Modele_turbulence_hyd_LES_selectif_VDF.cpp

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#include <Modele_turbulence_hyd_LES_selectif_VDF.h>
#include <VDF_discretisation.h>
#include <Champ_Face_VDF.h>
#include <Equation_base.h>
#include <Domaine_VDF.h>
#include <math.h>
 
Implemente_instanciable_sans_constructeur(Modele_turbulence_hyd_LES_selectif_VDF, "Modele_turbulence_hyd_sous_maille_selectif_VDF", Modele_turbulence_hyd_LES_VDF);
 
constexpr double SIN2ANGL = 11697778e-8; // sin(20 degre)
 
Modele_turbulence_hyd_LES_selectif_VDF::Modele_turbulence_hyd_LES_selectif_VDF()
{
  Csm1_ = CSMS1;
  Csm2_ = 1.146;  // si CSM1 = 0.112  (autre 0.162)
  //  CSM2 = 27/8*M_PI^2*CSM1^2*C_k^3
}
 
Sortie& Modele_turbulence_hyd_LES_selectif_VDF::printOn(Sortie& s) const
{
  return s << que_suis_je() << " " << le_nom();
}
 
Entree& Modele_turbulence_hyd_LES_selectif_VDF::readOn(Entree& s)
{
  return Modele_turbulence_hyd_LES_VDF::readOn(s);
}
 
void Modele_turbulence_hyd_LES_selectif_VDF::discretiser()
{
  Modele_turbulence_hyd_LES_base::discretiser();
  const VDF_discretisation& dis = ref_cast(VDF_discretisation, mon_equation_->discretisation());
  dis.vorticite(mon_equation_->domaine_dis(), mon_equation_->inconnue(), la_vorticite_);
}
 
int Modele_turbulence_hyd_LES_selectif_VDF::a_pour_Champ_Fonc(const Motcle& mot,
                                                              OBS_PTR(Champ_base) &ch_ref) const
{
  Motcles les_motcles(3);
  {
    les_motcles[0] = "viscosite_turbulente";
    les_motcles[1] = "k";
    les_motcles[2] = "vorticite";
 
  }
  int rang = les_motcles.search(mot);
  switch(rang)
    {
    case 0:
      {
        ch_ref = la_viscosite_turbulente_.valeur();
        return 1;
      }
    case 1:
      {
        ch_ref = energie_cinetique_turb_.valeur();
        return 1;
      }
    case 2:
      {
        ch_ref = la_vorticite_.valeur();
        return 1;
      }
    default:
      return 0;
    }
}
 
void Modele_turbulence_hyd_LES_selectif_VDF::calculer_fonction_structure()
{
 
  Modele_turbulence_hyd_LES_VDF::calculer_fonction_structure();
  cutoff();
}
 
// Fonction qui permet d'appliquer un filtre sur la fonction de structure
// La fonction de structure d'un element est mise a zero si il existe une
// deviation inferieure a 20 degres entre son vecteur vorticite et le
// vecteur moyen des vorticites des 6 elements les plus proches
// La constante Sin2Angl contient le carre du sinus d'un angle de 20 degres
 
void Modele_turbulence_hyd_LES_selectif_VDF::cutoff()
{
  const Champ_Face_VDF& vitesse = ref_cast(Champ_Face_VDF, mon_equation_->inconnue());
  const Domaine_VDF& domaine_VDF = ref_cast(Domaine_VDF, le_dom_VF_.valeur());
  const IntTab& face_voisins = domaine_VDF.face_voisins();
  const IntTab& elem_faces = domaine_VDF.elem_faces();
  int nb_poly = domaine_VDF.domaine().nb_elem();
  DoubleTab& vorticite = la_vorticite_->valeurs();
 
  la_vorticite_->mettre_a_jour(vitesse.temps());
  vorticite.echange_espace_virtuel();
 
  int elx0, elx1, ely0, ely1, elz0, elz1, i;
  double norme, norme_moyen, prod;
  DoubleVect vorti_moyen(3);
 
  for (int num_elem = 0; num_elem < nb_poly; num_elem++)
    {
      elx0 = face_voisins(elem_faces(num_elem, 0), 0);
      elx1 = face_voisins(elem_faces(num_elem, 3), 1);
      ely0 = face_voisins(elem_faces(num_elem, 1), 0);
      ely1 = face_voisins(elem_faces(num_elem, 4), 1);
      elz0 = face_voisins(elem_faces(num_elem, 2), 0);
      elz1 = face_voisins(elem_faces(num_elem, 5), 1);
 
      double dx0 = 0., dx1 = 0., dy0 = 0., dy1 = 0., dz0 = 0., dz1 = 0.;
      for (i = 0; i < 3; i++)
        {
          if (elx0 != -1)
            dx0 += domaine_VDF.dist_elem_period(num_elem, elx0, i) * domaine_VDF.dist_elem_period(num_elem, elx0, i);
          if (elx1 != -1)
            dx1 += domaine_VDF.dist_elem_period(num_elem, elx1, i) * domaine_VDF.dist_elem_period(num_elem, elx1, i);
          if (ely0 != -1)
            dy0 += domaine_VDF.dist_elem_period(num_elem, ely0, i) * domaine_VDF.dist_elem_period(num_elem, ely0, i);
          if (ely1 != -1)
            dy1 += domaine_VDF.dist_elem_period(num_elem, ely1, i) * domaine_VDF.dist_elem_period(num_elem, ely1, i);
          if (elz0 != -1)
            dz0 += domaine_VDF.dist_elem_period(num_elem, elz0, i) * domaine_VDF.dist_elem_period(num_elem, elz0, i);
          if (elz1 != -1)
            dz1 += domaine_VDF.dist_elem_period(num_elem, elz1, i) * domaine_VDF.dist_elem_period(num_elem, elz1, i);
        }
 
