Towards an Understanding of the Influence of Sedimentation on Colloidal Aggregation by Peclet Number

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	Towards an Understanding of the Influence of Sedimentation on Colloidal Aggregation by Peclet Number
	Sun ZW(孙祉伟); Liu J(刘捷); Xu SH(徐升华)
刊名	Chinese Physics Letters
	2005
通讯作者邮箱	sunzw@imech.ac.cn
卷号	22 期号:8 页码:2119-2122
ISSN号	0256-307X
通讯作者	Sun, ZW (reprint author), Chinese Acad Sci, Inst Mech, NML, Beijing 100080, Peoples R China.
中文摘要	The Peclet number is a useful index to estimate the importance of sedimentation as compared to the Brownian motion. However, how to choose the characteristic length scale for the Peclet number evaluation is rather critical because the diffusion length increases as the square root of the time whereas the drifting length is linearly related to time. Our Brownian dynamics simulation shows that the degree of sedimentation influence on the coagulation decreases when the dispersion volume fraction increases. Therefore using a fixed length, such as the diameter of particle, as the characteristic length scale for Peclet number evaluation is not a good choice when dealing with the influence of sedimentation on coagulation. The simulations demonstrated that environmental factors in the coagulation process, such as dispersion volume fraction and size distribution, should be taken into account for more reasonable evaluation of the sedimentation influence.
学科主题	力学
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
关键词[WOS]	PERIKINETIC COAGULATION ; RAPID COAGULATION ; PARTICLES ; GRAVITY ; DIFFUSION ; DISPERSION ; DENSITY ; SPHERES ; FLOW
收录类别	SCI
语种	英语
WOS记录号	WOS:000231049100082
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/16877]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Sun ZW,Liu J,Xu SH. Towards an Understanding of the Influence of Sedimentation on Colloidal Aggregation by Peclet Number[J]. Chinese Physics Letters,2005,22(8):2119-2122.
APA	孙祉伟,刘捷,&徐升华.(2005).Towards an Understanding of the Influence of Sedimentation on Colloidal Aggregation by Peclet Number.Chinese Physics Letters,22(8),2119-2122.
MLA	孙祉伟,et al."Towards an Understanding of the Influence of Sedimentation on Colloidal Aggregation by Peclet Number".Chinese Physics Letters 22.8(2005):2119-2122.