In this paper the functions of the Péclet number that appear in the intrinsic time of the streamline upwind/Petrov-Galerkin (SUPG) formulation are analyzed for quadratic elements. Some related issues such as the computation of the characteristic element length and the introduction of source terms in the one-dimensional model problem are also addressed.
Codina, R.; Oñate, E.; Cervera, M. The intrinsic time for the streamline upwind/Petrov-Galerkin formulation using quadratic elements. "Computer methods in applied mechanics and engineering", Gener 1992, vol. 94, núm. 2, p. 239-262.