Dumux::ParallelAMGBackend< GridView, AmgTraits > Class Template Reference

A linear solver based on the ISTL AMG preconditioner and the ISTL BiCGSTAB solver. More...

#include <dumux/linear/amgbackend.hh>

Inheritance diagram for Dumux::ParallelAMGBackend< GridView, AmgTraits >:

Description

template<class GridView, class AmgTraits>
class Dumux::ParallelAMGBackend< GridView, AmgTraits >

A linear solver based on the ISTL AMG preconditioner and the ISTL BiCGSTAB solver.

Public Types
using	Scalar = double

Public Member Functions
	ParallelAMGBackend (const std::string &paramGroup="")
	Construct the backend for the sequential case only. More...
	ParallelAMGBackend (const GridView &gridView, const DofMapper &dofMapper, const std::string &paramGroup="")
	Construct the backend for parallel or sequential runs. More...
template<class Matrix , class Vector >
bool	solve (Matrix &A, Vector &x, Vector &b)
	Solve a linear system. More...
std::string	name () const
	The name of the solver. More...
const Dune::InverseOperatorResult &	result () const
	The result containing the convergence history. More...
template<class Matrix , class Vector >
bool	solve (const Matrix &A, Vector &x, const Vector &b)
	Solve the linear system Ax = b. More...
const std::string &	paramGroup () const
	the parameter group for getting parameter from the parameter tree More...
int	verbosity () const
	the verbosity level More...
void	setVerbosity (int v)
	set the verbosity level More...
int	maxIter () const
	the maximum number of linear solver iterations More...
void	setMaxIter (int i)
	set the maximum number of linear solver iterations More...
double	residReduction () const
	the linear solver residual reduction More...
void	setResidualReduction (double r)
	set the linear solver residual reduction More...
double	relaxation () const
	the linear solver relaxation factor More...
void	setRelaxation (double r)
	set the linear solver relaxation factor More...
int	precondIter () const
	the number of preconditioner iterations More...
void	setPrecondIter (int i)
	set the number of preconditioner iterations More...

Member Typedef Documentation

Scalar

using Dumux::LinearSolver::Scalar = double

inherited

export Scalar type (might be needed to set parameters from output) TODO: Do we need this?

Constructor & Destructor Documentation

ParallelAMGBackend() [1/2]

template<class GridView , class AmgTraits >

Dumux::ParallelAMGBackend< GridView, AmgTraits >::ParallelAMGBackend ( const std::string &  paramGroup = "" )

inline

Construct the backend for the sequential case only.

Parameters

paramGroup

the parameter group for parameter lookup

ParallelAMGBackend() [2/2]

template<class GridView , class AmgTraits >

Dumux::ParallelAMGBackend< GridView, AmgTraits >::ParallelAMGBackend ( const GridView &  gridView, const DofMapper &  dofMapper, const std::string &  paramGroup = ""  )

inline

Construct the backend for parallel or sequential runs.

Parameters

gridView	the grid view on which we are performing the multi-grid
dofMapper	an index mapper for dof entities
paramGroup	the parameter group for parameter lookup

Member Function Documentation

maxIter()

int Dumux::LinearSolver::maxIter ( ) const

inlineinherited

the maximum number of linear solver iterations

name()

template<class GridView , class AmgTraits >

std::string Dumux::ParallelAMGBackend< GridView, AmgTraits >::name ( ) const

inline

The name of the solver.

paramGroup()

const std::string & Dumux::LinearSolver::paramGroup ( ) const

inlineinherited

the parameter group for getting parameter from the parameter tree

precondIter()

int Dumux::LinearSolver::precondIter ( ) const

inlineinherited

the number of preconditioner iterations

relaxation()

double Dumux::LinearSolver::relaxation ( ) const

inlineinherited

the linear solver relaxation factor

residReduction()

double Dumux::LinearSolver::residReduction ( ) const

inlineinherited

the linear solver residual reduction

result()

template<class GridView , class AmgTraits >

const Dune::InverseOperatorResult & Dumux::ParallelAMGBackend< GridView, AmgTraits >::result ( ) const

inline

The result containing the convergence history.

setMaxIter()

void Dumux::LinearSolver::setMaxIter ( int  i )

inlineinherited

set the maximum number of linear solver iterations

setPrecondIter()

void Dumux::LinearSolver::setPrecondIter ( int  i )

inlineinherited

set the number of preconditioner iterations

setRelaxation()

void Dumux::LinearSolver::setRelaxation ( double  r )

inlineinherited

set the linear solver relaxation factor

setResidualReduction()

void Dumux::LinearSolver::setResidualReduction ( double  r )

inlineinherited

set the linear solver residual reduction

setVerbosity()

void Dumux::LinearSolver::setVerbosity ( int  v )

inlineinherited

set the verbosity level

solve() [1/2]

template<class Matrix , class Vector >

bool Dumux::LinearSolver::solve ( const Matrix &  A, Vector &  x, const Vector &  b  )

inlineinherited

Solve the linear system Ax = b.

Note

This has to be overloaded by the actual solver

solve() [2/2]

template<class GridView , class AmgTraits >

template<class Matrix , class Vector >

bool Dumux::ParallelAMGBackend< GridView, AmgTraits >::solve ( Matrix &  A, Vector &  x, Vector &  b  )

inline

Solve a linear system.

Parameters

A	the matrix
x	the seeked solution vector, containing the initial solution upon entry
b	the right hand side vector

Todo:

Check whether the default accumulation mode atOnceAccu is needed.

Todo:

Todo:

make parameters changeable at runtime from input file / parameter tree

verbosity()

int Dumux::LinearSolver::verbosity ( ) const

inlineinherited

the verbosity level

---

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

• amgbackend.hh