Paroi_frottante_simple.cpp

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#include <Paroi_frottante_simple.h>
 
#include <Op_Dift_Multiphase_VDF_Face.h>
#include <Op_Diff_PolyMAC_MPFA_base.h>
#include <Loi_paroi_adaptative.h>
#include <Frontiere_dis_base.h>
#include <Navier_Stokes_std.h>
#include <Pb_Multiphase.h>
#include <Domaine_VF.h>
#include <Frontiere.h>
#include <Motcle.h>
 
#include <math.h>
 
Implemente_instanciable(Paroi_frottante_simple,"Paroi_frottante_simple", Frottement_global_impose);
// XD Paroi_frottante_simple condlim_base Paroi_frottante_simple BRACE Adaptive wall-law boundary condition for velocity
 
Sortie& Paroi_frottante_simple::printOn(Sortie& s ) const
{
  return s << que_suis_je() << "\n";
}
 
Entree& Paroi_frottante_simple::readOn(Entree& s )
{
  if (app_domains.size() == 0)
    app_domains = { Motcle("turbulence") };
 
  le_champ_front.typer("Champ_front_vide");
  return s;
}
 
void Paroi_frottante_simple::completer()
{
  if (!ref_cast(Operateur_Diff_base, domaine_Cl_dis().equation().operateur(0).l_op_base()).is_turb())
    Process::exit(que_suis_je() + " : diffusion operator must be turbulent !");
}
 
void Paroi_frottante_simple::liste_faces_loi_paroi(IntTab& tab)
{
  const int nf = la_frontiere_dis->frontiere().nb_faces();
  const int f1 = la_frontiere_dis->frontiere().num_premiere_face();
  const int N = tab.line_size();
 
  for (int f = 0 ; f < nf ; f++)
    for (int n = 0 ; n < N ; n++)
      tab(f + f1, n) |= 1;
}
 
int Paroi_frottante_simple::initialiser(double temps)
{
  const int nbp = sub_type(Pb_Multiphase, domaine_Cl_dis().equation().probleme())
                  ? ref_cast(Pb_Multiphase, domaine_Cl_dis().equation().probleme()).nb_phases()
                  : 1;
  valeurs_coeff_.resize(0, nbp);
  la_frontiere_dis->frontiere().creer_tableau_faces(valeurs_coeff_);
  valeurs_coeff_ = 0 ;
 
  valeurs_coeff_grad_.resize(0, nbp);
  la_frontiere_dis->frontiere().creer_tableau_faces(valeurs_coeff_grad_);
  valeurs_coeff_grad_ = 0 ;
 
  correlation_loi_paroi_ = domaine_Cl_dis().equation().probleme().get_correlation("Loi_paroi");
  return 1;
}
 
void Paroi_frottante_simple::mettre_a_jour(double tps)
{
  if (mon_temps < tps)
    {
      me_calculer();
      mon_temps=tps;
    }
}
 
void Paroi_frottante_simple::me_calculer()
{
  Loi_paroi_adaptative& corr_loi_paroi = ref_cast(Loi_paroi_adaptative, correlation_loi_paroi_.valeur());
  const Domaine_VF& domaine = ref_cast(Domaine_VF, domaine_Cl_dis().equation().probleme().domaine_dis());
 
  const DoubleTab& u_tau = corr_loi_paroi.get_tab("u_tau"); // y_p est numerote selon les faces du domaine
  const DoubleTab& nu_visc = ref_cast(Fluide_base, domaine_Cl_dis().equation().probleme().milieu()).viscosite_cinematique().valeurs();
  const DoubleTab& mu_visc = ref_cast(Fluide_base, domaine_Cl_dis().equation().probleme().milieu()).viscosite_dynamique().valeurs();
  const DoubleTab& vit = domaine_Cl_dis().equation().probleme().get_champ("vitesse").passe();
  const DoubleTab& rho = domaine_Cl_dis().equation().probleme().get_champ("masse_volumique").passe();
  const DoubleTab* alp = sub_type(Pb_Multiphase, domaine_Cl_dis().equation().probleme()) ? &domaine_Cl_dis().equation().probleme().get_champ("alpha").passe() : nullptr;
 
  const int cnu = nu_visc.dimension(0) == 1;
  const int cmu = mu_visc.dimension(0) == 1;
  const int cr = rho.dimension(0) == 1;
 
  // On va chercher le mu turbulent de PolyMAC et celui de vdf et on prend le bon dans la suite
  const DoubleTab* mu_poly = domaine.que_suis_je().debute_par("Domaine_PolyMAC") ? &ref_cast(Op_Diff_PolyMAC_MPFA_base, domaine_Cl_dis().equation().operateur(0).l_op_base()).nu() : nullptr;
  const DoubleTab *mu_vdf = domaine.que_suis_je().debute_par("Domaine_VDF") ? &ref_cast(Op_Dift_Multiphase_VDF_Face, domaine_Cl_dis().equation().operateur(0).l_op_base()).get_diffusivite_turbulente() : nullptr;
  assert((mu_poly) || (mu_vdf));
 
  const int nf = la_frontiere_dis->frontiere().nb_faces();
  const int nf_tot = domaine.nb_faces_tot();
  const int f1 = la_frontiere_dis->frontiere().num_premiere_face();
  const int N = domaine_Cl_dis().equation().inconnue().valeurs().line_size();
  const int D = dimension;
 
  const DoubleTab& n_f = domaine.face_normales();
  const DoubleVect& fs = domaine.face_surfaces();
  const IntTab& f_e = domaine.face_voisins();
 
