Flux_interfacial_Ranz_Marshall.cpp

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#include <Flux_interfacial_Ranz_Marshall.h>
#include <Pb_Multiphase.h>
 
Implemente_instanciable(Flux_interfacial_Ranz_Marshall, "Flux_interfacial_Ranz_Marshall", Flux_interfacial_base);
 
Sortie& Flux_interfacial_Ranz_Marshall::printOn(Sortie& os) const { return Flux_interfacial_base::printOn(os); }
Entree& Flux_interfacial_Ranz_Marshall::readOn(Entree& is)
{
  Param param(que_suis_je());
  param.ajouter("dv_min", &dv_min_);
  param.lire_avec_accolades_depuis(is);
  return is;
}
 
void Flux_interfacial_Ranz_Marshall::completer()
{
  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!");
  for (int n = 0; n < pbm->nb_phases(); n++) //recherche de n_l, n_g : phase {liquide,gaz}_continu en priorite
    if (pbm->nom_phase(n).debute_par("liquide") && (n_l < 0 || pbm->nom_phase(n).finit_par("continu")))  n_l = n;
 
  if (n_l < 0) Process::exit(que_suis_je() + " : liquid phase not found!");
 
  if (!pbm->has_champ("diametre_bulles")) Process::exit("Flux_interfacial_Ranz_Mashall : bubble diameter needed !");
}
 
void Flux_interfacial_Ranz_Marshall::coeffs(const input_t& in, output_t& out) const
{
  out.hi = 0.0, out.da_hi = 0.0;
  int k, N = out.hi.dimension(0);
  for (k = 0; k < N; k++)
    if (k != n_l)
      {
        double Re_b = in.rho[n_l] * in.nv[N * n_l + k] * in.d_bulles[k] / in.mu[n_l];
        double Pr = in.mu[n_l] * in.Cp[n_l] / in.lambda[n_l];
        double Nu = 2.0 + 0.6* std::pow(Re_b, 0.5)*std::pow(Pr, 0.3);
        out.hi(n_l, k) = Nu * in.lambda[n_l] / in.d_bulles[k] * 6.0 * std::max(in.alpha[k], a_min) / in.d_bulles[k]; // std::max() pour que le flux interfacial sont non nul
        out.da_hi(n_l, k, k) = in.alpha[k] > a_min ? Nu * in.lambda[n_l] * 6.0 / (in.d_bulles[k] * in.d_bulles[k]) : 0;
        out.hi(k, n_l) = 1e8;
      }
}