Frottement_interfacial_Ishii_Zuber_Deformable.cpp

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#include <Frottement_interfacial_Ishii_Zuber_Deformable.h>
#include <Pb_Multiphase.h>
#include <Milieu_composite.h>
#include <math.h>
 
Implemente_instanciable(Frottement_interfacial_Ishii_Zuber_Deformable, "Frottement_interfacial_Ishii_Zuber_Deformable", Frottement_interfacial_base);
 
Sortie& Frottement_interfacial_Ishii_Zuber_Deformable::printOn(Sortie& os) const
{
  return os;
}
 
Entree& Frottement_interfacial_Ishii_Zuber_Deformable::readOn(Entree& is)
{
  Param param(que_suis_je());
  param.ajouter("beta", &beta_);
  param.ajouter("constante_gravitation", &g_);
  param.lire_avec_accolades_depuis(is);
 
  n_l = find_liquid_phase();
 
  const Pb_Multiphase& pbm = ref_cast(Pb_Multiphase, pb_.valeur());
  for (int k = 0; k < pbm.nb_phases(); k++)
    if (k != n_l)
      if (!(ref_cast(Milieu_composite, pbm.milieu()).has_interface(n_l, k)))
        Process::exit(que_suis_je() + " : one must define an interface and have a surface tension !");
 
  return is;
}
 
void Frottement_interfacial_Ishii_Zuber_Deformable::coefficient(const DoubleTab& alpha, const DoubleTab& p, const DoubleTab& T,
                                                                const DoubleTab& rho, const DoubleTab& mu, const DoubleTab& sigma, double Dh,
                                                                const DoubleTab& ndv, const DoubleTab& d_bulles, DoubleTab& coeff) const
{
  const int N = ndv.dimension(0);
 
  coeff = 0;
 
  for (int k = 0; k < N; k++)
    if (k != n_l)
      {
        const int ind_trav = (k > n_l)
                             ? (n_l*(N-1)-(n_l-1)*(n_l)/2) + (k-n_l-1)
                             : (k*(N-1)-(k-1)*(k)/2) + (n_l-k-1);
 
        const double capillary = std::sqrt((rho[n_l] - rho[k])*9.81/sigma[ind_trav]);
        const double bubbly =  alpha[k]*rho[n_l]*0.5*capillary*std::pow(std::max(1-alpha[k], 1.e-3), -.5);
 
        coeff(k, n_l, 1) = bubbly ;
        coeff(k, n_l, 0) = bubbly * ndv(n_l,k);
        coeff(n_l, k, 0) = coeff(k, n_l, 0);
        coeff(n_l, k, 1) = coeff(k, n_l, 1);
      }
}
 
void Frottement_interfacial_Ishii_Zuber_Deformable::coefficient_CD(const DoubleTab& alpha, const DoubleTab& p, const DoubleTab& T,
                                                                   const DoubleTab& rho, const DoubleTab& mu, const DoubleTab& sigma, double Dh,
                                                                   const DoubleTab& ndv, const DoubleTab& d_bulles, DoubleTab& coeff) const
{
  const int N = ndv.dimension(0);
 
  coeff = 0;
 
  for (int k = 0; k < N; k++)
    if (k != n_l)
      {
        const int ind_trav = (k > n_l)
                             ? (n_l*(N-1)-(n_l-1)*(n_l)/2) + (k-n_l-1)
                             : (k*(N-1)-(k-1)*(k)/2) + (n_l-k-1);
 
        const double capillary = std::sqrt((rho[n_l]-rho[k])*9.81/sigma[ind_trav]);
        const double bubbly =  alpha[k]*rho[n_l]*0.5*capillary*std::pow(1-alpha[k], -.5);
 
        const double Cd = bubbly / (3./4./d_bulles(k) * alpha(k) * rho(n_l));
 
        coeff(k, n_l) = (coeff(n_l, k) = Cd);
      }
}