Flux_radiatif_VDF.cpp

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#include <Frontiere_ouverte_temperature_imposee_rayo_semi_transp.h>
#include <Echange_externe_impose_rayo_semi_transp.h>
#include <Echange_global_impose_rayo_semi_transp.h>
#include <Echange_contact_rayo_semi_transp_VDF.h>
#include <Frontiere_ouverte_rayo_semi_transp.h>
#include <Neumann_paroi_rayo_semi_transp_VDF.h>
#include <Champ_front_uniforme.h>
#include <Eq_rayo_semi_transp.h>
#include <Pb_rayo_semi_transp.h>
#include <Flux_radiatif_VDF.h>
#include <Schema_Temps_base.h>
#include <Champ_Uniforme.h>
#include <Fluide_base.h>
#include <Domaine_VDF.h>
#include <Debog.h>
 
Implemente_instanciable(Flux_radiatif_VDF, "Flux_radiatif_VDF", Flux_radiatif_base);
 
Sortie& Flux_radiatif_VDF::printOn(Sortie& s) const { return s << que_suis_je() << finl; }
Entree& Flux_radiatif_VDF::readOn(Entree& s) { return Flux_radiatif_base::readOn(s); }
 
void Flux_radiatif_VDF::evaluer_cl_rayonnement(Champ_front_base& Tb, const Champ_Don_base& coeff_abs, const Champ_Don_base& longueur_rayo,
                                               const Champ_Don_base& indice, const Domaine_VF& zvf,
                                               const double sigma, double temps)
{
  const DoubleTab& l_rayo = longueur_rayo.valeurs();
  const DoubleTab& n = indice.valeurs();
  const DoubleTab& epsilon = emissivite().valeurs();
  const DoubleTab& kappa = coeff_abs.valeurs();
 
  const Domaine_VDF& zvdf = ref_cast(Domaine_VDF, zvf);
  const Front_VF& le_bord = ref_cast(Front_VF, frontiere_dis());
  const IntTab& face_voisins = zvdf.face_voisins();
 
  // On dimensionne le_champ_front
  assert(le_champ_front->nb_comp() == 1);
  DoubleTab& tab = le_champ_front->valeurs_au_temps(temps);
  tab.resize(le_bord.nb_faces(), le_champ_front->nb_comp());
 
  assert(indice.nb_comp() == 1);
  assert(longueur_rayo.nb_comp() == 1);
  assert(coeff_abs.nb_comp() == 1);
  assert(Tb.nb_comp() == 1);
  assert(emissivite().nb_comp() == 1);
 
  const int ndeb = le_bord.num_premiere_face();
  const int nfin = ndeb + le_bord.nb_faces();
  double nn = -123., k = -123., l_r = -123.;
  double epsi = -123., T = -123.;
 
  // Boucle sur les faces de le_bord
  for (int face = ndeb; face < nfin; face++)
    {
      int elem = face_voisins(face, 0);
 
      const double eF = zvdf.dist_norm_bord(face);
 
      if (sub_type(Champ_Uniforme, indice))
        nn = n(0, 0);
      else
        nn = n(elem, 0);
 
      if (sub_type(Champ_Uniforme, longueur_rayo))
        l_r = l_rayo(0, 0);
      else
        l_r = l_rayo(elem, 0);
 
      if (sub_type(Champ_Uniforme, coeff_abs))
        k = kappa(0, 0);
      else
        k = kappa(elem, 0);
 
      // determination de la temperature de paroi en fonction de la face consideree
      if (sub_type(Champ_front_uniforme, Tb))
        T = Tb.valeurs()(0, 0);
      else
        T = Tb.valeurs_au_temps(temps)(face - ndeb, 0);
 
      // Determination de l'emissivite de paroi en fonction de la face consideree
      if (sub_type(Champ_front_uniforme, emissivite()))
        epsi = epsilon(0, 0);
      else
        epsi = epsilon(face - ndeb, 0);
 
      // Remplissage de la condition a la limite pour l'equation de rayonnement
      double numer_coeff = l_r;
      numer_coeff *= 4 * nn * nn * sigma * pow(T, 4);
 
      double denum_coeff = 3 * k * epsi;
      denum_coeff = 1 / denum_coeff;
      denum_coeff *= A_ * (2 - epsi);
      denum_coeff = denum_coeff + eF;
 
      if (epsi < DMINFLOAT)
        tab(face - ndeb, 0) = 0.;
      else
        tab(face - ndeb, 0) =  numer_coeff / denum_coeff;
    }
 
  tab.echange_espace_virtuel();
}
 
void Flux_radiatif_VDF::calculer_flux_radiatif(const Equation_base& eq_temp)
{
  // On doit recuperer la temperature de bord
  const Front_VF& le_bord = ref_cast(Front_VF, frontiere_dis());
  const int nb_faces = le_bord.nb_faces();
  const Conds_lim& les_cl_temp = eq_temp.domaine_Cl_dis().les_conditions_limites();
  OBS_PTR(Champ_front_base) Tb;
 
