Parameter uniform numerical method for singularly perturbed turning point problems exhibiting boundary layers

[摘要] This article presents a numerical method to solve singularly perturbed turning point problems exhibiting two exponential boundary layers. Classical finite-difference schemes do not yield parameter uniform convergent results on a uniform mesh, in general (Robust Computational Techniques for Boundary Layers, Chapman & Hall, London, CRC Press, Boca Raton, FL, 2000). In order to overcome this difficulty, we propose an appropriate piecewise uniforrn (Shishkin) mesh and apply the classical finite-difference schemes on this mesh. Error estimates are derived by decomposing the solution into smooth and singular components. The present method is layer resolving as well as parameter uniform convergent. Numerical examples are presented to show the applicability and efficiency of the method. (C) 2003 Elsevier B.V. All rights reserved.

[发布日期] 2003-09-01

[效力级别]  Proceedings Paper

[关键词] singularly perturbed turning point problems;boundary layer;asymptotic approximation;finite-difference schemes;piecewise uniform (Shishkin) mesh