Flux_interfacial_Wolfert_composant.cpp

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#include <Flux_interfacial_Wolfert_composant.h>
#include <Pb_Multiphase.h>
 
Implemente_instanciable(Flux_interfacial_Wolfert_composant, "Flux_interfacial_Wolfert_composant", Flux_interfacial_base);
 
Sortie& Flux_interfacial_Wolfert_composant::printOn(Sortie& os) const
{
  return os;
}
 
Entree& Flux_interfacial_Wolfert_composant::readOn(Entree& is)
{
  Param param(que_suis_je());
  param.ajouter("Pr_t", &Pr_t_);
  param.ajouter("dv_min", &dv_min_);
  param.lire_avec_accolades_depuis(is);
 
  return is;
}
 
void Flux_interfacial_Wolfert_composant::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_Wolfert_composant::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 Ja = in.rho[n_l] * in.Cp[n_l] * (in.T[k] -  in.T[n_l]) / (in.rho[k] * in.Lvap[ind_trav] );
        double Pe = in.rho[n_l] * in.Cp[n_l] * in.nv[N * n_l + k] * in.d_bulles[k]  / in.lambda[n_l];
        double U_tau = 0.1987 * in.nv[N * n_l + n_l] * std::pow(in.dh * in.rho[n_l] * in.nv[N * n_l + n_l]/ in.mu[n_l], -1./8.)  ; //Blasius correlation
        double lambda_turb = Pr_t_  * 0.06 * U_tau * in.dh ;
 
        double Nu = 12./M_PI*Ja  + 2/std::sqrt(M_PI)*(1+lambda_turb*in.rho[n_l]*in.Cp[n_l]/in.lambda[n_l])*std::sqrt(Pe);
 
        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;
      }
}