Equation_Navier_Cauchy.cpp

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#include <Equation_Navier_Cauchy.h>
#include <Discretisation_base.h>
#include <Schema_Temps_base.h>
#include <Probleme_base.h>
#include <Domaine_dis_base.h>
#include <Process.h>
 
Implemente_instanciable(Equation_Navier_Cauchy,"Equation_Navier_Cauchy",Equation_base);
// XD Equation_Navier_Cauchy eqn_base Equation_Navier_Cauchy INHERITS_BRACE Equation_Navier_Cauchy equation
 
Sortie& Equation_Navier_Cauchy::printOn(Sortie& os) const { return Equation_base::printOn(os); }
 
Entree& Equation_Navier_Cauchy::readOn(Entree& is)
{
  Equation_base::readOn(is);
 
  // terme_diffusif.set_fichier("Contrainte_visqueuse");
  // terme_diffusif.set_description("Friction drag exerted by the fluid=Integral(-mu*(grad(u) +grad(u)^T)*ndS) [N] if SI units used");
  solveur_masse->set_name_of_coefficient_temporel("masse_volumique");
 
  return is;
}
 
void Equation_Navier_Cauchy::set_param(Param& param) const
{
  Equation_base::set_param(param);
  param.ajouter_non_std("diffusion",(this));
}
 
int Equation_Navier_Cauchy::lire_motcle_non_standard(const Motcle& mot, Entree& is)
{
  if (mot=="diffusion")
    {
      Cerr << "Reading and typing of the diffusion operator : " << finl;
      terme_diffusif.associer_diffusivite(diffusivite_pour_transport());
      is >> terme_diffusif;
      terme_diffusif.associer_diffusivite_pour_pas_de_temps(diffusivite_pour_pas_de_temps());
      terme_diffusif.associer_diffusivite(milieu_->mu_lame());
      terme_diffusif.associer_diffusivite_volumique(milieu_->lambda_lame());
      return 1;
    }
  else
    return Equation_base::lire_motcle_non_standard(mot,is);
}
 
const Operateur& Equation_Navier_Cauchy::operateur(int i) const
{
  if (i != 0) Process::exit();
  return terme_diffusif;
}
 
Operateur& Equation_Navier_Cauchy::operateur(int i)
{
  if (i != 0) Process::exit();
  return terme_diffusif;
}
 
void Equation_Navier_Cauchy::associer_milieu_base(const Milieu_base& mil)
{
  if (!sub_type(Milieu_Elasticite, mil))
    {
      Cerr << que_suis_je() << " expects a Milieu_Elasticite but received a " << mil.que_suis_je() << finl;
      Process::exit();
    }
  milieu_ = ref_cast(Milieu_Elasticite, mil);
}
 
void Equation_Navier_Cauchy::discretiser()
{
  const Discretisation_base& dis = discretisation();
  const Domaine_dis_base& dom = domaine_dis();
  const Schema_Temps_base& sch = schema_temps();
 
  const int nb_val_temp = sch.nb_valeurs_temporelles();
  const double temps = sch.temps_courant();
 
  dis.discretiser_champ("vitesse", dom, "deplacement", "m", dimension, nb_val_temp, temps, deplacement_);
  dis.discretiser_champ("champ_elem", dom, "von_mises", "Pa", 1, temps, von_mises_);
  dis.discretiser_champ("champ_elem", dom, "contraintes", "Pa", 3, temps, contraintes_);
  dis.discretiser_champ("champ_elem", dom, "deformations", "", 3, temps, deformations_);
  dis.discretiser_champ("vitesse", dom, "vitesse_noeuds", "m/s", dimension, temps, vitesse_noeuds_);
  deformations_->fixer_nom_compo(0, bidim_axi ? "eps_r" : "eps_xx");
  deformations_->fixer_nom_compo(1, bidim_axi ? "eps_z" : "eps_yy");
  deformations_->fixer_nom_compo(2, bidim_axi ? "eps_theta" : "eps_zz");
  contraintes_->fixer_nom_compo(0, bidim_axi ? "sigma_r" : "sigma_xx");
  contraintes_->fixer_nom_compo(1, bidim_axi ? "sigma_z" : "sigma_yy");
  contraintes_->fixer_nom_compo(2, bidim_axi ? "sigma_theta" : "sigma_zz");
  champs_compris_.ajoute_champ(deplacement_);
  champs_compris_.ajoute_champ(von_mises_);
  champs_compris_.ajoute_champ(contraintes_);
  champs_compris_.ajoute_champ(deformations_);
  champs_compris_.ajoute_champ(vitesse_noeuds_);
  terme_diffusif.associer_eqn(*this);
 
  Equation_base::discretiser();
}
 
const Motcle& Equation_Navier_Cauchy::domaine_application() const
{
  static Motcle domaine = "Mecanique";
  return domaine;
}
 
void Equation_Navier_Cauchy::valider_iteration()
{
  Equation_base::valider_iteration();
  update_velocity();
  const bool update_rho = domaine_dis().domaine().deformable();
  milieu_->update_fields(probleme().schema_temps().temps_courant(), update_rho);
}
 
void Equation_Navier_Cauchy::update_velocity()
{
  const double dt = schema_temps().pas_de_temps();
  const DoubleTab& disp_n = deplacement_->valeurs();
  const DoubleTab& disp_nm1 = deplacement_->passe();
  DoubleTab& vit_n = vitesse_noeuds_->valeurs();
 
  for (int i = 0; i < vit_n.dimension_tot(0); i++)
    for (int j = 0; j < dimension; j++)
      vit_n(i, j) = (disp_n(i, j) - disp_nm1(i, j)) / dt;
}
 
void Equation_Navier_Cauchy::mettre_a_jour(double temps)
{
  Equation_base::mettre_a_jour(temps);
 
  von_mises_->changer_temps(temps);
  contraintes_->changer_temps(temps);
  deformations_->changer_temps(temps);
  vitesse_noeuds_->changer_temps(temps);
  update_velocity();
  ref_cast(Operateur_Diff_base, terme_diffusif.l_op_base()).calculer_von_mises(deplacement_->valeurs(), deformations_->valeurs(), contraintes_->valeurs(), von_mises_->valeurs());
}