Source_Travail_pression_Elem_base.cpp

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#include <Source_Travail_pression_Elem_base.h>
#include <Champ_Inc_P0_base.h>
#include <Champ_Face_base.h>
#include <Pb_Multiphase.h>
#include <Matrix_tools.h>
#include <Array_tools.h>
#include <Domaine_VF.h>
#include <cfloat>
 
Implemente_base(Source_Travail_pression_Elem_base, "Source_Travail_pression_Elem_base", Sources_Multiphase_base);
// XD travail_pression source_base travail_pression NO_BRACE Source term which corresponds to the additional pressure
// XD_CONT work term that appears when dealing with compressible multiphase fluids
 
Sortie& Source_Travail_pression_Elem_base::printOn(Sortie& os) const { return os; }
Entree& Source_Travail_pression_Elem_base::readOn(Entree& is) { return is; }
 
void Source_Travail_pression_Elem_base::dimensionner_blocs(matrices_t matrices, const tabs_t& semi_impl) const
{
  const Domaine_VF& domaine = ref_cast(Domaine_VF, equation().domaine_dis());
  const IntTab& e_f = domaine.elem_faces(), &f_e = domaine.face_voisins();
  const DoubleTab& inco = equation().inconnue().valeurs();
  int i, j, e, eb, ne = domaine.nb_elem(), f,n, N = inco.line_size(), m,
                   M = ref_cast(QDM_Multiphase, ref_cast(Pb_Multiphase, equation().probleme()).equation_qdm()).pression().valeurs().line_size();
 
  for (auto &&n_m : matrices)
    if (n_m.first == "pression" || (n_m.first == "alpha" && !semi_impl.count("alpha")) || n_m.first == "vitesse")
      {
        Matrice_Morse& mat = *n_m.second, mat2;
        Stencil sten(0, 2);
 
        if (n_m.first == "pression") /* pression : dependance locale, implicite */
          for (e = 0; e < ne; e++)
            for (n = 0, m = 0; n < N; n++, m += (M > 1)) sten.append_line(N * e + n, M * e + m);
        else if (n_m.first == "vitesse")
          for (e = 0; e < ne; e++)
            for (i = 0; i < e_f.dimension(1); i++)
              {
                if ((f = e_f(e, i)) >= 0)
                  for (n = 0; n < N; n++) sten.append_line(N * e + n, N * f + n);
              }
        else for (e = 0; e < ne; e++)
            for (i = 0; i < e_f.dimension(1); i++)
              if ((f = e_f(e, i)) >= 0)
                for (j = 0; j < 2 && (eb = f_e(f, j)) >= 0; j++)
                  for (n = 0; n < N; n++) sten.append_line(N * e + n, N * eb + n);
        tableau_trier_retirer_doublons(sten);
        Matrix_tools::allocate_morse_matrix(inco.size_totale(), equation().probleme().get_champ(n_m.first).valeurs().size_totale(), sten, mat2);
        mat.nb_colonnes() ? mat += mat2 : mat = mat2;
      }
}
 
void Source_Travail_pression_Elem_base::ajouter_blocs(matrices_t matrices, DoubleTab& secmem, const tabs_t& semi_impl) const
{
  const Pb_Multiphase& pbm = ref_cast(Pb_Multiphase, equation().probleme());
  const Domaine_VF& domaine = ref_cast(Domaine_VF, equation().domaine_dis());
  const DoubleVect& pe = equation().milieu().porosite_elem(), &pf = equation().milieu().porosite_face(),
                    &fs = domaine.face_surfaces(), &ve = domaine.volumes();
 
  const Champ_Inc_base& ch_a = pbm.equation_masse().inconnue(),
                        &ch_v = pbm.equation_qdm().inconnue(),
                         &ch_p = ref_cast(QDM_Multiphase, pbm.equation_qdm()).pression();
 
  /* three alpha arrays: current / past and convected field (may be semi-implicit) */
  const DoubleTab& alpha = ch_a.valeurs(), &c_alpha = semi_impl.count("alpha") ? semi_impl.at("alpha") : alpha,
                   &p_alpha = ch_a.passe(), &press = ch_p.valeurs(), &vit = ch_v.valeurs();
 
  const IntTab& fcl = ref_cast(Champ_Inc_P0_base, ch_a).fcl(), &f_e = domaine.face_voisins(),
                &fcl_v = ref_cast(Champ_Face_base, ch_v).fcl();
 
