Sortie_libre_pression_moyenne_imposee.cpp

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#include <Sortie_libre_pression_moyenne_imposee.h>
#include <Navier_Stokes_std.h>
#include <Champ_Uniforme.h>
#include <Milieu_base.h>
#include <TRUSTTab.h>
#include <Domaine_VF.h>
 
Implemente_instanciable_sans_constructeur(Sortie_libre_pression_moyenne_imposee, "Frontiere_ouverte_pression_moyenne_imposee", Neumann_sortie_libre);
// XD frontiere_ouverte_pression_moyenne_imposee neumann frontiere_ouverte_pression_moyenne_imposee NO_BRACE Class for
// XD_CONT open boundary with pressure mean level imposed.
// XD attr pext floattant pext REQ Mean pressure.
 
 
Sortie_libre_pression_moyenne_imposee::Sortie_libre_pression_moyenne_imposee() : d_rho(-123.) { }
 
Sortie& Sortie_libre_pression_moyenne_imposee::printOn(Sortie& s) const { return s << que_suis_je() << finl; }
 
Entree& Sortie_libre_pression_moyenne_imposee::readOn(Entree& s)
{
  if (app_domains.size() == 0) app_domains = { Motcle("Hydraulique"), Motcle("indetermine") };
 
  s >> Pext_;
  le_champ_ext.typer("Champ_front_uniforme");
  le_champ_ext->valeurs().resize(1, dimension);
  le_champ_front.typer("Champ_front_fonc");
  le_champ_front->fixer_nb_comp(1);
  return s;
}
 
void Sortie_libre_pression_moyenne_imposee::completer()
{
  const Milieu_base& mil = mon_dom_cl_dis->equation().milieu();
  if (sub_type(Champ_Uniforme, mil.masse_volumique()))
    {
      const Champ_Uniforme& rho = ref_cast(Champ_Uniforme, mil.masse_volumique());
      d_rho = rho.valeurs()(0, 0);
    }
  else
    d_rho = -1;
 
  int i;
  ndeb_ = ref_cast(Front_VF,frontiere_dis()).num_premiere_face();
  nb_faces_ = ref_cast(Front_VF,frontiere_dis()).nb_faces();
  le_champ_front->valeurs().resize(nb_faces_, 1);
  DoubleTab& Pimp = le_champ_front->valeurs();
  for (i = 0; i < nb_faces_; i++)
    Pimp(i, 0) = Pext_;
 
  surfaces.resize(nb_faces_);
 
  Domaine_VF& zvf = ref_cast(Domaine_VF, mon_dom_cl_dis->domaine_dis());
  for (i = 0; i < nb_faces_; i++)
    {
      surfaces(i) = zvf.face_surfaces(i + ndeb_);
    }
 
  face_voisins = zvf.face_voisins();
}
 
/*! @brief Updates the boundary conditions.
 *
 * @param temps current time
 */
void Sortie_libre_pression_moyenne_imposee::mettre_a_jour(double temps)
{
  Cond_lim_base::mettre_a_jour(temps);
  const DoubleTab& tab_P = ref_cast(Navier_Stokes_std,mon_dom_cl_dis->equation()).pression().valeurs();
 
  int face, elem, facegl;
  DoubleTab& Pimp = le_champ_front->valeurs();
 
  double Ptot = 0, s, S = 0;
 
  for (face = 0; face < nb_faces_; face++)
    {
      facegl = face + ndeb_;
      elem = face_voisins(facegl, 0);
      if (elem == -1)
        elem = face_voisins(facegl, 1);
      s = surfaces(face);
      S += s;
      Ptot += s * tab_P(elem);
    }
  // Optimization: combine 2 mp_sum into 1 collective call
  mp_sum_for_each(Ptot, S);
  Ptot /= S;
 
  Cerr << "Sortie_libre_pression_moyenne_imposee  pmoy= " << Ptot << finl;
 
  for (face = 0; face < nb_faces_; face++)
    {
      facegl = face + ndeb_;
      elem = face_voisins(facegl, 0);
      if (elem == -1)
        elem = face_voisins(facegl, 1);
      Pimp(face, 0) = tab_P(elem) + (Pext_ - Ptot);
    }
}
 
/*! @brief Returns the value of the imposed flux on the i-th component of the field representing the flux at the boundary.
 *
 *     The boundary field is considered constant over all elements of the boundary.
 *     The imposed flux value at the boundary equals the value of the (constant) boundary field divided by d_rho.
 *
 * @param i index along the first dimension of the field
 * @return the value imposed on the specified component of the field
 * @throws second dimension of the boundary field greater than 1
 */
double Sortie_libre_pression_moyenne_imposee::flux_impose(int i) const
{
  const Milieu_base& mil = mon_dom_cl_dis->equation().milieu();
  const Champ_base& rho = mil.masse_volumique();
  double rho_;
  assert(!est_egal(d_rho, -123.));
  if (d_rho == -1)
    rho_ = rho.valeurs()(i);
  else
    rho_ = d_rho;
 
  if (le_champ_front->valeurs().size() == 1)
    return le_champ_front->valeurs()(0, 0) / rho_;
  else if (le_champ_front->valeurs().dimension(1) == 1)
    return le_champ_front->valeurs()(i, 0) / rho_;
  else
    Cerr << "Neumann::flux_impose error" << finl;
  exit();
  return 0.;
}
 
/*! @brief Returns the value of the imposed flux on the (i,j)-th component of the field representing the flux at the boundary.
 *
 *     The boundary field is NOT constant over all elements of the boundary.
 *
 * @param i index along the first dimension of the field
 * @param j index along the second dimension of the field
 * @return the value imposed on the specified component of the field
 */
double Sortie_libre_pression_moyenne_imposee::flux_impose(int i, int j) const
{
  const Milieu_base& mil = mon_dom_cl_dis->equation().milieu();
  const Champ_base& rho = mil.masse_volumique();
  double rho_;
  assert(!est_egal(d_rho, -123.));
  if (d_rho == -1)
    rho_ = rho.valeurs()(i);
  else
    rho_ = d_rho;
 
  if (le_champ_front->valeurs().dimension(0) == 1)
    return le_champ_front->valeurs()(0, j) / rho_;
  else
    return le_champ_front->valeurs()(i, j) / rho_;
}