Convergence Analysis of the LDG Method Applied to Singularly Perturbed Problems
Mathematics and Natural Sciences
Considering a two-dimensional singularly perturbed convectiondiffusion problem with exponential boundary layers, we analyze the local discontinuous Galerkin (DG) method that uses piecewise bilinear polynomials on Shishkin mesh. A convergence rate O(N-1 lnN) in a DG-norm is established under the regularity assumptions, while the total number of mesh points is O(N2). The rate of convergence is uniformly valid with respect to the singular perturbation parameter epsilon. Numerical experiments indicate that the theoretical error estimate is sharp. (C) 2012 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq 2013
Numerical Methods for Partial Differential Equations
(2013). Convergence Analysis of the LDG Method Applied to Singularly Perturbed Problems. Numerical Methods for Partial Differential Equations, 29(2), 396-421.
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