Collects data structures and algorithms designed for scalar finite element methods primarily meant for second-order elliptic boundary value problems. More...

Classes
class	FeLagrangeO1Quad
	Linear Lagrange finite element on the quadrilateral reference element. More...

class	FeLagrangeO1Segment
	Linear Lagrange finite element on a line segment. More...

class	FeLagrangeO1Tria
	Linear Lagrange finite element on triangular reference element. More...

class	FeLagrangeO2Quad
	Quadratic Lagrangian finite element on a quadrilateral reference element. More...

class	FeLagrangeO2Segment
	Quadratic Lagrangian finite element on a line segment. More...

class	FeLagrangeO2Tria
	Quadratic Lagrangian finite element on a triangular reference element. More...

class	FeLagrangeO3Quad
	Cubic Lagrangian finite element on a quadrilateral reference element. More...

class	FeLagrangeO3Segment
	Cubic Lagrangian finite element on a line segment. More...

class	FeLagrangeO3Tria
	Cubic Lagrangian finite elment on a triangular reference element. More...

class	FeSpaceLagrangeO1
	(Bi)Linear Lagrangian Finite Element space More...

class	FeSpaceLagrangeO2
	Quadratic Lagrangian Finite Element space. More...

class	FeSpaceLagrangeO3
	Cubic Lagrangian Finite Element space. More...

class	LinearFELaplaceElementMatrix
	Computing the element matrix for the (negative) Laplacian and linear finite elements. More...

class	LinearFELocalLoadVector
	Class for computation of local load vector for linear finite elements. More...

class	MassEdgeMatrixProvider
	Quadrature-based computation of local mass matrix for an edge. More...

class	PrecomputedScalarReferenceFiniteElement
	Helper class which stores a ScalarReferenceFiniteElement with precomputed values at the nodes of a quadrature rule. More...

class	ReactionDiffusionElementMatrixProvider
	Class for local quadrature based computations for Lagrangian finite elements and second-order scalar elliptic BVPs. More...

class	ScalarLoadEdgeVectorProvider
	Local edge contributions to element vector. More...

class	ScalarLoadElementVectorProvider
	Local computation of general element (load) vector for scalar finite elements; volume contributions only. More...

class	UniformScalarFESpace
	Space of scalar valued finite element functions on a hybrid 2D mesh More...

Typedefs
using	gdof_idx_t = lf::assemble::gdof_idx_t

using	ldof_idx_t = lf::assemble::ldof_idx_t

using	size_type = lf::assemble::size_type

using	dim_t = lf::assemble::dim_t

using	glb_idx_t = lf::assemble::glb_idx_t

using	sub_idx_t = lf::base::sub_idx_t

using	quad_rule_collection_t = std::map<lf::base::RefEl, lf::quad::QuadRule>
	Auxiliary data structure for passing collections of quadrature rules.

Functions
std::shared_ptr< spdlog::logger > &	LinearFeLocalLoadVectorLogger ()
	Used by LinearFELocalLoadVector to log additional (debug) information during vector assembly.

std::shared_ptr< spdlog::logger > &	ReactionDiffusionElementMatrixProviderLogger ()
	logger for ReactionDiffusionElementMatrixProvider

std::shared_ptr< spdlog::logger > &	MassEdgeMatrixProviderLogger ()
	logger for MassEdgeMatrixProvider

std::shared_ptr< spdlog::logger > &	ScalarLoadElementVectorProviderLogger ()
	logger used by ScalarLoadElementVectorProvider

std::shared_ptr< spdlog::logger > &	ScalarLoadEdgeVectorProviderLogger ()
	logger for ScalarLoadEdgeVectorProvider class template.

