rk_2.h

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/*
 Copyright (C) 2015 - 2024 by the authors of the ASPECT code.
 
 This file is part of ASPECT.
 
 ASPECT 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 2, or (at your option)
 any later version.
 
 ASPECT 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 ASPECT; see the file LICENSE.  If not see
 <http://www.gnu.org/licenses/>.
 */
 
#ifndef _aspect_particle_integrator_rk_2_h
#define _aspect_particle_integrator_rk_2_h
 
#include <aspect/particle/integrator/interface.h>
 
#include <aspect/simulator_access.h>
 
 
namespace aspect
{
  namespace Particle
  {
    namespace Integrator
    {
      template <int dim>
      class RK2 : public Interface<dim>, public SimulatorAccess<dim>
      {
        public:
          RK2();
 
          void
          initialize () override;
 
          void
          local_integrate_step(const typename ParticleHandler<dim>::particle_iterator &begin_particle,
                               const typename ParticleHandler<dim>::particle_iterator &end_particle,
                               const std::vector<Tensor<1,dim>> &old_velocities,
                               const std::vector<Tensor<1,dim>> &velocities,
                               const double dt) override;
 
          bool new_integration_step() override;
 
          std::array<bool, 3> required_solution_vectors() const override;
 
          static
          void
          declare_parameters (ParameterHandler &prm);
 
          void
          parse_parameters (ParameterHandler &prm) override;
 
          static constexpr unsigned int n_integrator_properties = dim;
 
        private:
          unsigned int integrator_substep;
 
          unsigned int property_index_old_location;
 
          bool higher_order_in_time;
      };
 
    }
  }
}
 
#endif