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Article
Boiling heat transfer on superhydrophilic, superhydrophobic, and superbiphilic surfaces
International Journal of Heat and Mass Transfer
  • Amy Rachel Betz, Kansas State University
  • James Jenkins, University of California - Los Angeles
  • Chang-Jin Kim, University of California - Los Angeles
  • Daniel Attinger, Iowa State University
Document Type
Article
Publication Date
2-1-2013
DOI
10.1016/j.ijheatmasstransfer.2012.10.080
Abstract

With recent advances in micro- and nanofabrication, superhydrophilic and superhydrophobic surfaces have been developed. The statics and dynamics of fluids on these surfaces have been well characterized. However, few investigations have been made into the potential of these surfaces to control and enhance other transport phenomena. In this article, we characterize pool boiling on surfaces with wettabilities varied from superhydrophobic to superhydrophilic, and provide nucleation measurements. The most interesting result of our measurements is that the largest heat transfer coefficients are reached not on surfaces with spatially uniform wettability, but on biphilic surfaces, which juxtapose hydrophilic and hydrophobic regions. We develop an analytical model that describes how biphilic surfaces effectively manage the vapor and liquid transport, delaying critical heat flux and maximizing the heat transfer coefficient. Finally, we manufacture and test the first superbiphilic surfaces (juxtaposing superhydrophobic and superhydrophilic regions), which show exceptional performance in pool boiling, combining high critical heat fluxes over 100 W/cm2 with very high heat transfer coefficients, over 100 kW/m2K.

Comments

NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Heat and Mass Transfer. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Heat and Mass Transfer, [57, 2, (2013)] DOI:10.1016/j.ijheatmasstransfer.2012.10.080.

Copyright Owner
Attinger, et al.
Language
en
File Format
application/pdf
Citation Information
Amy Rachel Betz, James Jenkins, Chang-Jin Kim and Daniel Attinger. "Boiling heat transfer on superhydrophilic, superhydrophobic, and superbiphilic surfaces" International Journal of Heat and Mass Transfer Vol. 57 Iss. 2 (2013) p. 733 - 741
Available at: http://works.bepress.com/daniel_attinger/16/