template<class PTR , class DIFF_COEFF , class REACTION_COEFF >
	ReactionDiffusionElementMatrixProvider (PTR fe_space, DIFF_COEFF alpha, REACTION_COEFF gamma) -> ReactionDiffusionElementMatrixProvider< typename PTR::element_type::Scalar, DIFF_COEFF, REACTION_COEFF >

template<class PTR , class DIFF_COEFF , class REACTION_COEFF >
	ReactionDiffusionElementMatrixProvider (PTR fe_space, DIFF_COEFF alpha, REACTION_COEFF gamma, std::map< lf::base::RefEl, lf::quad::QuadRule >) -> ReactionDiffusionElementMatrixProvider< typename PTR::element_type::Scalar, DIFF_COEFF, REACTION_COEFF >

template<class PTR , mesh::utils::MeshFunction COEFF, class EDGESELECTOR = base::PredicateTrue>
	MassEdgeMatrixProvider (PTR, COEFF coeff, EDGESELECTOR edge_predicate=base::PredicateTrue{}) -> MassEdgeMatrixProvider< typename PTR::element_type::Scalar, COEFF, EDGESELECTOR >

template<class PTR , class MESH_FUNCTION >
	ScalarLoadElementVectorProvider (PTR fe_space, MESH_FUNCTION mf) -> ScalarLoadElementVectorProvider< typename PTR::element_type::Scalar, MESH_FUNCTION >

template<class PTR , class FUNCTOR , class EDGESELECTOR = base::PredicateTrue>
	ScalarLoadEdgeVectorProvider (PTR, FUNCTOR, EDGESELECTOR=base::PredicateTrue{}) -> ScalarLoadEdgeVectorProvider< typename PTR::element_type::Scalar, FUNCTOR, EDGESELECTOR >

template<typename SCALAR >
void	PrintInfo (std::ostream &o, const UniformScalarFESpace< SCALAR > &fes, unsigned ctrl)

template<typename SCALAR >
std::ostream &	operator<< (std::ostream &o, const UniformScalarFESpace< SCALAR > &fes)

Variables
const unsigned int	kUniformScalarFESpaceOutMesh = 1
	mesh information will be printed

const unsigned int	kUniformScalarFESpaceOutDofh = 2
	information about the dof handler will be printed.

const unsigned int	kUniformScalarFESpaceOutRsfs = 4
	information about the reference shape functions will be printed

Detailed Description

Collects data structures and algorithms designed for scalar finite element methods primarily meant for second-order elliptic boundary value problems.

This namespace contains a number of classes/functions which can be used to solve boundary value problems with uniform, scalar Finite elements:

Uniform means that the approximation space has uniform order of approximation over the whole mesh. Or in other words: The shape functions of a given approximation space depend only on the underlying reference element of a mesh entity.
Scalar means that the approximation space is always scalar valued, the shape functions are scalar valued.

Examples of approximation spaces that the methods/classes in this namespace can represent/handle are:

n-th order Lagrangian Shape functions
1st order Crouzeix-Raviart approximation space
Broken spaces (e.g. for Discontinuous Galerkin Approximations)

Here are examples of use cases not supported by lf::uscalfe:

Approximation spaces where the polynomial degree depends on the mesh, respectively hierarchic approximation spaces (e.g. for hp-fem)
Non-Scalar valued approximation spaces such as EdgeFunctions/Nedelec elements or Thomas-Raviart elements.

Typedef Documentation

◆ dim_t

using lf::uscalfe::dim_t = lf::assemble::dim_t

Type for (co-)dimensions

Definition at line 32 of file lagr_fe.h.

◆ gdof_idx_t

using lf::uscalfe::gdof_idx_t = lf::assemble::gdof_idx_t

Type for indices into global matrices/vectors

Definition at line 26 of file lagr_fe.h.

◆ glb_idx_t

using lf::uscalfe::glb_idx_t = lf::assemble::glb_idx_t

Type for global index of entities

Definition at line 34 of file lagr_fe.h.

◆ ldof_idx_t

using lf::uscalfe::ldof_idx_t = lf::assemble::ldof_idx_t

Type for indices referring to entity matrices/vectors

Definition at line 28 of file lagr_fe.h.

◆ quad_rule_collection_t

using lf::uscalfe::quad_rule_collection_t = std::map<lf::base::RefEl, lf::quad::QuadRule>

Auxiliary data structure for passing collections of quadrature rules.

This type can be used to pass several quadrature rules to a function, when different quadrature rules for different types of entities are required.

Definition at line 32 of file loc_comp_ellbvp.h.