  int test_nom = 0;
  for (int num_cl_temp = 0; num_cl_temp < les_cl_temp.size(); num_cl_temp++)
    {
      const Cond_lim& la_cl_temp = eq_temp.domaine_Cl_dis().les_conditions_limites(num_cl_temp);
      Nom nom_cl_temp = la_cl_temp->frontiere_dis().le_nom();
      if (nom_cl_temp == frontiere_dis().le_nom())
        {
          test_nom = 1;
          if (sub_type(Neumann_paroi_rayo_semi_transp_VDF, la_cl_temp.valeur()))
            {
              const Neumann_paroi_rayo_semi_transp_VDF& la_cl_temper = ref_cast(Neumann_paroi_rayo_semi_transp_VDF, la_cl_temp.valeur());
              Tb = la_cl_temper.temperature_bord();
            }
          else if (sub_type(Echange_contact_rayo_semi_transp_VDF, la_cl_temp.valeur()))
            {
              Echange_contact_rayo_semi_transp_VDF& la_cl_temper = ref_cast_non_const(Echange_contact_rayo_semi_transp_VDF, la_cl_temp.valeur());
              Tb = la_cl_temper.temperature_bord();
            }
          else if (sub_type(Echange_externe_impose_rayo_semi_transp, la_cl_temp.valeur()))
            {
              Echange_externe_impose_rayo_semi_transp& la_cl_temper = ref_cast_non_const(Echange_externe_impose_rayo_semi_transp, la_cl_temp.valeur());
              Tb = la_cl_temper.temperature_bord();
            }
          else if (sub_type(Frontiere_ouverte_temperature_imposee_rayo_semi_transp, la_cl_temp.valeur()))
            {
              const Frontiere_ouverte_temperature_imposee_rayo_semi_transp& la_cl_temper = ref_cast(Frontiere_ouverte_temperature_imposee_rayo_semi_transp, la_cl_temp.valeur());
              Tb = la_cl_temper.temperature_bord();
            }
          else if (sub_type(Frontiere_ouverte_rayo_semi_transp, la_cl_temp.valeur()))
            {
              const Frontiere_ouverte_rayo_semi_transp& la_cl_temper = ref_cast(Frontiere_ouverte_rayo_semi_transp, la_cl_temp.valeur());
              Tb = la_cl_temper.temperature_bord();
            }
          else if (sub_type(Echange_global_impose_rayo_semi_transp, la_cl_temp.valeur()))
            {
              Echange_global_impose_rayo_semi_transp& la_cl_temper = ref_cast_non_const(Echange_global_impose_rayo_semi_transp, la_cl_temp.valeur());
              Tb = la_cl_temper.temperature_bord();
            }
          else
            {
              Cerr << "Coder pour les autres condition limites de l'equation de temperature 1 " << finl;
              Process::exit();
            }
        }
    }
  if (test_nom == 0)
    {
      Cerr << "Erreur : il n'y a pas de condition limite sur une frontiere portant le nom : " << le_nom() << finl;
      Process::exit();
    }
 
  // Tb contient les temperatures de bord
  // Calcul du flux radiatif
  DoubleTab& Flux = flux_radiatif_->valeurs();
  Flux.resize(le_bord.nb_faces(), 1);
  const Eq_rayo_semi_transp& eq_rayo = ref_cast(Eq_rayo_semi_transp, domaine_Cl_dis().equation());
  const Fluide_base& fluide = eq_rayo.fluide();
  const DoubleTab& kappa = fluide.kappa().valeurs();
  const DoubleTab& indice = fluide.indice().valeurs();
  const DoubleTab& irradiance = eq_rayo.inconnue().valeurs();
 
  const Domaine_VDF& zvdf = ref_cast(Domaine_VDF, domaine_Cl_dis().domaine_dis());
  const IntTab& face_voisins = zvdf.face_voisins();
  const DoubleVect& face_surfaces = zvdf.face_surfaces();
  const double sigma = eq_rayo.pb_rayo_semi_transp().valeur_sigma();
 
  assert(fluide.kappa().nb_comp() == 1);
  assert(emissivite().nb_comp() == 1);
  assert(fluide.indice().nb_comp() == 1);
  assert(Tb->nb_comp() == 1);
 
  double bilan_flux = 0.;
  const int ndeb = le_bord.num_premiere_face();
  double kappa_F = -123., epsi = -123.;
  double Tbord = -123., n = -123.;
 
  // On fait une boucle sur les faces
  for (int face = 0; face < nb_faces; face++)
    {
      int elem = face_voisins(face + ndeb, 0);
      if (elem < 0)
        elem = face_voisins(face + ndeb, 1);
 
      if (sub_type(Champ_Uniforme, fluide.kappa()))
        kappa_F = kappa(0, 0);
      else
        kappa_F = kappa(elem, 0);
 
      if (sub_type(Champ_front_uniforme, emissivite()))
        epsi = emissivite().valeurs()(0, 0);
      else
        epsi = emissivite().valeurs()(face, 0);
 
      if (sub_type(Champ_Uniforme, fluide.indice()))
        n = indice(0, 0);
      else
        n = indice(elem, 0);
 
      if (sub_type(Champ_front_uniforme, Tb.valeur()))
        Tbord = Tb->valeurs()(0, 0);
      else
        Tbord = Tb->valeurs()(face, 0);
 
      const double G_F = irradiance(elem);
      const double eF = zvdf.dist_norm_bord(face + ndeb);
 
      double denum = A_ * (2 - epsi);
      denum /= 3 * kappa_F * epsi;
      denum += eF;
 
      const double numer = G_F - 4 * n * n * sigma * pow(Tbord, 4);
      double grad_G = numer / denum;
 
      if (epsi < DMINFLOAT)
        Flux(face, 0) = 0;
      else
        Flux(face, 0) = -grad_G / (3 * kappa_F);
 
      bilan_flux += face_surfaces(face + ndeb) * Flux(face, 0);
    }
 
  Debog::verifier_bord(" Flux_radiatif_VDF::calculer_flux_radiatif_Flux ", Flux, ndeb);
 
  if (eq_rayo.schema_temps().limpr())
    Cout << "Flux radiatif sur le bord " << le_bord.le_nom() << " : " << bilan_flux << finl;
}