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An Adaptive Grid Method for Singularly Perturbed Time-Dependent Convection-Diffusion Problems

Published online by Cambridge University Press:  02 November 2016

Yanping Chen*
Affiliation:
School of Mathematical Sciences, South China Normal University, Guangzhou 510631, China
Li-Bin Liu
Affiliation:
School of Mathematics and Computer, Chizhou University, Chizhou, Anhui 247000, China
*
*Corresponding author. Email address:[email protected] (Y. Chen)
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Abstract

In this paper, we study the numerical solution of singularly perturbed time-dependent convection-diffusion problems. To solve these problems, the backward Euler method is first applied to discretize the time derivative on a uniform mesh, and the classical upwind finite difference scheme is used to approximate the spatial derivative on an arbitrary nonuniform grid. Then, in order to obtain an adaptive grid for all temporal levels, we construct a positive monitor function, which is similar to the arc-length monitor function. Furthermore, the ε-uniform convergence of the fully discrete scheme is derived for the numerical solution. Finally, some numerical results are given to support our theoretical results.

Type
Research Article
Copyright
Copyright © Global-Science Press 2016 

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