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Boiling in Enhanced Surface Microchannels

[+] Author Affiliations
Chih-Jung Kuo, Ali Kosar, Michael K. Jensen, Yoav Peles

Rensselaer Polytechnic Institute

Paper No. IMECE2005-82846, pp. 377-384; 8 pages
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Part B
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-4222-3 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME


An experimental investigation is presented on flow boiling of de-ionized water in 227-μm hydraulic diameter microchannels with reentrant type cavities. Key features of nucleate boiling are discussed. Active nucleation site density, bubble frequency and departure diameter, and flow patterns over mass velocities ranging from 41 kg/m2 -s to 302 kg/m2 -s and heat fluxes ranging from 28 to 445 W/cm2 are studied. Similarities and differences with results obtained on large-scale systems and unenhanced microchannels are discussed.

Copyright © 2005 by ASME



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