Schema_Adams_Moulton_order_2.cpp

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/*! @brief class Schema_Adams_Moulton_order_2
 *
 */
 
#include <Schema_Adams_Moulton_order_2.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>
#include <string>
 
Implemente_instanciable(Schema_Adams_Moulton_order_2,"Schema_Adams_Moulton_order_2",Schema_Adams_Moulton_base);
// XD schema_adams_moulton_order_2 schema_implicite_base schema_adams_moulton_order_2 INHERITS_BRACE not_set
// XD attr facsec_max floattant facsec_max OPT Maximum ratio allowed between time step and stability time returned by
// XD_CONT CFL condition. The initial ratio given by facsec keyword is changed during the calculation with the implicit
// XD_CONT scheme but it couldn\'t be higher than facsec_max value.NL2 Warning: Some implicit schemes do not permit high
// XD_CONT facsec_max, example Schema_Adams_Moulton_order_3 needs facsec=facsec_max=1. NL2 Advice:NL2 The calculation
// XD_CONT may start with a facsec specified by the user and increased by the algorithm up to the facsec_max limit. But
// XD_CONT the user can also choose to specify a constant facsec (facsec_max will be set to facsec value then). Faster
// XD_CONT convergence has been seen and depends on the kind of calculation: NL2-Hydraulic only or thermal hydraulic
// XD_CONT with forced convection and low coupling between velocity and temperature (Boussinesq value beta low), facsec
// XD_CONT between 20-30NL2-Thermal hydraulic with forced convection and strong coupling between velocity and
// XD_CONT temperature (Boussinesq value beta high), facsec between 90-100 NL2-Thermohydralic with natural convection,
// XD_CONT facsec around 300NL2 -Conduction only, facsec can be set to a very high value (1e8) as if the scheme was
// XD_CONT unconditionally stableNL2These values can also be used as rule of thumb for initial facsec with a facsec_max
// XD_CONT limit higher.
 
 
Sortie& Schema_Adams_Moulton_order_2::printOn(Sortie& s) const
{
  return  Schema_Adams_Moulton_base::printOn(s);
}
 
Entree& Schema_Adams_Moulton_order_2::readOn(Entree& s)
{
  return Schema_Adams_Moulton_base::readOn(s);
}
 
/*! @brief Renvoie le nombre de valeurs temporelles a conserver.
 *
 */
int Schema_Adams_Moulton_order_2::nb_valeurs_temporelles() const
{
  return 3 ;
}
 
int Schema_Adams_Moulton_order_2::nb_valeurs_passees() const
{
  return 0;
}
 
int Schema_Adams_Moulton_order_2::nb_pas_dt_seuil() const
{
  return 0;
}
 
void Schema_Adams_Moulton_order_2::compute_adams_moulton_coefficients(double time_step, const DoubleTab& times) const
{
  assert(times.size_array() == 2); //past, present and future times, stored in ascending order inside "times" table
 
  if ( adams_moulton_coefficients_.size_array() != 2)
    {
      adams_moulton_coefficients_.resize(2,RESIZE_OPTIONS::NOCOPY_NOINIT);
    }
 
  adams_moulton_coefficients_[0] = 0.5;
  adams_moulton_coefficients_[1] = 0.5;
}