Flux_interfacial_Kim_Park.cpp

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#include <Flux_interfacial_Kim_Park.h>
#include <Pb_Multiphase.h>
 
Implemente_instanciable(Flux_interfacial_Kim_Park, "Flux_interfacial_Kim_Park", Flux_interfacial_base);
 
Sortie& Flux_interfacial_Kim_Park::printOn(Sortie& os) const
{
  return os;
}
 
Entree& Flux_interfacial_Kim_Park::readOn(Entree& is)
{
  return is;
}
 
void Flux_interfacial_Kim_Park::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++) //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;
 
  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_Kim_Park::coeffs(const input_t& in, output_t& out) const
{
  int k, N = out.hi.dimension(0);
  for (k = 0; k < N; k++)
    if (k != n_l)
      {
        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);
        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 Ja = in.rho[n_l] * in.Cp[n_l] * (in.T[k] -  in.T[n_l]) / (in.rho[k] * in.Lvap[ind_trav] );
        double Nu = 0.2575 * std::pow(Re_b, .7)*std::pow(Pr, -.4564)*std::pow(Ja, -.2043);
        out.hi(n_l, k) = Nu * in.lambda[n_l] / in.d_bulles[k] * 6 * std::max(in.alpha[k], 1e-4) / in.d_bulles[k] ; // std::max() to ensure non-zero interfacial flux
        out.da_hi(n_l, k, k) = in.alpha[k] > 1e-4 ? Nu * in.lambda[n_l] * 6. / (in.d_bulles[k]*in.d_bulles[k]) : 0;
        out.hi(k, n_l) = 1e8;
      }
}