A compact five-point stencil based on integrated RBFs for 2D second-order differential problems
Article
Article Title | A compact five-point stencil based on integrated RBFs for 2D second-order 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 | 235, pp. 302-321 |
Number of Pages | 20 |
Year | 2013 |
Place of Publication | Maryland Heights, MO. United States |
ISSN | 0021-9991 |
1090-2716 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jcp.2012.10.048 |
Abstract | In this paper, a compact 5-point stencil for the discretisation of second-order partial differential equations (PDEs) in two space dimensions is proposed. We employ integrated radial basis functions in one dimension (1D-IRBFs)to construct the approximations for the dependent variable and its derivatives over the three nodes in each direction of the stencil. Certain nodal values of the second-order derivatives are incorporated into the approximations with help of the integration constants. In the case of elliptic PDEs, one algebraic equation if formed at each interior node, and the obtained final system, of which each row has 5 non-zero entries, is solved iteratively using a Picard scheme. In the case of parabolic PDEs discretised with a Crank Nicolson procedure, a set of three simultaneous algebraic equations is established at each interior node and the three equations through the implicit elimination approach. Linear and non-linear test problems, including lid-driven cavity flow and natural convection between the outer square and in the inner cylinder, are considered to verify the proposed stencil. |
Keywords | compact local approximations; high-order approximations; elliptic PDEs; parabolic PDEs; integrated radial basis functions |
ANZSRC Field of Research 2020 | 490303. Numerical solution of differential and integral equations |
490101. Approximation theory and asymptotic methods | |
Public Notes | © 2012 Elsevier Inc. Published version restricted in accordance with the copyright policy of the publisher. |
Byline Affiliations | Computational Engineering and Science Research Centre |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q256x/a-compact-five-point-stencil-based-on-integrated-rbfs-for-2d-second-order-differential-problems
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