Line data    Source code

       1           0 : // Distributed under the MIT License.
       2             : // See LICENSE.txt for details.
       3             : 
       4             : #pragma once
       5             : 
       6             : #include <array>
       7             : #include <cstddef>
       8             : #include <memory>
       9             : #include <string>
      10             : #include <unordered_map>
      11             : #include <utility>
      12             : 
      13             : #include "DataStructures/DataBox/Protocols/Mutator.hpp"
      14             : #include "Domain/CoordinateMaps/CoordinateMap.hpp"
      15             : #include "Domain/CoordinateMaps/Tags.hpp"
      16             : #include "Domain/ElementMap.hpp"
      17             : #include "Domain/FunctionsOfTime/FunctionOfTime.hpp"
      18             : #include "Domain/FunctionsOfTime/Tags.hpp"
      19             : #include "Evolution/DgSubcell/Tags/Coordinates.hpp"
      20             : #include "Evolution/DgSubcell/Tags/Inactive.hpp"
      21             : #include "Evolution/DgSubcell/Tags/Mesh.hpp"
      22             : #include "Evolution/DgSubcell/Tags/OnSubcellFaces.hpp"
      23             : #include "Evolution/Initialization/Tags.hpp"
      24             : #include "Evolution/Systems/ScalarAdvection/Tags.hpp"
      25             : #include "Evolution/Systems/ScalarAdvection/VelocityField.hpp"
      26             : #include "NumericalAlgorithms/Spectral/Mesh.hpp"
      27             : #include "NumericalAlgorithms/Spectral/Quadrature.hpp"
      28             : #include "Time/Tags/Time.hpp"
      29             : #include "Utilities/ErrorHandling/Assert.hpp"
      30             : #include "Utilities/Gsl.hpp"
      31             : #include "Utilities/ProtocolHelpers.hpp"
      32             : #include "Utilities/TMPL.hpp"
      33             : 
      34             : /// \cond
      35             : namespace domain {
      36             : namespace Tags {
      37             : template <size_t Dim, typename Frame>
      38             : struct Coordinates;
      39             : template <size_t VolumeDim>
      40             : struct Mesh;
      41             : }  // namespace Tags
      42             : }  // namespace domain
      43             : /// \endcond
      44             : 
      45             : namespace ScalarAdvection::subcell {
      46             : /*!
      47             :  * \brief Allocate and set the velocity field needed for evolving
      48             :  * ScalarAdvection system when using a DG-subcell hybrid scheme.
      49             :  *
      50             :  * Uses:
      51             :  * - DataBox:
      52             :  *   * `Tags::Time`
      53             :  *   * `evolution::dg::subcell::Tags::Mesh<Dim>`
      54             :  *   * `domain::Tags::ElementMap<Dim, Frame::Grid>`
      55             :  *   * `Tags::CoordinateMap<Dim, Frame::Grid, Frame::Inertial>`
      56             :  *   * `domain::Tags::FunctionsOfTime`
      57             :  *   * `evolution::dg::subcell::Tags::Coordinates<Dim, Frame::ElementLogical>`
      58             :  *
      59             :  * DataBox changes:
      60             :  * - Adds:
      61             :  *   * `evolution::dg::subcell::Tags::Inactive<velocity_field>`
      62             :  *   * `evolution::dg::subcell::Tags::OnSubcellFaces<velocity_field, Dim>`
      63             :  * where `velocity_field` is `ScalarAdvection::Tags::VelocityField<Dim>`.
      64             :  *
      65             :  * - Removes: nothing
      66             :  * - Modifies: nothing
      67             :  *
      68             :  * \note This mutator is meant to be used with
      69             :  * `Initialization::Actions::AddSimpleTags`.
