An Experimental Investigation on Spreading of Droplets with Evaporation and Nucleation

被引：1
|
作者：
Lu, Gui [1 ]
Peng, Xiao-Feng [1 ]
Wang, Xiao-Dong [2 ]
机构：
[1] Tsinghua Univ, Dept Thermal Engn, Lab Phase Change & Interfacial Transport Phenomen, Beijing 100084, Peoples R China
[2] Beijing Univ Sci & Technol, Sch Mech Engn, Dept Thermal Engn, Beijing 100083, Peoples R China
来源：
HEAT TRANSFER-ASIAN RESEARCH | 2009年 / 38卷 / 01期
基金：
中国国家自然科学基金;
关键词：
droplet; evaporation; nucleate boiling; wetting; contact angle; spreading;
D O I：
10.1002/htj.20231
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
An experimental investigation was conducted to visually observe the dynamic characteristics of water droplets with evaporation and nucleation on stainless steel and polished silicon surfaces. The water droplet diameter, contact area, and spreading speed were measured using a high-speed CCD camera at surface temperatures ranging from 110 degrees C to 190 degrees C, and a model was proposed to describe the dynamic behavior of droplet spreading. The spreading of water droplets under evaporation and nucleate boiling is highly dependent on the dynamic bubble behavior in the droplets, particularly bubble volume, bubble interaction, as well as the surface properties and temperature. Water droplets were easiest to spread at the surface temperature of 130 degrees C, and the spreading tendency increased with increasing surface coarseness. (C) 2008 Wiley Periodicals, Inc.
引用
收藏
页码：40 / 50
页数：11
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