Drafting, kissing and tumbling process of two particles with different   sizes

doi:10.1016/j.compfluid.2014.03.005

CORC > 北京大学 > 工学院

	Drafting, kissing and tumbling process of two particles with different sizes
	Wang, L. ; Guo, Z. L. ; Mi, J. C.
刊名	computers fluids
	2014
关键词	Sedimentation Lattice Boltzmann method Drafting, kissing and tumbling phenomenon LATTICE BOLTZMANN METHOD PARTICULATE SUSPENSIONS IMMERSED-BOUNDARY NUMERICAL SIMULATIONS SPHERICAL-PARTICLES ANALYTIC SOLUTIONS ELEMENT-METHOD SIMPLE FLOWS FLUID EQUATION
DOI	10.1016/j.compfluid.2014.03.005
英文摘要	We numerically study the drafting, kissing and tumbling (DKT) phenomenon of two non-identical circular particles sedimenting in a two-dimensional infinite channel by using the lattice Boltzmann equation with a multiple-relaxation-time collision model. The main emphasis of this work is to investigate the effect of the longitudinal distance and diameter ratio between'two particles on the flow pattern during sedimentation. The method is first validated by simulating the sedimentation of one single particle and two identical particles. For two particles with different sizes, two cases are considered: in Case-1, the larger particle is initially located above the smaller one; in Case-2, the smaller particle is initially above the larger one. The simulation results are compared with the case of two equal-sized particles. The results show that two particles with different sizes are easier to separate than two identical ones. In particular, the effects of initial longitudinal distance (D-h) and diameter ratio on the occurrence of the DKT process are studied in detail. With changing these two parameters, the results reveal the transitions between the DKT phenomena. It is shown that the DKT process can take place (only once) regardless of any value of D-h in Case-1, while in Case-2, the two particles will never undergo the DKT process when increasing D-h beyond a certain threshold. The results also show that, as the particle diameter ratio gamma is increased starting from 1, in Case-1 the two particles will interact by undergoing two transitions of the DKT phenomena: from the repeated to the one-off DKT process, while in Case-2 there exists an additional mode: the gap increases continuously from the start. (C) 2014 Elsevier Ltd. All rights reserved.; Computer Science, Interdisciplinary Applications; Mechanics; SCI(E); EI; 2; ARTICLE; zlguo@hust.edu.cn; 20-34; 96
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/154263]
专题	工学院
推荐引用方式 GB/T 7714	Wang, L.,Guo, Z. L.,Mi, J. C.. Drafting, kissing and tumbling process of two particles with different sizes[J]. computers fluids,2014.
APA	Wang, L.,Guo, Z. L.,&Mi, J. C..(2014).Drafting, kissing and tumbling process of two particles with different sizes.computers fluids.
MLA	Wang, L.,et al."Drafting, kissing and tumbling process of two particles with different sizes".computers fluids (2014).