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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

LIQUID FLOW AND HEAT TRANSFER IN MICROCHANNELS WITH/WITHOUT PHASE CHANGE

Get access (open in a dialog) DOI: 10.1615/IHTC10.5330
pages 159-177

Sinopsis

We have briefly reviewed here with discussions for the developments and achievements of the researches on fluid flow and heat transfer characteristics in microchannels having the dimensions ranging from several hundred to 0.1 micrometers in last few years. A sequence of experiments have been conducted to examine the liquid flow and heat transfer in microchannels with/without phase change. This research has exposed some quite strange phenomena and characteristics which are distinctly dissimilar to those of liquid forced convection and flow boiling in conventional macro channels or tubes. Especially, the performance of heat transfer in transition and laminar was found greatly affected by inlet liquid temperature, velocity and microchannel size besides the Reynolds number which is considered as only critical parameter describing the laminar heat transfer for conventional case if buoyancy is neglected, and there is no observable vapor bubble in the microchannels even for the fully developed nucleate boiling. The research on these objectives is currently new active area. The experimentation manifests these transport processes and phenomena are extremely complicated. There is still a lot of future work, for instance, to identify the behaviors of laminar, transition heat transfer, flow boiling, and flow and heat transfer regime conversions. Also, experimental and theoretical methodology seems being needed to innovate and develop in the future investigations.