Frottement_interfacial_bulles_composant.cpp

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#include <Frottement_interfacial_bulles_composant.h>
#include <Pb_Multiphase.h>
#include <TRUSTTab.h>
 
Implemente_instanciable(Frottement_interfacial_bulles_composant, "Frottement_interfacial_bulles_composant|Frottement_interfacial_bulles", Frottement_interfacial_base);
 
Sortie& Frottement_interfacial_bulles_composant::printOn(Sortie& os) const
{
  return os;
}
 
Entree& Frottement_interfacial_bulles_composant::readOn(Entree& is)
{
  Param param(que_suis_je());
  param.ajouter("coeff_derive", &C_d_, Param::REQUIRED);
  param.ajouter("rayon_bulle", &r_bulle_, Param::REQUIRED);
  param.lire_avec_accolades_depuis(is);
 
  const Pb_Multiphase *pbm = sub_type(Pb_Multiphase, pb_.valeur()) ? &ref_cast(Pb_Multiphase, pb_.valeur()) : nullptr;
 
  if (!pbm || pbm->nb_phases() == 1) Process::exit(que_suis_je() + " : not needed for single-phase flow!");
 
  return is;
}
 
void Frottement_interfacial_bulles_composant::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
{
  int k,l,N = ndv.dimension(0);
 
  coeff = 0.;
 
// case r_bulle < 0 <=> sedimentation test case, robust
  double rho_m = 0;
  for (k = 0; k < N; k++) rho_m += alpha(k) * rho(k);
  for (k = 0; k < N; k++)
    for (l = 0; l < N; l++)
      if (l != k)
        if (r_bulle_>0) coeff(k, l, 0) = (coeff(k, l, 1) = 1. / 8 * C_d_ * 3 * alpha(k) * alpha(l) / r_bulle_ * rho_m) * ndv(k, l);
}