The ZienkiewiczZhuEstimator class implements the Zienkiewicz-Zhu error estimation procedure. More...

#include <estimators.hpp>

Inheritance diagram for mfem::ZienkiewiczZhuEstimator:

Collaboration diagram for mfem::ZienkiewiczZhuEstimator:

Public Member Functions
	ZienkiewiczZhuEstimator (BilinearFormIntegrator &integ, GridFunction &sol, FiniteElementSpace *flux_fes)
	Construct a new ZienkiewiczZhuEstimator object. More...

	ZienkiewiczZhuEstimator (BilinearFormIntegrator &integ, GridFunction &sol, FiniteElementSpace &flux_fes)
	Construct a new ZienkiewiczZhuEstimator object. More...

void	SetWithCoeff (bool w_coeff=true)
	Consider the coefficient in BilinearFormIntegrator to calculate the fluxes for the error estimator. More...

void	SetAnisotropic (bool aniso=true)
	Enable/disable anisotropic estimates. To enable this option, the BilinearFormIntegrator must support the 'd_energy' parameter in its ComputeFluxEnergy() method. More...

void	SetFluxAveraging (int fa)
	Set the way the flux is averaged (smoothed) across elements. More...

double	GetTotalError () const
	Return the total error from the last error estimate. More...

virtual const Vector &	GetLocalErrors ()
	Get a Vector with all element errors. More...

virtual const Array< int > &	GetAnisotropicFlags ()
	Get an Array<int> with anisotropic flags for all mesh elements. Return an empty array when anisotropic estimates are not available or enabled. More...

virtual void	Reset ()
	Reset the error estimator. More...

virtual	~ZienkiewiczZhuEstimator ()
	Destroy a ZienkiewiczZhuEstimator object. Destroys, if owned, the FiniteElementSpace, flux_space. More...

Public Member Functions inherited from mfem::ErrorEstimator
virtual	~ErrorEstimator ()
	Destruct the error estimator. More...

Public Member Functions inherited from mfem::AbstractErrorEstimator
virtual	~AbstractErrorEstimator ()

Protected Member Functions
bool	MeshIsModified ()
	Check if the mesh of the solution was modified. More...

void	ComputeEstimates ()
	Compute the element error estimates. More...

Protected Attributes
long	current_sequence

Vector	error_estimates

double	total_error

bool	anisotropic

Array< int >	aniso_flags

int	flux_averaging

BilinearFormIntegrator *	integ
	Not owned. More...

GridFunction *	solution
	Not owned. More...

FiniteElementSpace *	flux_space
	Ownership based on own_flux_fes. Its Update() method is called automatically by this class when needed. More...

bool	with_coeff

bool	own_flux_fes
	Ownership flag for flux_space. More...

Detailed Description

The ZienkiewiczZhuEstimator class implements the Zienkiewicz-Zhu error estimation procedure.

Zienkiewicz, O.C. and Zhu, J.Z., The superconvergent patch recovery and a posteriori error estimates. Part 1: The recovery technique. Int. J. Num. Meth. Engng. 33, 1331-1364 (1992).

Zienkiewicz, O.C. and Zhu, J.Z., The superconvergent patch recovery and a posteriori error estimates. Part 2: Error estimates and adaptivity. Int. J. Num. Meth. Engng. 33, 1365-1382 (1992).

The required BilinearFormIntegrator must implement the methods ComputeElementFlux() and ComputeFluxEnergy().

Definition at line 81 of file estimators.hpp.

Constructor & Destructor Documentation

mfem::ZienkiewiczZhuEstimator::ZienkiewiczZhuEstimator	(	BilinearFormIntegrator &	integ,
		GridFunction &	sol,
		FiniteElementSpace *	flux_fes
	)

inline

Construct a new ZienkiewiczZhuEstimator object.

Parameters

integ	This BilinearFormIntegrator must implement the methods ComputeElementFlux() and ComputeFluxEnergy().
sol	The solution field whose error is to be estimated.
flux_fes	The ZienkiewiczZhuEstimator assumes ownership of this FiniteElementSpace and will call its Update() method when needed.

Definition at line 118 of file estimators.hpp.

mfem::ZienkiewiczZhuEstimator::ZienkiewiczZhuEstimator	(	BilinearFormIntegrator &	integ,
		GridFunction &	sol,
		FiniteElementSpace &	flux_fes
	)

inline

Construct a new ZienkiewiczZhuEstimator object.

