Line data    Source code

       1           0 : // Distributed under the MIT License.
       2             : // See LICENSE.txt for details.
       3             : 
       4             : #pragma once
       5             : 
       6             : #include <cstddef>
       7             : 
       8             : #include "DataStructures/Tensor/TypeAliases.hpp"
       9             : #include "Evolution/Systems/NewtonianEuler/TagsDeclarations.hpp"
      10             : #include "PointwiseFunctions/Hydro/Tags.hpp"
      11             : #include "Utilities/TMPL.hpp"
      12             : 
      13             : /// \cond
      14             : namespace gsl {
      15             : template <typename T>
      16             : class not_null;
      17             : }  // namespace gsl
      18             : 
      19             : class DataVector;
      20             : /// \endcond
      21             : 
      22             : namespace NewtonianEuler {
      23             : 
      24             : /*!
      25             :  * \brief Compute the conservative variables from the primitive variables.
      26             :  *
      27             :  * \f{align*}
      28             :  * S^i &= \rho v^i \\
      29             :  * e &= \dfrac{1}{2}\rho v^2 + \rho\epsilon
      30             :  * \f}
      31             :  *
      32             :  * where \f$S^i\f$ is the momentum density, \f$e\f$ is the energy density,
      33             :  * \f$\rho\f$ is the mass density, \f$v^i\f$ is the velocity, \f$v^2\f$ is its
      34             :  * magnitude squared, and \f$\epsilon\f$ is the specific internal energy.
      35             :  * In addition, this method returns the mass density as a conservative.
      36             :  */
      37             : template <size_t Dim>
      38           1 : struct ConservativeFromPrimitive {
      39           0 :   using return_tags =
      40             :       tmpl::list<Tags::MassDensityCons, Tags::MomentumDensity<Dim>,
      41             :                  Tags::EnergyDensity>;
      42             : 
      43           0 :   using argument_tags =
      44             :       tmpl::list<hydro::Tags::RestMassDensity<DataVector>,
      45             :                  hydro::Tags::SpatialVelocity<DataVector, Dim>,
      46             :                  hydro::Tags::SpecificInternalEnergy<DataVector>>;
      47             : 
      48           0 :   static void apply(gsl::not_null<Scalar<DataVector>*> mass_density_cons,
      49             :                     gsl::not_null<tnsr::I<DataVector, Dim>*> momentum_density,
      50             :                     gsl::not_null<Scalar<DataVector>*> energy_density,
      51             :                     const Scalar<DataVector>& mass_density,
      52             :                     const tnsr::I<DataVector, Dim>& velocity,
      53             :                     const Scalar<DataVector>& specific_internal_energy);
      54             : };
      55             : }  // namespace NewtonianEuler