Schema_Adams_Moulton_base.cpp

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/*! @brief class Schema_Adams_Moulton_base
 *
 */
 
#include <Schema_Adams_Moulton_base.h>
#include <Equation_base.h>
#include <Probleme_base.h>
#include <Probleme_Couple.h>
#include <Milieu_base.h>
#include <Param.h>
#include <communications.h>
#include <Matrice_Morse.h>
 
Implemente_base(Schema_Adams_Moulton_base,"Schema_Adams_Moulton_base",Schema_Implicite_Multi_TimeStep_base);
 
 
//     printOn()
/////
 
Sortie& Schema_Adams_Moulton_base::printOn(Sortie& s) const
{
  return  Schema_Implicite_base::printOn(s);
}
 
//// readOn
//
 
Entree& Schema_Adams_Moulton_base::readOn(Entree& s)
{
  return Schema_Implicite_Multi_TimeStep_base::readOn(s);
}
 
void Schema_Adams_Moulton_base::associer_pb(const Probleme_base& un_probleme)
{
  Schema_Implicite_Multi_TimeStep_base::associer_pb(un_probleme);
  // Loop on equations
  for (int i=0; i<pb_base().nombre_d_equations(); i++)
    pb_base().equation(i).set_calculate_time_derivative(1);
}
 
double Schema_Adams_Moulton_base::changer_temps(Equation_base& eqn, const double temps)
{
  eqn.inconnue().Champ_base::changer_temps(temps);
  eqn.derivee_en_temps().Champ_base::changer_temps(temps);
  return temps;
}
 
void Schema_Adams_Moulton_base::update_time_derivative(Equation_base& eqn, const DoubleTab& data)
{
  DoubleTab& time_derivative = eqn.derivee_en_temps().futur();
  time_derivative = data;                                //here "data" is supposed to contain "vpoint" table
  modifier_second_membre_full_impl(eqn,time_derivative);
}
 
void Schema_Adams_Moulton_base::mettre_a_jour_equation(Equation_base& eqn, const double temps)
{
  eqn.inconnue().mettre_a_jour(temps);
  eqn.derivee_en_temps().mettre_a_jour(temps);
}
 
void Schema_Adams_Moulton_base::compute_coefficients(double time_step, const DoubleTab& times) const
{
  compute_adams_moulton_coefficients(time_step,times);
}
 
void Schema_Adams_Moulton_base::add_multi_timestep_data(const Equation_base& eqn, Matrice_Base& mat_morse, DoubleTab& secmem) const
{
  Equation_base& eqn_bis         = ref_cast_non_const(Equation_base,eqn);
  double time_step               = pas_de_temps();
  double effective_time_step     = -1.;
  double scaling                 = -1.;
 
  // Remark for "pen" interger : we do not penalize matrices and right members even in the case
  // of Dirichlet or Symetrie boundary conditions
  int pen    = 0;
  int offset = 0;
  int i      = 0;
 
  effective_time_step     = coefficients()[nb_valeurs_passees()+1] * time_step;
  scaling                 = 1./coefficients()[nb_valeurs_passees()+1];
 
  //Modification due to pressure gradient
  DoubleTab correction(eqn.inconnue().valeurs());
 
  correction = 0.;
  eqn_bis.corriger_derivee_expl(correction);
  correction *= (scaling-1.);
  secmem     += correction;
 
  //Modification due to present time and past times
  DoubleTab dudt(eqn.inconnue().passe(1)); //due to Initialiser_Champs() offset
  DoubleTab tmp(dudt);
 
  for (i=0; i<nb_valeurs_passees()+1; ++i)
    {
      offset  = nb_valeurs_passees()-i; //present time if offset==0 else past times
      tmp     = eqn.derivee_en_temps().passe(offset);
      tmp    *= coefficients()[i] * time_step;
      dudt   += tmp;
    }
 
  eqn.solv_masse().ajouter_masse(effective_time_step,secmem,dudt,pen);
  eqn.solv_masse().ajouter_masse(effective_time_step,mat_morse,pen);
}
 
//To get du/dt table without pressure gradient and influences of past and present times
void Schema_Adams_Moulton_base::modifier_second_membre_full_impl(const Equation_base& eqn, DoubleTab& secmem)
{
  Equation_base& eqn_bis = ref_cast_non_const(Equation_base,eqn);
 
  DoubleTab correction(secmem);
  correction=0.;
  eqn_bis.corriger_derivee_expl(correction);
  eqn.solv_masse().appliquer(correction);
  secmem-=correction; //on enleve le gradient de pression
 
  if (nb_pas_dt()>nb_pas_dt_seuil())
    {
      int i = 0;
      int offset = 0;
      double scaling = 1./coefficients()[nb_valeurs_passees()+1];
 
      for (i=0; i<nb_valeurs_passees()+1; ++i )
        {
          offset      = nb_valeurs_passees() - i;
          correction  = eqn.derivee_en_temps().passe(offset);//present time if i==nb_valeurs_passees() else past times
          correction *= coefficients()[i];
          secmem     -= correction;
        }
 
      secmem *= scaling;
    }
}
 
//To take into account pressure constraint
void Schema_Adams_Moulton_base::store_equation_parameters(Equation_base& eqn, DoubleTab& stored_parameters)
{
  //Nothing to do
}
 
//To take into account pressure constraint
void Schema_Adams_Moulton_base::modify_equation_parameters(Equation_base& eqn, DoubleTab& stored_parameters)
{
  //Nothing to do
}