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We investigate, for linear and higher-order elements, various ways of calculating the advective limit of the stabilization parameter (“ τ ”) used in the streamline-upwind/Petrov–Galerkin (SUPG) formulation of flow problems. In the context of a pure advection test problem, we compare the “UGN-based”, element-matrix-based, and element-node-based calculations of the advective limit of the τ . Our investigation shows that the performances of the “UGN-based” and element-matrix-based τ definitions are comparable, with the element-matrix-based definition yielding somewhat lower τ values. We also show that for both definitions, as the polynomial orders increase, the τ values decrease, as they should. |
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