Interface oscillation of subcooled flow boiling in locally heated microchannels
Interface oscillation of subcooled flow boiling in locally heated microchannels
复制标题
局部加热微通道中过冷流沸腾的界面振荡
DOI：
10.1007/s00231-008-0433-1
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发表时间：
2009-02
期刊：
影响因子：
--
通讯作者：
中科院分区：
文献类型：
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作者：
An investigation was conducted to understand flow boiling of subcooled de-ionized water in locally heated parallel microchannels. High-speed visualization technology was employed to visually observe the transient phase change process in an individual microchannel. Signal analysis method was employed in studying the interface movement and phase change process. The phase change at locally heated condition was different from those at entirely heated condition where elongated bubble(s) stayed quasi-stable for a long time without venting out. Diversified and intensive interface oscillation was observed occurring on both of the upstream and downstream bubble caps. Evaporation and condensation modes were characterized with distinguished oscillation frequencies. The film-driven oscillations of both evaporating and condensing interfaces generally operated at higher frequencies than the oscillations driven by nucleation or dropwise condensation.
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