free_surface.h

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/*
  Copyright (C) 2011 - 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_mesh_deformation_free_surface_h
#define _aspect_mesh_deformation_free_surface_h

#include <aspect/mesh_deformation/interface.h>

#include <aspect/simulator_access.h>
#include <aspect/simulator/assemblers/interface.h>


namespace aspect
{
  namespace MeshDeformation
  {
    template <int dim>
    class FreeSurface : public Interface<dim>, public SimulatorAccess<dim>
    {
      public:
        void initialize() override;

        void set_assemblers(const SimulatorAccess<dim> &simulator_access,
                            aspect::Assemblers::Manager<dim> &assemblers) const;


        void
        compute_velocity_constraints_on_boundary(const DoFHandler<dim> &mesh_deformation_dof_handler,
                                                 AffineConstraints<double> &mesh_velocity_constraints,
                                                 const std::set<types::boundary_id> &boundary_id) const override;

        bool needs_surface_stabilization () const override;

        static
        void declare_parameters (ParameterHandler &prm);

        void parse_parameters (ParameterHandler &prm) override;

      private:
        void project_velocity_onto_boundary (const DoFHandler<dim> &free_surface_dof_handler,
                                             const IndexSet &mesh_locally_owned,
                                             const IndexSet &mesh_locally_relevant,
                                             LinearAlgebra::Vector &output) const;

        struct SurfaceAdvection
        {
          enum Direction { normal, vertical };
        };

        typename SurfaceAdvection::Direction advection_direction;
    };
  }
}


#endif