Effect of contact angle on water droplet freezing process on a cold flat surface

被引：127
作者：
Huang, Lingyan [1 ,2 ]
Liu, Zhongliang [1 ]
Liu, Yaomin [1 ]
Gou, Yujun [1 ,2 ]
Wang, Li [3 ]
机构：
[1] Beijing Univ Technol, Coll Environm & Energy Engn, Minist Educ, Key Lab Enhanced Heat Transfer & Energy Conservat, Beijing 100124, Peoples R China
[2] Beijing Inst Space Launch Technol, Beijing 100076, Peoples R China
[3] Tangshan Univ, Tangshan 063000, Peoples R China
来源：
EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2012年 / 40卷
基金：
北京市自然科学基金;
关键词：
Contact angle; Water droplet; Hydrophobic surface; Crystal growth; FROST FORMATION; PLATE; GROWTH;
D O I：
10.1016/j.expthermflusci.2012.02.002
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The effect of contact angle on water droplet freezing process on a cold flat surface under natural convection conditions was experimentally investigated. A series of hydrophobic surfaces with different contact angles were prepared by solution immersion. The contact angles of these surfaces were varied from 97.2 degrees to 154.9 degrees. Comparative observations of water droplet freezing processes were carried out on both plain copper surface and these hydrophobic surfaces under the same conditions. The experimental results showed that the contact angle has a strong influence on the water droplet freezing time. The larger the contact angle is, the longer the freezing time. The frost crystals growth on the droplet surface that frozen on the hydrophobic surface is faster and presents a pattern that is more dendritic than that on the plain copper surface. (C) 2012 Elsevier Inc. All rights reserved.
引用
收藏
页码：74 / 80
页数：7
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