Viscosite_turbulente_Smagorinsky.cpp

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#include <Viscosite_turbulente_Smagorinsky.h>
#include <Pb_Multiphase.h>
#include <Domaine_VF.h>
#include <Param.h>
 
Implemente_instanciable(Viscosite_turbulente_Smagorinsky, "Viscosite_turbulente_Smago", Viscosite_turbulente_LES_base);
// XD type_diffusion_turbulente_multiphase_smago type_diffusion_turbulente_multiphase_deriv smago BRACE LES Smagorinsky
// XD_CONT type.
 
Sortie& Viscosite_turbulente_Smagorinsky::printOn(Sortie& os) const { return os; }
 
Entree& Viscosite_turbulente_Smagorinsky::readOn(Entree& is)
{
  mod_const_ = 0.18; // par default
  Param param(que_suis_je());
  param.ajouter("cs", &mod_const_); // XD_ADD_P floattant
  // XD_CONT Smagorinsky's model constant. By default it is se to 0.18.
  param.lire_avec_accolades_depuis(is);
 
  if (mod_const_ < 0.) Process::exit("The smagorinsky's constant must be positive !");
  else Cerr << "LES Smagorinsky model used with constant Cs = " << mod_const_ << finl;
 
  pb_->creer_champ("taux_cisaillement"); // On en aura besoin pour le calcul de la viscosite turbulente
 
  return Viscosite_turbulente_LES_base::readOn(is);
}
 
void Viscosite_turbulente_Smagorinsky::eddy_viscosity(DoubleTab& nu_t) const
{
  const DoubleTab& tc = pb_->get_champ("taux_cisaillement").valeurs();
  assert(nu_t.dimension(0) == tc.dimension(0) && tc.dimension(1) <= nu_t.dimension(1));
  //on met 0 pour les composantes au-dela de k.dimension(1) (ex. : vapeur dans Pb_Multiphase)
  for (int i = 0; i < nu_t.dimension(0); i++)
    for (int n = 0; n < nu_t.dimension(1); n++)
      nu_t(i, n) = n < tc.dimension(1) ? mod_const_ * mod_const_ * l_(i) * l_(i) * tc(i, n) : 0; // XXX attention l_ resize comme nb_elem pas tot ...
 
  nu_t.echange_espace_virtuel();
}