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  1. 紀要論文
  2. 琉球大学理工学部紀要 理学編
  3. 20号
  1. 部局別インデックス
  2. 理学部

Observation on the Vortex Rings

http://hdl.handle.net/20.500.12000/23529
http://hdl.handle.net/20.500.12000/23529
b33afe0c-5458-4aa5-baf0-23c923118116
名前 / ファイル ライセンス アクション
No20p015.pdf No20p015.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2012-02-28
タイトル
タイトル Observation on the Vortex Rings
言語 en
作成者 Igei, Ryokan

× Igei, Ryokan

en Igei, Ryokan

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
内容記述
内容記述タイプ Other
内容記述 Observation was made on the vortex rings produced by ejecting dyed water into transparent water from a circular orifice of a glass tube of 0.75 cm in diameter. The translational velocity of the ring at the eight-diameter distance (6.0 cm) was used for the calculation of the Reynolds number. First, the graphs of the translational velocity vs. distance traveled by the ring plotted on semi -log paper indicate that in the later stage of the motion there exists an exponential type of dependence of the velocity on the distance, v" - exp ( - k y), the value of k depending on the Reynolds number, with k decreasing as the Reynolds number increases. Next, from the relation between the velocity and time elapsed plotted on log-log paper, it is found that when the power law approximation, v - t ^<-b>, is adopted for the later part of the motion, the value of bapproximately equals to 1 for each ring regardless the Reynolds number. Finally, our result suggeststs a linear relationship between the maximum distance traveled by the ring before its breakdown and the Reynolds number.
内容記述
内容記述タイプ Other
内容記述 紀要論文
出版者
言語 ja
出版者 琉球大学理工学部
出版者
言語 en
出版者 Science and Engineering Division, University of the Ryukyus
言語
言語 eng
資源タイプ
資源タイプ departmental bulletin paper
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
出版タイプ
出版タイプ NA
出版タイプResource http://purl.org/coar/version/c_be7fb7dd8ff6fe43
識別子
識別子 http://hdl.handle.net/20.500.12000/23529
識別子タイプ HDL
収録物識別子
収録物識別子タイプ NCID
収録物識別子 AN0025080X
収録物名
言語 ja
収録物名 琉球大学理工学部紀要. 理学編
収録物名
言語 en
収録物名 Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences
書誌情報
号 20, p. 15-22, 発行日 1975-09-01
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