simple.h

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// ------------------------------------------------------
//
// SPDX-License-Identifier: GPL-2.0-or-later
//
// SPDX-FileCopyrightText: Copyright (C) 2011-2026 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_material_model_simple_h
#define _aspect_material_model_simple_h

#include <aspect/material_model/interface.h>
#include <aspect/material_model/equation_of_state/linearized_incompressible.h>
#include <aspect/simulator_access.h>

namespace aspect
{
  namespace MaterialModel
  {
    template <int dim>
    class Simple : public MaterialModel::Interface<dim>, public ::aspect::SimulatorAccess<dim>
    {
      public:
        void evaluate(const MaterialModel::MaterialModelInputs<dim> &in,
                      MaterialModel::MaterialModelOutputs<dim> &out) const override;

        bool is_compressible () const override;
        static
        void
        declare_parameters (ParameterHandler &prm);

        void
        parse_parameters (ParameterHandler &prm) override;

      private:
        double reference_T;
        double eta;
        double composition_viscosity_prefactor;
        double thermal_viscosity_exponent;
        double maximum_thermal_prefactor;
        double minimum_thermal_prefactor;

        double k_value;

        EquationOfState::LinearizedIncompressible<dim> equation_of_state;
    };

  }
}

#endif