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Applicable Analysis
An International Journal
Volume 87, 2008 - Issue 7
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Original Articles

Compatible wavelet-Galerkin method to solve stokes interior problem with circular boundary

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Pages 755-772 | Received 04 Apr 2008, Accepted 10 Jun 2008, Published online: 29 Sep 2008
 

Abstract

This article addresses Neumann boundary value interior problem of Stokes equations with circular boundary. By using natural boundary element method, the Stokes interior problem is reduced into an equivalent natural integral equation with a hyper-singular kernel, which is viewed as Hadamard finite part. Based on trigonometric wavelet functions, the compatible wavelet space is constructed so that it can serve as Galerkin trial function space. In proposed compatible wavelet-Galerkin method, the simple and accurate computational formulae of the entries in stiffness matrix are obtained by singularity removal technique. It is also proved that the stiffness matrix is almost a block diagonal matrix, and its diagonal sub-blocks all are both symmetric and circulant submatrices. These good properties indicate that a 2 J+3 × 2 J+3 stiffness matrix can be determined only by its 2 J + 3J + 1 entries. It greatly decreases the computational complexity. Some error estimates for the compatible wavelet-Galerkin projection solutions are established. Finally, several numerical examples are given to demonstrate the validity of the proposed approach.

Acknowledgement

This work was partially supported by NSF of China (60373082) and NSF of Guangdong Province (06105776).

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