Inertial focusing and rotating characteristics of elliptical and rectangular particle pairs in channel flow  

作　　者：Pei-Feng Lin Xiao Hu Jian-Zhong Lin 林培锋;胡箫;林建忠(Key Laboratory of Fluid Transmission Technology of Zhejiang Province,Zhejiang Sci-Tech University,Hangzhou 310018,China;Department of Mechanics,State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]Key Laboratory of Fluid Transmission Technology of Zhejiang Province,Zhejiang Sci-Tech University,Hangzhou 310018,China [2]Department of Mechanics,State Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou 310027,China

出　　处：《Chinese Physics B》2022年第8期266-272,共7页中国物理B（英文版）

基　　金：Project supported by the Major Program of the National Natural Science Foundation of China(Grant No.12132015);the Natural Science Foundation of Zhejiang Province,China(Grant No.LQ22A020008);the Key Research and Development Program of Zhejiang Province,China(Grant No.2020C03081)。

摘　　要：The lattice Boltzmann method is used to study the inertial focusing and rotating characteristics of two-dimensional elliptical particles and rectangular particles in channel flow. The results show that both elliptical particles and rectangular particles initially located on one side and two sides of channel centerline migrate first towards the equilibrium position.Then, the single-line particle train with an increasing spacing and the staggered particle train with stable spacing are formed. The axial spacing of the staggered particle pair increases with aspect ratio and Reynolds number increasing. The staggered elliptical or rectangular particle pairs form perpendicular orientation angles, which will be more obvious at larger aspect ratio and lower Reynolds number. The single-line particle trains with different shapes seldom form the perpendicular orientation angle.

关 键 词：lattice Boltzmann method particle trains self-organization inertial migration particle shape 

分 类 号：O572.2[理学—粒子物理与原子核物理]