Bubble cavitation in a microchannel

被引:78
作者
Li, J
Cheng, P [1 ]
机构
[1] Shanghai Jiao Tong Univ, Sch Mech & Power Engn, Shanghai 200030, Peoples R China
[2] Hong Kong Univ Sci & Technol, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China
关键词
bubble cavitation; microchannel; kinetics; homogeneous nucleation; heterogeneous nucleation;
D O I
10.1016/j.ijheatmasstransfer.2003.11.020
中图分类号
O414.1 [热力学];
学科分类号
摘要
The effects of microchannel size, mass flow rate and heat flux on boiling incipience or bubble cavitation in a microchannel are studied in this paper. The well-known concept of survival of a bubble cavity is extended, and the classical kinetics of nucleation is introduced to study bubble nucleation in water flowing in a silicon microchannel. The effects of contact angle, dissolved gas, and the existence of microcavities and corners in the microchannel on bubble's nucleation/cavitation temperature are estimated. With this information, a numerical solution is carried out to study the effects of mass flow rate and heat flux on bubble nucleation/cavitation in microchannels. The results of this analysis provide further physical insight on boiling heat transfer in microchannels. (C) 2003 Elsevier Ltd. All rights reserved.
引用
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页码:2689 / 2698
页数:10
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