Revista Facultad de Ingeniería Universidad de Antioquia
Print version ISSN 0120-6230
GALEANO, Carlos Humberto; GARZON, Diego Alexander and MANTILLA, Juan Miguel. A comparison between characteristic lines and streamline upwind Petrov-Galerkin method for advection dominated problems. Rev.fac.ing.univ. Antioquia [online]. 2010, n.52, pp. 134-146. ISSN 0120-6230.
This article develops numerically the advection-diffusion equation problem, using Galerkin on characteristic lines and Streamline Upwind Petrov- Galerkin (SUPG) methods. The dominated advective conditions in the solved problem showed that for cases where high Peclet numbers are encountered, characteristic lines don’t achieve a stable solution, as SUPG does. Nevertheless, for low Peclet numbers, characteristic lines achieve stabilized results and total energy norm errors slightly lower to SUPG’s. Convergence figures depicts that L2 energy norm error in the solution by finite elements or Bubnov-Galerkin, is very similar to the error found with characteristic lines method.
Keywords : Petrov-Galerkin; characteristic lines; SUPG; advection; diffusion.