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Void fraction distributions of inert gas jets across a single cylinder with non-wetting surface in liquid sodium
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)
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Submitter: 工藤 秀行
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