RiemannInvariantBC.h

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///////////////////////////////////////////////////////////////////////////////
//
// File: RiemannInvariantBC.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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// Software is furnished to do so, subject to the following conditions:
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// Description: Riemann invariant boundary condition
//
///////////////////////////////////////////////////////////////////////////////
 
#ifndef NEKTAR_SOLVERS_COMPRESSIBLEFLOWSOLVER_BNDCOND_RIEMANNINVARIANTBC
#define NEKTAR_SOLVERS_COMPRESSIBLEFLOWSOLVER_BNDCOND_RIEMANNINVARIANTBC
 
#include "CFSBndCond.h"
 
namespace Nektar
{
 
/**
 * @brief Outflow characteristic boundary conditions for compressible
 * flow problems.
 */
class RiemannInvariantBC : public CFSBndCond
{
public:
    friend class MemoryManager<RiemannInvariantBC>;
 
    /// Creates an instance of this class
    static CFSBndCondSharedPtr create(
        const LibUtilities::SessionReaderSharedPtr &pSession,
        const Array<OneD, MultiRegions::ExpListSharedPtr> &pFields,
        const Array<OneD, Array<OneD, NekDouble>> &pTraceNormals,
        const Array<OneD, Array<OneD, NekDouble>> &pGridVelocity,
        const int pSpaceDim, const int bcRegion, const int cnt)
    {
        CFSBndCondSharedPtr p =
            MemoryManager<RiemannInvariantBC>::AllocateSharedPtr(
                pSession, pFields, pTraceNormals, pGridVelocity, pSpaceDim,
                bcRegion, cnt);
        return p;
    }
 
    /// Name of the class
    static std::string className;
 
protected:
    void v_Apply(Array<OneD, Array<OneD, NekDouble>> &Fwd,
                 Array<OneD, Array<OneD, NekDouble>> &physarray,
                 const NekDouble &time) override;
 
    /// Reference normal velocity
    Array<OneD, NekDouble> m_VnInf;
 
private:
    RiemannInvariantBC(
        const LibUtilities::SessionReaderSharedPtr &pSession,
        const Array<OneD, MultiRegions::ExpListSharedPtr> &pFields,
        const Array<OneD, Array<OneD, NekDouble>> &pTraceNormals,
        const Array<OneD, Array<OneD, NekDouble>> &pGridVelocity,
        const int pSpaceDim, const int bcRegion, const int cnt);
 
    ~RiemannInvariantBC(void) override{};
};
 
} // namespace Nektar
 
#endif