mfem::RusanovFlux Class Reference

Rusanov flux, also known as local Lax-Friedrichs, F̂ n = ½(F(u⁺,x)n + F(u⁻,x)n) - ½λ(u⁺ - u⁻) where λ is the maximum characteristic velocity. More...

#include <hyperbolic.hpp>

Inheritance diagram for mfem::RusanovFlux:

Collaboration diagram for mfem::RusanovFlux:

Public Member Functions
	RusanovFlux (const FluxFunction &fluxFunction)
real_t	Eval (const Vector &state1, const Vector &state2, const Vector &nor, FaceElementTransformations &Tr, Vector &flux) const override
	hat(F)n = ½(F(u⁺,x)n + F(u⁻,x)n) - ½λ(u⁺ - u⁻)
Public Member Functions inherited from mfem::RiemannSolver
	RiemannSolver (const FluxFunction &fluxFunction)
virtual	~RiemannSolver ()=default
const FluxFunction &	GetFluxFunction () const
	Get flux function F.

Protected Attributes
Vector	fluxN1
Vector	fluxN2
Protected Attributes inherited from mfem::RiemannSolver
const FluxFunction &	fluxFunction

Detailed Description

Rusanov flux, also known as local Lax-Friedrichs, F̂ n = ½(F(u⁺,x)n + F(u⁻,x)n) - ½λ(u⁺ - u⁻) where λ is the maximum characteristic velocity.

Definition at line 248 of file hyperbolic.hpp.

Constructor & Destructor Documentation

RusanovFlux()

mfem::RusanovFlux::RusanovFlux ( const FluxFunction & fluxFunction )

inline

Definition at line 251 of file hyperbolic.hpp.

Member Function Documentation

Eval()

real_t mfem::RusanovFlux::Eval ( const Vector & state1, const Vector & state2, const Vector & nor, FaceElementTransformations & Tr, Vector & flux ) const

overridevirtual

hat(F)n = ½(F(u⁺,x)n + F(u⁻,x)n) - ½λ(u⁺ - u⁻)

Parameters

[in]	state1	state value at a point from the first element (num_equations)
[in]	state2	state value at a point from the second element (num_equations)
[in]	nor	normal vector (not a unit vector) (dim)
[in]	Tr	face element transformation
[out]	flux	½(F(u⁺,x)n + F(u⁻,x)n) - ½λ(u⁺ - u⁻)

Implements mfem::RiemannSolver.

Definition at line 204 of file hyperbolic.cpp.

Member Data Documentation

fluxN1

Vector mfem::RusanovFlux::fluxN1

mutableprotected

Definition at line 277 of file hyperbolic.hpp.

fluxN2

Vector mfem::RusanovFlux::fluxN2

protected

Definition at line 277 of file hyperbolic.hpp.

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

• fem/hyperbolic.hpp
• fem/hyperbolic.cpp