Source_WC_Chaleur_VDF.cpp

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#include <Convection_Diffusion_Chaleur_WC.h>
#include <Source_WC_Chaleur_VDF.h>
#include <Neumann_sortie_libre.h>
#include <Domaine_Cl_dis_base.h>
#include <Navier_Stokes_WC.h>
#include <Probleme_base.h>
#include <Domaine_VF.h>
 
Implemente_instanciable(Source_WC_Chaleur_VDF,"Source_WC_Chaleur_VDF",Source_WC_Chaleur);
 
Sortie& Source_WC_Chaleur_VDF::printOn(Sortie& os) const
{
  os <<que_suis_je()<< finl;
  return os;
}
 
Entree& Source_WC_Chaleur_VDF::readOn(Entree& is) { return is; }
 
void Source_WC_Chaleur_VDF::associer_domaines(const Domaine_dis_base& domaine,const Domaine_Cl_dis_base& zcl)
{
  associer_domaines_impl(domaine,zcl);
  associer_volume_porosite_impl(domaine,volumes,porosites);
}
 
void Source_WC_Chaleur_VDF::compute_interpolate_gradP(DoubleTab& UgradP_elem, const DoubleTab& Ptot) const
{
  /*
   * NOTA BENE :
   * On a discretise P_EOS avec une directive = temperature qui donne en VDF :
   * Ptot => aux elems
   * la_vitesse => faces car vdf
   * grad_Ptot => faces car vdf
   *
   * Donc u*grad(P_tot) => faces
   * L'equation est une equation de scalaire => aux elems car vdf
   * On a d P_tot / d t = del P / del t + u.grad(P_tot)
   *
   * del P / del t => aux elem
   * u.grad(P_tot) !!! faut l'interpoler aux elems
   */
 
  const Navier_Stokes_WC& eqHyd = ref_cast(Navier_Stokes_WC,mon_equation->probleme().equation(0));
  const DoubleTab& la_vitesse = eqHyd.vitesse().valeurs();
  DoubleTab grad_Ptot(eqHyd.grad_P().valeurs()); // initialized with grad(P) because face-based
  const Convection_Diffusion_Chaleur_WC& eq_chal = ref_cast(Convection_Diffusion_Chaleur_WC,mon_equation.valeur());
  const Operateur_Grad& Op_Grad = eq_chal.operateur_gradient_WC();
  Op_Grad.calculer(Ptot,grad_Ptot); // compute grad(P_tot)
 
  const Domaine_dis_base& domaine_dis = mon_equation->inconnue().domaine_dis_base();
  const Domaine_VF& domaine = ref_cast(Domaine_VF, domaine_dis);
  assert (domaine_dis.que_suis_je() == "Domaine_VDF");
 
  // grad should be zero at boundary
  correct_grad_boundary(domaine,grad_Ptot);
 
  // We compute u*grad(P_tot) on each face
  DoubleTab UgradP(grad_Ptot); // field on faces
  const int n = la_vitesse.dimension_tot(0);
  assert ( n == domaine.nb_faces_tot() && la_vitesse.line_size() == 1);
  assert ( Ptot.dimension_tot(0) == domaine.nb_elem_tot() );
 
  for (int i=0 ; i <n ; i++) UgradP(i,0) = la_vitesse(i,0) * grad_Ptot(i,0);
  face_to_elem(domaine,UgradP,UgradP_elem);
}
 
// Could use the static methods of Discretisation_tools... but a Champ_base needs to be created ...
void Source_WC_Chaleur_VDF::face_to_elem(const Domaine_VF& domaine, const DoubleTab& UgradP,DoubleTab& UgradP_elem) const
{
  const IntTab& elem_faces = domaine.elem_faces();
  const int nb_face_elem = elem_faces.line_size(), nb_elem_tot= domaine.nb_elem_tot();
  assert (UgradP_elem.dimension_tot(0) == nb_elem_tot && UgradP.dimension_tot(0) == domaine.nb_faces_tot());
 
  UgradP_elem = 0.;
  for (int ele=0; ele<nb_elem_tot; ele++)
    for (int s=0; s<nb_face_elem; s++) UgradP_elem(ele,0) += UgradP(elem_faces(ele,s),0);
 
  UgradP_elem *= 0.5;
}
 
// works well but not suitable for vef ... P in vef is everywhere, grad on faces but not suitable for us
void Source_WC_Chaleur_VDF::compute_interpolate_gradP_old(DoubleTab& UgradP_elem, const DoubleTab& Ptot) const
{
  // compute the grad
  const Navier_Stokes_WC& eqHyd = ref_cast(Navier_Stokes_WC,mon_equation->probleme().equation(0));
  const DoubleTab& la_vitesse = eqHyd.vitesse().valeurs();
  DoubleTab grad_Ptot(eqHyd.grad_P().valeurs()); // initialized with grad(P) because face-based
  const Operateur_Grad& gradient = eqHyd.operateur_gradient(); // retrieve the NS gradient operator
  gradient.calculer(Ptot,grad_Ptot); // compute grad(P_tot)
 
  // XXX : very important : otherwise we have values * V !
  eqHyd.solv_masse().appliquer(grad_Ptot);
 
  /*
   * XXX XXX XXX
   * READ CAREFULLY : We use the grad operator from Navier_Stokes_std
   *    => created for the pressure normally
   * There is a special treatement for Neumann bc (Neumann_sortie_libre)
   * because we use explicitly the prescribed pressure.
   * So if we calculate the grad of Ptot or rho for example, we will use
   * P_ext defined in data file which is wrong !
   *
   * Now we do the following : we assume open bd as a wall => null gradient
   */
 
  // We use that of NS because we test the CL too (attention mon_equation is Chaleur...)
  const Domaine_dis_base& domaine_dis = eqHyd.inconnue().domaine_dis_base();
  const Domaine_VF& domaine = ref_cast(Domaine_VF, domaine_dis);
  const Domaine_Cl_dis_base& domaine_cl = eqHyd.domaine_Cl_dis();
  assert (domaine_dis.que_suis_je() == "Domaine_VDF");
 
  for (int n_bord=0; n_bord<domaine.nb_front_Cl(); n_bord++)
    {
      const Cond_lim& la_cl = domaine_cl.les_conditions_limites(n_bord);
      // corrige si Neumann_sortie_libre
      if ( sub_type(Neumann_sortie_libre,la_cl.valeur()) )
        {
          // retrieve face and replace gradient by 0
          const Front_VF& le_bord = ref_cast(Front_VF,la_cl->frontiere_dis());
          const int ndeb = le_bord.num_premiere_face(), nfin = ndeb + le_bord.nb_faces();
 
          for (int num_face=ndeb; num_face<nfin; num_face++) grad_Ptot(num_face,0) = 0.;
        }
    }
 
  // We compute u*grad(P_tot) on each face
  DoubleTab UgradP(grad_Ptot); // field on faces
  const int n = la_vitesse.dimension(0);
  assert ( n == domaine.nb_faces() );
  assert ( Ptot.dimension(0) == domaine.nb_elem() );
  for (int i=0 ; i <n ; i++) UgradP(i,0) = la_vitesse(i,0) * grad_Ptot(i,0);
  face_to_elem(domaine,UgradP,UgradP_elem);
}