Source_Meca_Grad_Pression_Thermique_EF.cpp

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#include <Source_Meca_Grad_Pression_Thermique_EF.h>
#include <Milieu_Elasticite.h>
#include <Domaine_EF.h>
#include <Equation_base.h>
#include <Champ_Uniforme.h>
#include <Param.h>
 
Implemente_instanciable(Source_Meca_Grad_Pression_Thermique_EF, "Source_Meca_Grad_Pression_Thermique_EF", Source_base);
// XD source_meca_grad_pression_thermique source_base source_meca_grad_pression_thermique BRACE Source term that applies
// XD_CONT the gradient of thermal pressure as an equivalent body force in the linear elasticity momentum equation.
 
Sortie& Source_Meca_Grad_Pression_Thermique_EF::printOn(Sortie& os) const { return Source_base::printOn(os); }
 
Entree& Source_Meca_Grad_Pression_Thermique_EF::readOn(Entree& is)
{
  Param param(que_suis_je());
  param.ajouter("reference_temperature_field", &T_ref_, Param::REQUIRED); // XD_ADD_P field_base
  // XD_CONT Reference temperature field used to compute the thermal pressure gradient.
  param.ajouter("temperature_field", &T_, Param::REQUIRED); // XD_ADD_P field_base
  // XD_CONT Temperature field used to compute the thermal pressure gradient.
  param.lire_avec_accolades_depuis(is);
  return is;
}
 
int Source_Meca_Grad_Pression_Thermique_EF::initialiser(double temps)
{
  T_ref_->initialiser(temps);
  equation().discretisation().nommer_completer_champ_physique(equation().domaine_dis(), "temperature_field", "", T_.valeur(), equation().probleme());
  T_->initialiser(temps);
  return Source_base::initialiser(temps);
}
 
void Source_Meca_Grad_Pression_Thermique_EF::mettre_a_jour(double temps)
{
  T_ref_->mettre_a_jour(temps);
  T_->mettre_a_jour(temps);
}
 
DoubleTab& Source_Meca_Grad_Pression_Thermique_EF::ajouter(DoubleTab& resu) const
{
  const Domaine_EF& domaine_ef = ref_cast(Domaine_EF, equation().domaine_dis());
  const IntTab& elems = domaine_ef.domaine().les_elems();
  const DoubleTab& Bij_thilde = domaine_ef.Bij_thilde();
  const DoubleTab& IPhi_thilde = domaine_ef.IPhi_thilde();
 
  const int nb_elem_tot = domaine_ef.nb_elem_tot();
  const int nb_som_elem = domaine_ef.domaine().nb_som_elem();
  const int D = dimension;
 
  const DoubleTab& val_alpha = ref_cast(Milieu_Elasticite, equation().milieu()).thermal_expansion().valeurs();
  const DoubleTab& val_K     = ref_cast(Milieu_Elasticite, equation().milieu()).bulk_modulus().valeurs();
 
  const DoubleTab& val_T     = T_->valeurs();
  const DoubleTab& val_Tref  = T_ref_->valeurs();
 
  const int cT = sub_type(Champ_Uniforme, T_.valeur()) ? 1 : 0;
  const int cTref = sub_type(Champ_Uniforme, T_ref_.valeur()) ? 1 : 0;
 
  // Assemble: for each element e, scalar s_e = 3 K α (T - Tref),
  // add to each node i and component d: resu(node,d) += s_e * ∫_Ω ∂N_i/∂x_d dV = s_e * Bij_thilde(e,i,d)
  for (int e = 0; e < nb_elem_tot; e++)
    {
      const double alpha_e = val_alpha(0);
      const double K_e     = val_K(0);
      const double dT_e    = val_T(e * !cT) - val_Tref(e * !cTref);
      const double s_e     = 3.0 * K_e * alpha_e * dT_e; // [Pa]
 
      if (s_e == 0.) continue;
 
      for (int i = 0; i < nb_som_elem; i++)
        {
          const int s = elems(e, i);
          // Base strong-form (all components): + s_e * ∫ ∂N_i/∂x_d dV
          for (int d = 0; d < D; d++)
            resu(s, d) += s_e * Bij_thilde(e, i, d);
 
          // Axisymmetric fix: add + s_e * ∫ (N_i / r) dV on the radial component
          if (bidim_axi)
            resu(s, 0) += s_e * IPhi_thilde(e, i) / domaine_ef.xp(e, 0);
        }
    }
  return resu;
}