
 
void Density_Euler::init_alpha_rho()
{
  const DoubleTab& alpha = ref_cast(Pb_Euler,probleme()).equation_fraction().inconnue().valeurs();
  const DoubleTab& rho = densite().valeurs();
  DoubleTab& alpha_rho = inconnue().valeurs();
  alpha_rho = rho;
  tab_multiply_any_shape(alpha_rho, alpha);
}
 
void Density_Euler::mettre_a_jour_champs_conserves(double temps, int reset)
{
  Equation_base::mettre_a_jour_champs_conserves(temps);
  const DoubleTab& alpha = ref_cast(Pb_Euler,probleme()).equation_fraction().inconnue().valeurs();
  const DoubleTab& alpha_rho = inconnue().valeurs();
  DoubleTab& rho = densite().valeurs();
  rho = alpha_rho;
  tab_divide_any_shape(rho, alpha);
}
 
const Operateur& Density_Euler::operateur(int i) const
{
  if (i)
    {
      Cerr << que_suis_je() << " : wrong operator number " << i << finl;
      Process::exit();
    }
  return terme_convectif;
}
 
Operateur& Density_Euler::operateur(int i)
{
  if (i)
    {
      Cerr << que_suis_je() << " : wrong operator number " << i << finl;
      Process::exit();
    }
  return terme_convectif;
}