Sortie_libre_pression_imposee.cpp

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#include <Sortie_libre_pression_imposee.h>
#include <Fluide_Incompressible.h>
#include <Navier_Stokes_std.h>
#include <Champ_Uniforme.h>
#include <Equation_base.h>
 
Implemente_instanciable_sans_constructeur(Sortie_libre_pression_imposee, "Frontiere_ouverte_pression_imposee", Neumann_sortie_libre);
// XD frontiere_ouverte_pression_imposee neumann frontiere_ouverte_pression_imposee INHERITS_BRACE Imposed pressure
// XD_CONT condition at the open boundary called bord (edge). The imposed pressure field is expressed in Pa.
// XD attr ch front_field_base ch REQ Boundary field type.
 
 
Sortie_libre_pression_imposee::Sortie_libre_pression_imposee() : d_rho(-123.) { }
 
Sortie& Sortie_libre_pression_imposee::printOn(Sortie& s) const { return s << que_suis_je() << finl; }
 
Entree& Sortie_libre_pression_imposee::readOn(Entree& s)
{
  if (app_domains.size() == 0) app_domains = { Motcle("Hydraulique"), Motcle("indetermine") };
 
  s >> le_champ_front;
  le_champ_ext.typer("Champ_front_uniforme");
  le_champ_ext->valeurs().resize(1, dimension);
  return s;
}
 
/*! @brief Completes the boundary conditions.
 *
 * Sets the constant density of the physical medium
 *     of the equation to d_rho.
 *
 */
void Sortie_libre_pression_imposee::completer()
{
  const Milieu_base& mil = mon_dom_cl_dis->equation().milieu();
  if (sub_type(Fluide_Incompressible,mil) && mon_dom_cl_dis->equation().que_suis_je() != "QDM_Multiphase")
    {
      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;
 
          // GF: in non-constant rho cases (QC, FT) we must not divide by rho, so d_rho=1
          d_rho = 1;
        }
    }
  else
    d_rho = 1;
}
 
/*! @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 (int i) index along the first dimension of the field
 * @return (double) the value imposed on the specified component of the field
 * @throws second dimension of the boundary field greater than 1
 */
double Sortie_libre_pression_imposee::flux_impose(int i) const
{
  return flux_impose(i,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 (int i) index along the first dimension of the field
 * @param (int j) index along the second dimension of the field
 * @return (double) the value imposed on the specified component of the field
 */
double Sortie_libre_pression_imposee::flux_impose(int i, int j) const
{
  const Milieu_base& mil = mon_dom_cl_dis->equation().milieu();
  double rho_;
  assert(!est_egal(d_rho, -123.));
  if (d_rho == -1)
    {
      const Champ_base& rho = mil.masse_volumique();
      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 if (j < le_champ_front->valeurs().dimension(1))
    return le_champ_front->valeurs()(i, j) / rho_;
  else
    Cerr << "Sortie_libre_pression_imposee::flux_impose error" << finl;
  Process::exit();
  return 0.;
}