Flow boiling of 1-methoxyheptafluoropropane (HFE 7000) in hydraulic diameter channels containing a single row of 24 inline pin fins was studied for mass fluxes from to and wall heat fluxes from to . Flow visualization revealed the existence of isolated bubbles, bubbles interacting, multiple flow, and annular flow. The observed flow patterns were mapped as a function of the boiling number and the normalized axial distance. The local heat transfer coefficient during subcooled boiling was measured and found to be considerably higher than the corresponding single-phase flow. Furthermore, a thermal performance evaluation comparison with a plain microchannel revealed that the presence of pin fins considerably enhanced the heat transfer coefficient.
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Flow Boiling Heat Transfer on Micro Pin Fins Entrenched in a Microchannel
Santosh Krishnamurthy,
Santosh Krishnamurthy
Department of Mechanical, Aerospace, and Nuclear Engineering,
Rensselaer Polytechnic Institute
, Troy, NY 12180
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Yoav Peles
Yoav Peles
Department of Mechanical, Aerospace, and Nuclear Engineering,
Rensselaer Polytechnic Institute
, Troy, NY 12180
Search for other works by this author on:
Santosh Krishnamurthy
Department of Mechanical, Aerospace, and Nuclear Engineering,
Rensselaer Polytechnic Institute
, Troy, NY 12180
Yoav Peles
Department of Mechanical, Aerospace, and Nuclear Engineering,
Rensselaer Polytechnic Institute
, Troy, NY 12180J. Heat Transfer. Apr 2010, 132(4): 041007 (10 pages)
Published Online: February 19, 2010
Article history
Received:
November 24, 2008
Revised:
September 30, 2009
Online:
February 19, 2010
Published:
February 19, 2010
Citation
Krishnamurthy, S., and Peles, Y. (February 19, 2010). "Flow Boiling Heat Transfer on Micro Pin Fins Entrenched in a Microchannel." ASME. J. Heat Transfer. April 2010; 132(4): 041007. https://doi.org/10.1115/1.4000878
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