广西师范大学学报（自然科学版）2024，Vol.42Issue(4)：90-99,10.DOI:10.16088/j.issn.1001-6600.2023080803
基于格子Boltzmann方法的自由能密度模型
Free-Energy-Density Model Based on Lattice Boltzmann Method
摘要
Abstract
The multiphase flow model based on the lattice Boltzmann method has the advantages of automatic evolution of the phase interface and no boundary integration.It has been widely studied and applied in the simulation of complex multiphase fluid systems.In this paper,a multiphase flow model satisfying thermodynamic consistency and Galilean invariance is proposed by introducing the free energy density to calculate the interaction force between molecules.The results of using this model to predict the liquid-gas two-phase coexistence densities are in good agreement with theoretical values.At low temperatures,they are better than the improved pseudopotential model.At the same time,the model can also be used for the simulation of multi-phase flow systems with large density ratios.The model's compliance with Galilean invariance is verified by a series of numerical simulations such as speckle map and droplet impact on the liquid film.The model is physically clear and easy to implement,then,it can simulate multiphase flow systems with different equations of state,which has a better potential for practicality and application.关键词
格子Boltzmann方法/多相流/自由能模型/自由能密度/大密度比Key words
lattice Boltzmann method/multiphase flow/free energy model/free energy density/large density ratio分类
数理科学引用本文复制引用
李若桐,钟兴国,刘起霖,闻炳海..基于格子Boltzmann方法的自由能密度模型[J].广西师范大学学报（自然科学版）,2024,42(4):90-99,10.基金项目
国家自然科学基金(12272100) （12272100）
广西师范大学研究生创新项目(XYCSR2023021) （XYCSR2023021）
