Modele_turbulence_hyd_LES_selectif_mod_VDF.cpp

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#include <Modele_turbulence_hyd_LES_selectif_mod_VDF.h>
#include <VDF_discretisation.h>
#include <Champ_Face_VDF.h>
#include <Domaine_VDF.h>
#include <Equation_base.h>
#include <TRUSTTrav.h>
#include <Param.h>
#include <math.h>
 
#define K_DEF 0.415
 
Implemente_instanciable_sans_constructeur(Modele_turbulence_hyd_LES_selectif_mod_VDF, "Modele_turbulence_hyd_sous_maille_selectif_mod_VDF", Modele_turbulence_hyd_LES_VDF);
 
Sortie& Modele_turbulence_hyd_LES_selectif_mod_VDF::printOn(Sortie& s) const
{
  return s << que_suis_je() << " " << le_nom();
}
 
Entree& Modele_turbulence_hyd_LES_selectif_mod_VDF::readOn(Entree& s)
{
  return Modele_turbulence_hyd_LES_VDF::readOn(s);
}
 
void Modele_turbulence_hyd_LES_selectif_mod_VDF::set_param(Param& param) const
{
  Modele_turbulence_hyd_LES_VDF::set_param(param);
  param.ajouter_non_std("Canal", (this));
  param.ajouter_non_std("THI", (this));
}
 
int Modele_turbulence_hyd_LES_selectif_mod_VDF::lire_motcle_non_standard(const Motcle& mot, Entree& is)
{
  if (mot == "Canal")
    {
      is >> demi_h_;
      is >> dir_par_;
      canal_ = 1;
      Cerr << "The half height of the chanel is :" << demi_h_ << " m" << finl;
      Cerr << "Orientation of the walls is : " << dir_par_ << finl;
      return 1;
    }
  else if (mot == "THI")
    {
      is >> ki_;
      is >> kc_;
      thi_ = 1;
      Cerr << "At initial time, the spectrum peak is located at : " << ki_ << " m-1" << finl;
      Cerr << "The spectrum cut-off is located at : " << kc_ << " m-1" << finl;
      return 1;
    }
  else
    return Modele_turbulence_hyd_LES_VDF::lire_motcle_non_standard(mot, is);
}
 
 
void Modele_turbulence_hyd_LES_selectif_mod_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_mod_VDF::a_pour_Champ_Fonc(const Motcle& mot,
                                                                  OBS_PTR(Champ_base) &ch_ref) const
{
  Motcles les_motcles(7);
  {
    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_mod_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 N degres entre son vecteur vorticite et le
// vecteur moyen des vorticites des 6 elements les plus proches
// l angle de coupure varie en fonction du delta c (2 expressions possibles :
// lineaire ou log)
 
void Modele_turbulence_hyd_LES_selectif_mod_VDF::cutoff()
{
  double Sin2Angl;
  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();
  const DoubleTab& xp = domaine_VDF.xp();
  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;
  double norme, norme_moyen, prod, angle;
  DoubleTrav vorti_moyen(3);
  int i;
  int num_elem;
 
  double lm, rapport;
  double dy, y_elem;
  static double kappa = K_DEF;
  static double a = 23. * M_PI / 180.;
  static double b = -0.4;
  static double borne_y;
  if (canal_ != 0)
    borne_y = 0.2 * demi_h_;
 
  if ((thi_ == 0) && (canal_ == 0))
    {
      Cerr << "Problem with the input data of the sous_maille_selectif_mod model." << finl;
      Cerr << "A necessary parameter : THI or Canal has not been specified." << finl;
      Process::exit();
    }
 
  if ((nb_points_ == 4) && (dir_par_ != dir3_))
    {
      Cerr << "WARNING!!! WARNING!!! Modele_turbulence_hyd_LES_selectif_mod_VDF" << finl;
      Cerr << "A 4 points formulation is used." << finl;
      Cerr << "Your planes are orthogonal to the direction : " << dir3_ << finl;
      Cerr << "while the given direction for the walls is :" << dir_par_ << finl;
      Cerr << "Check that you really wish these directions to be different ..." << finl;
      Cerr << "WARNING!!! WARNING!!! dans Modele_turbulence_hyd_LES_selectif_mod_VDF" << finl;
    }
 
  for (num_elem = 0; num_elem < nb_poly; num_elem++)
    {
 
      if (thi_ != 0)
        {
          rapport = 2. * kc_ / ki_;
        }
      else
        {
          // y_elem : distance entre le centre de l element et la paroi!!
          y_elem = xp(num_elem, dir_par_);
          if (y_elem >= demi_h_)
            y_elem = 2. * demi_h_ - y_elem;
 
          // lm : longueur de melange dans le canal
          if (y_elem < borne_y)
            lm = kappa * y_elem;
          else
            lm = 0.2 * kappa * demi_h_;
 
          // dy : pas de maillage local en y (largeur de filtre local)
          dy = domaine_VDF.dim_elem(num_elem, dir_par_);
 
          // rapport pour la dependance de l angle
          rapport = lm / (2. * dy);
        }
 
      if (rapport <= 1.)
        angle = a;
      else if ((rapport >= 1.) && (rapport < 10.))
        angle = a * pow(rapport, b);
      else
        angle = 9. * M_PI / 180.;
 
      Sin2Angl = sin(angle);
      Sin2Angl *= Sin2Angl;
 
      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);
      //dist_elem_period(int n1, int n2, int k)
      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;
 
    }
  F2_.echange_espace_virtuel();
}