      if (std::fabs(dx0) > DMINFLOAT)
        dx0 = 1. / sqrt(dx0);
      if (std::fabs(dx1) > DMINFLOAT)
        dx1 = 1. / sqrt(dx1);
      if (std::fabs(dy0) > DMINFLOAT)
        dy0 = 1. / sqrt(dy0);
      if (std::fabs(dy1) > DMINFLOAT)
        dy1 = 1. / sqrt(dy1);
      if (std::fabs(dz0) > DMINFLOAT)
        dz0 = 1. / sqrt(dz0);
      if (std::fabs(dz1) > DMINFLOAT)
        dz1 = 1. / sqrt(dz1);
 
      if ((elx0 != -1) && (elx1 != -1) && (ely0 != -1) && (ely1 != -1) && (elz0 != -1) && (elz1 != -1))
        // Cas d'un element interne
        {
          for (int k = 0; k < 3; k++)
            vorti_moyen(k) = (dx0 * vorticite(elx0, k) + dx1 * vorticite(elx1, k) + dy0 * vorticite(ely0, k) + dy1 * vorticite(ely1, k) + dz0 * vorticite(elz0, k) + dz1 * vorticite(elz1, k))
                             / (dx0 + dx1 + dy0 + dy1 + dz0 + dz1);
        }
      else if ((elx0 != -1) && (elx1 != -1) && (ely0 != -1) && (ely1 != -1))
        {
          for (int k = 0; k < 3; k++)
            vorti_moyen(k) = (dx0 * vorticite(elx0, k) + dx1 * vorticite(elx1, k) + dy0 * vorticite(ely0, k) + dy1 * vorticite(ely1, k)) / (dx0 + dx1 + dy0 + dy1);
        }
      else if ((elx0 != -1) && (elx1 != -1) && (elz0 != -1) && (elz1 != -1))
        {
          for (int k = 0; k < 3; k++)
            vorti_moyen(k) = (dx0 * vorticite(elx0, k) + dx1 * vorticite(elx1, k) + dz0 * vorticite(elz0, k) + dz1 * vorticite(elz1, k)) / (dx0 + dx1 + dz0 + dz1);
        }
      else if ((ely0 != -1) && (ely1 != -1) && (elz0 != -1) && (elz1 != -1))
        {
          for (int k = 0; k < 3; k++)
            vorti_moyen(k) = (dy0 * vorticite(ely0, k) + dy1 * vorticite(ely1, k) + dz0 * vorticite(elz0, k) + dz1 * vorticite(elz1, k)) / (dy0 + dy1 + dz0 + dz1);
        }
      else if ((elx0 != -1) && (elx1 != -1))
        {
          for (int k = 0; k < 3; k++)
            vorti_moyen(k) = (dx0 * vorticite(elx0, k) + dx1 * vorticite(elx1, k)) / (dx0 + dx1);
        }
      else if ((ely0 != -1) && (ely1 != -1))
        {
          for (int k = 0; k < 3; k++)
            vorti_moyen(k) = (dy0 * vorticite(ely0, k) + dy1 * vorticite(ely1, k)) / (dy0 + dy1);
        }
      else if ((elz0 != -1) && (elz1 != -1))
        {
          for (int k = 0; k < 3; k++)
            vorti_moyen(k) = (dz0 * vorticite(elz0, k) + dz1 * vorticite(elz1, k)) / (dz0 + dz1);
        }
      else  // Cas d'un element coin ; on met FS a zero
        // On rend nul le vecteur vorti_moyen(k) ce qui provoquera la mise a zero de FS
        {
          for (int k = 0; k < 3; k++)
            vorti_moyen(k) = 0;
        }
 
      // Calcul du produit vectoriel entre la vorticite dans l'element
      // et le vecteur des vorticites des elements voisins
 
      norme = 0;
      int k;
      for (k = 0; k < 3; k++)
        norme += carre(vorticite(num_elem, k));
 
      norme_moyen = 0;
      for (k = 0; k < 3; k++)
        norme_moyen += carre(vorti_moyen(k));
 
      if ((norme > 1.e-10) && (norme_moyen > 1.e-10))
        {
          prod = carre(vorti_moyen(1) * vorticite(num_elem, 2) - vorti_moyen(2) * vorticite(num_elem, 1)) + carre(vorti_moyen(2) * vorticite(num_elem, 0) - vorti_moyen(0) * vorticite(num_elem, 2))
                 + carre(vorti_moyen(0) * vorticite(num_elem, 1) - vorti_moyen(1) * vorticite(num_elem, 0));
          prod /= (norme * norme_moyen);
 
          if (prod <= SIN2ANGL)
            F2_(num_elem) = 0;
        }
      else
        // bruit numerique ou element de coin
        F2_(num_elem) = 0;
 
    }
  // Vu ou etait l'echange avant ca plantait des que le nbre de maille
  // etait different sur un des procs !!!!
  F2_.echange_espace_virtuel();
}