Correction_Antal_VDF.cpp

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#include <Correction_Antal_VDF.h>
#include <Champ_Face_VDF.h>
#include <Pb_Multiphase.h>
#include <math.h>
 
Implemente_instanciable(Correction_Antal_VDF, "Correction_Antal_VDF_Face", Source_base);
 
Sortie& Correction_Antal_VDF::printOn(Sortie& os) const
{
  return os;
}
 
Entree& Correction_Antal_VDF::readOn(Entree& is)
{
  Param param(que_suis_je());
  param.ajouter("Cw1", &Cw1_);
  param.ajouter("Cw2", &Cw2_);
  param.lire_avec_accolades_depuis(is);
 
  //identification of phases
  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!");
 
  pbm->creer_champ("distance_paroi_globale"); // Wall distance field required
 
  return is;
}
 
void Correction_Antal_VDF::completer() // We must wait for all readOn's to be sure that the bubble dispersion and lift correlations are created
{
  const Pb_Multiphase& pbm = ref_cast(Pb_Multiphase, equation().probleme());
 
  if (!pbm.has_champ("diametre_bulles")) Process::exit(que_suis_je() + " : a bubble diameter must be defined !");
}
 
 
void Correction_Antal_VDF::dimensionner_blocs(matrices_t matrices, const tabs_t& semi_impl) const
{
}
 
void Correction_Antal_VDF::ajouter_blocs(matrices_t matrices, DoubleTab& secmem, const tabs_t& semi_impl) const
{
  const Champ_Face_VDF& ch = ref_cast(Champ_Face_VDF, equation().inconnue());
  const DoubleTab& pvit = ch.passe(),
                   &alpha = ref_cast(Pb_Multiphase, equation().probleme()).equation_masse().inconnue().passe(),
                    &rho   = equation().milieu().masse_volumique().passe(),
                     &d_bulles = equation().probleme().get_champ("diametre_bulles").valeurs();
  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(),
                     &fs = domaine.face_surfaces();
  const DoubleTab& vf_dir = domaine.volumes_entrelaces_dir(),
                   &n_f = domaine.face_normales(),
                    &y_faces = domaine.y_faces(),
                     &n_y_faces = domaine.normale_paroi_faces();
  int N = pvit.line_size() ,
      D = dimension,
      nf = domaine.nb_faces();
 
  DoubleTrav dv(N, N), pvit_l(N,D), scal_u(N) ;
  int e, f, c, k, d;
 
  double fac, a_l, rho_l, db_l, secmem_l;
 
  DoubleTab pvit_elem(0, N * dimension);
  domaine.domaine().creer_tableau_elements(pvit_elem);
  ch.get_elem_vector_field(pvit_elem, true);
 
  for (f = 0; f < nf; f++)
    if (fcl(f, 0) < 2)
      {
        // Calculation of correct velocity at the face
        pvit_l = 0 ;
        for (d = 0 ; d<D ; d++)
          for (k = 0 ; k<N ; k++)
            for (c=0 ; c<2 && (e = f_e(f, c)) >= 0; c++)
              pvit_l(k, d) += vf_dir(f, c)/vf(f)*pvit_elem(e, N*d+k) ;
        scal_u = 0;
        for (k = 0 ; k<N ; k++)
          for (d = 0 ; d<D ; d++)
            scal_u(k) += pvit_l(k, d)*n_f(f, d)/fs(f);
        for (k = 0 ; k<N ; k++)
          for (d = 0 ; d<D ; d++)
            pvit_l(k, d) += (pvit(f, k) - scal_u(k)) * n_f(f, d)/fs(f) ;
 
        // Retract component normal to the wall
        scal_u = 0;
        for (k = 0 ; k<N ; k++)
          for (d = 0 ; d<D ; d++)
            scal_u(k) += pvit_l(k, d)*n_y_faces(f, d);
        for (k = 0 ; k<N ; k++)
          for (d = 0 ; d<D ; d++)
            pvit_l(k, d) -= scal_u(k)*n_y_faces(f, d) ;
 
        // Calculation of liuqid-gas velocity difference
        dv = 0.;
        for ( k = 0; k < N; k++)
          if (k != n_l)
            {
              for (d = 0 ; d<D ; d++)  dv(k, n_l) += (pvit_l(k, d)-pvit_l(n_l, d)) * (pvit_l(k, d)-pvit_l(n_l, d));
              dv(k, n_l) = std::sqrt(dv(k, n_l));
            }
 
        for (k = 0; k < N; k++)
          if (k != n_l)
            {
              fac = 0 ;
              for (d = 0 ; d<D ; d++) fac += n_y_faces(f, d) * n_f(f, d)/fs(f);
 
              fac *= pf(f) * vf(f) ;
              a_l = (    alpha(f_e(f, 0), k)*vf_dir(f,0) +    ((e = f_e(f, 1))>0 ? alpha(e, k)*vf_dir(f,1) : 0)  ) / vf(f);
              rho_l=(    rho(f_e(f, 0), n_l)*vf_dir(f,0) +    ((e = f_e(f, 1))>0 ? rho(e, n_l)*vf_dir(f,1) : 0)  ) / vf(f);
              db_l= ( d_bulles(f_e(f, 0), k)*vf_dir(f,0) +    ((e = f_e(f, 1))>0 ? d_bulles(e, k)*vf_dir(f,1):0) ) / vf(f);
 
              secmem_l = fac * 2. * a_l * rho_l * dv(k,n_l) * dv(k,n_l) / db_l * std::max(0., Cw1_ + Cw2_*db_l/(2.*y_faces(f))) ;
 
              secmem(f, k)   += secmem_l;
              secmem(f, n_l) -= secmem_l;
            }
 
      }
}