  DoubleTab pvit_elem(0, N * dimension);
  if (mu_vdf)
    {
      const Champ_Face_base& ch = ref_cast(Champ_Face_base, domaine_Cl_dis().equation().probleme().equation(0).inconnue());
      domaine.domaine().creer_tableau_elements(pvit_elem);
      ch.get_elem_vector_field(pvit_elem, true);
    }
 
  int n = 0; // The turbulent phase rubs.
  for (int f = 0; f < nf; f++)
    {
      const int f_domaine = f + f1; // number of the face in the domaine
      const int e = f_e(f_domaine,0) >= 0 ? f_e(f_domaine, 0) : f_e(f_domaine, 1);
 
      double u_orth = 0 ;
      DoubleTrav u_parallel(D);
      if (mu_vdf)
        {
          for (int d = 0; d <D ; d++)
            u_orth -= pvit_elem(e, N*d + n)*n_f(f_domaine,d)/fs(f_domaine); // ! n_f pointe vers la face 1 donc vers l'exterieur de l'element, d'ou le -
          for (int d = 0 ; d < D ; d++)
            u_parallel(d) = pvit_elem(e, N*d+n) - u_orth*(-n_f(f_domaine,d))/fs(f_domaine) ; // ! n_f pointe vers la face 1 donc vers l'exterieur de l'element, d'ou le -
        }
      else // mu_PolyMAC
        {
          for (int d = 0; d < D ; d++)
            u_orth -= vit(nf_tot + e * D+d, n)*n_f(f_domaine,d)/fs(f_domaine); // ! n_f pointe vers la face 1 donc vers l'exterieur de l'element, d'ou le -
          for (int d = 0 ; d < D ; d++)
            u_parallel(d) = vit(nf_tot + e * D + d, n) - u_orth*(-n_f(f_domaine, d))/fs(f_domaine) ; // ! n_f pointe vers la face 1 donc vers l'exterieur de l'element, d'ou le -
        }
      const double norm_u_parallel = std::sqrt(domaine.dot(&u_parallel(0), &u_parallel(0)));
 
      const double y_loc = f_e(f_domaine,0) >=0  ? domaine.dist_face_elem0(f_domaine, e) : domaine.dist_face_elem1(f_domaine, e);
      const double y_plus_loc = y_loc * u_tau(f_domaine, n)/ nu_visc(!cnu * e, n) ;
      const double fac_coeff_grad_ = fac_coeff_grad(y_plus_loc);
      const double mu_tot_loc = (mu_poly) ? ((alp ? 1.0 : rho(!cr * e, n)) * (*mu_poly)(e, n)) : (mu_vdf) ? (*mu_vdf)(e, n) + mu_visc(!cmu * e, n) : -1;
 
      const double rho_loc = rho(!cr * e, n);
      if (y_plus_loc > 1)
        {
          const double u_tau_loc = u_tau(f_domaine, n);
 
          // f_tau = - alpha_k rho_k u_tau**2 n_par, coeff = u_tau**2 /u_par
          valeurs_coeff_(f, n) = (alp ? (*alp)(e, n) * rho_loc : 1) * u_tau_loc*u_tau_loc/norm_u_parallel;
          valeurs_coeff_grad_(f, n) =  fac_coeff_grad_*(alp ? (*alp)(e, n) : 1) * std::min(1./y_loc, 1/mu_tot_loc * rho_loc * u_tau_loc*u_tau_loc/norm_u_parallel);
        }
      else
        {
          // viscous case : if u_tau is small
          valeurs_coeff_(f, n) = (alp ? (*alp)(e, n) * rho_loc : 1) * nu_visc(!cnu * e, n)/y_loc;
          // dirichlet for calculation of gradient
          valeurs_coeff_grad_(f, n) = fac_coeff_grad_*(alp ? (*alp)(e, n) : 1) * 1./y_loc ;
        }
    }
 
  // Treatment of other phases which are supposed not to be turbulent
  for (n = 1; n < N; n++)
    for (int f = 0; f < nf; f++)
      {
        // les phases non turbulentes sont non porteuses : pas de contact paroi => des symmetries
        valeurs_coeff_(f, n) = 0;
        valeurs_coeff_grad_(f, n) = 0;
      }
 
  valeurs_coeff_.echange_espace_virtuel();
  valeurs_coeff_grad_.echange_espace_virtuel();
}