SpECTRE Documentation Coverage Report
Current view: top level - Evolution/Systems/ForceFree - ElectromagneticVariables.hpp Hit Total Coverage
Commit: c4864ba59ab2d0d4227eb983d3e1eb61f059bc16 Lines: 7 24 29.2 %
Date: 2024-05-05 16:16:17
Legend: Lines: hit not hit

          Line data    Source code
       1           0 : // Distributed under the MIT License.
       2             : // See LICENSE.txt for details.
       3             : 
       4             : #pragma once
       5             : 
       6             : #include "DataStructures/DataBox/Tag.hpp"
       7             : #include "DataStructures/Tensor/TypeAliases.hpp"
       8             : #include "Evolution/Systems/ForceFree/Tags.hpp"
       9             : #include "PointwiseFunctions/GeneralRelativity/TagsDeclarations.hpp"
      10             : #include "Utilities/TMPL.hpp"
      11             : 
      12             : /// \cond
      13             : class DataVector;
      14             : namespace gsl {
      15             : template <typename T>
      16             : class not_null;
      17             : }  // namespace gsl
      18             : /// \endcond
      19             : 
      20             : namespace ForceFree {
      21             : 
      22             : /*!
      23             :  * \brief Computes electric field $E^i$ from TildeE or magnetic field $B^i$ from
      24             :  * TildeB.
      25             :  */
      26           1 : void em_field_from_evolved_fields(
      27             :     const gsl::not_null<tnsr::I<DataVector, 3>*> vector,
      28             :     const tnsr::I<DataVector, 3>& densitized_vector,
      29             :     const Scalar<DataVector>& sqrt_det_spatial_metric);
      30             : 
      31             : /*!
      32             :  * \brief Computes electric charge density $q$ from TildeQ.
      33             :  */
      34           1 : void charge_density_from_tilde_q(
      35             :     const gsl::not_null<Scalar<DataVector>*> charge_density,
      36             :     const Scalar<DataVector>& tilde_q,
      37             :     const Scalar<DataVector>& sqrt_det_spatial_metric);
      38             : 
      39             : /*!
      40             :  * \brief Computes electric current density $J^i$ from TildeJ.
      41             :  */
      42           1 : void electric_current_density_from_tilde_j(
      43             :     const gsl::not_null<tnsr::I<DataVector, 3>*> electric_current_density,
      44             :     const tnsr::I<DataVector, 3>& tilde_j,
      45             :     const Scalar<DataVector>& sqrt_det_spatial_metric,
      46             :     const Scalar<DataVector>& lapse);
      47             : 
      48             : namespace Tags {
      49             : /*!
      50             :  * \brief Compute item for electric field $E^i$ from TildeE.
      51             :  *
      52             :  * \note This ComputeTag is solely for observation purpose, not related to
      53             :  * actual time evolution.
      54             :  */
      55           1 : struct ElectricFieldCompute : ElectricField, db::ComputeTag {
      56           0 :   using argument_tags =
      57             :       tmpl::list<TildeE, gr::Tags::SqrtDetSpatialMetric<DataVector>>;
      58           0 :   using return_type = tnsr::I<DataVector, 3>;
      59           0 :   using base = ElectricField;
      60             : 
      61           0 :   static constexpr auto function = &em_field_from_evolved_fields;
      62             : };
      63             : 
      64             : /*!
      65             :  * \brief Compute item for magnetic field $B^i$ from TildeB.
      66             :  *
      67             :  * \note This ComputeTag is solely for observation purpose, not related to
      68             :  * actual time evolution.
      69             :  */
      70           1 : struct MagneticFieldCompute : MagneticField, db::ComputeTag {
      71           0 :   using argument_tags =
      72             :       tmpl::list<TildeB, gr::Tags::SqrtDetSpatialMetric<DataVector>>;
      73           0 :   using return_type = tnsr::I<DataVector, 3>;
      74           0 :   using base = MagneticField;
      75             : 
      76           0 :   static constexpr auto function = &em_field_from_evolved_fields;
      77             : };
      78             : 
      79             : /*!
      80             :  * \brief Compute item for electric charge density $q$ from TildeQ.
      81             :  *
      82             :  * \note This ComputeTag is solely for observation purpose, not related to
      83             :  * actual time evolution.
      84             :  */
      85           1 : struct ChargeDensityCompute : ChargeDensity, db::ComputeTag {
      86           0 :   using argument_tags =
      87             :       tmpl::list<TildeQ, gr::Tags::SqrtDetSpatialMetric<DataVector>>;
      88           0 :   using return_type = Scalar<DataVector>;
      89           0 :   using base = ChargeDensity;
      90             : 
      91           0 :   static constexpr auto function = &charge_density_from_tilde_q;
      92             : };
      93             : 
      94             : /*!
      95             :  * \brief Compute item for electric current density $J^i$ from TildeJ.
      96             :  *
      97             :  * \note This ComputeTag is solely for observation purpose, not related to
      98             :  * actual time evolution.
      99             :  */
     100           1 : struct ElectricCurrentDensityCompute : ElectricCurrentDensity, db::ComputeTag {
     101           0 :   using argument_tags = tmpl::list<TildeJ, gr::Tags::Lapse<DataVector>,
     102             :                                    gr::Tags::SqrtDetSpatialMetric<DataVector>>;
     103           0 :   using return_type = tnsr::I<DataVector, 3>;
     104           0 :   using base = ElectricCurrentDensity;
     105             : 
     106           0 :   static constexpr auto function = &electric_current_density_from_tilde_j;
     107             : };
     108             : 
     109             : }  // namespace Tags
     110             : }  // namespace ForceFree

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