| 液体在固体表面上的铺展动力学 |
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| 引用本文： | 王晓东,彭晓峰,段远源,王补宣. 液体在固体表面上的铺展动力学[J]. 中国化学工程学报, 2007, 15(5): 730-737 |
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| 作者姓名： | 王晓东 彭晓峰 段远源 王补宣 |
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| 作者单位： | [1]Department of Thermal Engineering, School of Mechanical Engineering, University of Science and Technology BDeijing, Beijing 100083, China [2]Department of Thermal Engineering, Tsinghua University, Beijing 100084, China |
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| 摘 要： | Based on assuming that there is the precursor film in the front of the apparent contact line （ACL）, a model was proposed to understand the dynamic wetting process and associated dynamic contact angle. The present model indicated that a new dimensionless characteristic parameter, 2, attects the dynamic wetting process and associated dynamic contact angle as well. However, the previous model suggested that the dynamic contact angle is dependent＇on the capillary number and static contact angle only. An experimental investigation was conducted to measure the dynamic wetting behavior of silicon oil moving over glass, aluminum and stainless steel surfaces. It concluded that when the value of 2 was selected as 0.07, 0.16 and 0.35 for glass, aluminum and stainless steel, respectively, the experimental results were in good accordance with the prediction of the model. Furthermore, the comparison of the model with Strom＇s experimental data showed that 2 is independent on the species of liquids. Apparently, 2 should be interpreted as the effect of the solid surface properties on the dynamic wetting process.Meanwhile, it is found in the present experiment that the Hoffman-Voinov-Tanner law, which is valid at very low capillary number （Ca 〈〈 1 or 80〈 10°） recommend by Cazabat, still holds for higher contact angles, even up to 70°-80°. This is explained by （he present model very well.
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| 关 键 词： | 液体 固体表面 铺展动力学 产品技术 |
| 收稿时间： | 2006-10-16 |
| 修稿时间： | 2006-10-16 |
Dynamics of spreading of liquid on solid surface |
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| WANG Xiaodong,PENG Xiaofeng,DUAN Yuanyuan,WANG Buxuan. Dynamics of spreading of liquid on solid surface[J]. Chinese Journal of Chemical Engineering, 2007, 15(5): 730-737 |
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| Authors: | WANG Xiaodong PENG Xiaofeng DUAN Yuanyuan WANG Buxuan |
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| Affiliation: | Department of Thermal Engineering, School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China;Department of Thermal Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | dynamic wetting, dynamic contact angle, stress singularity, precursor film, slip |
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| Keywords: | dynamic wetting dynamic contact angle stress singularity precursor film slip |
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