An experimental study of the influence of weak convection on perikinetic coagulation
文献类型：期刊论文
| 作者 | Sun ZW(孙祉伟) ; Qiao RL(乔润龙)
|
| 刊名 | Journal of Colloid and Interface Science
 |
| 出版日期 | 2000 |
| 卷号 | 223期号:1页码:126-132 |
| ISSN号 | 0021-9797 |
| 通讯作者 | Sun, ZW (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100080, Peoples R China. |
| 中文摘要 | 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. |
| 学科主题 | 力学 |
| 类目[WOS] | Chemistry, Physical |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | SMALL PARTICLES ; GRAVITY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000085770700012 |
| 公开日期 | 2007-06-15 ; 2007-12-05 ; 2009-06-23 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/17265]  |
| 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,Qiao RL. 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.(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. |
入库方式： OAI收割
来源：力学研究所
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