Function sph

src/OpenFOAM/primitives/Tensor2D/Tensor2DI.H:260–263

//- Return the spherical part of a tensor
template<class Cmpt>
inline SphericalTensor2D<Cmpt> sph(const Tensor2D<Cmpt>& t)
{
    return 0.5*tr(t);
}


//- Return the symmetric part of a tensor