Fluide_Ostwald.cpp

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// New fluid: a non-Newtonian incompressible fluid. It derives from
//   Fluide_Incompressible and has additional properties (K, N).
//   mu depends on K, N, and grad(U).
 
#include <Fluide_Ostwald.h>
#include <Probleme_base.h>
#include <Discret_Thyd.h>
 
#include <Navier_Stokes_std.h>
#include <Param.h>
 
Implemente_instanciable_sans_constructeur(Fluide_Ostwald,"Fluide_Ostwald",Fluide_Incompressible);
// XD fluide_ostwald fluide_incompressible fluide_ostwald INHERITS_BRACE Non-Newtonian fluids governed by Ostwald\'s
// XD_CONT law. The law applicable to stress tensor is: NL2 tau=K(T)*(D:D/2)**((n-1)/2)*D Where: NL2 D refers to the
// XD_CONT deformation tensor NL2 K refers to fluid consistency (may be a function of the temperature T) NL2 n refers to
// XD_CONT the fluid structure index n=1 for a Newtonian fluid, n<1 for a rheofluidifier fluid, n>1 for a rheothickening
// XD_CONT fluid.
// XD attr k field_base k OPT Fluid consistency.
// XD attr n field_base n OPT Fluid structure index.
 
Fluide_Ostwald::Fluide_Ostwald() { }
 
Sortie& Fluide_Ostwald::printOn(Sortie& s ) const
{
  s<<"{"<<finl;
  s<<"K"<<K_<<finl;
  //  s<<"beta_co"<<beta_co<<finl;
  s<<"N"<<N_<<finl;
  Milieu_base::ecrire(s);
  s<<"}"<<finl;
  return s;
}
 
Entree& Fluide_Ostwald::readOn(Entree& is)
{
  Fluide_Incompressible::readOn(is);
  return is;
}
 
void Fluide_Ostwald::set_param(Param& param) const
{
  Fluide_Incompressible::set_param(param);
  param.ajouter_condition("is_read_rho","Density rho has not been read for a Fluide_Ostwald type medium.");
  param.ajouter("K",&K_,Param::REQUIRED);
  param.ajouter("n",&N_,Param::REQUIRED);
}
 
void Fluide_Ostwald::discretiser(const Probleme_base& pb, const  Discretisation_base& dis)
{
  const Domaine_dis_base& domaine_dis=pb.equation(0).domaine_dis();
  const Discret_Thyd& dis2=ref_cast(Discret_Thyd, dis);
 
  // with the Ostwald signature ...
  const Navier_Stokes_std& eqn_hydr=ref_cast(Navier_Stokes_std,pb.equation(0));
  // Typing mu field
  Nom dis_nam = dis.que_suis_je();
  if (dis_nam.debute_par("VEF")) dis_nam = "VEF";
  ch_mu_.typer(Nom("Champ_Ostwald_") + dis_nam);
 
  dis2.proprietes_physiques_fluide_Ostwald(eqn_hydr.domaine_dis(),(*this),eqn_hydr,eqn_hydr.inconnue());
  if (K_)
    {
      dis.nommer_completer_champ_physique(domaine_dis,"consistance","kg/m/s",K_.valeur(),pb);
      champs_compris_.ajoute_champ(K_.valeur());
    }
 
  Fluide_Incompressible::discretiser(pb,dis);
}
 
void Fluide_Ostwald::creer_champs_non_lus()
{
  Milieu_base::creer_champs_non_lus();
}
 
void Fluide_Ostwald::mettre_a_jour(double tps)
{
  K_->mettre_a_jour(tps);
  if (N_ )
    N_->mettre_a_jour(tps);
  Fluide_Incompressible::mettre_a_jour(tps);
}
 
int Fluide_Ostwald::initialiser(const double temps)
{
  return Fluide_Incompressible::initialiser(temps);
}