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| 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.
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| Source Publication | Journal of Colloid and Interface Science
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| 2000 | |
| Volume | 223Issue:1Pages:126-132 |
| ISSN | 0021-9797 |
| Abstract | 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. |
| Subject Area | 力学 |
| DOI | 10.1006/jcis.1999.6660 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000085770700012 |
| WOS Keyword | SMALL PARTICLES ; GRAVITY |
| WOS Research Area | Chemistry |
| WOS Subject | Chemistry, Physical |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/17265 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Sun, ZW (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100080, Peoples R China. |
| Recommended Citation 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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