  DoubleTab b_alpha = ch_a.valeur_aux_bords();
  Matrice_Morse *Mp = matrices.count("pression") ? matrices.at("pression") : nullptr,
                 *Ma = matrices.count("alpha") && !semi_impl.count("alpha") ? matrices.at("alpha") : nullptr,
                  *Mv = matrices.count("vitesse") ? matrices.at("vitesse") : nullptr;
 
  int i, j, e, eb, f, n, N = alpha.line_size(), m, M = press.line_size();
  double dt = equation().schema_temps().pas_de_temps();
 
  // term -p d alpha_k / dt and its derivatives
  for (e = 0; e < domaine.nb_elem(); e++)
    {
      for (n = 0, m = 0; n < N; n++, m += (M > 1))
        secmem(e, n) -= pe(e) * ve(e) * press(e, m) * (alpha(e, n) - p_alpha(e, n)) / dt;
      if (Mp)
        for (n = 0, m = 0; n < N; n++, m += (M > 1))
          (*Mp)(N * e + n, M * e + m) += pe(e) * ve(e) * (alpha(e, n) - p_alpha(e, n)) / dt;
      if (Ma)
        for (n = 0, m = 0; n < N; n++, m += (M > 1))
          (*Ma)(N * e + n, N * e + n) += pe(e) * ve(e) * press(e, m) / dt;
    }
 
  // term -p div (alpha_k v_k)
  DoubleTrav dv_flux(N), dc_flux(2, N); // derivatives of the face convective flux w.r.t. velocity / upwind or downwind convected field
  /* convection at internal faces (fcl(f, 0) == 0), Neumann_val_ext or Dirichlet */
  for (f = 0; f < domaine.nb_faces(); f++)
    if (!fcl(f, 0) || (fcl(f, 0) > 4 && fcl(f, 0) < 7))
      {
        for (dv_flux = 0, dc_flux = 0, i = 0; i < 2; i++)
          for (e = f_e(f, i), n = 0; n < N; n++)
            {
              const double v = vit(f, n) ? vit(f, n) : DBL_MIN,
                           fac = pf(f) * fs(f) * (1. + (v * (i ? -1 : 1) > 0 ? 1. : -1) * alp) / 2;
 
              dv_flux(n) += fac * (e >= 0 ? c_alpha(e, n) - pbm.alpha_inf_phase(n) : b_alpha(f, n) - pbm.alpha_inf_phase(n)); //f is a real face -> trivial index in b_alpha
              dc_flux(i, n) = e >= 0 ? fac * vit(f, n) : 0;
            }
 
        // right-hand side
        for (i = 0; i < 2; i++)
          if ((e = f_e(f, i)) >= 0)
            if (e < domaine.nb_elem())
              for (n = 0, m = 0; n < N; n++, m += (M > 1))
                secmem(e, n) -= (i ? -1 : 1) * press(e, m) * dv_flux(n) * vit(f, n);
        // derivatives: velocity
        if (Mv && (fcl_v(f, 0) < 2 || fcl_v(f, 0) == 5)) // XXX : not for Dirichlet BC!
          for (i = 0; i < 2; i++)
            if ((e = f_e(f, i)) >= 0)
              if (e < domaine.nb_elem())
                for (n = 0, m = 0; n < N; n++, m += (M > 1))
                  (*Mv)(N * e + n, N * f + n) += (i ? -1 : 1) * press(e, m) * dv_flux(n);
        // derivatives: pressure
        if (Mp)
          for (i = 0; i < 2; i++)
            if ((e = f_e(f, i)) >= 0)
              if (e < domaine.nb_elem())
                for (n = 0, m = 0; n < N; n++, m += (M > 1))
                  (*Mp)(N * e + n, M * e + m) += (i ? -1 : 1) * dv_flux(n) * vit(f, n);
        // derivatives: alpha
        if (Ma)
          for (i = 0; i < 2; i++)
            if ((e = f_e(f, i)) >= 0)
              if (e < domaine.nb_elem())
                for (j = 0; j < 2; j++)
                  if ((eb = f_e(f, j)) >= 0)
                    for (n = 0, m = 0; n < N; n++, m += (M > 1))
                      (*Ma)(N * e + n, N * eb + n) += (i ? -1 : 1) * press(e, m) * dc_flux(j, n);
      }
}