复杂气-液-固多相流动问题的介观格子Boltzmann方法

Mesoscopic lattice Boltzmann method for complex gas-liquid-solid flows

  • 摘要: 气-液-固多相流动问题广泛存在于能源、环境等众多领域,如何准确描述流体界面动力学、移动边界上的流-固相互作用以及接触线动力学是当前数值研究面临的三大关键挑战。近年来,介观格子Boltzmann方法(LBM)因其独特优势而被广泛应用于模拟复杂的多相流和流-固耦合问题,并受到了国内外学者的普遍关注。本文主要基于多相流模型的发展历程,并围绕上述关键难题,简要综述了气-液-固多相流动问题的LBM。本文首先介绍了气-液和流-固两相流动的LBM,随后基于不同类型的气-液两相LBM对气-液-固流动的LBM进行了论述,最后给出了一些经典多相流算例,并总结了现有模型的不足以及未来研究方向。

     

    Abstract: Gas-liquid-solid multiphase flow problems widely exist in many fields such as energy and environment, and how to accurately describe fluid interfacial dynamics, fluid-structure interaction on moving boundaries and contact line dynamics are three key challenges in current numerical research. In recent years, the lattice Boltzmann method (LBM) has been widely applied in the simulations of complex multiphase flows due to its special features, and has attracted the attention of many scholars. Based on the development of multiphase flow model and the above key issues, this paper brief reviews the LBMs for gas-liquid-solid flows. We first present the LBMs for gas-liquid and fluid-solid two-phase flows, and then introduce the LBMs for gas-liquid-solid flows based on the categories of gas-liquid two-phase flows. Finally, several classical test problems of multiphase flows are discussed, and the shortcomings of the existing models as well as some future development directions are summarized.

     

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