NewtonianEuler::Limiters::Minmod< VolumeDim > Class Template Reference

A minmod-based generalized slope limiter for the NewtonianEuler system. More...

#include <Minmod.hpp>

Classes
struct	ApplyFlattener
struct	VariablesToLimit

Public Types
using	ConservativeVarsMinmod = ::Limiters::Minmod< VolumeDim, tmpl::list< NewtonianEuler::Tags::MassDensityCons, NewtonianEuler::Tags::MomentumDensity< VolumeDim >, NewtonianEuler::Tags::EnergyDensity > >
using	options = implementation defined
using	PackagedData = typename ConservativeVarsMinmod::PackagedData
using	package_argument_tags = typename ConservativeVarsMinmod::package_argument_tags
using	limit_tags = implementation defined
using	limit_argument_tags = implementation defined

Public Member Functions
	Minmod (::Limiters::MinmodType minmod_type, NewtonianEuler::Limiters::VariablesToLimit vars_to_limit, double tvb_constant, bool apply_flattener, bool disable_for_debugging=false)
	Minmod (const Minmod &)=default
Minmod &	operator= (const Minmod &)=default
	Minmod (Minmod &&)=default
Minmod &	operator= (Minmod &&)=default
void	pup (PUP::er &p)
void	package_data (gsl::not_null< PackagedData * > packaged_data, const Scalar< DataVector > &mass_density_cons, const tnsr::I< DataVector, VolumeDim > &momentum_density, const Scalar< DataVector > &energy_density, const Mesh< VolumeDim > &mesh, const std::array< double, VolumeDim > &element_size, const OrientationMap< VolumeDim > &orientation_map) const
	Package data for sending to neighbor elements.
bool	operator() (gsl::not_null< Scalar< DataVector > * > mass_density_cons, gsl::not_null< tnsr::I< DataVector, VolumeDim > * > momentum_density, gsl::not_null< Scalar< DataVector > * > energy_density, const Mesh< VolumeDim > &mesh, const Element< VolumeDim > &element, const tnsr::I< DataVector, VolumeDim, Frame::ElementLogical > &logical_coords, const std::array< double, VolumeDim > &element_size, const Scalar< DataVector > &det_inv_logical_to_inertial_jacobian, const EquationsOfState::EquationOfState< false, 2 > &equation_of_state, const std::unordered_map< DirectionalId< VolumeDim >, PackagedData, boost::hash< DirectionalId< VolumeDim > > > &neighbor_data) const
	Limits the solution on the element.

Static Public Member Functions
static std::string	name ()

Static Public Attributes
static constexpr Options::String	help

Friends
template<size_t LocalDim>
bool	operator== (const Minmod< LocalDim > &lhs, const Minmod< LocalDim > &rhs)

Detailed Description

template<size_t VolumeDim>
class NewtonianEuler::Limiters::Minmod< VolumeDim >

A minmod-based generalized slope limiter for the NewtonianEuler system.

Implements the three minmod-based generalized slope limiters from [41] Sec. 2.4: $\mathrm{\Lambda }{\mathrm{\Pi }}^1$, $\mathrm{\Lambda }{\mathrm{\Pi }}^N$, and MUSCL. See the documentation of the system-agnostic Limiters::Minmod limiter for a general discussion of the algorithm and the various options that control the action of the limiter.

This implemention is specialized to the NewtonianEuler evolution system. By specializing the limiter to the system, we can add two features that improve its robustness:

• the limiter can be applied to the system's characteristic variables. This is the recommendation of the reference, because it reduces spurious oscillations in the post-limiter solution.
• after limiting, the solution can be processed to remove any remaining unphysical values like negative densities and pressures. We do this by scaling the solution around its mean (a "flattener" or "bounds-preserving" filter). Note: the flattener is applied to all elements, including those where the limiter did not act to reduce the solution's slopes.

Member Data Documentation

help

template<size_t VolumeDim>

constexpr Options::String NewtonianEuler::Limiters::Minmod< VolumeDim >::help

staticconstexpr

Initial value:

= {
      "A Minmod limiter specialized to the NewtonianEuler system"}

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

• src/Evolution/Systems/NewtonianEuler/Limiters/Minmod.hpp