Journal of Scientific Computing

, Volume 43, Issue 1, pp 24–43

Numerical Studies of Adaptive Finite Element Methods for Two Dimensional Convection-Dominated Problems

Authors

    • Department of Mathematical SciencesUniversity of Nevada, Las Vegas
  • Long Chen
    • Department of MathematicsUniversity of California, Irvine
  • Jinchao Xu
    • Department of MathematicsPennsylvania State University
Article

DOI: 10.1007/s10915-009-9337-6

Cite this article as:
Sun, P., Chen, L. & Xu, J. J Sci Comput (2010) 43: 24. doi:10.1007/s10915-009-9337-6

Abstract

In this paper, we study the stability and accuracy of adaptive finite element methods for the convection-dominated convection-diffusion-reaction problem in the two-dimension space. Through various numerical examples on a type of layer-adapted grids (Shishkin grids), we show that the mesh adaptivity driven by accuracy alone cannot stabilize the scheme in all cases. Furthermore the numerical approximation is sensitive to the symmetry of the grid in the region where the solution is smooth. On the basis of these two observations, we develop a multilevel-homotopic-adaptive finite element method (MHAFEM) by combining streamline diffusion finite element method, anisotropic mesh adaptation, and the homotopy of the diffusion coefficient. We use numerical experiments to demonstrate that MHAFEM can efficiently capture boundary or interior layers and produce accurate solutions.

Convection-dominated convection-diffusion-reaction problem Layer-adapted Shishkin grids Streamline diffusion finite element Anisotropic adaptive mesh Multilevel homotopic adaptive finite element method

Copyright information

© Springer Science+Business Media, LLC 2009