GeneralizedHarmonic::gauges::Actions::InitializeDampedHarmonic< Dim, UseRollon > Struct Template Reference

Initialize the damped harmonic gauge, either with or without a rollon function. More...

#include <InitializeDampedHarmonic.hpp>

Public Types
using	frame = Frame::Inertial
using	const_global_cache_tags = tmpl::list< GeneralizedHarmonic::gauges::Tags::DhGaugeParameters< UseRollon > >
using	simple_tags = tmpl::conditional_t< UseRollon, tmpl::list< GeneralizedHarmonic::Tags::InitialGaugeH< Dim, frame >, GeneralizedHarmonic::Tags::SpacetimeDerivInitialGaugeH< Dim, frame > >, tmpl::list<> >
using	compute_tags = tmpl::conditional_t< UseRollon, DampedHarmonicRollonCompute< frame >, DampedHarmonicCompute< frame > >

Static Public Member Functions
template<typename DbTagsList , typename... InboxTags, typename Metavariables , typename ArrayIndex , typename ActionList , typename ParallelComponent >
static auto	apply (db::DataBox< DbTagsList > &box, const tuples::TaggedTuple< InboxTags... > &, const Parallel::GlobalCache< Metavariables > &, const ArrayIndex &, const ActionList, const ParallelComponent *const) noexcept

Detailed Description

template<size_t Dim, bool UseRollon>
struct GeneralizedHarmonic::gauges::Actions::InitializeDampedHarmonic< Dim, UseRollon >

Initialize the damped harmonic gauge, either with or without a rollon function.

See GeneralizedHarmonic::gauges::damped_harmonic() for details on the condition.

When the non-rollon gauge is initialized, Eq. 9 and 10 of [72] are used to compute the time derivatives for the lapse and shift to compute the new \(\Pi_{ab}\).

Warning

The rollon gauge does not support moving meshes.

When the rollon gauge is used:

DataBox:

• Uses:
  • domain::Tags::Domain<Dim, Frame::Inertial>
  • domain::CoordinateMaps::Tags::CoordinateMap<Dim, Frame::Grid, Frame::Inertial>
  • domain::Tags::InverseJacobian<Dim, Frame::Logical, Frame::Inertial>
  • domain::Tags::Mesh<Dim>
  • gr::Tags::SpacetimeMetric<Dim, Frame::Inertial>
  • GeneralizedHarmonic::Tags::Pi<Dim, Frame::Inertial>
  • GeneralizedHarmonic::Tags::Phi<Dim, Frame::Inertial>
• Adds:
  • GeneralizedHarmonic::Tags::InitialGaugeH<Dim, Frame::Inertial>
  • GeneralizedHarmonic::Tags::SpacetimeDerivInitialGaugeH<Dim, Frame::Inertial>
  • GeneralizedHarmonic::Tags::GaugeH<Dim, Frame::Inertial>
  • GeneralizedHarmonic::Tags::SpacetimeDerivGaugeH<Dim, Frame::Inertial>
• Removes: nothing
• Modifies: nothing

When the non-rollon gauge is used:

DataBox:

• Uses:
  • Initialization::Tags::InitialTime
  • domain::Tags::ElementMap<Dim, Frame::Grid>
  • domain::CoordinateMaps::Tags::CoordinateMap<Dim, Frame::Grid, Frame::Inertial>
  • domain::Tags::Coordinates<Dim, Frame::Logical>
  • domain::Tags::FunctionsOfTime
  • gr::Tags::SpacetimeMetric<Dim, Frame::Inertial>
  • GeneralizedHarmonic::Tags::Pi<Dim, Frame::Inertial>
  • GeneralizedHarmonic::Tags::Phi<Dim, Frame::Inertial>
• Adds:
  • GeneralizedHarmonic::Tags::GaugeH<Dim, Frame::Inertial>
  • GeneralizedHarmonic::Tags::SpacetimeDerivGaugeH<Dim, Frame::Inertial>
• Removes: nothing
• Modifies:
  • GeneralizedHarmonic::Tags::Pi<Dim, Frame::Inertial>

Note

This action relies on the SetupDataBox aggregated initialization mechanism, so Actions::SetupDataBox must be present in the Initialization phase action list prior to this action.