On the effect of surface roughness height, wettability, and nanoporosity on Leidenfrost phenomena
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...
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| Format: | Article |
| Language: | en_US |
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American Institute of Physics
2011
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| Online Access: | http://hdl.handle.net/1721.1/65835 |
| _version_ | 1811074031588212736 |
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| author | Kim, Hyungdae Truong, Bao H. Buongiorno, Jacopo Hu, Lin-Wen |
| author2 | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Kim, Hyungdae Truong, Bao H. Buongiorno, Jacopo Hu, Lin-Wen |
| author_sort | Kim, Hyungdae |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T09:41:40Z |
| format | Article |
| id | mit-1721.1/65835 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:41:40Z |
| publishDate | 2011 |
| publisher | American Institute of Physics |
| record_format | dspace |
| spelling | mit-1721.1/658352022-09-30T16:14:45Z On the effect of surface roughness height, wettability, and nanoporosity on Leidenfrost phenomena Kim, Hyungdae Truong, Bao H. Buongiorno, Jacopo Hu, Lin-Wen Massachusetts Institute of Technology. Department of Nuclear Science and Engineering MIT Nuclear Reactor Laboratory Buongiorno, Jacopo Kim, Hyungdae Truong, Bao H. Buongiorno, Jacopo Hu, Lin-Wen 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. Korean Science and Engineering Foundation (Grant No. 2010-0018761) United States. Dept. of Energy (DOE-NEUP fellowship program) 2011-09-14T15:42:33Z 2011-09-14T15:42:33Z 2011-02 2010-09 Article http://purl.org/eprint/type/JournalArticle 1077-3118 0003-6951 http://hdl.handle.net/1721.1/65835 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. en_US http://dx.doi.org/10.1063/1.3560060 Applied Physics Letters 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. application/pdf American Institute of Physics AIP |
| spellingShingle | Kim, Hyungdae Truong, Bao H. Buongiorno, Jacopo Hu, Lin-Wen On the effect of surface roughness height, wettability, and nanoporosity on Leidenfrost phenomena |
| title | On the effect of surface roughness height, wettability, and nanoporosity on Leidenfrost phenomena |
| title_full | On the effect of surface roughness height, wettability, and nanoporosity on Leidenfrost phenomena |
| title_fullStr | On the effect of surface roughness height, wettability, and nanoporosity on Leidenfrost phenomena |
| title_full_unstemmed | On the effect of surface roughness height, wettability, and nanoporosity on Leidenfrost phenomena |
| title_short | On the effect of surface roughness height, wettability, and nanoporosity on Leidenfrost phenomena |
| title_sort | on the effect of surface roughness height wettability and nanoporosity on leidenfrost phenomena |
| url | http://hdl.handle.net/1721.1/65835 |
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