oomph::Hypre_default_settings Namespace Reference

Default settings for various uses of the HYPRE solver. More...

Functions
void	set_defaults_for_2D_poisson_problem (HyprePreconditioner *hypre_preconditioner_pt)
void	set_defaults_for_3D_poisson_problem (HyprePreconditioner *hypre_preconditioner_pt)
void	set_defaults_for_navier_stokes_momentum_block (HyprePreconditioner *hypre_preconditioner_pt)

Detailed Description

Default settings for various uses of the HYPRE solver.

Default settings for various uses of the Hypre solver.

///////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////

Function Documentation

set_defaults_for_2D_poisson_problem()

void oomph::Hypre_default_settings::set_defaults_for_2D_poisson_problem

(

HyprePreconditioner *

hypre_preconditioner_pt

)

Set default parameters for use as preconditioner in 2D Poisson-type problem.

    {
      // Set iterations to 1
      hypre_preconditioner_pt->set_amg_iterations(1);
 
      // Use simple smoother
      hypre_preconditioner_pt->amg_using_simple_smoothing();
 
      // Smoother types:
      //           0=Jacobi
      //           1=Gauss-Seidel
      hypre_preconditioner_pt->amg_simple_smoother() = 1;
 
      // AMG preconditioner
      hypre_preconditioner_pt->hypre_method() = HyprePreconditioner::BoomerAMG;
 
      // Choose strength parameter for amg
      hypre_preconditioner_pt->amg_strength() = 0.25;
 
      // Coarsening type
      hypre_preconditioner_pt->amg_coarsening() = 0;
    }

References oomph::HyprePreconditioner::amg_coarsening(), oomph::HyprePreconditioner::amg_simple_smoother(), oomph::HyprePreconditioner::amg_strength(), oomph::HyprePreconditioner::amg_using_simple_smoothing(), oomph::HypreInterface::BoomerAMG, oomph::HyprePreconditioner::hypre_method(), and oomph::HyprePreconditioner::set_amg_iterations().

Referenced by FpTestProblem::FpTestProblem(), FSIChannelWithLeafletProblem< ELEMENT >::FSIChannelWithLeafletProblem(), main(), PreconditionedFSICollapsibleChannelProblem< ELEMENT >::PreconditionedFSICollapsibleChannelProblem(), RectangularDrivenCavityProblem< ELEMENT >::RectangularDrivenCavityProblem(), set_defaults_for_3D_poisson_problem(), set_defaults_for_navier_stokes_momentum_block(), FSIChannelWithLeafletProblem< ELEMENT >::set_iterative_solver(), oomph::SpaceTimeNavierStokesSubsidiaryPreconditioner::setup(), TorusProblem< ELEMENT >::TorusProblem(), and TurekProblem< FLUID_ELEMENT, SOLID_ELEMENT >::TurekProblem().

set_defaults_for_3D_poisson_problem()

void oomph::Hypre_default_settings::set_defaults_for_3D_poisson_problem

(

HyprePreconditioner *

hypre_preconditioner_pt

)

Set default parameters for use as preconditioner in 3D Poisson-type problem.

    {
      // Set default settings as for 2D Poisson
      set_defaults_for_2D_poisson_problem(hypre_preconditioner_pt);
 
      // Change strength parameter for amg
      hypre_preconditioner_pt->amg_strength() = 0.7;
    }

References oomph::HyprePreconditioner::amg_strength(), and set_defaults_for_2D_poisson_problem().

Referenced by BoussinesqPreconditioner::BoussinesqPreconditioner(), and RefineableConvectionProblem< NST_ELEMENT, AD_ELEMENT >::switch_to_iterative_linear_solver().

set_defaults_for_navier_stokes_momentum_block()

void oomph::Hypre_default_settings::set_defaults_for_navier_stokes_momentum_block

(

HyprePreconditioner *

hypre_preconditioner_pt

)

Set default parameters for use as preconditioner in for momentum block in Navier-Stokes problem

    {
      // Set default settings as for 2D Poisson
      set_defaults_for_2D_poisson_problem(hypre_preconditioner_pt);
 
      // Change smoother type:
      //           0=Jacobi
      //           1=Gauss-Seidel
      hypre_preconditioner_pt->amg_simple_smoother() = 0;
 
      // Set smoother damping
      hypre_preconditioner_pt->amg_damping() = 0.5;
 
      // Change strength parameter for amg
      hypre_preconditioner_pt->amg_strength() = 0.75;
    }

References oomph::HyprePreconditioner::amg_damping(), oomph::HyprePreconditioner::amg_simple_smoother(), oomph::HyprePreconditioner::amg_strength(), and set_defaults_for_2D_poisson_problem().

Referenced by BoussinesqPreconditioner::BoussinesqPreconditioner(), FSIChannelWithLeafletProblem< ELEMENT >::FSIChannelWithLeafletProblem(), RectangularDrivenCavityProblem< ELEMENT >::RectangularDrivenCavityProblem(), and RefineableConvectionProblem< NST_ELEMENT, AD_ELEMENT >::switch_to_iterative_linear_solver().