Line data    Source code

       1           0 : // Distributed under the MIT License.
       2             : // See LICENSE.txt for details.
       3             : 
       4             : #pragma once
       5             : 
       6             : #include <algorithm>
       7             : #include <array>
       8             : #include <cstddef>
       9             : #include <functional>
      10             : #include <tuple>
      11             : #include <type_traits>
      12             : #include <utility>
      13             : 
      14             : #include "DataStructures/DataBox/PrefixHelpers.hpp"
      15             : #include "DataStructures/DataBox/Prefixes.hpp"
      16             : #include "DataStructures/Matrix.hpp"
      17             : #include "DataStructures/Variables.hpp"
      18             : #include "Domain/Structure/Direction.hpp"
      19             : #include "Domain/Structure/DirectionalId.hpp"
      20             : #include "Domain/Structure/DirectionalIdMap.hpp"
      21             : #include "Domain/Structure/ElementId.hpp"
      22             : #include "Domain/Structure/SegmentId.hpp"
      23             : #include "NumericalAlgorithms/DiscontinuousGalerkin/LiftFlux.hpp"
      24             : #include "NumericalAlgorithms/Spectral/Mesh.hpp"
      25             : #include "NumericalAlgorithms/Spectral/Projection.hpp"
      26             : #include "NumericalAlgorithms/Spectral/SegmentSize.hpp"
      27             : #include "Utilities/Algorithm.hpp"
      28             : #include "Utilities/ConstantExpressions.hpp"
      29             : #include "Utilities/ErrorHandling/Assert.hpp"
      30             : #include "Utilities/Gsl.hpp"
      31             : #include "Utilities/MakeArray.hpp"
      32             : #include "Utilities/TMPL.hpp"
      33             : /// \cond
      34             : template <size_t VolumeDim>
      35             : class ElementId;
      36             : template <size_t VolumeDim>
      37             : class OrientationMap;
      38             : 
      39             : /// \endcond
      40             : 
      41             : namespace dg {
      42             : 
      43             : template <size_t VolumeDim>
      44           0 : using MortarId = DirectionalId<VolumeDim>;
      45             : template <size_t MortarDim>
      46           0 : using MortarSize = std::array<Spectral::SegmentSize, MortarDim>;
      47             : template <size_t VolumeDim, typename ValueType>
      48           0 : using MortarMap = DirectionalIdMap<VolumeDim, ValueType>;
      49             : 
      50             : /// \ingroup DiscontinuousGalerkinGroup
      51             : /// Find a mesh for a mortar capable of representing data from either
      52             : /// of two faces.
      53             : ///
      54             : /// \warning Make sure the two face meshes are oriented the same, i.e.
      55             : /// their dimensions align. This is facilitated by the `orientation`
      56             : /// passed to `domain::create_initial_mesh`, for example.
      57             : template <size_t Dim>
      58           1 : Mesh<Dim> mortar_mesh(const Mesh<Dim>& face_mesh1, const Mesh<Dim>& face_mesh2);
      59             : 
      60             : /// \ingroup DiscontinuousGalerkinGroup
      61             : /// Determine the size of the mortar (i.e., the part of the face it
      62             : /// covers) for communicating with a neighbor.  This is the size
      63             : /// relative to the size of \p self, and will not generally agree with
      64             : /// that determined by \p neighbor.
      65             : template <size_t Dim>
      66           1 : MortarSize<Dim - 1> mortar_size(const ElementId<Dim>& self,
      67             :                                 const ElementId<Dim>& neighbor,
      68             :                                 size_t dimension,
      69             :                                 const OrientationMap<Dim>& orientation);
      70             : 
      71             : /// \ingroup DiscontinuousGalerkinGroup
      72             : /// Determine the size of the mortar in block coordinates.  The
      73             : /// segments are given in the block of \p self.
      74             : template <size_t Dim>
      75           1 : std::array<SegmentId, Dim - 1> mortar_segments(
      76             :     const ElementId<Dim>& self, const ElementId<Dim>& neighbor,
      77             :     size_t dimension, const OrientationMap<Dim>& orientation);
      78             : 
      79             : /// @{
      80             : /// \ingroup DiscontinuousGalerkinGroup
      81             : /// Project variables from a face to a mortar.
      82             : template <typename Tags, size_t Dim>
      83           1 : void project_to_mortar(const gsl::not_null<Variables<Tags>*> result,
      84             :                        const Variables<Tags>& vars, const Mesh<Dim>& face_mesh,
      85             :                        const Mesh<Dim>& mortar_mesh,
      86             :                        const MortarSize<Dim>& mortar_size) {
      87             :   Spectral::project(result, vars, face_mesh, mortar_mesh,
      88             :                     make_array<Dim>(Spectral::SegmentSize::Full), mortar_size);
      89             : }
      90             : 
      91             : template <typename Tags, size_t Dim>
      92           1 : Variables<Tags> project_to_mortar(const Variables<Tags>& vars,
      93             :                                   const Mesh<Dim>& face_mesh,
      94             :                                   const Mesh<Dim>& mortar_mesh,
      95             :                                   const MortarSize<Dim>& mortar_size) {
      96             :   Variables<Tags> result{mortar_mesh.number_of_grid_points()};
      97             :   project_to_mortar(make_not_null(&result), vars, face_mesh, mortar_mesh,
      98             :                     mortar_size);
      99             :   return result;
     100             : }
     101             : /// @}
     102             : 
     103             : /// @{
     104             : /// \ingroup DiscontinuousGalerkinGroup
     105             : /// Project variables from a mortar to a face.
     106             : template <typename Tags, size_t Dim>
     107           1 : void project_from_mortar(const gsl::not_null<Variables<Tags>*> result,
     108             :                          const Variables<Tags>& vars,
     109             :                          const Mesh<Dim>& face_mesh,
     110             :                          const Mesh<Dim>& mortar_mesh,
     111             :                          const MortarSize<Dim>& mortar_size) {
     112             :   ASSERT(Spectral::needs_projection(face_mesh, mortar_mesh, mortar_size),
     113             :          "project_from_mortar should not be called if the interface mesh and "
     114             :          "mortar mesh are identical. Please elide the copy instead.");
     115             :   Spectral::project(result, vars, mortar_mesh, face_mesh, mortar_size,
     116             :                     make_array<Dim>(Spectral::SegmentSize::Full));
     117             : }
     118             : 
     119             : template <typename Tags, size_t Dim>
     120           1 : Variables<Tags> project_from_mortar(const Variables<Tags>& vars,
     121             :                                     const Mesh<Dim>& face_mesh,
     122             :                                     const Mesh<Dim>& mortar_mesh,
     123             :                                     const MortarSize<Dim>& mortar_size) {
     124             :   ASSERT(Spectral::needs_projection(face_mesh, mortar_mesh, mortar_size),
     125             :          "project_from_mortar should not be called if the interface mesh and "
     126             :          "mortar mesh are identical. Please elide the copy instead.");
     127             :   Variables<Tags> result{face_mesh.number_of_grid_points()};
     128             :   project_from_mortar(make_not_null(&result), vars, face_mesh, mortar_mesh,
     129             :                       mortar_size);
     130             :   return result;
     131             : }
     132             : /// @}
     133             : }  // namespace dg