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Transient Local Resolution of Flow Boiling in a Microchannel With a Streamlined Pin Fin

[+] Author Affiliations
Anatoly Parahovnik, Yingying Wang, Yoav Peles

University of Central Florida, Orlando, FL

Paper No. ICNMM2018-7602, pp. V001T02A001; 5 pages
doi:10.1115/ICNMM2018-7602
From:
  • ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels
  • ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels
  • Dubrovnik, Croatia, June 10–13, 2018
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5119-7
  • Copyright © 2018 by ASME

abstract

Flow boiling around a single streamlined pin fin in a microchannel with engineering fluid, HFE-7000, was experimentally studied. A micro heater and an array of resistance temperature detectors (RTDs) were integrated into the microchannel device to enable heating and local temperature measurements on the microchannel internal wall. Thermal behavior as a function of position, heat flux, mass flux, and pressure was investigated for single phase flow and flow boiling. High-speed visualization of the two-phase flow was used to identify pertinent flow patterns and to complement the surface temperature measurements. It was found that the nucleate boiling regime and the periodic behavior of the boiling process was strongly dependent on the system’s pressure.

Copyright © 2018 by ASME

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