boundary_descriptor.h

/*  ______________________________________________________________________
 *
 *  ExaDG - High-Order Discontinuous Galerkin for the Exa-Scale
 *
 *  Copyright (C) 2021 by the ExaDG authors
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *  ______________________________________________________________________
 */
 
#ifndef INCLUDE_CONVECTION_DIFFUSION_BOUNDARY_DESCRIPTOR_H_
#define INCLUDE_CONVECTION_DIFFUSION_BOUNDARY_DESCRIPTOR_H_
 
// C/C++
#include <memory>
#include <set>
 
// deal.II
#include <deal.II/base/function.h>
#include <deal.II/base/types.h>
 
namespace ExaDG
{
namespace ConvDiff
{
enum class BoundaryType
{
  Undefined,
  Dirichlet,
  Neumann
};
 
template<int dim>
struct BoundaryDescriptor
{
  std::map<dealii::types::boundary_id, std::shared_ptr<dealii::Function<dim>>> dirichlet_bc;
 
  std::map<dealii::types::boundary_id, std::shared_ptr<dealii::Function<dim>>> neumann_bc;
 
  // returns the boundary type
  inline DEAL_II_ALWAYS_INLINE //
    BoundaryType
    get_boundary_type(dealii::types::boundary_id const & boundary_id) const
  {
    if(this->dirichlet_bc.find(boundary_id) != this->dirichlet_bc.end())
      return BoundaryType::Dirichlet;
    else if(this->neumann_bc.find(boundary_id) != this->neumann_bc.end())
      return BoundaryType::Neumann;
 
    AssertThrow(false, dealii::ExcMessage("Boundary type of face is invalid or not implemented."));
 
    return BoundaryType::Undefined;
  }
 
  inline DEAL_II_ALWAYS_INLINE //
    void
    verify_boundary_conditions(
      dealii::types::boundary_id const             boundary_id,
      std::set<dealii::types::boundary_id> const & periodic_boundary_ids) const
  {
    unsigned int counter = 0;
    if(dirichlet_bc.find(boundary_id) != dirichlet_bc.end())
      counter++;
 
    if(neumann_bc.find(boundary_id) != neumann_bc.end())
      counter++;
 
    if(periodic_boundary_ids.find(boundary_id) != periodic_boundary_ids.end())
      counter++;
 
    AssertThrow(counter == 1,
                dealii::ExcMessage("Boundary face with non-unique boundary type found."));
  }
};
 
} // namespace ConvDiff
} // namespace ExaDG
 
#endif /* INCLUDE_CONVECTION_DIFFUSION_BOUNDARY_DESCRIPTOR_H_ */