Champ_Ostwald_VEF.cpp

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#include <Navier_Stokes_std.h>
#include <Champ_Ostwald_VEF.h>
#include <Champ_Uniforme.h>
#include <Fluide_Ostwald.h>
#include <Domaine_VEF.h>
 
Implemente_instanciable(Champ_Ostwald_VEF, "Champ_Ostwald_VEF", Champ_Ostwald);
 
Sortie& Champ_Ostwald_VEF::printOn(Sortie& os) const { return os << valeurs()(0, 0); }
 
Entree& Champ_Ostwald_VEF::readOn(Entree& is) { return is; }
 
/*! @brief @brief Update the parameter mu at the given time.
 *
 * @param (double) current time
 */
void Champ_Ostwald_VEF::mettre_a_jour(double tps)
{
  me_calculer(tps);
  changer_temps(tps);
  Champ_Don_base::mettre_a_jour(tps);
}
 
/*! @brief @brief Compute the viscosity mu as a function of the consistency and the structure index using the Ostwald law.
 *
 *  For very low and very high viscosities, a regression is used.
 *
 * @param (DoubleTab&) viscosities at the previous time step
 */
 
void Champ_Ostwald_VEF::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.);
        }
    }
}
 
void Champ_Ostwald_VEF::associer_eqn(const Navier_Stokes_std& eq)
{
  eq_hydraulique = ref_cast(Navier_Stokes_std, eq);
}
 
void Champ_Ostwald_VEF::calculer_dscald(DoubleTab& dscald)
{
  const Domaine_VEF& domaine_VEF = ref_cast(Domaine_VEF,domaine_vf());
  const Domaine_Cl_VEF& zcl_VEF = ref_cast(Domaine_Cl_VEF, eq_hydraulique->domaine_Cl_dis());
  const DoubleTab& vit = eq_hydraulique->inconnue().valeurs();
  int nb_elem = domaine_VEF.nb_elem();
  int nb_elem_tot = domaine_VEF.nb_elem_tot();
 
  int elem;
 
  DoubleTab gradient_elem(nb_elem_tot, dimension, dimension);
  Champ_P1NC::calcul_gradient(vit, gradient_elem, zcl_VEF);
 
  if (dimension == 2)
    for (elem = 0; elem < nb_elem; elem++)
      {
        dscald(elem) = 4. * (gradient_elem(elem, 0, 0) * gradient_elem(elem, 0, 0) + gradient_elem(elem, 1, 1) * gradient_elem(elem, 1, 1))
                       + 2. * ((gradient_elem(elem, 0, 1) + gradient_elem(elem, 1, 0)) * (gradient_elem(elem, 0, 1) + gradient_elem(elem, 1, 0)));
      }
  else if (dimension == 3)
    for (elem = 0; elem < nb_elem; elem++)
      {
        dscald(elem) = 4. * (gradient_elem(elem, 0, 0) * gradient_elem(elem, 0, 0) + gradient_elem(elem, 1, 1) * gradient_elem(elem, 1, 1) + gradient_elem(elem, 2, 2) * gradient_elem(elem, 2, 2))
                       + 2.
                       * (((gradient_elem(elem, 0, 1) + gradient_elem(elem, 1, 0)) * (gradient_elem(elem, 0, 1) + gradient_elem(elem, 1, 0)))
                          + ((gradient_elem(elem, 2, 0) + gradient_elem(elem, 0, 2)) * (gradient_elem(elem, 2, 0) + gradient_elem(elem, 0, 2)))
                          + ((gradient_elem(elem, 2, 1) + gradient_elem(elem, 1, 2)) * (gradient_elem(elem, 2, 1) + gradient_elem(elem, 1, 2))));
      }
}
 
/*! @brief @brief Compute the Ostwald field: compute D::D then compute mu.
 *
 * @param (double) time at which the computation is performed
 */
 
void Champ_Ostwald_VEF::me_calculer(double tps)
{
  if (temps_ != tps)
    {
      calculer_dscald(valeurs());
      calculer_mu(valeurs());
    }
}
 
/*! @brief @brief Initialize the field.
 *
 */
void Champ_Ostwald_VEF::init_mu(DoubleTab& mu_tab)
{
  const DoubleTab& K_tab = mon_fluide_->consistance().valeurs();
  for (int i = 0; i < nb_valeurs_nodales(); i++) mu_tab[i] = K_tab[i];
}
 
int Champ_Ostwald_VEF::initialiser(const double un_temps)
{
  mettre_a_jour(un_temps);
  return 1;
}