Stochastic approach to the anti-freezing behaviors of superhydrophobic surfaces

被引:43
作者
Kim, Min-Hwan [1 ]
Kim, Dong Rip [1 ]
Lee, Kwan-Soo [1 ]
机构
[1] Hanyang Univ, Sch Mech Engn, 222 Wangsimni Ro, Seoul 04763, South Korea
基金
新加坡国家研究基金会;
关键词
Frost; Superhydrophobic; Freezing; FROST FORMATION; ICE NUCLEATION; WATER DROPLET; DYNAMICS; GROWTH;
D O I
10.1016/j.ijheatmasstransfer.2016.10.015
中图分类号
O414.1 [热力学];
学科分类号
摘要
The anti-freezing (or freezing delay) characteristics of sessile water droplets placed on bare and superhydrophobic surfaces were experimentally investigated. The change of the droplet temperature during the cooling and freezing processes was monitored under a constant surface temperature. The freezing delay time was calculated for a statistically large ensemble of droplets, which showed a random distribution. The minimum and maximum freezing delay times of droplets on the bare and superhydrophobic surfaces were analyzed by using a cumulative distribution function. The maximum freezing delay time of the superhydrophobic surfaces was more than three times longer than that of the bare surfaces. Moreover, about 7% of the water droplets on the superhydrophobic surface could be frozen earlier than or similarly with those on the bare surface. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:841 / 846
页数:6
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