driver.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 EXADG_FLUID_STRUCTURE_INTERACTION_DRIVER_H_
#define EXADG_FLUID_STRUCTURE_INTERACTION_DRIVER_H_
 
// ExaDG
#include <exadg/fluid_structure_interaction/acceleration_schemes/parameters.h>
#include <exadg/fluid_structure_interaction/acceleration_schemes/partitioned_solver.h>
#include <exadg/fluid_structure_interaction/single_field_solvers/fluid.h>
#include <exadg/fluid_structure_interaction/single_field_solvers/structure.h>
#include <exadg/fluid_structure_interaction/user_interface/application_base.h>
#include <exadg/functions_and_boundary_conditions/interface_coupling.h>
#include <exadg/utilities/timer_tree.h>
 
namespace ExaDG
{
namespace FSI
{
template<int dim, typename Number>
class Driver
{
private:
  typedef dealii::LinearAlgebra::distributed::Vector<Number> VectorType;
 
public:
  Driver(std::string const &                           input_file,
         MPI_Comm const &                              comm,
         std::shared_ptr<ApplicationBase<dim, Number>> application,
         bool const                                    is_test);
 
  void
  setup();
 
  void
  solve() const;
 
  void
  print_performance_results(double const total_time) const;
 
private:
  void
  setup_interface_coupling();
 
  void
  set_start_time() const;
 
  void
  synchronize_time_step_size() const;
 
  void
  coupling_structure_to_ale(VectorType const & displacement_structure) const;
 
  void
  coupling_structure_to_fluid(unsigned int const iteration) const;
 
  void
  coupling_fluid_to_structure(bool const end_of_time_step) const;
 
  void
  solve_subproblem_ale(VectorType const & displacement_structure) const;
 
  void
  solve_subproblem_fluid(unsigned int const iteration,
                         bool const         update_velocity,
                         bool const         update_pressure) const;
 
  void
  solve_subproblem_structure(unsigned int const iteration) const;
 
  void
  apply_dirichlet_neumann_scheme(VectorType &       displacement_structure_updated,
                                 VectorType const & displacement_structure,
                                 unsigned int       iteration) const;
 
  // MPI communicator
  MPI_Comm const mpi_comm;
 
  // output to std::cout
  dealii::ConditionalOStream pcout;
 
  // do not print wall times if is_test
  bool const is_test;
 
  // application
  std::shared_ptr<ApplicationBase<dim, Number>> application;
 
  std::shared_ptr<SolverStructure<dim, Number>> structure;
 
  std::shared_ptr<SolverFluid<dim, Number>> fluid;
 
  // interface coupling
  std::shared_ptr<InterfaceCoupling<1, dim, Number>> structure_to_fluid;
  std::shared_ptr<InterfaceCoupling<1, dim, Number>> structure_to_ale;
  std::shared_ptr<InterfaceCoupling<1, dim, Number>> fluid_to_structure;
 
  // Parameters for partitioned FSI schemes
  Parameters parameters;
 
  // Computation time
  mutable TimerTree timer_tree;
 
  // Partitioned FSI solver
  std::shared_ptr<PartitionedSolver<dim, Number>> partitioned_solver;
};
 
} // namespace FSI
} // namespace ExaDG
 
#endif /* EXADG_FLUID_STRUCTURE_INTERACTION_DRIVER_H_ */