A point-collocation method based on integrated Chebyshev polynomials for elliptic differential equations in irregular domains

Mai-Duy, Nam and Tran-Cong, Thanh (2008) A point-collocation method based on integrated Chebyshev polynomials for elliptic differential equations in irregular domains. In: 8th World Congress on Computational Mechanics (WCCM8) and 5th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2008), 30 June - 4 July 2008, Venice, Italy.

Abstract

[Abstract]: This paper describes a numerical approach for elliptic partial differential equations based on integrated Chebyshev polynomials and point collocation. In this approach, the starting points of the approximation process are the highest derivatives of the field variables in the given partial differential equations. Lower derivatives, and eventually the variables themselves, are symbolically obtained by integration, giving rise to integration constants that serve as additional expansion coefficients, and therefore facilitate the employment of some extra equations. It is shown that this feature provides an effective way to handle the description of non-rectangular boundaries in Cartesian grids. As a result, there is no need to transform an irregular domain into a regular one and the governing equations remain in the simple Cartesian form. In addition, the use of integration also improves the quality of the approximation of derivative functions owing to its smoothness and stability.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Awaiting copyright advice.
Depositing User: Dr Nam Mai-Duy
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 22 May 2009 04:01
Last Modified: 15 Oct 2014 02:08
Uncontrolled Keywords: Chebyshev polynomials, Integral collocation formulation, Complex geometries
Fields of Research (FOR2008): 01 Mathematical Sciences > 0103 Numerical and Computational Mathematics > 010302 Numerical Solution of Differential and Integral Equations
09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
URI: http://eprints.usq.edu.au/id/eprint/4583

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