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Subdomain radial basis collocation method for heterogeneous media

✍ Scribed by Jiun-Shyan Chen; Lihua Wang; Hsin-Yun Hu; Sheng-Wei Chi

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
325 KB
Volume
80
Category
Article
ISSN
0029-5981

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✦ Synopsis

Abstract

Strong form collocation in conjunction with radial basis approximation functions offer implementation simplicity and exponential convergence in solving partial differential equations. However, the smoothness and nonlocality of radial basis functions pose considerable difficulties in solving problems with local features and heterogeneity. In this work, we propose a simple subdomain strong form collocation method, in which the approximation in each subdomain is constructed separately. Proper interface conditions are then imposed on the interface. Under the subdomain strong form collocation construction, it is shown that both Neumann and Dirichlet boundary conditions should be imposed on the interface to achieve the optimum convergence. Error analysis and numerical tests consistently confirm the need to impose the optimal interface conditions. The performance of the proposed methods in dealing with heterogeneous media is also validated. Copyright Β© 2009 John Wiley & Sons, Ltd.

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