A Posteriori Error Estimation for a Defect-Correction Method Applied to Convection-Diffusion Problems
Year: 2010
International Journal of Numerical Analysis and Modeling, Vol. 7 (2010), Iss. 4 : pp. 718–733
Abstract
We consider a two-point boundary-value problem for a singularly
perturbed convection-diffusion problem. The problem is solved by using a
defect-correction method based on a first-order upwind difference scheme and
a second-order (unstabilized) central difference scheme.
A robust a posteriori error estimate in the maximum norm is derived. It
provides computable and guaranteed upper bounds for the discretization error.
Numerical examples are given that illustrate the theoretical findings and verify
the efficiency of the error estimator on a priori adapted meshes and in an
adaptive mesh movement algorithm.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/2010-IJNAM-748
International Journal of Numerical Analysis and Modeling, Vol. 7 (2010), Iss. 4 : pp. 718–733
Published online: 2010-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 16
Keywords: Convection-diffusion problems finite difference schemes defect correction a posteriori error estimation singular perturbation.