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A pure one-side diffuse-interface immersed boundary-lattice Boltzmann method for compressible flows
编号：32
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更新：2025-04-11 10:09:56 浏览：21次
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报告时间：暂无持续时间
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摘要
The aim of this study is to develop an efficient diffuse-interface immersed boundary-lattice Boltzmann method to investigate the fluid-structure interaction in compressible flows, especially for flow configurations involving shocks. Inspired by the works of [1, 2], a pure one-side diffuse-interface immersed boundary method is proposed, where interpolation and spreading are performed only on the interior of the solid. This method is found to give a sharper and more accurate description of the boundary without loss of robustness compared to the standard diffuse-interface immersed boundary method. A scaling factor is defined to satisfy the equality between the Eulerian and Lagrangian variables in the interpolation and spreading steps. In addition, a new expression of the Lagrangian weight is proposed to guarantee the reciprocity of the interpolation and spreading operators, which is an explicit analytical approximation of the implicit immersed boundary correction, based on the formulation proposed in [3, 4]. This weight drastically reduces the boundary error while its computational cost is negligible. The accuracy of the present numerical method is validated with various test cases of increasing complexity. The results are compared with those of the body-fitted methods and a good agreement is observed.
关键词
Immersed boundary method,Lattice Boltzmann Method,Compressible Flows
报告人
Jian eduardo CARDENAS CABEZAS
PhD student M2P2稿件作者
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重要日期
-
会议日期
07月03日
2025
至07月06日
2025
-
06月25日 2025
初稿截稿日期
主办单位
Harbin Engineering University, China
承办单位
Harbin Engineering University, China
联系方式
- Li Xu Hui
- li******@hrbeu.edu.cn
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