CHARACTERISTICS OF NUCLEATION AND BUBBLE GROWTH DURING MICROSCALE BOILING

机译：微沸腾过程中的形核和气泡生长特征

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In this paper, both nucleus formation and bubble growth during boiling in microchannels were investigated. A series of visualized experiments were conducted to observe the boiling nucleation and bubble dynamics restricted within parallel microchannels on a silicon wafer. The channels were rectangular and had selected length scale ranging from 50 to 100 microns. A high-speed CCD camera was employed together with a microscope to dynamically record the boiling images. The rates of bubble growth were measured in the channels. The phase change nucleus formation theory was used to determine the initial position of the bubble. The bubble growth rate was described by two ordinary differential equations deduced from the microlayer evaporation theory. The calculation and experimental results were reasonably coincided.

机译：本文研究了微通道沸腾过程中核的形成和气泡的生长。进行了一系列可视化实验，以观察限制在硅晶片上平行微通道内的沸腾成核和气泡动力学。通道是矩形的，并具有从50到100微米的选定长度尺度。高速CCD相机与显微镜一起使用以动态记录沸腾图像。在通道中测量气泡的生长速率。相变核形成理论用于确定气泡的初始位置。气泡的生长速率由微层蒸发理论推导的两个常微分方程描述。计算结果与实验结果基本吻合。

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来源
《American Society of Mechanical Engineers(ASME) Summer Heat Transfer Conference(HT2005) vol.2; 20050717-22; San Francisco,CA(UA)》|2005年|P.225-231|共7页
会议地点 San FranciscoCA(UA)
作者
Yong Tian; Jiang-Tao Liu; Xiao-Feng Peng;
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作者单位

Laboratory of Phase Change and Interfacial Transport Phenomena Department of Thermal Engineering, Tsinghua University, Beijing 100084, China;

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原文格式 PDF
正文语种 eng
中图分类热力工程理论;
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CHARACTERISTICS OF NUCLEATION AND BUBBLE GROWTH DURING MICROSCALE BOILING

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