Bubble Coalescence and Moving Contact Line Evaporation During Flow Boiling in a Single Minichannel
Bubble Coalescence and Moving Contact Line Evaporation During Flow Boiling in a Single Minichannel
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单个微通道内流动沸腾过程中的气泡聚结和移动接触线蒸发
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Christoph Kirse
中科院分区：
文献类型：
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作者：
Martin Freystein;P. Stephan;Christoph Kirse
在微型和微通道中结合流动沸腾的冷却系统可实现非常高的热性能。在这项研究中，采用综合测量技术来研究单个矩形微通道中的流动沸腾。该技术可以结合同步流态观测以非常高的空间和时间分辨率测量局部表面热通量和温度[1]。这样，就可以深入了解基本现象，并将有助于对该过程的基本理解。实验结果显示了不同的现象，例如细长气泡的气泡前端和末端之间的高传热交替区域以及流动中气泡的合并。这些观察到的现象与池沸腾的实验和数值结果相当。版权所有 © 2013 ASME
Cooling systems incorporating flow boiling in mini- and microchannels achieve very high thermal performance. In this study a comprehensive measurement technique is used for the investigation of flow boiling in a single rectangular minichannel. This technique allows the measurement of local surface heat flux and temperature with a very high spatial and temporal resolution in combination with a synchronized flow regime observation [1]. This way, an insight into the basic phenomena is possible and will contribute to the fundamental understanding of the process. The experimental results show different phenomena such as an alternating area of high heat transfer between bubble front and end for elongated bubbles and the coalescence of bubbles in the flow. These observed phenomenon are comparable to experimental and numerical results of pool boiling.Copyright © 2013 by ASME