Modele_turbulence_hyd_LES_Wale_VEF.cpp

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#include <Modele_turbulence_hyd_LES_Wale_VEF.h>
#include <Schema_Temps_base.h>
#include <Equation_base.h>
#include <Domaine_VEF.h>
#include <Champ_P1NC.h>
#include <TRUSTTrav.h>
#include <Param.h>
#include <Debog.h>
 
Implemente_instanciable_sans_constructeur(Modele_turbulence_hyd_LES_Wale_VEF, "Modele_turbulence_hyd_sous_maille_Wale_VEF", Modele_turbulence_hyd_LES_VEF_base);
 
Modele_turbulence_hyd_LES_Wale_VEF::Modele_turbulence_hyd_LES_Wale_VEF()
{
  declare_support_masse_volumique(1);
}
 
Sortie& Modele_turbulence_hyd_LES_Wale_VEF::printOn(Sortie& s) const { return s << que_suis_je() << " " << le_nom(); }
 
Entree& Modele_turbulence_hyd_LES_Wale_VEF::readOn(Entree& is) { return Modele_turbulence_hyd_LES_VEF_base::readOn(is); }
 
void Modele_turbulence_hyd_LES_Wale_VEF::set_param(Param& param) const
{
  Modele_turbulence_hyd_LES_VEF_base::set_param(param);
  param.ajouter("cw", &cw_);
  param.ajouter_condition("value_of_cw_ge_0", "sous_maille_Wale model constant must be positive.");
}
 
Champ_Fonc_base& Modele_turbulence_hyd_LES_Wale_VEF::calculer_viscosite_turbulente()
{
  const Domaine_VEF& domaine_VEF = ref_cast(Domaine_VEF, le_dom_VF_.valeur());
  double temps = mon_equation_->inconnue().temps();
  DoubleTab& tab_visco_turb = la_viscosite_turbulente_->valeurs();
  const int nb_elem = domaine_VEF.nb_elem();
  const DoubleTab& la_vitesse = mon_equation_->inconnue().valeurs();
  const Domaine_Cl_VEF& domaine_Cl_VEF = ref_cast(Domaine_Cl_VEF, le_dom_Cl_.valeur());
 
  if (tab_visco_turb.size() != nb_elem)
    {
      Cerr << "Size error for the array containing the values of the turbulent viscosity." << finl;
      exit();
    }
  Debog::verifier("Modele_turbulence_hyd_LES_Wale_VEF::calculer_viscosite_turbulente visco_turb 0", tab_visco_turb);
 
  const int nb_elem_tot = domaine_VEF.nb_elem_tot();
  DoubleTrav tab_duidxj(nb_elem_tot,dimension,dimension);
  // Patrick: we work on the filtered field.
  //const Champ_P1NC& ch=(const Champ_P1NC&) mon_equation->inconnue();
  //DoubleTab ubar(la_vitesse);
  //ch.filtrer_L2(ubar);
  //Champ_P1NC::calcul_gradient(ubar,duidxj,domaine_Cl_VEF);
  Champ_P1NC::calcul_gradient(la_vitesse,tab_duidxj,domaine_Cl_VEF);
 
  double cw = cw_; // Necessary to avoid kernel crash
  int dim = Objet_U::dimension;
 
  CDoubleArrView l = l_.view_ro();
  CDoubleTabView3 duidxj = tab_duidxj.view_ro<3>();
  DoubleArrView visco_turb = static_cast<DoubleVect&>(tab_visco_turb).view_rw();
 
  Kokkos::parallel_for(start_gpu_timer(__KERNEL_NAME__),
                       nb_elem,
                       KOKKOS_LAMBDA (int elem)
  {
    double gij2[3][3];
    double sd[3][3];
 
    // Compute the term gij2.
    for (int i = 0; i < dim; i++)
      for (int j = 0; j < dim; j++)
        {
          gij2[i][j] = 0;
          for (int k = 0; k < dim; k++)
            gij2[i][j] += duidxj(elem,i,k) * duidxj(elem,k,j);
        }
 
    // Compute the term gkk2.
    double gkk2 = 0;
    for (int k = 0; k < dim; k++)
      gkk2 += gij2[k][k];
 
    // Compute sd.
    for (int i = 0; i < dim; i++)
      for (int j = 0; j < dim; j++)
        {
          sd[i][j] = 0.5 * (gij2[i][j] + gij2[j][i]);
          if (i == j)
            sd[i][j] -= gkk2 / 3.; // Term behind the Kronecker tensor.
        }
 
    // Compute sd2 and Sij2.
    double sd2 = 0.;
    double Sij2 = 0.;
    for (int i = 0; i < dim; i++)
      for (int j = 0; j < dim; j++)
        {
          sd2 += sd[i][j] * sd[i][j];
          //Displacement of the Sij computation
          double Sij = 0.5 * (duidxj(elem,i,j) + duidxj(elem,j,i));
          Sij2 += Sij * Sij;
        }
 
    // Compute OP1 and OP2.
    // Replace pow by sqrt and multiply, faster
    //OP1=pow(sd2,1.5);
    double OP1 = sd2 * sqrt(sd2);
    //OP2=pow(Sij2,2.5)+pow(sd2,1.25);
    double OP2 = Sij2 * Sij2 * sqrt(Sij2) + sd2 * sqrt(sqrt(sd2));
 
    if (OP1 != 0.) // so sd2 and OP2 are consequently non-zero
      visco_turb(elem) = cw * cw * l(elem) * l(elem) * OP1 / OP2;
    else
      visco_turb(elem) = 0;
  }); // end of loop over elements
  end_gpu_timer(__KERNEL_NAME__);
 
  Debog::verifier("Modele_turbulence_hyd_LES_Wale_VEF::calculer_viscosite_turbulente visco_turb 1", tab_visco_turb);
 
  la_viscosite_turbulente_->changer_temps(temps);
  return la_viscosite_turbulente_;
}