Paroi_Cisaillement_Imp_VEF.cpp

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#include <Paroi_Cisaillement_Imp_VEF.h>
#include <Champ_P1NC.h>
#include <Fluide_base.h>
#include <Champ_Uniforme.h>
#include <Dirichlet_paroi_fixe.h>
#include <Modele_turbulence_hyd_base.h>
 
Implemente_instanciable(Paroi_Cisaillement_Imp_VEF,"UTAU_IMP_VEF",Paroi_hyd_base_VEF);
 
//     printOn()
/////
 
Sortie& Paroi_Cisaillement_Imp_VEF::printOn(Sortie& s) const
{
  return s << que_suis_je() << " " << le_nom();
}
 
//// readOn
//
 
Entree& Paroi_Cisaillement_Imp_VEF::readOn(Entree& s)
{
  return lire_donnees(s);
}
 
 
/////////////////////////////////////////////////////////////////////
//
//  Implementation des fonctions de la classe Paroi_Cisaillement_Imp_VEF
//
/////////////////////////////////////////////////////////////////////
 
int Paroi_Cisaillement_Imp_VEF::init_lois_paroi()
{
  Paroi_hyd_base_VEF::init_lois_paroi_();
  return 1;
}
 
int Paroi_Cisaillement_Imp_VEF::calculer_hyd(DoubleTab& tab_k_eps)
{
  calculer_hyd_commun();
  return 1;
}  // fin de calcul_hyd (K-eps)
 
int Paroi_Cisaillement_Imp_VEF::calculer_hyd_BiK(DoubleTab& tab_k,DoubleTab& tab_eps)
{
  calculer_hyd_commun();
  return 1;
}  // fin de calcul_hyd (K-eps bicephale)
 
int Paroi_Cisaillement_Imp_VEF::calculer_hyd(DoubleTab& tab_nu_t,DoubleTab& tab_k)
{
  calculer_hyd_commun();
  return 1;
}  // fin de calcul_hyd (LES)
 
int Paroi_Cisaillement_Imp_VEF::calculer_hyd_commun()
{
  const Domaine_VEF& domaine_VEF = ref_cast(Domaine_VEF, le_dom_dis_.valeur());
  const IntTab& face_voisins = domaine_VEF.face_voisins();
  const Equation_base& eqn_hydr = mon_modele_turb_hyd->equation();
  const Fluide_base& le_fluide = ref_cast(Fluide_base, eqn_hydr.milieu());
  const Champ_Don_base& ch_visco_cin = le_fluide.viscosite_cinematique();
  const DoubleTab& vit = eqn_hydr.inconnue().valeurs();
  const DoubleTab& tab_visco = ch_visco_cin.valeurs();
  const Domaine& domaine = domaine_VEF.domaine();
  int nfac = domaine.nb_faces_elem();
  const DoubleTab& xv = domaine_VEF.xv();    // centre de gravite des faces
  const DoubleTab& face_normale = domaine_VEF.face_normales();
 
  ArrOfDouble v(dimension);
  DoubleVect pos(dimension);
  double visco=-1;
  int l_unif;
  int n_bord;
 
  tab_u_star_.resize(le_dom_dis_->nb_faces_tot());
  tab_d_plus_.resize(le_dom_dis_->nb_faces_tot());
 
 
  if (sub_type(Champ_Uniforme,ch_visco_cin))
    {
      visco = std::max(tab_visco(0,0),DMINFLOAT);
      l_unif = 1;
    }
  else
    l_unif = 0;
 
  if ((!l_unif) && (tab_visco.local_min_vect()<DMINFLOAT))
    //   on ne doit pas changer tab_visco ici !
    {
      Cerr << "In Paroi_Cisaillement_Imp_VEF::calculer_hyd_commun : visco = " << tab_visco.local_min_vect() << " <= 0 ? " << finl;
      throw;
    }
  //tab_visco+=DMINFLOAT;
 
  int ndeb,nfin;
  double norm_v=-1;
  double d_visco;
 
  // Boucle sur les bords
  int nb_bords=domaine_VEF.nb_front_Cl();
  for (n_bord=0; n_bord<nb_bords; n_bord++)
    {
      // pour chaque condition limite on regarde son type
      // On applique les lois de paroi uniquement
      // aux voisinages des parois
 
      const Cond_lim& la_cl = le_dom_Cl_dis_->les_conditions_limites(n_bord);
      if (sub_type(Dirichlet_paroi_fixe,la_cl.valeur()) )
        {
          const Front_VF& le_bord = ref_cast(Front_VF,la_cl->frontiere_dis());
          const IntTab& elem_faces = domaine_VEF.elem_faces();
          ndeb = le_bord.num_premiere_face();
          nfin = ndeb + le_bord.nb_faces();
 
          for (int num_face=ndeb; num_face<nfin; num_face++)
            {
              int elem = face_voisins(num_face,0);
              if (sub_type(Champ_P1NC,eqn_hydr.inconnue())) // donc triangle ou tetraedre
                {
 
                  // Calcul la moyenne de la vitesse et de la position aux faces (autre que bord) dans l'elem.
                  v=0.;
                  int Compte_face = 0;
                  for (int i=0; i<nfac; i++)
                    if (domaine_VEF.premiere_face_int()<=elem_faces(elem,i))
                      {
                        int face = elem_faces(elem,i);
                        for (int dim=0; dim<dimension; dim++)
                          {
                            v[dim] += vit(face,dim);
                            pos[dim] += xv(face,dim);
                          }
                        Compte_face+=1 ;
                      }
                  for (int dim=0; dim<dimension; dim++)
                    {
                      v[dim]/=Compte_face ;
                      pos[dim]/=Compte_face ;
                    }
 
                  // Projection de la vitesse dans le plan tangentiel
                  double scal=0;
                  for (int dim=0; dim<dimension; dim++)
                    scal+=v[dim]*face_normale(num_face,dim);
                  double surf=0;
                  for (int dim=0; dim<dimension; dim++)
                    surf+=carre(face_normale(num_face,dim));
                  scal/=surf;
                  for (int dim=0; dim<dimension; dim++)
                    v[dim]-=face_normale(num_face,dim)*scal;
 
                  // Calcul de la norme
                  norm_v=0;
                  for (int dim=0; dim<dimension; dim++)
                    norm_v+=carre(v[dim]);
                  norm_v=sqrt(norm_v);
                }
              else
                {
                  Cerr << " On ne sait traiter que des champs P1NC dans Paroi_Cisaillement_Imp_VEF::calculer_hyd" << finl;
                  Process::exit();
                }
 
              double dist=distance_face_elem(num_face,elem,domaine_VEF);
              if (l_unif)
                d_visco = visco;
              else
                d_visco = tab_visco[elem];
 
              // Calcul de la contrainte tangentielle
              double ustar = calculer_utau(pos, norm_v, d_visco);
 
              tab_u_star_(num_face)=ustar;
              tab_d_plus_(num_face)=dist*ustar/d_visco;
 
              double norm_tau=ustar*ustar;
              norm_tau/=(norm_v+DMINFLOAT);
              for (int dim=0; dim<dimension; dim++)
                {
                  Cisaillement_paroi_(num_face,dim) = norm_tau*v[dim];
                }
 
            }
 
        } //  fin de Dirichlet_paroi_fixe
    } // fin du for bord CL
 
  return 1;
}  // fin du calcul_hyd (nu-t)