Compute the largest characteristic speed of the GRFFE system with divergence cleaning. More...

#include <Characteristics.hpp>

Public Types
using	argument_tags = tmpl::list< gr::Tags::Lapse< DataVector >, gr::Tags::Shift< DataVector, 3 >, gr::Tags::SpatialMetric< DataVector, 3 > >

using	return_type = double

using	base = LargestCharacteristicSpeed

Public Types inherited from ForceFree::Tags::LargestCharacteristicSpeed
using	type = double

Static Public Member Functions
static void	function (gsl::not_null< double * > speed, const Scalar< DataVector > &lapse, const tnsr::I< DataVector, 3 > &shift, const tnsr::ii< DataVector, 3 > &spatial_metric)

Detailed Description

Compute the largest characteristic speed of the GRFFE system with divergence cleaning.

Wave speeds of the fast modes of the GRFFE system are the speed of light.

\begin{align*} \lambda_\pm = \beta^i\beta_i \pm \alpha \end{align*}

where \(\alpha\) is the lapse and \(\beta^i\) is the shift. Therefore the largest characteristic speed is \(\lambda_\text{max} = \sqrt{\beta_i\beta^i}+\alpha\).

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

src/Evolution/Systems/ForceFree/Characteristics.hpp

Public Types

Static Public Member Functions

Detailed Description