Flow pattern transition criteria of flow boiling in confined mini/micro-channel

被引：0
作者：
机构：
[1] Institute of Thermal Science and Technology, Shandong University, Jinan 250061, Shandong
来源：
Cheng, L. (cheng@sdu.edu.cn) | 1600年 / Materials China卷 / 64期
关键词：
Confined bubbly flow; Flow boiling; Flow patterns; Mini/micro-channel;
D O I：
10.3969/j.issn.0438-1157.2013.05.010
中图分类号：
学科分类号：
摘要：
The effect of channel size on bubble motion characteristics under mini/micro-scale condition is analyzed theoretically. The comparison between channel width and bubble departure diameter indicate that when the former is smaller than the latter, the flow pattern of confined bubbly flow will occur, the flow features of which is further analyzed. On this basis, traditional flow patterns in confined mini/micro-channel are subdivided and flow pattern transition criteria are derived. The prediction of the theoretical model agrees well with corresponding experimental data. The analysis on characteristics of the transition criteria shows an apparent postponement of transition for flow boiling in mini/micro-channel than that under adiabatic conditions. Moreover, for flow boiling under the same heat flux and mass flux conditions, the flow pattern transition may occur earlier with the decrease of channel size. © All Rights Reserved.
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页码：1573 / 1579
页数：6
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