Parameters

integ	This BilinearFormIntegrator must implement the methods ComputeElementFlux() and ComputeFluxEnergy().
sol	The solution field whose error is to be estimated.
flux_fes	The ZienkiewiczZhuEstimator does NOT assume ownership of this FiniteElementSpace; will call its Update() method when needed.

Definition at line 138 of file estimators.hpp.

virtual mfem::ZienkiewiczZhuEstimator::~ZienkiewiczZhuEstimator ( )

inlinevirtual

Destroy a ZienkiewiczZhuEstimator object. Destroys, if owned, the FiniteElementSpace, flux_space.

Definition at line 192 of file estimators.hpp.

Member Function Documentation

void mfem::ZienkiewiczZhuEstimator::ComputeEstimates ( )

protected

Compute the element error estimates.

Definition at line 17 of file estimators.cpp.

virtual const Array<int>& mfem::ZienkiewiczZhuEstimator::GetAnisotropicFlags ( )

inlinevirtual

Get an Array<int> with anisotropic flags for all mesh elements. Return an empty array when anisotropic estimates are not available or enabled.

Implements mfem::AnisotropicErrorEstimator.

Definition at line 181 of file estimators.hpp.

virtual const Vector& mfem::ZienkiewiczZhuEstimator::GetLocalErrors ( )

inlinevirtual

Get a Vector with all element errors.

Implements mfem::ErrorEstimator.

Definition at line 172 of file estimators.hpp.

double mfem::ZienkiewiczZhuEstimator::GetTotalError ( ) const

inline

Return the total error from the last error estimate.

Definition at line 169 of file estimators.hpp.

bool mfem::ZienkiewiczZhuEstimator::MeshIsModified ( )

inlineprotected

Check if the mesh of the solution was modified.

Definition at line 100 of file estimators.hpp.

virtual void mfem::ZienkiewiczZhuEstimator::Reset ( )

inlinevirtual

Reset the error estimator.

Implements mfem::ErrorEstimator.

Definition at line 188 of file estimators.hpp.

void mfem::ZienkiewiczZhuEstimator::SetAnisotropic ( bool aniso = true )

inline

Enable/disable anisotropic estimates. To enable this option, the BilinearFormIntegrator must support the 'd_energy' parameter in its ComputeFluxEnergy() method.

Definition at line 158 of file estimators.hpp.

void mfem::ZienkiewiczZhuEstimator::SetFluxAveraging ( int fa )

inline

Set the way the flux is averaged (smoothed) across elements.

When fa is zero (default), averaging is performed globally. When fa is non-zero, the flux averaging is performed locally for each mesh attribute, i.e. the flux is not averaged across interfaces between different mesh attributes.

Definition at line 166 of file estimators.hpp.

void mfem::ZienkiewiczZhuEstimator::SetWithCoeff ( bool w_coeff = true )

inline

Consider the coefficient in BilinearFormIntegrator to calculate the fluxes for the error estimator.

Definition at line 153 of file estimators.hpp.

Member Data Documentation

Array<int> mfem::ZienkiewiczZhuEstimator::aniso_flags

protected

Definition at line 88 of file estimators.hpp.

bool mfem::ZienkiewiczZhuEstimator::anisotropic

protected

Definition at line 87 of file estimators.hpp.

long mfem::ZienkiewiczZhuEstimator::current_sequence

protected

Definition at line 84 of file estimators.hpp.

Vector mfem::ZienkiewiczZhuEstimator::error_estimates

protected

Definition at line 85 of file estimators.hpp.

int mfem::ZienkiewiczZhuEstimator::flux_averaging

protected

Definition at line 89 of file estimators.hpp.

FiniteElementSpace* mfem::ZienkiewiczZhuEstimator::flux_space

protected

Ownership based on own_flux_fes. Its Update() method is called automatically by this class when needed.

Definition at line 94 of file estimators.hpp.

BilinearFormIntegrator* mfem::ZienkiewiczZhuEstimator::integ

protected

Not owned.

Definition at line 91 of file estimators.hpp.

bool mfem::ZienkiewiczZhuEstimator::own_flux_fes

protected

Ownership flag for flux_space.

Definition at line 97 of file estimators.hpp.

GridFunction* mfem::ZienkiewiczZhuEstimator::solution

protected

Not owned.

Definition at line 92 of file estimators.hpp.

double mfem::ZienkiewiczZhuEstimator::total_error

protected

Definition at line 86 of file estimators.hpp.

bool mfem::ZienkiewiczZhuEstimator::with_coeff

protected

Definition at line 96 of file estimators.hpp.

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

fem/estimators.hpp
fem/estimators.cpp

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation