velocity_gradient.h

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// ------------------------------------------------------
//
// SPDX-License-Identifier: GPL-2.0-or-later
//
// SPDX-FileCopyrightText: Copyright (C) 2015-2025 by the ASPECT authors.
//
// This file is part of ASPECT.
//
// Detailed license information governing the source code and
// contributions can be found in the folder LICENSES and in
// LICENSE and CONTRIBUTING.md at the top level directory.
//
// ------------------------------------------------------

#ifndef _aspect_particle_property_velocity_gradient_h
#define _aspect_particle_property_velocity_gradient_h

#include <aspect/particle/property/interface.h>
#include <aspect/simulator_access.h>

namespace aspect
{
  namespace Particle
  {
    namespace Property
    {
      template <int dim>
      class VelocityGradient : public Interface<dim>, public ::aspect::SimulatorAccess<dim>
      {
        public:
          void
          initialize_one_particle_property (const Point<dim> &position,
                                            std::vector<double> &particle_properties) const override;

          virtual
          void
          update_particle_property (const unsigned int data_position,
                                    const Vector<double> &solution,
                                    const std::vector<Tensor<1,dim>> &gradients,
                                    typename ParticleHandler<dim>::particle_iterator &particle) const override;

          UpdateTimeFlags
          need_update () const override;

          UpdateFlags
          get_needed_update_flags () const override;

          std::vector<std::pair<std::string, unsigned int>>
          get_property_information() const override;
      };
    }
  }
}

#endif