| Directional Motion of Droplets in a Conical Tube or on a Conical Fibre |
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| 引用本文： | 刘建林 夏热 李炳蔚 冯西桥. Directional Motion of Droplets in a Conical Tube or on a Conical Fibre[J]. 中国物理快报, 2007, 24(11): 3210-3213 |
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| 作者姓名： | 刘建林 夏热 李炳蔚 冯西桥 |
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| 作者单位： | FML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10732050, 10525210 and 10121202 |
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| 摘 要： |
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| 关 键 词： | 圆锥管 圆锥纤维管 液体 运动状态 |
| 收稿时间： | 2007-09-04 |
Directional Motion of Droplets in a Conical Tube or on a Conical Fibre |
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| LIU Jian-Lin,XIA Re,LI Bing-Wei,FENG Xi-Qiao. Directional Motion of Droplets in a Conical Tube or on a Conical Fibre[J]. Chinese Physics Letters, 2007, 24(11): 3210-3213 |
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| Authors: | LIU Jian-Lin XIA Re LI Bing-Wei FENG Xi-Qiao |
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| Affiliation: | FML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084 |
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| Abstract: | Manipulating the directional movement of liquid droplets is of significance for design and fabrication of some microfluidic devices, An energy-based method is adopted to analyse the directional movement of a droplet deposited in a conical tube or on a conical fibre. We perform an experiment to investigate the directional motion of a droplet in an open conical tube. Our theoretical analysis and experimental observations both demonstrate that surface tension can drive the droplet to move in the conical tube. The critical condition of the liquid moving in the conical tube is presented. We also analyse a droplet on a conical hydrophilic fibre, which can move from the thinner to the thicker end. |
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| Keywords: | 68.03.Cd 87.19.St |
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