line_plot_calculation.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_INCOMPRESSIBLE_NAVIER_STOKES_POSTPROCESSOR_LINE_PLOT_CALCULATION_H_
#define EXADG_INCOMPRESSIBLE_NAVIER_STOKES_POSTPROCESSOR_LINE_PLOT_CALCULATION_H_
 
// deal.II
#include <deal.II/dofs/dof_handler.h>
#include <deal.II/lac/la_parallel_vector.h>
 
// ExaDG
#include <exadg/incompressible_navier_stokes/postprocessor/line_plot_data.h>
 
namespace ExaDG
{
namespace IncNS
{
/*
 *  Evaluate quantities along lines.
 *
 *  Assumptions/Restrictions:
 *
 *   - straight lines, points are distributed equidistantly along the line
 *
 *   - no statistical averaging, instantaneous quantities are calculated
 */
template<int dim, typename Number>
class LinePlotCalculator
{
public:
  typedef dealii::LinearAlgebra::distributed::Vector<Number> VectorType;
 
  LinePlotCalculator(MPI_Comm const & comm);
 
  void
  setup(dealii::DoFHandler<dim> const & dof_handler_velocity_in,
        dealii::DoFHandler<dim> const & dof_handler_pressure_in,
        dealii::Mapping<dim> const &    mapping_in,
        LinePlotData<dim> const &       line_plot_data_in);
 
  void
  evaluate(VectorType const & velocity, VectorType const & pressure) const;
 
  TimeControl time_control;
 
private:
  MPI_Comm const mpi_comm;
 
  mutable bool clear_files;
 
  dealii::ObserverPointer<dealii::DoFHandler<dim> const> dof_handler_velocity;
  dealii::ObserverPointer<dealii::DoFHandler<dim> const> dof_handler_pressure;
  dealii::ObserverPointer<dealii::Mapping<dim> const>    mapping;
 
  LinePlotData<dim> data;
};
 
} // namespace IncNS
} // namespace ExaDG
 
#endif /* EXADG_INCOMPRESSIBLE_NAVIER_STOKES_POSTPROCESSOR_LINE_PLOT_CALCULATION_H_ */