Numerical simulations of guided self-propelled jumping of droplets on a wettability gradient surface

Zhiping Yuan, Xiaomin Wu*, Fuqiang Chu, Renzhi Wu

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

27 引用 (Scopus)

摘要

The direction control of self-propelled jumping of droplets has great significance for efficient chip cooling, anti-icing and self-cleaning. The transport mechanism of guided self-propelled jumping needs to be further explored since it is different in many ways from the extensively-studied vertical jumping of coalescing droplets on surfaces without a surface energy gradient. In this work, the VOF method was used to simulate the guided self-propelled jumping of droplets on superhydrophobic, wettability gradient surfaces. The effects of the surface energy gradient and the initial droplet arrangement on the jumping velocity and energy conversion efficiency are investigated. The results show that the jumping direction is tilted to the side with a smaller contact angle, rather than being perpendicular to the surface, due to the uneven force distribution along the three-phase line. In addition, the surface energy gradient reduces the droplet symmetry resulting in a lower energy conversion efficiency.

源语言英语
页(从-至)524-530
页数7
期刊Applied Thermal Engineering
156
DOI
出版状态已出版 - 25 6月 2019
已对外发布

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