Source_Dissipation_energie_cin_turb.cpp

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#include <Source_Dissipation_energie_cin_turb.h>
 
#include <Dissipation_type_helpers.h>
#include <Viscosite_turbulente_base.h>
#include <Pb_Multiphase.h>
 
Implemente_base(Source_Dissipation_energie_cin_turb,"Source_Dissipation_energie_cin_turb", Sources_Multiphase_base);
// XD Terme_dissipation_energie_cinetique_turbulente source_base Terme_dissipation_energie_cinetique_turbulente BRACE
// XD_CONT Dissipation source term used in the TKE equation
// XD attr beta_k floattant beta_k OPT Constant for the used model
 
// XD Production_echelle_temp_taux_diss_turb source_base Production_echelle_temp_taux_diss_turb INHERITS_BRACE
// XD_CONT Production source term used in the tau and omega equations
// XD attr alpha_omega floattant alpha_omega OPT Constant for the used model
 
// XD Dissipation_echelle_temp_taux_diss_turb source_base Dissipation_echelle_temp_taux_diss_turb INHERITS_BRACE
// XD_CONT Dissipation source term used in the tau and omega equations
// XD attr beta_omega floattant beta_omega OPT Constant for the used model
 
// XD Diffusion_croisee_echelle_temp_taux_diss_turb source_base Diffusion_croisee_echelle_temp_taux_diss_turb INHERITS_BRACE Cross-diffusion source term used in the tau and omega equations
// XD attr sigma_d floattant sigma_d OPT Constant for the used model
 
 
Sortie& Source_Dissipation_energie_cin_turb::printOn(Sortie& os) const
{
  return os;
}
 
Entree& Source_Dissipation_energie_cin_turb::readOn(Entree& is)
{
  Param param(que_suis_je());
  param.ajouter("beta_k", &beta_k_);
  param.lire_avec_accolades_depuis(is);
  return is;
}
 
void Source_Dissipation_energie_cin_turb::completer()
{
  const Navier_Stokes_std& eq_qdm = ref_cast(Navier_Stokes_std, equation().probleme().equation(0));
  if (ref_cast(Operateur_Diff_base, eq_qdm.operateur(0).l_op_base()).correlation_viscosite_turbulente() == nullptr)
    Process::exit(que_suis_je() + " : the momentum diffusion must be turbulent !");
}
 
void Source_Dissipation_energie_cin_turb::dimensionner_blocs(matrices_t matrices, const tabs_t& semi_impl) const
{
  const Domaine_VF& domaine = ref_cast(Domaine_VF, equation().domaine_dis());
  const DoubleTab& k = equation().inconnue().valeurs();
  const int ne = domaine.nb_elem(), ne_tot = domaine.nb_elem_tot(), Nk = k.line_size();
 
  const std::string Type_diss = find_dissipation_type(equation().probleme());
 
  assert(Nk == 1);
  assert(equation().probleme().get_champ(Type_diss.c_str()).valeurs().line_size() == 1);
 
  dimensionner_blocs_diagonal(matrices, equation().probleme(), ne, ne_tot, Nk,
  {"alpha", "tau", "omega", "temperature"}, /* handle_pression */ true);
}
 
void Source_Dissipation_energie_cin_turb::ajouter_blocs(matrices_t matrices, DoubleTab& secmem,
                                                        const tabs_t& semi_impl) const
{
  const Domaine_VF& domaine = ref_cast(Domaine_VF, equation().domaine_dis());
  const DoubleTab& k = equation().inconnue().valeurs();
  const Champ_Inc_base& ch_alpha_rho_k = equation().champ_conserve();
  const DoubleTab& alpha_rho_k = ch_alpha_rho_k.passe();
  const tabs_t& der_alpha_rho_k = ref_cast(Champ_Inc_base, ch_alpha_rho_k).derivees();
  const Navier_Stokes_std& eq_qdm = ref_cast(Navier_Stokes_std, equation().probleme().equation(0));
  const Viscosite_turbulente_base& visc_turb = ref_cast(Viscosite_turbulente_base,
                                                        (*ref_cast(Operateur_Diff_base, eq_qdm.operateur(0).l_op_base()).correlation_viscosite_turbulente()));
  const DoubleTab& nu = equation().probleme().get_champ("viscosite_cinematique").passe();
  const DoubleVect& pe = equation().milieu().porosite_elem(), &ve = domaine.volumes();
  const int cnu = nu.dimension(0) == 1;
 
  const std::string Type_diss = find_dissipation_type(equation().probleme());
 
  const DoubleTab& diss = equation().probleme().get_champ(Nom(Type_diss.c_str())).passe();
 
