Flux_interfacial_Zeitoun.cpp

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#include <Flux_interfacial_Zeitoun.h>
#include <Pb_Multiphase.h>
 
Implemente_instanciable(Flux_interfacial_Zeitoun, "Flux_interfacial_Zeitoun", Flux_interfacial_base);
 
Sortie& Flux_interfacial_Zeitoun::printOn(Sortie& os) const
{
  return os;
}
 
Entree& Flux_interfacial_Zeitoun::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_Zeitoun::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 !");
 
  if (a_res_ < 1.e-12)
    {
      a_res_ = ref_cast(QDM_Multiphase, pb_->equation(0)).alpha_res();
      a_res_ = std::max(1.e-4, a_res_*10.);
    }
 
  a_res_ = -1.;
}
 
 
void Flux_interfacial_Zeitoun::coeffs(const input_t& in, output_t& out) const
{
  out.hi = 0.;
  out.da_hi= 0.;
  out.dp_hi = 0.;
  out.dT_hi= 0.;
 
  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);
        if ( in.T[k] >  in.T[n_l]) // Cas condensation
          {
            double Re_b   = in.rho[n_l] * in.nv[N * n_l + k] * in.d_bulles[k] / in.mu[n_l];
 
            double Ja     = std::max(in.T[k] -  in.T[n_l], 2.) * in.rho[n_l] * in.Cp[n_l] / (in.rho[k] *             in.Lvap[ind_trav] );
            double dP_Ja  = std::max(in.T[k] -  in.T[n_l], 2.) * in.rho[n_l] * in.Cp[n_l] /  in.rho[k] * -in.dP_Lvap[ind_trav]/(in.Lvap[ind_trav]*in.Lvap[ind_trav]) ;
            double dTk_Ja = (in.T[k] -  in.T[n_l] > 2.) ?        in.rho[n_l] * in.Cp[n_l] / (in.rho[k] *             in.Lvap[ind_trav] ) : 0. ;
            double dTl_Ja = (in.T[k] -  in.T[n_l] > 2.) ?      - in.rho[n_l] * in.Cp[n_l] / (in.rho[k] *             in.Lvap[ind_trav] ) : 0. ;
 
            double Nu     = 2.04* std::pow(Re_b, .61)*            std::pow(std::max(in.alpha[k], a_min_coeff), 0.328)*              std::pow(Ja, -0.308);
            double da_Nu  = 2.04* std::pow(Re_b, .61)*( (in.alpha[k] > a_min_coeff) ? 0.328*std::pow(in.alpha[k], 0.328-1.) : 0. )* std::pow(Ja, -1.308);
            double dP_Nu  = 2.04* std::pow(Re_b, .61)*            std::pow(std::max(in.alpha[k], a_min_coeff), 0.328)*              -.308*dP_Ja  *std::pow(Ja, -1.308);
            double dTk_Nu = 2.04* std::pow(Re_b, .61)*            std::pow(std::max(in.alpha[k], a_min_coeff), 0.328)*              -.308*dTk_Ja *std::pow(Ja, -1.308);
            double dTl_Nu = 2.04* std::pow(Re_b, .61)*            std::pow(std::max(in.alpha[k], a_min_coeff), 0.328)*              -.308*dTl_Ja *std::pow(Ja, -1.308);
 
            out.hi(n_l, k)       =  Nu    * in.lambda[n_l] * 6. / (in.d_bulles[k]*in.d_bulles[k]) * std::max(in.alpha[k], a_min); // std::max() to ensure non-zero interfacial flux
            out.da_hi(n_l, k, k) = (in.alpha[k] > a_min ?
                                    Nu    * in.lambda[n_l] * 6. / (in.d_bulles[k]*in.d_bulles[k]) :
                                    0.)
                                   + da_Nu* in.lambda[n_l] * 6. / (in.d_bulles[k]*in.d_bulles[k]) * std::max(in.alpha[k], a_min);
            out.dp_hi(n_l, k)    = dP_Nu  * in.lambda[n_l] * 6. / (in.d_bulles[k]*in.d_bulles[k]) * std::max(in.alpha[k], a_min);
            out.dT_hi(n_l, k,n_l)= dTl_Nu * in.lambda[n_l] * 6. / (in.d_bulles[k]*in.d_bulles[k]) * std::max(in.alpha[k], a_min);
            out.dT_hi(n_l, k, k) = dTk_Nu * in.lambda[n_l] * 6. / (in.d_bulles[k]*in.d_bulles[k]) * std::max(in.alpha[k], a_min);
            out.hi(k, n_l) = 1e8;
            if (in.alpha[k] < a_res_)
              {
                double hi_loc = out.hi(n_l, k);
                out.hi(n_l, k)       = 1.e8*(1-in.alpha[k]/a_res_) +       out.hi(n_l, k) * in.alpha[k]/a_res_;
                out.da_hi(n_l, k, k) =        -1.e8/a_res_         + out.da_hi(n_l, k, k) * in.alpha[k]/a_res_ + hi_loc/a_res_;
                out.dp_hi(n_l, k)    = out.dp_hi(n_l, k) * in.alpha[k]/a_res_ ;
              }
          }
        else  // Cas flashing
          {
            out.hi(n_l, k) = 1.e8;
            out.da_hi(n_l, k, k) = 0.;
            out.dp_hi(n_l, k)    = 0.;
            out.dT_hi(n_l, k,n_l)= 0.;
            out.dT_hi(n_l, k, k) = 0.;
            out.hi(k, n_l) = 1e8;
          }
      }
}