On the effect of surface roughness height, wettability, and nanoporosity on Leidenfrost phenomena
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Author(s)
Kim, Hyungdae
Truong, Bao H.
Buongiorno, Jacopo
Hu, Lin-Wen
Date Issued
February 2011
Journal
Applied Physics Letters
Publisher
American Institute of Physics
Citation
Kim, Hyungdae et al. “On the effect of surface roughness height, wettability, and nanoporosity on Leidenfrost phenomena.” Applied Physics Letters 98 (2011): 083121. © 2011 American Institute of Physics.
Version
Final published version
Abstract
In recent quenching heat transfer studies of nanofluids, it was found that deposition of nanoparticles on a surface raises its Leidenfrost point (LFP) considerably [ Kim et al., Int. J. Multiphase Flow 35, 427 (2009) and Kim et al., Int. J. Heat Mass Transfer 53, 1542 (2010) ]. To probe the physical mechanism underlying this observation, the effects of surface properties on LFP of water droplets were studied, using custom-fabricated surfaces for which roughness height, wettability, and porosity were controlled at the nanoscale. This approach reveals that nanoporosity is the crucial feature in efficiently increasing the LFP by initiating heterogeneous nucleation of bubbles during short-lived solid-liquid contacts, which results in disruption of the vapor film.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
MIT Nuclear Reactor Laboratory
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.3560060
