Coupling effect of Brownian motion and laminar shear flow on colloid coagulation: A Brownian dynamics simulation study

	Coupling effect of Brownian motion and laminar shear flow on colloid coagulation: A Brownian dynamics simulation study
	Xu SH(徐升华); Sun ZW(孙祉伟); Li X(李旭); Wang JT; Sun, ZW
刊名	CHINESE PHYSICS B
	2012-05-01
通讯作者邮箱	sunzw@imech.ac.cn
卷号	21 期号:5 页码:054702
关键词	simultaneous orthokinetic and perikinetic coagulation Brownian motion shear flow colloidal aggregation Turbidity Measurement Aggregation Dispersions Particles Diffusion
ISSN号	1674-1056
通讯作者	Sun, ZW ; Chinese Acad Sci, Key Lab Micrograv, Inst Mech, Beijing 100190, Peoples R China.
产权排序	[Xu Sheng-Hua;Sun Zhi-Wei; Li Xu] Chinese Acad Sci, Key Lab Micrograv, Inst Mech, Beijing 100190, Peoples R China; [Xu Sheng-Hua; Sun Zhi-Wei; Li Xu] Chinese Acad Sci, Natl Micrograv Lab, Inst Mech, Beijing 100190, Peoples R China; [Jin Tong Wang] Southern Univ, Dept Phys, Baton Rouge, LA 70813 USA; [Jin Tong Wang] A&M Coll, Baton Rouge, LA 70813 USA
合作状况	国际
中文摘要	Simultaneous orthokinetic and perikinetic coagulations (SOPCs) are studied for small and large Peclet numbers (P-e) using Brownian dynamics simulation. The results demonstrate that the contributions of the Brownian motion and the shear flow to the overall coagulation rate are basically not additive. At the early stages of coagulation with small Peclet numbers, the ratio of overall coagulation rate to the rate of pure perikinetic coagulation is proportional to P-e(1/2), while with high Peclet numbers, the ratio of overall coagulation rate to the rate of pure orthokinetic coagulation is proportional to P-e(-1/2). Moreover, our results show that the aggregation rate generally changes with time for the SOPC, which is different from that for pure perikinetic and pure orthokinetic coagulations. By comparing the SOPC with pure perikinetic and pure orthokinetic coagulations, we show that the redistribution of particles due to Brownian motion can play a very important role in the SOPC. In addition, the effects of redistribution in the directions perpendicular and parallel to the shear flow direction are different. This perspective explains the behavior of coagulation due to the joint effects of the Brownian motion (perikinetic) and the fluid motion (orthokinetic).
学科主题	物理力学
分类号	二类/Q2
收录类别	SCI ; EI ; CSCD
资助信息	Project supported by the National Natural Science Foundation of China (Grant Nos. 10972217, 10932012 and 11032011) and the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KJCX2-YW-L08).
原文出处	http://dx.doi.org/10.1088/1674-1056/21/5/054702
语种	英语
WOS记录号	WOS:000303999000055
公开日期	2013-01-18
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/46579]
专题	力学研究所_国家微重力实验室
通讯作者	Sun, ZW
推荐引用方式 GB/T 7714	Xu SH,Sun ZW,Li X,et al. Coupling effect of Brownian motion and laminar shear flow on colloid coagulation: A Brownian dynamics simulation study[J]. CHINESE PHYSICS B,2012,21(5):054702.
APA	徐升华,孙祉伟,李旭,Wang JT,&Sun, ZW.(2012).Coupling effect of Brownian motion and laminar shear flow on colloid coagulation: A Brownian dynamics simulation study.CHINESE PHYSICS B,21(5),054702.
MLA	徐升华,et al."Coupling effect of Brownian motion and laminar shear flow on colloid coagulation: A Brownian dynamics simulation study".CHINESE PHYSICS B 21.5(2012):054702.