AdvectionSystem.h

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///////////////////////////////////////////////////////////////////////////////
//
// File: AdvectionSystem.h
//
// For more information, please see: http://www.nektar.info
//
// The MIT License
//
// Copyright (c) 2006 Division of Applied Mathematics, Brown University (USA),
// Department of Aeronautics, Imperial College London (UK), and Scientific
// Computing and Imaging Institute, University of Utah (USA).
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
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// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included
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//
// Description: Advection system
//
///////////////////////////////////////////////////////////////////////////////
 
#ifndef NEKTAR_SOLVERUTILS_ADVECTIONSYSTEM_H
#define NEKTAR_SOLVERUTILS_ADVECTIONSYSTEM_H
 
#include <SolverUtils/Advection/Advection.h>
#include <SolverUtils/UnsteadySystem.h>
 
namespace Nektar
{
namespace SolverUtils
{
 
/// A base class for PDEs which include an advection component
class AdvectionSystem : virtual public UnsteadySystem
{
public:
    SOLVER_UTILS_EXPORT AdvectionSystem(
        const LibUtilities::SessionReaderSharedPtr &pSession,
        const SpatialDomains::MeshGraphSharedPtr &pGraph);
 
    SOLVER_UTILS_EXPORT virtual ~AdvectionSystem();
 
    SOLVER_UTILS_EXPORT virtual void v_InitObject(
        bool DeclareField = true) override;
 
    /// Returns the advection object held by this instance.
    SOLVER_UTILS_EXPORT AdvectionSharedPtr GetAdvObject()
    {
        return m_advObject;
    }
 
    SOLVER_UTILS_EXPORT Array<OneD, NekDouble> GetElmtCFLVals(
        const bool FlagAcousticCFL = true);
    SOLVER_UTILS_EXPORT NekDouble GetCFLEstimate(int &elmtid);
 
protected:
    /// Advection term
    SolverUtils::AdvectionSharedPtr m_advObject;
 
    SOLVER_UTILS_EXPORT virtual bool v_PostIntegrate(int step) override;
 
    SOLVER_UTILS_EXPORT virtual Array<OneD, NekDouble> v_GetMaxStdVelocity(
        const NekDouble SpeedSoundFactor = 1.0)
    {
        boost::ignore_unused(SpeedSoundFactor);
        ASSERTL0(false,
                 "v_GetMaxStdVelocity is not implemented by the base class.");
        Array<OneD, NekDouble> dummy(1);
        return dummy;
    }
 
private:
    /// dump cfl estimate
    int m_cflsteps;
    /// Write field if cfl is higher than IO_CFLWriteFld treshold
    NekDouble m_cflWriteFld;
    /// Number of timesteps after which IO_CFLWriteFld is activated
    int m_cflWriteFldWaitSteps;
};
 
/// Shared pointer to an AdvectionSystem class
typedef std::shared_ptr<AdvectionSystem> AdvectionSystemSharedPtr;
 
} // namespace SolverUtils
} // namespace Nektar
 
#endif