化工学报2011，Vol.62Issue(11)：3039-3045,7.DOI:10.3969/j.issn.0438-1157.2011.11.009
局部微型加热下液滴表面温度分布特性
Surface temperature distribution of droplet heated by local microheater
摘要
Abstract
The temperature distribution of droplet surface directly influences the microflow inside the droplet, but most of the papers about droplet surface temperature are based on substrate heating mode. In this study, with the aid of the infrared thermograph and MEMS technology, both the surface temperature and the temperature gradient of the droplet were investigated based on local heating mode. It was found that different from the concave distribution of surface temperature in the substrate heating mode, the surface temperature of the droplet in the local heating mode showed a convex distribution with a higher temperature at the apex but a lower temperature at the edge. With the increase of heating power, both the surface temperature and the temperature gradient were increased. However, as the heating power reached a certain value, the surface temperature gradient increased less and finally tended to a uniform distribution. The surface temperature of the droplet before and after the bubble burst under local boiling was also investigated. The results presented in this paper help to understand the internal microflow of droplets in the local heating mode and manipulate the microflow inside droplets.关键词
液滴/局部加热/微型加热器/表面温度分布/温度梯度Key words
droplet/local heating/microheater/surface temperature distribution/temperature gradient分类
能源科技引用本文复制引用
胡定华,吴慧英,吴信宇..局部微型加热下液滴表面温度分布特性[J].化工学报,2011,62(11):3039-3045,7.基金项目
国家杰出青年科学基金项目(50925624) （50925624）
国家重点基础研究发展计划项目(2012CB720404) （2012CB720404）
上海市曙光计划跟踪项目(08GG05). （08GG05）
