Vitesse_derive_Ishii.cpp

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#include <Vitesse_derive_Ishii.h>
#include <cmath>
 
Implemente_instanciable(Vitesse_derive_Ishii, "Vitesse_relative_derive_Ishii", Vitesse_derive_base);
 
Sortie& Vitesse_derive_Ishii::printOn(Sortie& os) const { return Vitesse_derive_base::printOn(os); }
Entree& Vitesse_derive_Ishii::readOn(Entree& is) { return Vitesse_derive_base::readOn(is); }
 
void Vitesse_derive_Ishii::set_param(Param& param) const
{
  param.ajouter("subcooled_boiling", &sb_, Param::REQUIRED);
  Vitesse_derive_base::set_param(param);
}
 
void Vitesse_derive_Ishii::evaluate_C0_vg0(const input_t& input) const
{
  const int D = dimension;
  const double norm_g = sqrt(local_carre_norme_vect(input.g));
 
  int N = input.v.dimension(0);
  int ind_trav = 0 ; // Et oui ! matrice triang sup !
  if (n_g>n_l) ind_trav = (n_l*(N-1)-(n_l-1)*(n_l)/2) + (n_g-n_l-1);
  else         ind_trav = (n_g*(N-1)-(n_g-1)*(n_g)/2) + (n_l-n_g-1);
 
  /* distribution parameter */
  C0 = ( Cinf + (1.0 - Cinf) * std::sqrt(input.rho(n_g) / input.rho(n_l)) ) * (1.0 - sb_ * exp(-zeta * input.alpha(n_g)));
 
  /* drift velocity */
  double dv = std::sqrt(2.0) * pow((input.rho(n_l) - input.rho(n_g)) * norm_g * input.sigma(ind_trav) / input.rho(n_l) / input.rho(n_l), 0.25) * pow(1.0 - input.alpha(n_g), theta);
  for (int d = 0; d < D; d++) vg0(d) = - dv * input.g(d) / norm_g;
}