Boiling heat transfer and corresponding two-phase flow phenomena are of significant interest for the design of a compact evaporator. The present work investigates experimentally, using a high-speed digital CCD camera, the two-phase flow phenomena for boiling in a silicon-based, two parallel trapezoid microchannels, which were prepared by the combination of silicon bulk micro machining and Pyrex-silicon wafer bonding. Onset of nucleate boiling, bubbly flow, slug flow, and partial dry out slug flow are typically observed along the flow direction. The appearance of the partial dryout slug flow may degrade the nucleate boiling heat transfer in the microchannel. At a low flow rate, reversed vapor flow is observed. In such a flow pattern, liquid droplets are formed intermittently on the inner wall of top Pyrex glass due to vapor condensation. Moreover, the reversed vapor flow usually accompanies with large magnitude two-phase flow oscillations.
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ASME 2004 2nd International Conference on Microchannels and Minichannels
June 17–19, 2004
Rochester, New York, USA
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4164-2
PROCEEDINGS PAPER
Two-Phase Flow Phenomena for Boiling in Two Parallel Microchannels
H. Y. Li,
H. Y. Li
National Tsing Hua University, Hsinchu, Taiwan
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P. C. Lee,
P. C. Lee
National Tsing Hua University, Hsinchu, Taiwan
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F. G. Tseng,
F. G. Tseng
National Tsing Hua University, Hsinchu, Taiwan
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Chin Pan
Chin Pan
National Tsing Hua University, Hsinchu, Taiwan
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H. Y. Li
National Tsing Hua University, Hsinchu, Taiwan
P. C. Lee
National Tsing Hua University, Hsinchu, Taiwan
F. G. Tseng
National Tsing Hua University, Hsinchu, Taiwan
Chin Pan
National Tsing Hua University, Hsinchu, Taiwan
Paper No:
ICMM2004-2384, pp. 581-587; 7 pages
Published Online:
December 2, 2008
Citation
Li, HY, Lee, PC, Tseng, FG, & Pan, C. "Two-Phase Flow Phenomena for Boiling in Two Parallel Microchannels." Proceedings of the ASME 2004 2nd International Conference on Microchannels and Minichannels. ASME 2nd International Conference on Microchannels and Minichannels. Rochester, New York, USA. June 17–19, 2004. pp. 581-587. ASME. https://doi.org/10.1115/ICMM2004-2384
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