The L2ZienkiewiczZhuEstimator class implements the Zienkiewicz-Zhu error estimation procedure where the flux averaging is replaced by a global L2 projection (requiring a mass matrix solve). More...

#include <estimators.hpp>

Inheritance diagram for mfem::L2ZienkiewiczZhuEstimator:

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Collaboration diagram for mfem::L2ZienkiewiczZhuEstimator:

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Public Member Functions
	L2ZienkiewiczZhuEstimator (BilinearFormIntegrator &integ, ParGridFunction &sol, ParFiniteElementSpace flux_fes, ParFiniteElementSpace smooth_flux_fes)
	Construct a new L2ZienkiewiczZhuEstimator object. More...

	L2ZienkiewiczZhuEstimator (BilinearFormIntegrator &integ, ParGridFunction &sol, ParFiniteElementSpace &flux_fes, ParFiniteElementSpace &smooth_flux_fes)
	Construct a new L2ZienkiewiczZhuEstimator object. More...

void	SetLocalErrorNormP (int p)
	Set the exponent, p, of the Lp norm used for computing the local element errors. Default value is 1. More...

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

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

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

virtual	~L2ZienkiewiczZhuEstimator ()
	Destroy a L2ZienkiewiczZhuEstimator 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
void	Init (BilinearFormIntegrator &integ, ParGridFunction &sol, ParFiniteElementSpace flux_fes, ParFiniteElementSpace smooth_flux_fes)
	Initialize with the integrator, solution, and flux finite element spaces. More...

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

int	local_norm_p
	Local L_p norm to use, default is 1. More...

Vector	error_estimates

double	total_error

BilinearFormIntegrator *	integ
	Not owned. More...

ParGridFunction *	solution
	Not owned. More...

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

ParFiniteElementSpace *	smooth_flux_space
	Ownership based on the flag own_flux_fes. Its Update() method is called automatically by this class when needed. More...

bool	own_flux_fes
	Ownership flag for flux_space and smooth_flux_space. More...

Detailed Description

The L2ZienkiewiczZhuEstimator class implements the Zienkiewicz-Zhu error estimation procedure where the flux averaging is replaced by a global L2 projection (requiring a mass matrix solve).

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

Implemented for the parallel case only.

Definition at line 217 of file estimators.hpp.

Constructor & Destructor Documentation

mfem::L2ZienkiewiczZhuEstimator::L2ZienkiewiczZhuEstimator	(	BilinearFormIntegrator &	integ,
		ParGridFunction &	sol,
		ParFiniteElementSpace *	flux_fes,
		ParFiniteElementSpace *	smooth_flux_fes
	)

inline

Construct a new L2ZienkiewiczZhuEstimator 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 L2ZienkiewiczZhuEstimator assumes ownership of this FiniteElementSpace and will call its Update() method when needed.
smooth_flux_fes	The L2ZienkiewiczZhuEstimator assumes ownership of this FiniteElementSpace and will call its Update() method when needed.

Definition at line 274 of file estimators.hpp.

mfem::L2ZienkiewiczZhuEstimator::L2ZienkiewiczZhuEstimator	(	BilinearFormIntegrator &	integ,
		ParGridFunction &	sol,
		ParFiniteElementSpace &	flux_fes,
		ParFiniteElementSpace &	smooth_flux_fes
	)

inline

Construct a new L2ZienkiewiczZhuEstimator 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 L2ZienkiewiczZhuEstimator does NOT assume ownership of this FiniteElementSpace; will call its Update() method when needed.
smooth_flux_fes	The L2ZienkiewiczZhuEstimator does NOT assume ownership of this FiniteElementSpace; will call its Update() method when needed.

Definition at line 291 of file estimators.hpp.

virtual mfem::L2ZienkiewiczZhuEstimator::~L2ZienkiewiczZhuEstimator ( )

inlinevirtual

Destroy a L2ZienkiewiczZhuEstimator object. Destroys, if owned, the FiniteElementSpace, flux_space.

Definition at line 316 of file estimators.hpp.

Member Function Documentation

void mfem::L2ZienkiewiczZhuEstimator::ComputeEstimates ( )

protected

Compute the element error estimates.

Definition at line 36 of file estimators.cpp.

virtual const Vector& mfem::L2ZienkiewiczZhuEstimator::GetLocalErrors ( )

inlineoverridevirtual

Get a Vector with all element errors.

Implements mfem::ErrorEstimator.

Definition at line 305 of file estimators.hpp.

virtual double mfem::L2ZienkiewiczZhuEstimator::GetTotalError ( ) const

inlineoverridevirtual

Return the total error from the last error estimate.

Reimplemented from mfem::ErrorEstimator.

Definition at line 302 of file estimators.hpp.

void mfem::L2ZienkiewiczZhuEstimator::Init	(	BilinearFormIntegrator &	integ,
		ParGridFunction &	sol,
		ParFiniteElementSpace *	flux_fes,
		ParFiniteElementSpace *	smooth_flux_fes
	)

inlineprotected

Initialize with the integrator, solution, and flux finite element spaces.

Definition at line 237 of file estimators.hpp.

bool mfem::L2ZienkiewiczZhuEstimator::MeshIsModified ( )

inlineprotected

Check if the mesh of the solution was modified.

Definition at line 252 of file estimators.hpp.

virtual void mfem::L2ZienkiewiczZhuEstimator::Reset ( )

inlineoverridevirtual

Reset the error estimator.

Implements mfem::ErrorEstimator.

Definition at line 312 of file estimators.hpp.

void mfem::L2ZienkiewiczZhuEstimator::SetLocalErrorNormP ( int p )

inline

Set the exponent, p, of the Lp norm used for computing the local element errors. Default value is 1.

Definition at line 299 of file estimators.hpp.

Member Data Documentation

long mfem::L2ZienkiewiczZhuEstimator::current_sequence

protected

Definition at line 220 of file estimators.hpp.

Vector mfem::L2ZienkiewiczZhuEstimator::error_estimates

protected

Definition at line 222 of file estimators.hpp.

ParFiniteElementSpace* mfem::L2ZienkiewiczZhuEstimator::flux_space

protected

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

Definition at line 228 of file estimators.hpp.

BilinearFormIntegrator* mfem::L2ZienkiewiczZhuEstimator::integ

protected

Not owned.

Definition at line 225 of file estimators.hpp.

int mfem::L2ZienkiewiczZhuEstimator::local_norm_p

protected

Local L_p norm to use, default is 1.

Definition at line 221 of file estimators.hpp.

bool mfem::L2ZienkiewiczZhuEstimator::own_flux_fes

protected

Ownership flag for flux_space and smooth_flux_space.

Definition at line 234 of file estimators.hpp.

ParFiniteElementSpace* mfem::L2ZienkiewiczZhuEstimator::smooth_flux_space

protected

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

Definition at line 231 of file estimators.hpp.

ParGridFunction* mfem::L2ZienkiewiczZhuEstimator::solution

protected

Not owned.

Definition at line 226 of file estimators.hpp.

double mfem::L2ZienkiewiczZhuEstimator::total_error

protected

Definition at line 223 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