A parameter robust numerical method for a two dimensional reaction-diffusion problem

Clavero, C.; Gracia, J.; O’Riordan, E.

doi:10.1090/S0025-5718-05-01762-X

A parameter robust numerical method for a two dimensional reaction-diffusion problem
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by C. Clavero, J. L. Gracia and E. O’Riordan PDF

Math. Comp. 74 (2005), 1743-1758 Request permission

Abstract:

In this paper a singularly perturbed reaction-diffusion partial differential equation in two space dimensions is examined. By means of an appropriate decomposition, we describe the asymptotic behaviour of the solution of problems of this kind. A central finite difference scheme is constructed for this problem which involves an appropriate Shishkin mesh. We prove that the numerical approximations are almost second order uniformly convergent (in the maximum norm) with respect to the singular perturbation parameter. Some numerical experiments are given that illustrate in practice the theoretical order of convergence established for the numerical method.

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