Two-phase microchannel cooling promises high heat flux removal for high-performance electronics and photonics. However, the heat transfer performance of flow boiling microchannels is limited by the critical heat flux (CHF) conditions. For variable heat inputs and variable fluid flows, it is essential to predict CHFs accurately for effective and efficient two-phase microchannel cooling. To characterize the CHF and pressure drop in flow boiling microchannels, a separated-flow model is proposed in this paper based on fundamental two-phase flow mass, energy, momentum conservation and wall energy conservation laws. With this theoretical framework, the relationship among liquid/vapor interfacial instability, two-phase flow characteristics and CHF is further studied. This mechanistic model also provides insight into the design and operational guidelines for advanced electronics and photonics cooling technologies.
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ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 Fluids Engineering Division Summer Meeting
July 8–12, 2012
Rio Grande, Puerto Rico, USA
Conference Sponsors:
- Heat Transfer Division
- Fluids Engineering Division
ISBN:
978-0-7918-4479-3
PROCEEDINGS PAPER
A Separated-Flow Model for Predicting Flow Boiling Critical Heat Flux and Pressure Drop Characteristics in Microchannels Available to Purchase
Tie Jun Zhang,
Tie Jun Zhang
Masdar Institute of Science and Technology, Abu Dhabi, UAE
Massachusetts Institute of Technology, Cambridge, MA
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Siyu Chen,
Siyu Chen
Massachusetts Institute of Technology, Cambridge, MA
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Evelyn N. Wang
Evelyn N. Wang
Massachusetts Institute of Technology, Cambridge, MA
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Tie Jun Zhang
Masdar Institute of Science and Technology, Abu Dhabi, UAE
Massachusetts Institute of Technology, Cambridge, MA
Siyu Chen
Massachusetts Institute of Technology, Cambridge, MA
Evelyn N. Wang
Massachusetts Institute of Technology, Cambridge, MA
Paper No:
ICNMM2012-73046, pp. 39-48; 10 pages
Published Online:
July 22, 2013
Citation
Zhang, TJ, Chen, S, & Wang, EN. "A Separated-Flow Model for Predicting Flow Boiling Critical Heat Flux and Pressure Drop Characteristics in Microchannels." Proceedings of the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 Fluids Engineering Division Summer Meeting. ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. Rio Grande, Puerto Rico, USA. July 8–12, 2012. pp. 39-48. ASME. https://doi.org/10.1115/ICNMM2012-73046
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