Cluster dynamics and fictitious boiling in microchannels

被引:38
作者
Peng, XF [1 ]
Liu, D
Lee, DJ
Yan, Y
Wang, BX
机构
[1] Tsinghua Univ, Dept Thermal Engn, Beijing 100084, Peoples R China
[2] Natl Taiwan Univ, Dept Chem Engn, Taipei 106, Taiwan
基金
中国国家自然科学基金;
关键词
boiling; microscale transport phenomenon; bubble nucleation; perturbation; microchannal; cluster dynamics; pressure fluctuation model; heat transfer;
D O I
10.1016/S0017-9310(00)00056-9
中图分类号
O414.1 [热力学];
学科分类号
摘要
Bubble nucleation could hardly be noted in microscale boiling systems even under high heat flux, denoting as the fictitious boiling phenomenon. We investigated in this work the role of perturbations on the dynamics of clusters, whence developing the physical interpretation of the fictitious boiling commonly observed in microscale boiling. Both the effects of internal and external perturbations were examined. The external perturbations could markedly depress the development of clusters, thereby correlating with the bubble-extinction characteristic noted in fictitious boiling. A pressure fluctuation model was proposed to provide a criterion to the occurrence of fictitious boiling. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:4259 / 4265
页数:7
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