Numerical Study on the Impact of Hollow Droplet on Liquid Film

被引：0
|
作者：
Yan Z. [1 ]
Li Y. [1 ]
机构：
[1] College of Engineering, Ocean University of China, Qingdao
来源：
Li, Yan (yanli@ouc.edu.cn) | 2018年 / Zhejiang University卷 / 32期
关键词：
Heat transfer; Hollow droplet; Impact; Liquid film;
D O I：
10.3969/j.issn.1003-9015.2018.03.006
中图分类号：
学科分类号：
摘要：
A numerical model of hollow droplet impact on liquid film was developed based on (coupled level set and volume of fluid) CLSVOF and validated. The dynamic and heat transfer characteristics of the impact were studied. The results show that the dynamic impact process includes liquid shell broken, coalescence between liquid shell and liquid film and droplet spreading. Phenomena of air bubble entrapment and jetting flow are observed. The reason of jetting flow is due to the existence of larger local pressure difference in the neck region. Liquid temperature near wall increases and heat flux density decreases with the increase of time, and effect of droplet impact becomes more obvious. Effects of liquid shell thickness, liquid film thickness and impact velocity on heat transfer characteristics were analyzed. The average heat flux of wall increases with the increase of liquid shell thickness and impact velocity, and it decreases with the increase of liquid film thickness. © 2018, Editorial Board of "Journal of Chemical Engineering of Chinese Universities". All right reserved.
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页码：529 / 536
页数：7
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