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Influence of Surface Wettability on Pool Boiling Heat Transfer

[+] Author Affiliations
Hai Trieu Phan, Nadia Caney, Philippe Marty, Stephane Colasson, Alain Marechal

CEA-Grenoble, Grenoble, France

Jérôme Gavillet

LTS/CEA-Grenoble, Grenoble, France

Paper No. ICNMM2009-82030, pp. 17-23; 7 pages
doi:10.1115/ICNMM2009-82030
From:
  • ASME 2009 7th International Conference on Nanochannels, Microchannels, and Minichannels
  • ASME 2009 7th International Conference on Nanochannels, Microchannels and Minichannels
  • Pohang, South Korea, June 22–24, 2009
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 978-0-7918-4349-9 | eISBN: 978-0-7918-3850-1
  • Copyright © 2009 by ASME

abstract

Although boiling process has been a major subject of research for several decades, its physics still remain unclear and require further investigation. This study aims at highlighting the effects of the surface wettability on pool boiling heat transfer. Nanocoating techniques were used to vary the water contact angle from 20 to 110° by modifying nanoscale surface topography and chemistry. The experimental results obtained disagree with the predictions of the classical models. A new approach of nucleation mechanism is established to clarify the nexus between the surface wettability and the nucleate boiling heat transfer. In this approach, we introduce the concept of macro- and micro-contact angles to explain the observed phenomenon.

Copyright © 2009 by ASME

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