driver_quasi_static_problems.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_STRUCTURE_TIME_INTEGRATION_DRIVER_QUASI_STATIC_PROBLEMS_H_
#define EXADG_STRUCTURE_TIME_INTEGRATION_DRIVER_QUASI_STATIC_PROBLEMS_H_
 
// deal.II
#include <deal.II/base/timer.h>
#include <deal.II/lac/la_parallel_vector.h>
 
// ExaDG
#include <exadg/utilities/timer_tree.h>
 
namespace ExaDG
{
namespace Structure
{
// forward declarations
class Parameters;
 
template<int dim, typename Number>
class PostProcessor;
 
namespace Interface
{
template<typename Number>
class Operator;
}
 
template<int dim, typename Number>
class DriverQuasiStatic
{
private:
  typedef dealii::LinearAlgebra::distributed::Vector<Number> VectorType;
 
public:
  DriverQuasiStatic(std::shared_ptr<Interface::Operator<Number>> operator_in,
                    std::shared_ptr<PostProcessor<dim, Number>>  postprocessor_in,
                    Parameters const &                           param_in,
                    MPI_Comm const &                             mpi_comm_in,
                    bool const                                   is_test_in);
 
  void
  setup();
 
  void
  solve();
 
  void
  print_iterations() const;
 
  std::shared_ptr<TimerTree>
  get_timings() const;
 
private:
  void
  initialize_vectors();
 
  void
  initialize_solution();
 
  void
  do_solve();
 
  void
  output_solver_info_header(double const load_factor);
 
  std::tuple<unsigned int, unsigned int>
  solve_step(double const load_factor, bool const update_preconditioner);
 
  void
  postprocessing() const;
 
  std::shared_ptr<Interface::Operator<Number>> pde_operator;
 
  std::shared_ptr<PostProcessor<dim, Number>> postprocessor;
 
  Parameters const & param;
 
  MPI_Comm const mpi_comm;
 
  bool const is_test;
 
  dealii::ConditionalOStream pcout;
 
  // vectors
  VectorType solution;
  VectorType rhs_vector;
 
  // We need to store a vector in order to extrapolate the solution to the next
  // load step and obtain an accurate initial guess for the Newton solver.
  VectorType displacement_increment;
 
  // For the purpose of extrapolating the displacements, we also need to store the
  // load_increment of the last load step.
  double last_load_increment;
 
  unsigned int step_number;
 
  std::shared_ptr<TimerTree> timer_tree;
 
  std::pair<
    unsigned int /* calls */,
    std::tuple<unsigned long long, unsigned long long> /* iteration counts {Newton, linear}*/>
    iterations;
};
 
} // namespace Structure
} // namespace ExaDG
 
#endif /* EXADG_STRUCTURE_TIME_INTEGRATION_DRIVER_QUASI_STATIC_PROBLEMS_H_ */