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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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Visualization of a principle mechanism of critical heat flux in pool boiling

Cited 12 times inthomson ciCited 13 times inthomson ci
Title
Visualization of a principle mechanism of critical heat flux in pool boiling
Author
Bang, In CheolChang, SHBaek, WP
Issue Date
2005-12
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v.48, no.25-26, pp.5371 - 5385
Abstract
A new experimental work was made to discover a principle mechanism of the burnout in pool boiling. Here, we directly observed a liquid layer structure under a massive vapor clot and the liquid layer-related burnout phenomenon. Based on the present observations, we have made a visual model for the formation and dryout of a liquid film under its vapor environment. At the formation process, liquid is trapped in interleaved space between growing bubbles and surface and the liquid trapping continues between coalesced bubbles and surface. In the dryout process, we especially observed vapor "holes" made by spontaneous breakup of discrete nucleating bubbles inside a vapor clot. The burnout can be triggered by the evaporation of the liquid film region expanded from rims of the holes.
URI
https://scholarworks.unist.ac.kr/handle/201301/7270
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=27844444293
DOI
10.1016/j.ijheatmasstransfer.2005.07.006
ISSN
0017-9310
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