A time discretization scheme based on integrated radial basis functions for heat transfer and fluid flow problems
Article
Article Title | A time discretization scheme based on integrated radial basis functions for heat transfer and fluid flow problems |
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ERA Journal ID | 3805 |
Article Category | Article |
Authors | Le, T. T. V. (Author), Mai-Duy, N. (Author), Le-Cao, K. (Author) and Tran-Cong, T. (Author) |
Journal Title | Numerical Heat Transfer Part B: Fundamentals |
Journal Citation | 74 (2), pp. 498-518 |
Number of Pages | 21 |
Year | 2018 |
Publisher | Taylor & Francis |
Place of Publication | Philadelphia, PA, United States |
ISSN | 1040-7790 |
1521-0626 | |
Digital Object Identifier (DOI) | https://doi.org/10.1080/10407790.2018.1515329 |
Abstract | This paper reports a new numerical procedure, which is based on integrated radial basis functions (IRBFs) and Cartesian grids, for solving time-dependent differential problems that can be defined on non-rectangular domains. For space discretisations, compact five-point IRBF stencils [Journal of Computational Physics, vol. 235, pp. 302-321, 2013] are utilised. For time discretisations, a two-point IRBF scheme is proposed, where the time derivative is approximated in terms of not only nodal function values at the current and previous time levels but also nodal derivative values at the previous time level. This allows functions other than a linear one to also be captured well on a time step. The use of the RBF width as an additional parameter to enhance the approximation quality with respect to time is also explored. Various kinds of test problems of heat transfer and fluid flows are conducted to demonstrate attractiveness of the present compact approximations. |
Keywords | time discretisations; integrated radial basis functions; compact approximations; heat transfer and fluid flows |
ANZSRC Field of Research 2020 | 490303. Numerical solution of differential and integral equations |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Computational Engineering and Science Research Centre |
National University of Singapore | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5056/a-time-discretization-scheme-based-on-integrated-radial-basis-functions-for-heat-transfer-and-fluid-flow-problems
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