  Matrice_Morse *Ma = matrices.count("alpha") ? matrices.at("alpha") : nullptr;
  Matrice_Morse *Mk = matrices.count("k") ? matrices.at("k") : nullptr;
  Matrice_Morse *Mdiss = matrices.count(Type_diss) ? matrices.at(Type_diss) : nullptr;
  Matrice_Morse *Mp = matrices.count("pression") ? matrices.at("pression") : nullptr;
  Matrice_Morse *Mt = matrices.count("temperature") ? matrices.at("temperature") : nullptr;
 
  const int Nk = k.line_size();
  const int Np = equation().probleme().get_champ("pression").valeurs().line_size();
  const int Na = sub_type(Pb_Multiphase, equation().probleme())
                 ? ref_cast(Pb_Multiphase, equation().probleme()).get_champ("alpha").valeurs().line_size() : 1;
  const int Nt = Mt ? equation().probleme().get_champ("temperature").valeurs().line_size() : 1;
  const int nb_elem = domaine.nb_elem();
 
  // Helper to get derivative of (alpha * rho * k) with respect to a given variable
  auto get_deriv = [&](const std::string& var, int e, int n) -> double
  {
    return der_alpha_rho_k.count(var) ? der_alpha_rho_k.at(var)(e, n) : 0.;
  };
 
  for (int e = 0; e < nb_elem; e++)
    for (int mk = 0, mp = 0; mk < Nk; mk++, mp += (Np > 1))
      {
        const double peve = pe(e) * ve(e);
 
        if (Type_diss == "tau")
          {
            const double lim = visc_turb.limiteur() * nu(!cnu * e, mk);
            const bool limited = !(k(e, mk) * diss(e, mk) > lim);
            const double inv_tau = limited ? k(e, mk) / lim : 1. / diss(e, mk);
 
            secmem(e, mk) -= peve * beta_k_ * alpha_rho_k(e, mk) * inv_tau;
 
            if (Ma)
              (*Ma)(Nk * e + mk, Na * e + mk) += peve * beta_k_ * get_deriv("alpha", e, mk) * inv_tau;
 
            if (Mt)
              (*Mt)(Nk * e + mk, Nt * e + mk) += peve * beta_k_ * get_deriv("temperature", e, mk) * inv_tau;
 
            if (Mp)
              (*Mp)(Nk * e + mk, Np * e + mp) += peve * beta_k_ * get_deriv("pression", e, mp) * inv_tau;
 
            if (Mk)
              {
                if (limited)
                  (*Mk)(Nk * e + mk, Nk * e + mk) += peve * 2 * beta_k_ * alpha_rho_k(e, mk) / lim;
                else
                  (*Mk)(Nk * e + mk, Nk * e + mk) += peve * beta_k_ * get_deriv("k", e, mk) * inv_tau;
              }
 
            if (Mdiss)
              {
                if (!limited)
                  (*Mdiss)(Nk * e + mk, Nk * e + mk) -= peve * beta_k_ * alpha_rho_k(e, mk) / (diss(e, mk) * diss(e, mk));
                // When limited, dissipation (tau) does not appear in the expression => derivative is 0
              }
          }
        else if (Type_diss == "omega")
          {
            // Source: -beta_k * k * omega
            secmem(e, mk) -= peve * beta_k_ * k(e, mk) * diss(e, mk);
 
            // Jacobian w.r.t. k: d/dk(-beta_k * k * omega) = -beta_k * omega
            if (Mk)
              (*Mk)(Nk * e + mk, Nk * e + mk) += peve * beta_k_ * diss(e, mk);
          }
      }
}