SpECTRE  v2021.11.01
ah::ComputeHorizonVolumeQuantities Struct Reference

Given the generalized harmonic variables in the volume, computes the quantities that will be interpolated onto an apparent horizon. More...

#include <ComputeHorizonVolumeQuantities.hpp>

Public Types

using allowed_src_tags = tmpl::list< gr::Tags::SpacetimeMetric< 3, Frame::Inertial >, GeneralizedHarmonic::Tags::Pi< 3, Frame::Inertial >, GeneralizedHarmonic::Tags::Phi< 3, Frame::Inertial >, Tags::deriv< GeneralizedHarmonic::Tags::Phi< 3, Frame::Inertial >, tmpl::size_t< 3 >, Frame::Inertial > >
 
using required_src_tags = tmpl::list< gr::Tags::SpacetimeMetric< 3, Frame::Inertial >, GeneralizedHarmonic::Tags::Pi< 3, Frame::Inertial >, GeneralizedHarmonic::Tags::Phi< 3, Frame::Inertial > >
 
template<typename TargetFrame >
using allowed_dest_tags_target_frame = tmpl::list< gr::Tags::SpatialMetric< 3, TargetFrame >, gr::Tags::InverseSpatialMetric< 3, TargetFrame >, gr::Tags::ExtrinsicCurvature< 3, TargetFrame >, gr::Tags::SpatialChristoffelSecondKind< 3, TargetFrame >, gr::Tags::SpatialRicci< 3, TargetFrame > >
 
template<typename TargetFrame >
using allowed_dest_tags = tmpl::remove_duplicates< tmpl::append< allowed_dest_tags_target_frame< TargetFrame >, allowed_dest_tags_target_frame< Frame::Inertial > > >
 
template<typename TargetFrame >
using required_dest_tags = tmpl::list< gr::Tags::ExtrinsicCurvature< 3, TargetFrame >, gr::Tags::SpatialChristoffelSecondKind< 3, TargetFrame > >
 

Static Public Member Functions

template<typename SrcTagList , typename DestTagList >
static void apply (const gsl::not_null< Variables< DestTagList > * > target_vars, const Variables< SrcTagList > &src_vars, const Mesh< 3 > &mesh)
 Single-frame case.
 
template<typename SrcTagList , typename DestTagList , typename TargetFrame >
static void apply (const gsl::not_null< Variables< DestTagList > * > target_vars, const Variables< SrcTagList > &src_vars, const Mesh< 3 > &mesh, const Jacobian< DataVector, 3, TargetFrame, Frame::Inertial > &jacobian, const InverseJacobian< DataVector, 3, Frame::ElementLogical, TargetFrame > &inverse_jacobian)
 Dual-frame case.
 

Detailed Description

Given the generalized harmonic variables in the volume, computes the quantities that will be interpolated onto an apparent horizon.

This is meant to be the primary compute_vars_to_interpolate for the horizon finder.

SrcTagList and DestTagList have limited flexibility, and their restrictions are static_asserted inside the apply functions. The lack of complete flexibility is intentional, because most computations (e.g. for observers) should be done only on the horizon surface (i.e. after interpolation) as opposed to in the volume; only those computations that require data in the volume (e.g. volume numerical derivatives) should be done here.

For the dual-frame case, numerical derivatives of Jacobians are taken in order to avoid Hessians.

SrcTagList is usually interpolator_source_vars in the Metavariables, and the allowed and required tags in SrcTagList are given by the type aliases allowed_src_tags and required_src_tags below.

DestTagList is usually vars_to_interpolate_to_target in the InterpolationTarget that uses ComputeHorizonVolumeQuantities. The allowed and required tags in DestTagList are given by the type aliases allowed_dest_tags and required_dest_tags below.


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