Frottement_interfacial_Tomiyama_complet.cpp

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// NeptuneCFD like force no publication
 
#include <Frottement_interfacial_Tomiyama_complet.h>
#include <Pb_Multiphase.h>
#include <Milieu_composite.h>
#include <Sources_helpers_Multiphase.h>
#include <math.h>
 
Implemente_instanciable(Frottement_interfacial_Tomiyama_complet, "Frottement_interfacial_Tomiyama_complet", Frottement_interfacial_base);
 
Sortie& Frottement_interfacial_Tomiyama_complet::printOn(Sortie& os) const
{
  return os;
}
 
Entree& Frottement_interfacial_Tomiyama_complet::readOn(Entree& is)
{
  Param param(que_suis_je());
  param.ajouter("beta", &beta_);
  param.ajouter("constante_gravitation", &g_);
  param.ajouter("contamination", &contamination_);
  param.lire_avec_accolades_depuis(is);
  if (! ((contamination_==0)|(contamination_==1)|(contamination_==2) )) Process::exit("Frottement_interfacial_Tomiyama_complet : only 3 contamination levels exist : 0,1,2 !");
 
  const Pb_Multiphase *pbm = sub_type(Pb_Multiphase, pb_.valeur()) ? &ref_cast(Pb_Multiphase, pb_.valeur()) : nullptr;
 
  if (!pbm) Process::exit(que_suis_je() + " : not needed for single-phase flow!");
  n_l = find_liquid_phase();
 
  for (int k = 0; k < pbm->nb_phases(); k++)
    if (k != n_l)
      if (!(ref_cast(Milieu_composite, pbm->milieu()).has_interface(n_l, k))) Process::exit("Frottement_interfacial_Tomiyama_complet : one must define an interface and have a surface tension !");
 
  return is;
}
 
void Frottement_interfacial_Tomiyama_complet::completer()
{
  if (!pb_->has_champ("diametre_bulles")) Process::exit("Frottement_interfacial_Tomiyama_complet : there must be a bubble diameter field !");
}
 
std::pair<double, double> Frottement_interfacial_Tomiyama_complet::compute_Cd(double Re, double dndv_Re, double Eo, double alpha_k) const
{
  // Stokes and cap coefficients per contamination level:
  //   contamination_ 0 (pure):       Stokes coeff = 16, cap coeff = 48
  //   contamination_ 1 (moderate):   Stokes coeff = 24, cap coeff = 72
  //   contamination_ 2 (fully cont): Stokes coeff = 24, no cap limit
  static constexpr double stokes_coeff[] = {16., 24., 24.};
  static constexpr double cap_coeff[]    = {48., 72., 1e300};
 
  const double minCdelli_cap = std::min(
                                 2. / 3. * std::sqrt(Eo) * std::pow((1 + 17.67 * std::pow(1 - alpha_k, 9. / 7.)) / (18.67 * std::pow(1 - alpha_k, 3. / 2.)), 2.),
                                 8. * Eo / (3. * (Eo + 4.)) * (1 - alpha_k) * (1 - alpha_k));
 
  const double sc = stokes_coeff[contamination_];
  const double cc = cap_coeff[contamination_];
  const double Re_power = std::pow(Re, 0.687);
  const double Cd_stokes = sc / Re * (1 + 0.15 * Re_power);
  const double Cd_cap    = cc / Re;
  const double Cd_viscous = std::min(Cd_stokes, Cd_cap);
  const double Cd = beta_ * std::max(Cd_viscous, minCdelli_cap);
 
  double dndv_Cd = 0.;
  if (Cd_viscous > minCdelli_cap)
    {
      if (Cd_stokes <= Cd_cap)
        dndv_Cd = beta_ * (-sc * dndv_Re / (Re * Re) * (1 + 0.15 * Re_power) + sc / Re * 0.15 * dndv_Re * 0.687 * std::pow(Re, 0.687 - 1.));
      else
        dndv_Cd = beta_ * (-cc * dndv_Re / (Re * Re));
    }
 
  return {Cd, dndv_Cd};
}
 
void Frottement_interfacial_Tomiyama_complet::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
{
  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 Re      = rho(n_l) * std::max(ndv(n_l, k), 1.e-6)    * d_bulles(k) / mu(n_l);
        const double dndv_Re = rho(n_l) * (ndv(n_l, k) > 1.e-6 ? 1. : 0.) * d_bulles(k) / mu(n_l);
        const double Eo = eotvos_number(g_, rho(n_l), rho(k), d_bulles(k), sigma(ind_trav));
 
        const auto [Cd, dndv_Cd] = compute_Cd(Re, dndv_Re, Eo, alpha(k));
 
        if (alpha(n_l) > 1.e-6)
          {
            coeff(k, n_l, 0) = 3. / 4. * Cd / d_bulles(k) * alpha(k) * rho(n_l) * ndv(n_l, k);
            coeff(n_l, k, 0) = coeff(k, n_l, 0);
            coeff(k, n_l, 1) = 3. / 4. * Cd / d_bulles(k) * alpha(k) * rho(n_l) + 3. / 4. * dndv_Cd / d_bulles(k) * alpha(k) * rho(n_l) * ndv(n_l, k);
            coeff(n_l, k, 1) = coeff(k, n_l, 1);
          }
        else
          {
            coeff(k, n_l, 0) = 3. / 4. * Cd / d_bulles(k) * alpha(k) * rho(n_l) * ndv(n_l, k) * alpha(n_l) * 1.e6;
            coeff(n_l, k, 0) = coeff(k, n_l, 0);
            coeff(k, n_l, 1) = (3. / 4. * Cd / d_bulles(k) * alpha(k) * rho(n_l) + 3. / 4. * dndv_Cd / d_bulles(k) * alpha(k) * rho(n_l) * ndv(n_l, k)) * alpha(n_l) * 1.e6;
            coeff(n_l, k, 1) = coeff(k, n_l, 1);
          }
      }
}
 
 
void Frottement_interfacial_Tomiyama_complet::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
{
  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 Re = rho(n_l) * std::max(ndv(n_l, k), 1.e-6) * d_bulles(k) / mu(n_l);
        const double Eo = eotvos_number(g_, rho(n_l), rho(k), d_bulles(k), sigma(ind_trav));
 
        const auto [Cd, dndv_Cd] = compute_Cd(Re, 0., Eo, alpha(k));
 
        coeff(k, n_l) = (coeff(n_l, k) = Cd);
      }
}