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Bang, In Cheol
Nuclear Thermal-Hydraulics & Reactor Safety Lab
Research Interests
  • Nuclear Thermal-Hydraulics
  • Nuclear Safety
  • Nuclear System Design & Analysis
  • Nanofluids
  • Critical Heat Flux

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Experimental observation of the critical heat flux (CHF) enhancement of the nanofluids by the electrical explosion of a wire in liquid

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Title
Experimental observation of the critical heat flux (CHF) enhancement of the nanofluids by the electrical explosion of a wire in liquid
Author
Park, Eun JuBang, In CheolPark, Hyung Wook
Issue Date
2014-12
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v.79, pp.868 - 875
Abstract
In this study, Ag, Cu, and Al2O3 nanofluids were produced from the electrical explosion of a wire in liquid (EEWL). Compared with the two-step method, the various nanofluids manufactured by the EEWL process had higher purity and dispersion states. Pool-boiling experiments of Ag, Cu, and Al2O3 nanofluids were performed to evaluate their critical heat flux (CHF) enhancements, which were 187% at 0.001 vol% for Al2O3, 58% at 0.001 vol% for Ag, and 99% at 0.001 vol% for Cu. The surface of the heating wire was observed using transmission electron microscopy (TEM) and atomic force microscopy (AFM) after pool boiling. The heater surface contained deposited nanoparticles that formed nano/microstructures with different uniformity according to the dispersion state. Build-up of the nanoparticles on the heater surface occurred during nucleate boiling, which improved the surface wettability. The uniformity of the deposited layer contributed to the CHF enhancement.
URI
https://scholarworks.unist.ac.kr/handle/201301/9282
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84907553040
DOI
10.1016/j.ijheatmasstransfer.2014.09.003
ISSN
0017-9310
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