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Regularized phase-field lattice Boltzmann model for multiphase flow based on the well-balanced model
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更新：2025-04-10 21:18:58 浏览：6次
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摘要
The lattice Boltzmann method for multiphase flow simulations faces challenges such as excessive interfacial spurious velocities, numerical instability with large density ratios, and difficulty in capturing system equilibrium. In 2023, Ju [1] introduced the well-balanced (WB) model into the phase-field lattice Boltzmann framework, enabling accurate capture of the physical equilibrium state of two-phase fluid systems. This innovation reduces interfacial spurious velocities in stationary states to near machine error levels and achieves a divergence-free velocity field, thereby mitigating artificial compressibility effects and enhancing numerical stability. Building on this foundation, the present study conducts a comprehensive Chapman-Enskog (CE) expansion analysis and develops a regularized phase-field lattice Boltzmann model within the WB framework. The investigation focuses on equilibrium characteristics following phase interface changes under narrower interface thickness conditions and the model's capability to accurately simulate static contact angles. Current research demonstrates that the regularized model maintains high accuracy in both stationary and dynamic interface states, as well as static contact angle simulations, by suppressing higher-order moments. Furthermore, it exhibits improved numerical stability compared to conventional approaches. This work contributes to advancing the phase-field lattice Boltzmann method by addressing critical challenges and improving its reliability and performance in multiphase flow simulations.
关键词
Lattice Boltzmann Methods,Multiphase Flow,Regularized model
报告人
Hongzhuo Yu
student Northwestern Polytechnical University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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