Liutex-based analysis of drag force and vortex in two-phase flow past 2-D square obstacle using LBM on GPU
作者机构：Institute of Nuclear and New Energy TechnologyCollaborative Innovation Center of Advanced Nuclear Energy TechnologyKey Laboratory of Advanced Reactor Engineering and Safety of Ministry of EducationTsinghua UniversityBeijing 100084China School of EngineeringRMIT UniversityMelbourneAustralia
出 版 物：《Journal of Hydrodynamics》 (水动力学研究与进展B辑（英文版）)
年 卷 期：2020年第32卷第5期
页 面：820-833页
核心收录：
学科分类：08[工学] 080103[工学-流体力学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：supported by the National Science and Technology Major Project(Grant No.2011ZX06901-003) the National Natural Science Foundations of China(Grant No.51576211) the National High Technology Research and Development Program of China(863 Program)(Grant No.2014AA052701).
主 题：Two-phase flow flow past a square lattice Boltzmann method(LBM) vortex identification Liutex two-phase drag
摘 要：The two-phase flow past a square is a ubiquitous phenomenon widely encountered in industries and engineering,where the interaction of disparate phases coupled with the influence of the solid is rather complicated.In this context,the flow characteristics and the vortex field are investigated to reveal the mechanisms of the two-phase drag and the vortex variation.The lattice Boltzmann method(LBM)is utilized to study the multi-component two-phase flow.The computation implemented on the GPU is remarkably accelerated thanks to the natural parallelism of the LBM.The process of the two-phase flow past a square is thoroughly examined.The drag and lift forces,including the total force and the components caused by the dispersed phase and the continuous phase,respectively,are obtained,and their variation mechanisms are explained.Meanwhile,the vortex-identification approaches based on the Liutex as well as the traditional methods are compared.The relationship between the bubble breakup and coalescence processes and the extremums of different vortex identification variables is analyzed.
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