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Orthogonal surface-normal gradient scheme

The vector d\vec{d} joining two cell centres is parallel to the normal direction of the inter-connecting face.

∇f⊥Q=QP−QN∣d∣ \snGrad Q = \frac{Q_P - Q_N}{| \vec{d} |}

Schematic

Properties​

  • Calculated using a central difference scheme using the mesh delta coefficients
  • Any non-orthogonality is ignored

Usage​

The scheme is specified using:

snGradSchemes
{
    default         none;
    snGrad(Q)       orthogonal;
}

Further information​

Source code