Champ_Ostwald_VDF.cpp

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#include <Champ_Ostwald_VDF.h>
#include <Champ_Uniforme.h>
#include <Fluide_Ostwald.h>
 
Implemente_instanciable(Champ_Ostwald_VDF, "Champ_Ostwald_VDF", Champ_Ostwald);
 
Sortie& Champ_Ostwald_VDF::printOn(Sortie& os) const { return os << valeurs()(0, 0); }
 
Entree& Champ_Ostwald_VDF::readOn(Entree& is) { return is; }
 
void Champ_Ostwald_VDF::mettre_a_jour(double tps)
{
  me_calculer(tps);
  changer_temps(tps);
  Champ_Don_base::mettre_a_jour(tps);
}
 
/*! @brief Computes the viscosity mu as a function of consistency and structural index using the Ostwald law.
 *
 * @brief For very low and very high viscosities, a regression is used.
 *
 * @param mu_tab Viscosity values at the previous time step.
 */
 
void Champ_Ostwald_VDF::calculer_mu(DoubleTab& mu_tab)
{
  const double d_n = mon_fluide_->indice_struct().valeurs()(0, 0);
 
  for (int i = 0; i < nb_valeurs_nodales(); i++)
    {
      if (sub_type(Champ_Uniforme, mon_fluide_->consistance()))
        {
          const double d_k = mon_fluide_->consistance().valeurs()(0, 0);
          if (mu_tab[i] < 1.E-4)
            mu_tab[i] = d_k * pow(0.5 * 1.E-4, (d_n - 1.) / 2.);
          else if (mu_tab[i] > 1.E16)
            mu_tab[i] = d_k * pow(0.5 * 1.E16, (d_n - 1.) / 2.);
          else
            mu_tab[i] = d_k * pow(0.5 * mu_tab[i], (d_n - 1.) / 2.);
        }
      else  // K varies as a function of temperature
        {
          const DoubleTab& K_tab = mon_fluide_->consistance().valeurs();
          if (mu_tab[i] < 1.E-4)
            mu_tab[i] = K_tab[i] * pow(0.5 * 1.E-4, (d_n - 1.) / 2.);
          else if (mu_tab[i] > 1.E16)
            mu_tab[i] = K_tab[i] * pow(0.5 * 1.E16, (d_n - 1.) / 2.);
          else
            mu_tab[i] = K_tab[i] * pow(0.5 * mu_tab[i], (d_n - 1.) / 2.);
        }
    }
}
 
/*! @brief Computes the Ostwald field: computes D::D then computes mu.
 *
 * @param tps Time at which the computation is performed.
 */
 
void Champ_Ostwald_VDF::me_calculer(double tps)
{
  if (temps_ != tps)
    {
      // Cerr<< "Compute Mu Ostwald"<<finl;
      mon_champ_->calculer_dscald_centre_element(valeurs());
      calculer_mu(valeurs());
    }
}
 
/*! @brief Initializes the field.
 *
 * @param un_temps Initial time.
 * @return 1 on success.
 */
int Champ_Ostwald_VDF::initialiser(const double un_temps)
{
  mettre_a_jour(un_temps);
  return 1;
}