freeflow/navierstokes/momentum/indices.hh

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#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