line_plot_data.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_DATA_H_
#define EXADG_INCOMPRESSIBLE_NAVIER_STOKES_POSTPROCESSOR_LINE_PLOT_DATA_H_
 
// deal.II
#include <deal.II/base/point.h>
 
// ExaDG
#include <exadg/postprocessor/time_control_statistics.h>
#include <exadg/utilities/print_functions.h>
 
// C/C++
#include <memory>
 
namespace ExaDG
{
namespace IncNS
{
enum class QuantityType
{
  Undefined,
  Velocity,
  Pressure,
  SkinFriction,
  ReynoldsStresses,
  PressureCoefficient
};
 
struct Quantity
{
  Quantity() : type(QuantityType::Undefined)
  {
  }
 
  Quantity(QuantityType const & quantity_type) : type(quantity_type)
  {
  }
 
  virtual ~Quantity()
  {
  }
 
  QuantityType type;
};
 
template<int dim>
struct QuantityPressureCoefficient : Quantity
{
  QuantityPressureCoefficient() : Quantity(), reference_point(dealii::Point<dim>())
  {
  }
 
  dealii::Point<dim> reference_point;
};
 
template<int dim>
struct QuantitySkinFriction : Quantity
{
  QuantitySkinFriction()
    : Quantity(),
      viscosity(1.0),
      normal_vector(dealii::Tensor<1, dim, double>()),
      tangent_vector(dealii::Tensor<1, dim, double>())
  {
  }
 
  double                         viscosity;
  dealii::Tensor<1, dim, double> normal_vector;
  dealii::Tensor<1, dim, double> tangent_vector;
};
 
template<int dim>
struct Line
{
  Line() : n_points(2), name("line")
  {
  }
 
  virtual ~Line()
  {
  }
 
  /*
   *  begin and end points of line
   */
  dealii::Point<dim> begin;
  dealii::Point<dim> end;
 
  /*
   *  number of data points written along a line
   */
  unsigned int n_points;
 
  /*
   *  name of line
   */
  std::string name;
 
  /*
   *  Specify for which fields/quantities to write output
   */
  std::vector<std::shared_ptr<Quantity>> quantities;
};
 
/*
 * Derived data structure in order to perform additional averaging
 * in circumferential direction for rotationally symmetric problems.
 *
 * Note that the implementation assumes that line->begin is the
 * center of the circle for circumferential averaging.
 */
template<int dim>
struct LineCircumferentialAveraging : Line<dim>
{
  LineCircumferentialAveraging()
    : Line<dim>(),
      average_circumferential(false),
      n_points_circumferential(4),
      normal_vector(dealii::Tensor<1, dim>())
  {
  }
 
  // activate averaging in circumferential direction
  bool average_circumferential;
 
  // number of points used for averaging in circumferential direction
  // only used in average_circumferential == true
  unsigned int n_points_circumferential;
 
  // defines the averaging plane along with the begin and end points
  // of the line. Has to be specified if averaging in circumferential
  // direction is activated.
  dealii::Tensor<1, dim> normal_vector;
};
 
/*
 * Derived data structure in order to perform additional averaging
 * in homogeneous direction.
 */
template<int dim>
struct LineHomogeneousAveraging : Line<dim>
{
  LineHomogeneousAveraging()
    : Line<dim>(), average_homogeneous_direction(false), averaging_direction(0)
  {
  }
 
  // activate averaging in homogeneous direction
  bool average_homogeneous_direction;
 
  // has to be specified in case of averaging in homogeneous direction
  unsigned int averaging_direction; // x = 0, y = 1, z = 2
};
 
template<int dim>
struct LinePlotDataBase
{
  LinePlotDataBase() : directory("output/"), precision(10)
  {
  }
 
  void
  print_base(dealii::ConditionalOStream & pcout)
  {
    pcout << "  Line plot data:" << std::endl;
    print_parameter(pcout, "Directory", directory);
    print_parameter(pcout, "Precision", precision);
    print_parameter(pcout, "Line", lines.name);
    print_parameter(pcout, "  Quantity", lines.quantity);
  }
 
  /*
   *  output folder
   */
  std::string directory;
 
  /*
   *  precision (number of decimal places when writing to files)
   */
  unsigned int precision;
 
  /*
   *  a vector of lines along which we want to write output
   */
  std::vector<std::shared_ptr<Line<dim>>> lines;
};
 
 
template<int dim>
struct LinePlotData : public LinePlotDataBase<dim>
{
  TimeControlData time_control_data;
 
  void
  print(dealii::ConditionalOStream & pcout)
  {
    if(time_control_data.is_active)
    {
      this->print_base();
      // only makes sense in unsteady case
      time_control_data.print(pcout, true);
    }
  }
};
 
template<int dim>
struct LinePlotDataStatistics : public LinePlotDataBase<dim>
{
  TimeControlDataStatistics time_control_data_statistics;
 
  void
  print(dealii::ConditionalOStream & pcout)
  {
    if(time_control_data_statistics.time_control_data.is_active)
    {
      this->print_base();
      // only makes sense in unsteady case
      time_control_data_statistics.print(pcout, true);
    }
  }
};
 
} // namespace IncNS
} // namespace ExaDG
 
#endif /* EXADG_INCOMPRESSIBLE_NAVIER_STOKES_POSTPROCESSOR_LINE_PLOT_DATA_H_ */