Source_Force_Tchen_base.cpp

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#include <Source_Force_Tchen_base.h>
#include <Champ_Face_base.h>
#include <Pb_Multiphase.h>
#include <Matrix_tools.h>
#include <Array_tools.h>
#include <math.h>
 
Implemente_base(Source_Force_Tchen_base, "Source_Force_Tchen_base", Sources_Multiphase_base);
 
Sortie& Source_Force_Tchen_base::printOn(Sortie& os) const { return os; }
 
Entree& Source_Force_Tchen_base::readOn(Entree& is)
{
  // phase identification
  const Pb_Multiphase *pbm = sub_type(Pb_Multiphase, equation().probleme()) ? &ref_cast(Pb_Multiphase, equation().probleme()) : nullptr;
 
  if (!pbm || pbm->nb_phases() == 1) Process::exit(que_suis_je() + " : not needed for single-phase flow!");
  for (int n = 0; n < pbm->nb_phases(); n++) // search for n_l, n_g: {liquid,gas}_continuous phase in priority
    if (pbm->nom_phase(n).debute_par("liquide") && (n_l < 0 || pbm->nom_phase(n).finit_par("continu")))  n_l = n;
 
  if (n_l < 0) Process::exit(que_suis_je() + " : liquid phase not found!");
 
  return is;
}
 
void Source_Force_Tchen_base::dimensionner_blocs(matrices_t matrices, const tabs_t& semi_impl) const
{
  const Champ_Face_base& ch = ref_cast(Champ_Face_base, equation().inconnue());
  if (!matrices.count(ch.le_nom().getString())) return; // nothing to do
 
  Matrice_Morse& mat = *matrices.at(ch.le_nom().getString()), mat2;
  const Domaine_VF& domaine = ref_cast(Domaine_VF, equation().domaine_dis());
  const DoubleTab& inco = ch.valeurs();
  const IntTab& fcl = ch.fcl();
 
  /* stencil: block-diagonal for face velocities, then each component of element velocities */
  Stencil stencil(0, 2);
 
  int N = inco.line_size(), nf = domaine.nb_faces();
 
  /* faces */
  for (int f = 0; f < nf; f++)
    if (fcl(f, 0) < 2)
      for (int k = 0 ; k<N ; k++)
        if (k != n_l) // gas phase
          stencil.append_line( N * f +  k , N * f + n_l) ;
 
  /* elements si aux */
  dimensionner_blocs_aux(stencil);
 
  tableau_trier_retirer_doublons(stencil);
  Matrix_tools::allocate_morse_matrix(inco.size_totale(), inco.size_totale(), stencil, mat2);
  mat.nb_colonnes() ? mat += mat2 : mat = mat2;
}
 
void Source_Force_Tchen_base::ajouter_blocs(matrices_t matrices, DoubleTab& secmem, const tabs_t& semi_impl) const
{
  const Champ_Face_base& ch = ref_cast(Champ_Face_base, equation().inconnue());
  Matrice_Morse *mat = matrices.count(ch.le_nom().getString()) ? matrices.at(ch.le_nom().getString()) : nullptr;
  const Domaine_VF& domaine = ref_cast(Domaine_VF, equation().domaine_dis());
  const IntTab& f_e = domaine.face_voisins(), &fcl = ch.fcl();
  const DoubleVect& pf = equation().milieu().porosite_face(), &vf = domaine.volumes_entrelaces();
  const DoubleTab& inco = ch.valeurs(), &pvit = ch.passe(), &alpha = ref_cast(Pb_Multiphase, equation().probleme()).equation_masse().inconnue().passe(),
                   &rho   = equation().milieu().masse_volumique().passe(), &vf_dir = domaine.volumes_entrelaces_dir();
 
  double pas_tps = equation().probleme().schema_temps().pas_de_temps();
  int N = inco.line_size(), nf = domaine.nb_faces();
 
  /* elements si aux */
  ajouter_blocs_aux(matrices, secmem);
 
  /* faces */
  for (int f = 0; f < nf; f++)
    if (fcl(f, 0) < 2)
      for (int k = 0 ; k<N ; k++)
        if (k != n_l) // gas phase
          {
            double alpha_loc = f_e(f, 1)>=0 ? alpha(f_e(f, 0), k) * vf_dir(f, 0)/vf(f) +  alpha(f_e(f, 1), k) * vf_dir(f, 1)/vf(f) : alpha(f_e(f, 0), k) ;
            double rho_loc   = f_e(f, 1)>=0 ? rho(f_e(f, 0), n_l) * vf_dir(f, 0)/vf(f) + rho(f_e(f, 1), n_l)  * vf_dir(f, 1)/vf(f) : rho(f_e(f, 0), n_l) ;
            double fac = pf(f) * vf(f) * alpha_loc * rho_loc ;
 
            secmem(f, k ) += fac * (inco(f, n_l)-pvit(f, n_l))/pas_tps;
            secmem(f,n_l) -= fac * (inco(f, n_l)-pvit(f, n_l))/pas_tps;
            if (mat)
              {
                (*mat)( N * f +  k , N * f + n_l) -= fac/pas_tps ;
                (*mat)( N * f + n_l, N * f + n_l) += fac/pas_tps ;
              }
          }
}