A numerical study of 2D integrated RBFNs incorporating Cartesian grids for solving 2D elliptic differential problems
Article
Article Title | A numerical study of 2D integrated RBFNs incorporating Cartesian grids for solving 2D elliptic differential problems |
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ERA Journal ID | 344 |
Article Category | Article |
Authors | Mai-Duy, Nam (Author) and Tran-Cong, Thanh (Author) |
Journal Title | Numerical Methods for Partial Differential Equations |
Journal Citation | 26 (6), pp. 1443-1462 |
Number of Pages | 20 |
Year | 2010 |
Place of Publication | Hoboken, NJ. United States |
ISSN | 0749-159X |
1098-2426 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/num.20502 |
Web Address (URL) | https://onlinelibrary.wiley.com/doi/10.1002/num.20502 |
Abstract | This article reports a numerical discretization scheme, based on two-dimensional integrated radial-basis-function networks (2D-IRBFNs) and rectangular grids, for solving second-order elliptic partial differential equations defined on 2D nonrectangular domains. Unlike finite-difference and 1D-IRBFN Cartesian-grid techniques, the present discretization method is based on an approximation scheme that allows the field variable and its derivatives to be evaluated anywhere within the domain and on the boundaries, regardless of the shape of the problem domain. We discuss the following two particular strengths, which the proposed Cartesian-grid-based procedure possesses, namely (i) the implementation of Neumann boundary conditions on irregular boundaries and (ii) the use of high-order integration schemes to evaluate flux integrals arising from a control-volume discretization on irregular domains. A new preconditioning scheme is suggested to improve the 2D-IRBFN matrix condition number. Good accuracy and high-order convergence solutions are obtained. |
Keywords | integrated radial basis function network; Cartesian grid; irregular domain; Neumann boundary condition; control-volume discretisation; point-collocation discretisation |
ANZSRC Field of Research 2020 | 490303. Numerical solution of differential and integral equations |
401706. Numerical modelling and mechanical characterisation | |
490404. Combinatorics and discrete mathematics (excl. physical combinatorics) | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Computational Engineering and Science Research Centre |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q0771/a-numerical-study-of-2d-integrated-rbfns-incorporating-cartesian-grids-for-solving-2d-elliptic-differential-problems
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