| Bond数变化对固壁液滴接触角的影响 |
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| 引用本文： | 朱志强,汪洋,刘秋生.Bond数变化对固壁液滴接触角的影响[J].工程热物理学报,2012(2):251-254. |
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| 作者姓名： | 朱志强 汪洋 刘秋生 |
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| 作者单位： | 中国科学院微重力重点实验室中国科学院力学研究所 |
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| 基金项目： | 国家自然科学基金资助项目(No.11072249;No.50890182);中国科学院国防科技创新基金项目(No.CXtJJ-10-M55) |
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| 摘 要： | 本文利用微重力落塔实验研究了Bond数改变时,PTFE和铝板表面上正滴和倒滴接触角的动态变化。实验发现液滴接触角与Bond数的大小有关,当Bond数趋于0时,还与其放置状态有关。本文采用VOF方法对Bond数变化引起的液滴形状及内部流动变化进行二维数值模拟,结果显示液滴内部的流动控制着液滴的外形和接触角。
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| 关 键 词： | 液滴 Bond数 接触角 微重力 |
Influence of Bond Number on the Contact Angle of Liquid Drops Deposited on Solid Substrates |
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| Affiliation: | ZHU Zhi-Qiang WANG Yang LIU Qiu-Shcng (Key Laboratory of Microgravity/CAS,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China) |
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| Abstract: | The behaviors of liquid drops in microgravity have been experimentally performed in Beijing 3.6 s Drop Tower.Contact angle dynamic behaviors of sessile and pendant liquid drops on PTFE and Aluminum were measured and analyzed for varying Bond number.It was found that Bond number had direct influence on the drop contact angle.And the drops with different status (sessile or pendant) also exhibited dissimilar contact angle behaviors when Bond number closed to zero.For comparison,the VOF methodology was introduced to analyze numerically the influence of Bond number on the shapes and inner bulk flow fields of liquid drops.It indicated that the bulk flow could influence the shape and contact angle of drops evidently. |
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| Keywords: | drop bond number contact angle microgravity |
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