计算力学学报2016，Vol.33Issue(6)：895-904,10.DOI:10.7511/jslx201606015
双颗粒沉降的动力学分析
Dynamic analysis of two settling particles in a channel
摘要
Abstract
The lattice Boltzmann‐direct forcing/fictitious method has been used to simulate the sedimenta‐tion of two particles in a channel for the Reynolds number of 50≤ Re ≤200 .First of all ,it has been shown that the two particles eventually sedimenting at 1/4 and 3/4 of channel width ,respectively ,irre‐spective of initial particle distance ,Reynolds numbers and channel width .Secondly ,the lateral forces (perpendicular to gravity ) experienced by the particles are examined in detail .It has been found that the frequency of the lateral forces increases quadratically with increased Reynolds number .Furthermore ,the frequency of single‐particle system is always smaller than that of two‐particle system .The significant power‐law relationship between the frequency and the channel width has also been found through numer‐ical simulations .The power‐law exponent depends on the Reynolds number .The larger the Reynolds number is ,the smaller the absolute value of the exponent is .Moreover ,the influence of the Reynolds number and channel width on the amplitude of the lateral forces is also studied in this work .关键词
颗粒沉降/动力学分析/格子Boltzmann方法/虚拟区域方法Key words
particle sedimentation/dynamic analysis/lattice Boltzmann method/fictitious domain scheme分类
数理科学引用本文复制引用
陈荣前,聂德明..双颗粒沉降的动力学分析[J].计算力学学报,2016,33(6):895-904,10.基金项目
国家自然科学基金（11272302）；浙江省自然科学基金（LY15A020004）资助项目． （）