◆ size_type

using lf::uscalfe::size_type = lf::assemble::size_type

Type for vector length/matrix sizes

Definition at line 30 of file lagr_fe.h.

◆ sub_idx_t

using lf::uscalfe::sub_idx_t = lf::base::sub_idx_t

Type for indexing sub-entities

Definition at line 36 of file lagr_fe.h.

Function Documentation

◆ LinearFeLocalLoadVectorLogger()

std::shared_ptr< spdlog::logger > & lf::uscalfe::LinearFeLocalLoadVectorLogger ( )

Used by LinearFELocalLoadVector to log additional (debug) information during vector assembly.

Definition at line 167 of file lin_fe.cc.

References lf::base::InitLogger().

Referenced by lf::uscalfe::LinearFELocalLoadVector< SCALAR, FUNCTOR >::Eval().

◆ MassEdgeMatrixProvider()

template<class PTR , mesh::utils::MeshFunction COEFF, class EDGESELECTOR = base::PredicateTrue>

lf::uscalfe::MassEdgeMatrixProvider	(	PTR	,
		COEFF	coeff,
		EDGESELECTOR	edge_predicate = base::PredicateTrue{} ) -> MassEdgeMatrixProvider< typename PTR::element_type::Scalar, COEFF, EDGESELECTOR >

◆ MassEdgeMatrixProviderLogger()

std::shared_ptr< spdlog::logger > & lf::uscalfe::MassEdgeMatrixProviderLogger ( )

logger for MassEdgeMatrixProvider

Definition at line 27 of file loc_comp_ellbvp.cc.

References lf::base::InitLogger().

◆ operator<<()

template<typename SCALAR >

std::ostream & lf::uscalfe::operator<<	(	std::ostream &	o,
		const UniformScalarFESpace< SCALAR > &	fes )

Definition at line 445 of file uniform_scalar_fe_space.h.

◆ PrintInfo()

template<typename SCALAR >

void lf::uscalfe::PrintInfo	(	std::ostream &	o,
		const UniformScalarFESpace< SCALAR > &	fes,
		unsigned	ctrl )

Definition at line 420 of file uniform_scalar_fe_space.h.

References lf::base::RefEl::kPoint(), lf::base::RefEl::kQuad(), lf::base::RefEl::kSegment(), lf::base::RefEl::kTria(), kUniformScalarFESpaceOutDofh, kUniformScalarFESpaceOutMesh, kUniformScalarFESpaceOutRsfs, lf::uscalfe::UniformScalarFESpace< SCALAR >::LocGlobMap(), lf::uscalfe::UniformScalarFESpace< SCALAR >::Mesh(), lf::assemble::DofHandler::NumDofs(), and lf::uscalfe::UniformScalarFESpace< SCALAR >::NumRefShapeFunctions().

◆ ReactionDiffusionElementMatrixProvider() [1/2]

template<class PTR , class DIFF_COEFF , class REACTION_COEFF >

lf::uscalfe::ReactionDiffusionElementMatrixProvider	(	PTR	fe_space,
		DIFF_COEFF	alpha,
		REACTION_COEFF	gamma ) -> ReactionDiffusionElementMatrixProvider< typename PTR::element_type::Scalar, DIFF_COEFF, REACTION_COEFF >

◆ ReactionDiffusionElementMatrixProvider() [2/2]

template<class PTR , class DIFF_COEFF , class REACTION_COEFF >

lf::uscalfe::ReactionDiffusionElementMatrixProvider	(	PTR	fe_space,
		DIFF_COEFF	alpha,
		REACTION_COEFF	gamma,
		std::map< lf::base::RefEl, lf::quad::QuadRule >	) -> ReactionDiffusionElementMatrixProvider< typename PTR::element_type::Scalar, DIFF_COEFF, REACTION_COEFF >

◆ ReactionDiffusionElementMatrixProviderLogger()

std::shared_ptr< spdlog::logger > & lf::uscalfe::ReactionDiffusionElementMatrixProviderLogger ( )

logger for ReactionDiffusionElementMatrixProvider

Definition at line 21 of file loc_comp_ellbvp.cc.

References lf::base::InitLogger().

