Projects the rest mass density \(\rho\), pressure \(p\), Lorentz factor times the spatial velocity \(W v^i\), magnetic field \(B^i\), and the divergence cleaning field \(\Phi\) so they can be projected to the subcells and sent to neighbors for subcell reconstruction. More...

#include <PrimitiveGhostData.hpp>

Public Types
using	return_tags = tmpl::list<>

using	argument_tags = tmpl::list<::Tags::Variables< hydro::grmhd_tags< DataVector > >, domain::Tags::Mesh< 3 >, evolution::dg::subcell::Tags::Mesh< 3 > >

Static Public Member Functions
static Variables< prims_to_reconstruct_tags >	apply (const Variables< hydro::grmhd_tags< DataVector > > &prims, const Mesh< 3 > &dg_mesh, const Mesh< 3 > &subcell_mesh) noexcept

Detailed Description

Projects the rest mass density \(\rho\), pressure \(p\), Lorentz factor times the spatial velocity \(W v^i\), magnetic field \(B^i\), and the divergence cleaning field \(\Phi\) so they can be projected to the subcells and sent to neighbors for subcell reconstruction.

The computation copies the data from the primitive variables to a new Variables and computes \(W v^i\), then does the projection. In the future we will likely want to elide this copy but that requires support from the actions.

This mutator is passed what Metavars::SubcellOptions::GhostDataToSlice must be set to.

Note: We are ultimately projecting the primitive variables rather than computing them on the subcells. This introduces truncation level errors, but from tests so far this seems to be fine and is what is done with local time stepping ADER-DG.

Public Types

Static Public Member Functions

Detailed Description