An experimental study of the influence of weak convection on perikinetic coagulation

doi:10.1006/jcis.1999.6660

IMECH-IR > 力学所知识产出(1956-2008)

	An experimental study of the influence of weak convection on perikinetic coagulation
	Sun ZW(孙祉伟); Qiao RL(乔润龙); Sun, ZW (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100080, Peoples R China.
发表期刊	Journal of Colloid and Interface Science
	2000
卷号	223 期号:1 页码:126-132
ISSN	0021-9797
摘要	A remarkably increased coagulation rate for 2-mu m PS spheres was previously reported for a perikinetic coagulation experiment performed under microgravity conditions (1998, R. Folkersma, A. J. G. van Diemen, and H. N. Stein, J. Colloid Interface Sci. 206, 482); from this experiment, it was assumed that the leading factor slowing the coagulation process under normal gravitation was free convection due to gravity (1998, R. Folkersma, and H. N. Stein, J. Colloid Interface Sci. 206, 494). To test the influence of free convection as a single-effect factor on the coagulation process, a ground-based experiment was constructed. The coagulation rate of 2-mu m PS spheres dispersed in water was determined by measuring the turbidity of the dispersion solution while convection-driven flows in the solution were checked with a visual magnification system. We found that it was possible to cease free convection-driven particle flows on the ground, as long as the experiments were carefully operated. The strength of convection was controlled by changing the temperature gradient applied to the sample cell. By monitoring both the coagulation rate and convection-driven flows simultaneously, our experiments showed that weak free convection (maximum speed <150 mu m/s) actually has negligible effects on the coagulation rate.
学科领域	力学
DOI	10.1006/jcis.1999.6660
收录类别	SCI
语种	英语
WOS记录号	WOS:000085770700012
关键词[WOS]	SMALL PARTICLES ; GRAVITY
WOS研究方向	Chemistry
WOS类目	Chemistry, Physical
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/17265
专题	力学所知识产出(1956-2008)
通讯作者	Sun, ZW (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Sun ZW,Qiao RL,Sun, ZW . An experimental study of the influence of weak convection on perikinetic coagulation[J]. Journal of Colloid and Interface Science,2000,223,1,:126-132.
APA	孙祉伟,乔润龙,&Sun, ZW .(2000).An experimental study of the influence of weak convection on perikinetic coagulation.Journal of Colloid and Interface Science,223(1),126-132.
MLA	孙祉伟,et al."An experimental study of the influence of weak convection on perikinetic coagulation".Journal of Colloid and Interface Science 223.1(2000):126-132.

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