Referenced by lf::uscalfe::ReactionDiffusionElementMatrixProvider< SCALAR, DIFF_COEFF, REACTION_COEFF >::Eval().

◆ ScalarLoadEdgeVectorProvider()

template<class PTR , class FUNCTOR , class EDGESELECTOR = base::PredicateTrue>

lf::uscalfe::ScalarLoadEdgeVectorProvider	(	PTR	,
		FUNCTOR	,
		EDGESELECTOR	= base::PredicateTrue{} ) -> ScalarLoadEdgeVectorProvider< typename PTR::element_type::Scalar, FUNCTOR, EDGESELECTOR >

◆ ScalarLoadEdgeVectorProviderLogger()

std::shared_ptr< spdlog::logger > & lf::uscalfe::ScalarLoadEdgeVectorProviderLogger ( )

logger for ScalarLoadEdgeVectorProvider class template.

Definition at line 39 of file loc_comp_ellbvp.cc.

References lf::base::InitLogger().

◆ ScalarLoadElementVectorProvider()

template<class PTR , class MESH_FUNCTION >

lf::uscalfe::ScalarLoadElementVectorProvider	(	PTR	fe_space,
		MESH_FUNCTION	mf ) -> ScalarLoadElementVectorProvider< typename PTR::element_type::Scalar, MESH_FUNCTION >

◆ ScalarLoadElementVectorProviderLogger()

std::shared_ptr< spdlog::logger > & lf::uscalfe::ScalarLoadElementVectorProviderLogger ( )

logger used by ScalarLoadElementVectorProvider

Definition at line 33 of file loc_comp_ellbvp.cc.

References lf::base::InitLogger().

Referenced by lf::uscalfe::ScalarLoadElementVectorProvider< SCALAR, MESH_FUNCTION >::Eval().

Variable Documentation

◆ kUniformScalarFESpaceOutDofh

const unsigned int lf::uscalfe::kUniformScalarFESpaceOutDofh = 2

information about the dof handler will be printed.

To be used with PrintInfo(std::ostream&, const UniformScalarFESpace<SCALAR>&, unsigned int)

Definition at line 199 of file uniform_scalar_fe_space.h.

Referenced by PrintInfo().

◆ kUniformScalarFESpaceOutMesh

const unsigned int lf::uscalfe::kUniformScalarFESpaceOutMesh = 1

mesh information will be printed

Output control variables for PrintInfo:

To be used with PrintInfo(std::ostream&, const UniformScalarFESpace<SCALAR>&, unsigned int)

Definition at line 191 of file uniform_scalar_fe_space.h.

Referenced by PrintInfo().

◆ kUniformScalarFESpaceOutRsfs

const unsigned int lf::uscalfe::kUniformScalarFESpaceOutRsfs = 4

information about the reference shape functions will be printed

To be used with PrintInfo(std::ostream&, const UniformScalarFESpace<SCALAR>&, unsigned int)

Definition at line 207 of file uniform_scalar_fe_space.h.

Referenced by PrintInfo().

Classes

Typedefs

Functions

Variables

Detailed Description

Typedef Documentation

◆ dim_t

◆ gdof_idx_t

◆ glb_idx_t

◆ ldof_idx_t

◆ quad_rule_collection_t

◆ size_type

◆ sub_idx_t

Function Documentation

◆ LinearFeLocalLoadVectorLogger()

◆ MassEdgeMatrixProvider()

◆ MassEdgeMatrixProviderLogger()

◆ operator<<()

◆ PrintInfo()

◆ ReactionDiffusionElementMatrixProvider() [1/2]

◆ ReactionDiffusionElementMatrixProvider() [2/2]

◆ ReactionDiffusionElementMatrixProviderLogger()

◆ ScalarLoadEdgeVectorProvider()

◆ ScalarLoadEdgeVectorProviderLogger()

◆ ScalarLoadElementVectorProvider()

◆ ScalarLoadElementVectorProviderLogger()

Variable Documentation

◆ kUniformScalarFESpaceOutDofh

◆ kUniformScalarFESpaceOutMesh

◆ kUniformScalarFESpaceOutRsfs