      70             :  */
      71             : template <size_t Dim>
      72           1 : struct VelocityAtFace : tt::ConformsTo<db::protocols::Mutator> {
      73           0 :   using simple_tags_from_options = tmpl::list<::Tags::Time>;
      74             : 
      75           0 :   using velocity_field = ::ScalarAdvection::Tags::VelocityField<Dim>;
      76           0 :   using subcell_velocity_field =
      77             :       ::evolution::dg::subcell::Tags::Inactive<velocity_field>;
      78           0 :   using subcell_faces_velocity_field =
      79             :       ::evolution::dg::subcell::Tags::OnSubcellFaces<velocity_field, Dim>;
      80             : 
      81           0 :   using vars = typename velocity_field::type;
      82           0 :   using subcell_vars = typename subcell_velocity_field::type;
      83           0 :   using face_vars = typename subcell_faces_velocity_field::type::value_type;
      84             : 
      85           0 :   using return_tags =
      86             :       tmpl::list<subcell_velocity_field, subcell_faces_velocity_field>;
      87             : 
      88           0 :   using argument_tags = tmpl::list<
      89             :       ::Tags::Time,
      90             :       evolution::dg::subcell::Tags::Mesh<Dim>,
      91             :       domain::Tags::ElementMap<Dim, Frame::Grid>,
      92             :       domain::CoordinateMaps::Tags::CoordinateMap<Dim, Frame::Grid,
      93             :                                                   Frame::Inertial>,
      94             :       domain::Tags::FunctionsOfTime,
      95             :       evolution::dg::subcell::Tags::Coordinates<Dim, Frame::ElementLogical>>;
      96             : 
      97           0 :   static void apply(
      98             :       const gsl::not_null<subcell_vars*> cell_centered_vars,
      99             :       const gsl::not_null<std::array<face_vars, Dim>*> face_centered_vars,
     100             :       const double initial_time, const Mesh<Dim>& subcell_mesh,
     101             :       const ElementMap<Dim, Frame::Grid>& logical_to_grid_map,
     102             :       const domain::CoordinateMapBase<Frame::Grid, Frame::Inertial, Dim>&
     103             :           grid_to_inertial_map,
     104             :       const std::unordered_map<
     105             :           std::string,
     106             :           std::unique_ptr<domain::FunctionsOfTime::FunctionOfTime>>&
     107             :           functions_of_time,
     108             :       const tnsr::I<DataVector, Dim, Frame::ElementLogical>&
     109             :           subcell_logical_coordinates) {
     110             :     // check if the subcell mesh is isotropic
     111             :     ASSERT(Mesh<Dim>(subcell_mesh.extents(0), subcell_mesh.basis(0),
     112             :                      subcell_mesh.quadrature(0)) == subcell_mesh,
     113             :            "The subcell mesh must have isotropic basis, quadrature. and "
     114             :            "extents but got "
     115             :                << subcell_mesh);
     116             : 
     117             :     const size_t num_grid_points = subcell_mesh.number_of_grid_points();
     118             :     const auto cell_centered_inertial_coords =
     119             :         grid_to_inertial_map(logical_to_grid_map(subcell_logical_coordinates),
     120             :                              initial_time, functions_of_time);
     121             : 
     122             :     // Set cell-centered vars. Need to first do without prefix then move into
     123             :     // prefixed Variables.
     124             :     vars no_prefix_cell_centered_vars{num_grid_points};
     125             :     // Note: This assumes the velocity field is the hard-coded one in the
     126             :     // compute tag
     127             :     ::ScalarAdvection::Tags::VelocityFieldCompute<Dim>::function(
     128             :         make_not_null(&no_prefix_cell_centered_vars),
     129             :         cell_centered_inertial_coords);
     130             :     *cell_centered_vars = std::move(no_prefix_cell_centered_vars);
     131             : 
     132             :     // Set face-centered vars.
     133             :     for (size_t dim = 0; dim < Dim; ++dim) {
     134             :       const auto basis = make_array<Dim>(subcell_mesh.basis(0));
     135             :       auto quadrature = make_array<Dim>(subcell_mesh.quadrature(0));
     136             :       auto extents = make_array<Dim>(subcell_mesh.extents(0));
     137             :       gsl::at(extents, dim) = subcell_mesh.extents(0) + 1;
     138             :       gsl::at(quadrature, dim) = Spectral::Quadrature::FaceCentered;
     139             :       const Mesh<Dim> face_centered_mesh{extents, basis, quadrature};
     140             :       const auto face_centered_logical_coords =
     141             :           logical_coordinates(face_centered_mesh);
     142             :       const auto face_centered_inertial_coords = grid_to_inertial_map(
     143             :           logical_to_grid_map(face_centered_logical_coords), initial_time,
     144             :           functions_of_time);
     145             : 
     146             :       ::ScalarAdvection::Tags::VelocityFieldCompute<Dim>::function(
     147             :           make_not_null(&(gsl::at(*face_centered_vars, dim))),
     148             :           face_centered_inertial_coords);
     149             :     }
     150             :   }
     151             : };
     152             : }  // namespace ScalarAdvection::subcell