amrex::HypreABecLap Class Reference

Struct-interface HYPRE solver for (a - b div beta grad) phi = rhs. More...

#include <AMReX_HypreABecLap.H>

Inheritance diagram for amrex::HypreABecLap:

Public Member Functions
	HypreABecLap (const BoxArray &grids, const DistributionMapping &dmap, const Geometry &geom_, MPI_Comm comm_)
	Bind the solver to a single AMR level described by grids/dmap.
	~HypreABecLap () override
	HypreABecLap (HypreABecLap const &)=delete
	HypreABecLap (HypreABecLap &&)=delete
HypreABecLap &	operator= (HypreABecLap const &)=delete
HypreABecLap &	operator= (HypreABecLap &&)=delete
void	solve (MultiFab &soln, const MultiFab &rhs, Real reltol, Real abstol, int maxiter, const BndryData &bndry, int max_bndry_order) override
	Solve the struct-interface linear system with the configured coefficients.
void	prepareSolver ()
	Build the HYPRE structures and apply runtime parameters.
void	loadVectors (MultiFab &soln, const MultiFab &rhs)
	Copy AMReX solution guess soln and RHS rhs into HYPRE vectors prior to a solve.
Public Member Functions inherited from amrex::Hypre
	Hypre (const BoxArray &grids, const DistributionMapping &dmap, const Geometry &geom, MPI_Comm comm_)
	Construct a HYPRE wrapper bound to the supplied grids.
virtual	~Hypre ()
	Hypre (Hypre &&) noexcept=default
Hypre &	operator= (Hypre &&) noexcept=default
	Hypre (Hypre const &)=delete
Hypre &	operator= (Hypre const &)=delete
void	setScalars (Real sa, Real sb)
	Store constant scalars applied to the a (diagonal) and b (Laplacian) terms.
void	setACoeffs (const MultiFab &alpha)
	Install per-cell a coefficients.
void	setBCoeffs (const Array< const MultiFab *, 3 > &beta)
	Install per-face b coefficients for each spatial direction.
void	setVerbose (int _verbose)
	Set HYPRE verbosity level (_verbose).
void	setIsMatrixSingular (bool flag)
	Flag a singular operator (enables null-space handling in derived classes).
void	setHypreOptionsNamespace (const std::string &ns) noexcept
	Override the ParmParse namespace consulted for HYPRE runtime options (ns).
void	setHypreOldDefault (bool l) noexcept
	Toggle HYPRE's "old default" AMG setup (Falgout + modified classical interpolation) via l.
void	setHypreRelaxType (int n) noexcept
	Choose the relaxation type handed to HYPRE (see HYPRE docs for valid codes) via n.
void	setHypreRelaxOrder (int n) noexcept
	Choose the relaxation ordering (C/F, lexicographic, etc.) via n.
void	setHypreNumSweeps (int n) noexcept
	Set the number of pre/post smoothing sweeps HYPRE executes on each level via n.
void	setHypreStrongThreshold (Real t) noexcept
	Adjust HYPRE's AMG strong-connection threshold used during coarsening via t.

Additional Inherited Members
Public Types inherited from amrex::Hypre
enum class	Interface : int { structed , semi_structed , ij }
	HYPRE interface modes supported. More...
Static Public Member Functions inherited from amrex::Hypre
static HYPRE_Int	ispow2 (HYPRE_Int i)
	Return 1 if i is a power of two, otherwise 0.
static Array< HYPRE_Int, 3 >	loV (const Box &b)
	Convenience helper that casts a box's low corner to HYPRE_Int.
static Array< HYPRE_Int, 3 >	hiV (const Box &b)
	Convenience helper that casts a box's high corner to HYPRE_Int.
Static Public Attributes inherited from amrex::Hypre
static constexpr HYPRE_Int	regular_stencil_size = 2*3 + 1
	Stencil size used on regular cells.
static constexpr HYPRE_Int	eb_stencil_size = 3 *3 *3
	Stencil size used on EB cells (3^D).
Protected Attributes inherited from amrex::Hypre
MPI_Comm	comm = MPI_COMM_NULL
Geometry	geom
int	verbose = 0
bool	old_default = true
int	relax_type = 6
int	relax_order = 1
int	num_sweeps = 2
Real	strong_threshold = Real(0.25)
std::string	options_namespace {"hypre"}
MultiFab	acoefs
Array< MultiFab, 3 >	bcoefs
Real	scalar_a
Real	scalar_b
MultiFab	diaginv
FabFactory< FArrayBox > const *	m_factory = nullptr
BndryData const *	m_bndry = nullptr
int	m_maxorder = -1
bool	is_matrix_singular { false }

Detailed Description

Struct-interface HYPRE solver for (a - b div beta grad) phi = rhs.

Constructor & Destructor Documentation

HypreABecLap() [1/3]

amrex::HypreABecLap::HypreABecLap	(	const BoxArray &	grids,
		const DistributionMapping &	dmap,
		const Geometry &	geom_,
		MPI_Comm	comm_
	)

Bind the solver to a single AMR level described by grids/dmap.

Parameters

grids	Grid layout for the level.
dmap	DistributionMapping for grids.
geom_	Geometry describing the level.
comm_	MPI communicator handed to HYPRE.

~HypreABecLap()

amrex::HypreABecLap::~HypreABecLap ( )

override

HypreABecLap() [2/3]

amrex::HypreABecLap::HypreABecLap ( HypreABecLap const &  )

delete

HypreABecLap() [3/3]

amrex::HypreABecLap::HypreABecLap ( HypreABecLap &&  )

delete

Member Function Documentation

loadVectors()

void amrex::HypreABecLap::loadVectors	(	MultiFab &	soln,
		const MultiFab &	rhs
	)

Copy AMReX solution guess soln and RHS rhs into HYPRE vectors prior to a solve.

operator=() [1/2]

HypreABecLap & amrex::HypreABecLap::operator= ( HypreABecLap &&  )

delete

operator=() [2/2]

HypreABecLap & amrex::HypreABecLap::operator= ( HypreABecLap const &  )

delete

prepareSolver()

void amrex::HypreABecLap::prepareSolver

(

)

Build the HYPRE structures and apply runtime parameters.

solve()

void amrex::HypreABecLap::solve ( MultiFab &  soln, const MultiFab &  rhs, Real  reltol, Real  abstol, int  maxiter, const BndryData &  bndry, int  max_bndry_order  )

overridevirtual

Solve the struct-interface linear system with the configured coefficients.

Parameters

soln	Solution MultiFab (filled on return).
rhs	Right-hand side MultiFab.
reltol	Relative tolerance.
abstol	Absolute tolerance.
maxiter	Maximum number of iterations.
bndry	Boundary data.
max_bndry_order	Maximum order at the boundary.

Implements amrex::Hypre.

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The documentation for this class was generated from the following files:

• /home/runner/work/amrex/amrex/Src/Extern/HYPRE/AMReX_HypreABecLap.H
• /home/runner/work/amrex/amrex/Src/Extern/HYPRE/AMReX_HypreABecLap.cpp