freeflow/navierstokes/momentum/indices.hh

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
//
// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
// SPDX-License-Identifier: GPL-3.0-or-later
//
#ifndef DUMUX_NAVIERSTOKES_MOMENTUM_INDICES_HH
#define DUMUX_NAVIERSTOKES_MOMENTUM_INDICES_HH
 
namespace Dumux {
 
template <int dimension>
struct NavierStokesMomentumIndices // TODO specialize for staggered / diamond / etc
{
    static constexpr int dimXIdx = 0; 
    static constexpr int dimYIdx = 1; 
    static constexpr int dimZIdx = 2; 
 
    static constexpr auto dim = dimension;
 
    static constexpr int momentumXBalanceIdx = 0; 
    static constexpr int momentumYBalanceIdx = 1; 
    static constexpr int momentumZBalanceIdx = 2; 
 
    static constexpr int velocityXIdx = 0; 
    static constexpr int velocityYIdx = 1; 
    static constexpr int velocityZIdx = 2; 
 
    static constexpr int velocity(int dirIdx)
    {
        return dirIdx;
    }
 
    static constexpr int momentumBalanceIdx(int dirIdx)
    {
        return dirIdx;
    }
};
 
} // end namespace Dumux
 
#endif