stokes_anisotropic_viscosity.h

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// ------------------------------------------------------
//
// SPDX-License-Identifier: GPL-2.0-or-later
//
// SPDX-FileCopyrightText: Copyright (C) 2025-2026 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_simulator_assemblers_stokes_anisotropic_viscosity_h
#define _aspect_simulator_assemblers_stokes_anisotropic_viscosity_h


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

namespace aspect
{
  namespace Assemblers
  {
    template <int dim>
    class StokesPreconditionerAnisotropicViscosity : public Assemblers::Interface<dim>,
      public SimulatorAccess<dim>
    {
      public:
        void
        execute(internal::Assembly::Scratch::ScratchBase<dim>   &scratch,
                internal::Assembly::CopyData::CopyDataBase<dim> &data) const override;

        void
        create_additional_material_model_outputs(MaterialModel::MaterialModelOutputs<dim> &outputs) const override;
    };

    template <int dim>
    class StokesCompressiblePreconditionerAnisotropicViscosity : public Assemblers::Interface<dim>,
      public SimulatorAccess<dim>
    {
      public:
        void
        execute(internal::Assembly::Scratch::ScratchBase<dim>   &scratch,
                internal::Assembly::CopyData::CopyDataBase<dim> &data) const override;
    };

    template <int dim>
    class StokesIncompressibleTermsAnisotropicViscosity : public Assemblers::Interface<dim>,
      public SimulatorAccess<dim>
    {
      public:
        void
        execute(internal::Assembly::Scratch::ScratchBase<dim>   &scratch,
                internal::Assembly::CopyData::CopyDataBase<dim> &data) const override;

        void
        create_additional_material_model_outputs(MaterialModel::MaterialModelOutputs<dim> &outputs) const override;
    };

    template <int dim>
    class StokesCompressibleStrainRateViscosityTermAnisotropicViscosity : public Assemblers::Interface<dim>,
      public SimulatorAccess<dim>
    {
      public:
        void
        execute(internal::Assembly::Scratch::ScratchBase<dim>   &scratch,
                internal::Assembly::CopyData::CopyDataBase<dim> &data) const override;
    };
  }
}


#endif