Multiplicateur_diphasique_homogene.cpp

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#include <Multiplicateur_diphasique_homogene.h>
#include <Pb_Multiphase.h>
 
Implemente_instanciable(Multiplicateur_diphasique_homogene, "Multiplicateur_diphasique_homogene", Multiplicateur_diphasique_base);
 
Sortie& Multiplicateur_diphasique_homogene::printOn(Sortie& os) const
{
  return os;
}
 
Entree& Multiplicateur_diphasique_homogene::readOn(Entree& is)
{
  Param param(que_suis_je());
  param.ajouter("alpha_min", &alpha_min_);
  param.ajouter("alpha_max", &alpha_max_);
  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) n_l = 0, n_g = -1; //not a Pb_Multiphase -> single-phase liquid
  else for (int n = 0; n < pbm->nb_phases(); n++) //search for n_l, n_g: continuous {liquid,gas} phase with priority
      if (pbm->nom_phase(n).debute_par("liquide") && (n_l < 0 || pbm->nom_phase(n).finit_par("continu")))  n_l = n;
      else if (pbm->nom_phase(n).debute_par("gaz") && (n_g < 0 || pbm->nom_phase(n).finit_par("continu"))) n_g = n;
 
  if (n_l < 0) Process::exit(que_suis_je() + " : main phase not found!");
 
  return is;
}
 
void Multiplicateur_diphasique_homogene::coefficient(const double *alpha, const double *rho, const double *v, const double *f,
                                                     const double *mu, const double Dh, const double gamma, const double *Fk,
                                                     const double Fm, DoubleTab& coeff) const
{
  double G = alpha[n_l] * rho[n_l] * std::fabs(v[n_l]) + alpha[n_g] * rho[n_g] * std::fabs(v[n_g]), //total mass flux
         x = G ? alpha[n_g] * rho[n_g] * v[n_g] / G : 0, //quality
         Phi2 = 1 + x * (rho[n_l] / rho[n_g] - 1), //the multiplier!
         frac_g = std::min(std::max((alpha[n_g] - alpha_min_) / (alpha_max_ - alpha_min_), 0.), 1.), frac_l = 1 - frac_g; //fraction applied to the vapor
  coeff = 0;
  coeff(n_l, 0) = frac_l * Phi2;
  coeff(n_g, 0) = frac_g ? frac_g / (alpha[n_g] * alpha[n_g]) : 0; //switch to "vapor-only" friction
}