Frottement_interfacial_Kumar_Brooks.cpp

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/// Vineet Kumar, Caleb S. Brooks, Inter-group mass transfer modeling in the two-group two-fluid model with interfacial area transport equation in condensing flow, International Journal of Heat and Mass Transfer, 2018, https://doi.org/10.1016/j.ijheatmasstransfer.2017.11.087
 
 
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#include <Frottement_interfacial_Kumar_Brooks.h>
#include <Pb_Multiphase.h>
#include <Milieu_composite.h>
#include <Sources_helpers_Multiphase.h>
#include <math.h>
 
Implemente_instanciable(Frottement_interfacial_Kumar_Brooks, "Frottement_interfacial_Kumar_Brooks", Frottement_interfacial_base);
 
Sortie& Frottement_interfacial_Kumar_Brooks::printOn(Sortie& os) const
{
  return os;
}
 
Entree& Frottement_interfacial_Kumar_Brooks::readOn(Entree& is)
{
  Param param(que_suis_je());
  param.ajouter("Dh", &Dh_);
  param.ajouter("constante_gravitation", &g_);
  param.lire_avec_accolades_depuis(is);
 
  n_l = find_liquid_phase();
 
  return is;
}
 
void Frottement_interfacial_Kumar_Brooks::coefficient(const DoubleTab& alpha, const DoubleTab& p, const DoubleTab& T,
                                                      const DoubleTab& rho, const DoubleTab& mu, const DoubleTab& sigma, double Dh,
                                                      const DoubleTab& ndv, const DoubleTab& d_bulles, DoubleTab& coeff) const
{
  int N = ndv.dimension(0);
 
  coeff = 0;
 
  for (int k = 0; k < N; k++)
    if (k!=n_l)
      {
        const int ind_trav = sigma_pair_index(k, n_l, N);
 
        const double Eo = eotvos_number(g_, rho(n_l), rho(k), d_bulles(k), sigma(ind_trav));
        double Cd = (std::sqrt(Eo)<4.)? 2./3.* std::sqrt(Eo) / std::sqrt(1.-alpha(k)) : 4./3. / 0.35 / 0.35 * std::sqrt(g_ * std::abs(rho(n_l)-rho(k))/rho(n_l)/Dh_) * d_bulles(k) /(1.-alpha(k));
 
        coeff(k, n_l, 1) = (alpha(n_l) < 1.e-6) ? 3./4.*Cd/d_bulles(k) * alpha(k) * rho(n_l) * alpha(n_l) * 1.e6
                           : 3./4.* Cd / d_bulles(k) * alpha(k) * rho(n_l);
        coeff(k, n_l, 0) = coeff(k, n_l, 1) * ndv(n_l,k);
        coeff(n_l, k, 0) = coeff(k, n_l, 0);
        coeff(n_l, k, 1) = coeff(k, n_l, 1);
 
      }
}
 
 
void Frottement_interfacial_Kumar_Brooks::coefficient_CD(const DoubleTab& alpha, const DoubleTab& p, const DoubleTab& T,
                                                         const DoubleTab& rho, const DoubleTab& mu, const DoubleTab& sigma, double Dh,
                                                         const DoubleTab& ndv, const DoubleTab& d_bulles, DoubleTab& coeff) const
{
  int N = ndv.dimension(0);
 
  coeff = 0;
 
  for (int k = 0; k < N; k++)
    if (k!=n_l)
      {
        const int ind_trav = sigma_pair_index(k, n_l, N);
 
 
        const double Eo = eotvos_number(g_, rho(n_l), rho(k), d_bulles(k), sigma(ind_trav));
        double Cd = (std::sqrt(Eo)<4.)? 2./3.*std::sqrt(Eo) / std::sqrt(1.-alpha(k)) : 4./3. / 0.35 / 0.35 * std::sqrt(g_ * std::abs(rho(n_l)-rho(k))/rho(n_l)/Dh_) * d_bulles(k) / (1.-alpha(k));
 
        coeff(k, n_l) = (coeff(n_l, k) = Cd);
      }
}