Diffu_k.cpp

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#include <Diffu_k.h>
#include <Fluide_Incompressible.h>
 
#include <Mod_echelle_LRM_base.h>
#include <MuLambda_TBLE_base.h>
 
Implemente_instanciable(Diffu_k,"Diffu_k",Diffu_totale_hyd_base);
 
Sortie& Diffu_k::printOn(Sortie& os) const
{
  return os ;
}
 
Entree& Diffu_k::readOn( Entree& is)
{
  return is ;
}
 
//////////////////////////////////////////////////////////////////////////////////////////////////////////
//// Cette methode determine la diffusivite totale a en un point donne du maillage fin de Eq_couch_lim ///
//////////////////////////////////////////////////////////////////////////////////////////////////////////
 
// Si la composante du cisaillement a la paroi est dans le sens de l'ecoulement
 
double Diffu_k::calculer_a_local(int ind)
{
 
  double yw, Uw, vv_bar, l_mu, a;
  int N;
 
  Eq_couch_lim& leq = eq_couch_lim.valeur();
  Mod_echelle_LRM_base& ech= mod_echelle_LRM_base.valeur();
  //Mod_echelle_LRM_base& echv= vv_bar.valeur();
 
  double visco_cin = mu_lambda->getNu(eq_couch_lim_T, ind);
  double visco_turb = 0.;
  double u=0.;
 
  N = leq.get_N();
 
  if(ind==0)
    {
      a = visco_cin;
    }
 
  else
    {
      // Attention si ind=N, depassement de tableau
      if (ind==N)
        {
          yw=leq.get_y(ind);
          Uw=leq.get_Unp1(dimension-1,ind); //k
 
        }
 
      else
        {
          yw=0.5*(leq.get_y(ind+1)+leq.get_y(ind));
          Uw=0.5*(leq.get_Unp1(dimension-1,ind+1)+leq.get_Unp1(dimension-1,ind)); //k
        }
 
      if (Uw<0.)
        {
          a = visco_cin + 1.e-10;
        }
 
      else
        {
          vv_bar=ech.calculer_vv_bar(yw, Uw, u, visco_cin);
          l_mu=ech.calculer_l_mu(yw, Uw, u, visco_cin);
          visco_turb =l_mu*sqrt(vv_bar);
          a = visco_cin + visco_turb;
        }
    }
 
  return a;
 
}
 
 
 
/////////////////////////////////////////////////////////////////////////////////////
//                                                                                 //
//  La viscosite turbulente est calculee grace a un modele k_epsilon :                   //
//  nu_t = l_mu*sqrt(vv_bar)                                                      //
//                                                                                      //
//                                                                                 //
/////////////////////////////////////////////////////////////////////////////////////