摘要
亚微米芯片通道中的沸腾相变极不稳定,在某些条件下,在芯片微通道的同一位置处会出现不同相态流体的交变现象,并伴随有剧烈的热力参数波动。本文通过显微观测和高速摄影技术,对芯片微通道沸腾相变过程中不同相态流体交变现象的成因及特点进行了揭示和分析,这对认识高热流密度条件下芯片微热沉中的流动非稳定性问题具有重要意义。
The flow boiling in silicon microchannels with the hydraulic diameter less than 200μm is very unstable. Under some conditions, there appear different alternating flow patterns accompanied with great fluctuations of thermo-parameters at the same position of microchannels. With the aids of the microscope and high speed video recording system, the origin and characteristics of alternating flow patterns have been investigated. The results obtained in this paper help to better understand two-phase instabilities phenomena occurring in silicon micro heat sinks.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2006年第z2期61-64,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.5036010)
上海曙光计划项目资助(No.04SG13)
关键词
芯片微通道
沸腾
非稳定
流动交变
silicon microchannels
boiling
instability
alternating flow
