Lattice Boltzmann simulations of sedimentation of a single fiber in a weak vertical shear flow

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Lattice Boltzmann simulations of sedimentation of a single fiber in a weak vertical shear flow
	Qi DW; He GW(何国威); Liu YM
刊名	PHYSICS OF FLUIDS
	2013-09-18
通讯作者邮箱	hgw@lnm.imech.ac.cn
卷号	25 期号:9 页码:093302/1-093302/14
关键词	Aspect ratio Fibers Reynolds number Suspensions (fluids) Cross-stream migration Dilute suspensions Finite Reynolds number Lattice Boltzmann simulations Nonspherical particle Particle aspect ratios Particle suspensions
ISSN号	1070-6631
通讯作者	Qi, DW (reprint author), Western Michigan Univ, Dept Chem & Paper Engn, Kalamazoo, MI 49009 USA.
产权排序	[Qi, Dewei] Western Michigan Univ, Dept Chem & Paper Engn, Kalamazoo, MI 49009 USA; [He, Guowei] Chinese Acad Sci, Inst Mech, Stake Key Lab Nonlinear Mech, Beijing 100080, Peoples R China; [Liu, Yingming] Sichuan Univ, Yangtze Ctr Math, Chengdu 610064, Peoples R China
合作状况	国际
中文摘要	Instability of a suspension is directly related to the problem of the cross-stream migration of a particle relative to its neighboring particle suspension. Such cross-stream or lateral migration of a single non-spherical particle (fiber) settling in a bounded weak shear flow with vertical streamlines produced by a perturbation to the fiber number density is studied using lattice Boltzmann simulations. The present simulation results demonstrate that at a given shear rate, the lateral migration can be divided into three phases depending on settling Reynolds number R-sd and particle aspect ratio kappa. At a low settling Reynolds number R-sd, the suspension becomes more stable in phase 1. As R-sd increases and excesses a critical settling Reynolds number R-sd1, the fiber suspension becomes unstable in phase 2. In phase 3, at an enough large R-sd, the inertia dominates the weak shear flow and it may have little effect on stability. A mechanism of the instability induced by an inertial fiber orientation drift and a shear induced cross-streamline drift, recently proposed by Shin, Koch, and Subramanian ["Structure and dynamics of dilute suspensions of finite reynolds number settling fibers," Phys. Fluids 21, 123304 (2009)], is examined and confirmed.
学科主题	流体力学
分类号	一类/力学重要期刊
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1063/1.4821775
语种	英语
WOS记录号	WOS:000325397800041
公开日期	2013-11-18
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/47530]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Qi DW,He GW,Liu YM. Lattice Boltzmann simulations of sedimentation of a single fiber in a weak vertical shear flow[J]. PHYSICS OF FLUIDS,2013,25(9):093302/1-093302/14.
APA	Qi DW,何国威,&Liu YM.(2013).Lattice Boltzmann simulations of sedimentation of a single fiber in a weak vertical shear flow.PHYSICS OF FLUIDS,25(9),093302/1-093302/14.
MLA	Qi DW,et al."Lattice Boltzmann simulations of sedimentation of a single fiber in a weak vertical shear flow".PHYSICS OF FLUIDS 25.9(2013):093302/1-093302/14.