SolveurPP1B.cpp

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#include <SolveurPP1B.h>
#include <Champ_P1_isoP1Bulle.h>
#include <Solv_AMG.h>
#include <Perf_counters.h>
 
Implemente_instanciable(SolveurPP1B,"SolveurPP1B",SolveurSys_base);
 
// printOn
Sortie& SolveurPP1B::printOn(Sortie& s ) const
{
  return s  << que_suis_je();
}
 
 
// readOn
Entree& SolveurPP1B::readOn(Entree& is )
{
  return is;
}
 
static int nw=0;
int SolveurPP1B::resoudre_systeme(const Matrice_Base& A,
                                  const DoubleVect& second_membre,
                                  DoubleVect& x)
{
  // Stop the solv_sys_counter_ counter to not count the changing base
  statistics().end_count(STD_COUNTERS::system_solver,-1,0);
  b_ = second_membre;
  assembleur_pression_->changer_base_second_membre(b_);
  assembleur_pression_->changer_base_pression(x);
  int nb_iter=solveur_pression_.resoudre_systeme(A,b_,x);
  // Advice to use AMG solver based on PCFieldsplit from PETSc
  if (!sub_type(Solv_AMG, solveur_pression_.valeur()))
    {
      nw++;
      if (nw<100 && x.size_array()*Process::nproc()>100000)
        {
          Cerr << finl;
          Cerr << "************** Advice (printed only on the first 100 time steps) **************" << finl;
          Cerr << "You should use AMG (Algebric Multigrid) solver for your pressure solver problem" << finl;
          Cerr << "which benefits from the block P0P1 structure of the pressure matrix." << finl;
          Cerr << "Something like: solveur_pression AMG GCP { atol|rtol XXX impr } " << finl;
          Cerr << "For the caracteristics of your problem, it will have much faster convergence !" << finl;
          Cerr << "*******************************************************************************" << finl << finl;
        }
    }
  assembleur_pression_->changer_base_pression_inverse(x);
  statistics().begin_count(STD_COUNTERS::system_solver,statistics().get_last_opened_counter_level()+1);
  return nb_iter;
}
 
 
 
int SolveurPP1B::resoudre_systeme(const Matrice_Base& A,
                                  const DoubleVect& b,
                                  DoubleVect& x,
 
                                  int niter_max)
{
  return SolveurPP1B::resoudre_systeme(A,b,x);
}
 
 
// Assignment of the pressure assembler and solver
int SolveurPP1B::associer(const Assembleur_P_VEFPreP1B& assembleur_pression, const SolveurSys& solveur_pression)
{
  assembleur_pression_=assembleur_pression;
  solveur_pression_=solveur_pression;
  fixer_limpr(-1); // No printing
  return 0;
}