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Void fraction distributions of inert gas jets across a single cylinder with non-wetting surface in liquid sodium

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/53587

Title: Void fraction distributions of inert gas jets across a single cylinder with non-wetting surface in liquid sodium
Authors: Kudoh, Hideyuki Browse this author
Zhao, Dawei Browse this author
Sugiyama, Ken-ichiro Browse this author
Narabayashi, Tadashi Browse this author →KAKEN DB
Ohshima, Hiroyuki Browse this author
Kurihara, Akikazu Browse this author
Keywords: wetting
non-wetting
two-phase flow
void fraction
liquid sodium
single cylinder
gas jet
Issue Date: 20-Nov-2012
Publisher: Taylor & Francis
Journal Title: Journal of Nuclear Science and Technology
Volume: 49
Issue: 12
Start Page: 1175
End Page: 1185
Publisher DOI: 10.1080/00223131.2012.739019
Abstract: Little work on the void fraction behaviors along structural materials with poor-wettability for liquid metals has been performed. In the present study, void fraction behaviors around a single cylinder with non-wetting surface condition were quantitatively discussed by using a gas jet-cylinder system where the impinging jet flow, the boundary layer flow, the separation flow, and the wake flow appear. One cylinder with a non-wetting surface and two cylinders with a wetting surface were used to vary the wettability for liquid sodium, and void fraction distributions were measured around the cylinders. In the case of wetting condition, void fraction distributions around the cylinder decrease clearly in the backward region of the cylinder, and liquid-rich region is formed due to bubble separation from the cylinder surface. On the other hand, under non-wetting condition, because of two-phase flow without bubble separation on the cylinder surface, void fraction distributions show almost steady values around the cylinder compared to those with wetting surface. The void behaviors on a non-wetting surface were also confirmed by a visualization experiment conducted in water. The observed differences can be basically attributed to the work of adhesion required for liquid-solid interfacial separation.
Rights: This is an Author's Accepted Manuscript of an article published in Journal of Nuclear Science and Technology, Volume 49, Issue 12, 2012, pages 1175-1185, ©2012 Atomic Energy Society of Japan, available online at: http://www.tandfonline.com/10.1080/00223131.2012.739019.
Type: article (author version)
URI: http://hdl.handle.net/2115/53587
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 工藤 秀行

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