Compact local integrated-RBF approximations for second-order elliptic differential problems
Article
Article Title | Compact local integrated-RBF approximations for second-order elliptic differential problems |
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ERA Journal ID | 35103 |
Article Category | Article |
Authors | Mai-Duy, N. (Author) and Tran-Cong, T. (Author) |
Journal Title | Journal of Computational Physics |
Journal Citation | 230 (12), pp. 4772-4794 |
Number of Pages | 23 |
Year | 2011 |
Place of Publication | Maryland Heights, MO, United States |
ISSN | 0021-9991 |
1090-2716 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jcp.2011.03.002 |
Web Address (URL) | http://www.sciencedirect.com/science/article/pii/S0021999111001355 |
Abstract | This paper presents a new compact approximation method for the discretisation of second-order elliptic equations in one and two dimensions. The problem domain, which can be rectangular or non-rectangular, is represented by a Cartesian grid. On stencils, which are three nodal points for one-dimensional problems and nine nodal points for two-dimensional problems, the approximations for the field variable and its derivatives are constructed using integrated radial basis functions (IRBFs). Several pieces of information about the governing differential equation on the stencil are incorporated into the IRBF approximations by means of the constants of integration. Numerical examples indicate that the proposed technique yields a very high rate of convergence with grid refinement. |
Keywords | compact local approximations; elliptic problems; high-order approximations; integrated radial basis functions |
ANZSRC Field of Research 2020 | 490303. Numerical solution of differential and integral equations |
490101. Approximation theory and asymptotic methods | |
401706. Numerical modelling and mechanical characterisation | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Computational Engineering and Science Research Centre |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q0x87/compact-local-integrated-rbf-approximations-for-second-order-elliptic-differential-problems
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