Surface Structure Enhanced Microchannel Flow Boiling
Name
Revised_HT-15-1411_JHT_removed.pdf
Description
Main article
Size
2.11 MB
Format
Adobe PDF
Checksum (MD5)
335af509308d4452437688bd47d67a31
Author(s)
Zhu, Yangying
Antao, Dion Savio
Chu, Kuang-Han
Chen, Siyu
Hendricks, Terry J.
Zhang, Tiejun
Wang, Evelyn N.
Date Issued
May 2016
Journal
Journal of Heat Transfer
Publisher
American Society of Mechanical Engineers (ASME)
Citation
Zhu, Yangying, Dion S. Antao, Kuang-Han Chu, Siyu Chen, Terry J. Hendricks, Tiejun Zhang, and Evelyn N. Wang. “Surface Structure Enhanced Microchannel Flow Boiling.” Journal of Heat Transfer 138, no. 9 (May 17, 2016): 091501.
Version
Author's final manuscript
Abstract
We investigated the role of surface microstructures in two-phase microchannels on suppressing flow instabilities and enhancing heat transfer. We designed and fabricated microchannels with well-defined silicon micropillar arrays on the bottom heated microchannel wall to promote capillary flow for thin film evaporation while facilitating nucleation only from the sidewalls. Our experimental results show significantly reduced temperature and pressure drop fluctuation especially at high heat fluxes. A critical heat flux (CHF) of 969 W/cm2 was achieved with a structured surface, a 57% enhancement compared to a smooth surface. We explain the experimental trends for the CHF enhancement with a liquid wicking model. The results suggest that capillary flow can be maximized to enhance heat transfer via optimizing the microstructure geometry for the development of high performance two-phase microchannel heat sinks.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1115/1.4033497
