Year: 2023
Author: Moussa Ziggaf, Imad Kissami, Mohamed Boubekeur, Fayssal Benkhaldoun
Advances in Applied Mathematics and Mechanics, Vol. 15 (2023), Iss. 5 : pp. 1335–1378
Abstract
This paper aims to present a new well-balanced, accurate and fast finite
volume scheme on unstructured grids to solve hyperbolic conservation laws. It is a
scheme that combines both finite volume approach and characteristic method. In this
study, we consider a shallow water system with Coriolis effect and bottom friction
stresses where this new Finite Volume Characteristics (FVC) scheme has been applied.
The physical and mathematical properties of the system, including the C-property,
have been well preserved.
First, we developed this approach by preserving the advantages of the finite volume discretization such as conservation property and the method of characteristics, in
order to avoid Riemann solvers and to enhance the accuracy without any complexity
of the MUSCL reconstruction. Afterward, a discretization was applied to the bottom
source term that leads to a well-balanced scheme satisfying the steady-state condition
of still water. A semi-implicit treatment will also be presented in this study to avoid
stability problems due to source terms. Finally, the proposed finite volume method is
verified on several benchmark tests and shows good agreement with analytical solutions and experimental results; moreover, it gives a noteworthy accuracy and rapidity
improvement compared to the original approaches.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/aamm.OA-2022-0113
Advances in Applied Mathematics and Mechanics, Vol. 15 (2023), Iss. 5 : pp. 1335–1378
Published online: 2023-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 44
Keywords: Shallow water model method of characteristics FVC scheme finite volume method well-balanced scheme.
Author Details
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