VariableFixing::LimitLorentzFactor Class Reference

Limit the maximum Lorentz factor to LorentzFactorCap in regions where the density is below MaxDensityCutoff. More...

#include <LimitLorentzFactor.hpp>

Classes
struct	Enable
	Whether or not the limiting is enabled. More...
struct	LorentzFactorCap
	Largest Lorentz factor allowed. If a larger one is found, normalize velocity to have the Lorentz factor be this value. More...
struct	MaxDensityCutoff
	Do not apply the Lorentz factor cap above this density. More...

Public Types
using	options = tmpl::list< MaxDensityCutoff, LorentzFactorCap, Enable >
using	return_tags = tmpl::list< hydro::Tags::LorentzFactor< DataVector >, hydro::Tags::SpatialVelocity< DataVector, 3 > >
using	argument_tags = tmpl::list< hydro::Tags::RestMassDensity< DataVector > >

Public Member Functions
	LimitLorentzFactor (double max_density_cutoff, double lorentz_factor_cap, bool enable)
	LimitLorentzFactor (const LimitLorentzFactor &)=default
LimitLorentzFactor &	operator= (const LimitLorentzFactor &)=default
	LimitLorentzFactor (LimitLorentzFactor &&)=default
LimitLorentzFactor &	operator= (LimitLorentzFactor &&)=default
void	pup (PUP::er &p)
void	operator() (gsl::not_null< Scalar< DataVector > * > lorentz_factor, gsl::not_null< tnsr::I< DataVector, 3, Frame::Inertial > * > spatial_velocity, const Scalar< DataVector > &rest_mass_density) const

Static Public Attributes
static constexpr Options::String	help

Friends
bool	operator== (const LimitLorentzFactor &lhs, const LimitLorentzFactor &rhs)

Detailed Description

Limit the maximum Lorentz factor to LorentzFactorCap in regions where the density is below MaxDensityCutoff.

The Lorentz factor is set to LorentzFactorCap and the spatial velocity is adjusted according to:

\begin{align} v^i_{(\textrm{new})} = \sqrt{\left(1 - \frac{1}{W_{(\textrm{new})}^2}\right) \left(1 - \frac{1}{W_{(\textrm{old})}^2}\right)^{-1}} v^i_{(\textrm{old})} \end{align}

Member Data Documentation

help

constexpr Options::String VariableFixing::LimitLorentzFactor::help

staticconstexpr

Initial value:

= {
      "Limit the maximum Lorentz factor to LorentzFactorCap in regions where "
      "the\n"
      "density is below MaxDensityCutoff. The Lorentz factor is set to\n"
      "LorentzFactorCap and the spatial velocity is adjusted accordingly."}

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

• src/Evolution/VariableFixing/LimitLorentzFactor.hpp