Visualization of boiling structure and critical heat flux phenomenon for a narrow heating surface in a horizontal pool of saturated water

Cited 45 time in webofscience Cited 0 time in scopus
  • Hit : 35
  • Download : 0
A visualization study was performed to identify the near-surface boiling structure and critical heat flux (CHF) triggering mechanism in a horizontal pool boiling of saturated water using a narrow transparent ITO heating surface. Total reflection and diagonal inside view techniques were applied in a synchronized manner. Contrary to the common postulation that a thin liquid film exists under a coalesced massive bubble, the base of a coalesced massive bubble is almost dry under the conditions studied. Approaching the CHF, a small dry area is left on a boiling surface at the departure of the coalesced massive bubble. Rather than being wetted, the small residual dry area expands to a large dry area if the bubble nucleation around the residual dry area is sufficiently vigorous. This re-expansion repeats throughout consecutive departures of coalesced massive bubbles as wall superheat further increases. Then, a certain part of the residual dry area is not wetted for a sufficient time and evolves into an irreversible hot spot, leading to a boiling crisis. (C) 2013 Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2013-07
Language
English
Article Type
Article
Keywords

BUBBLE-GROWTH; CHF; MECHANISM; BURNOUT; CRISIS; MODEL

Citation

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v.62, pp.142 - 152

ISSN
0017-9310
DOI
10.1016/j.ijheatmasstransfer.2013.02.067
URI
http://hdl.handle.net/10203/254786
Appears in Collection
NE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 45 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0