Development of prediction technology of two-phase flow dynamics under earthquake acceleration
地震加速度付加時の二相流挙動に対する予測技術の開発
吉田 啓之; 永武 拓; 高瀬 和之; 金子 暁子*; 文字 秀明*; 阿部 豊*
Yoshida, Hiroyuki; Nagatake, Taku; Takase, Kazuyuki; Kaneko, Akiko*; Monji, Hideaki*; Abe, Yutaka*
In this study, to develop the predictive technology of two-phase flow dynamics under earthquake acceleration, a detailed two-phase flow simulation code with an advanced interface tracking method TPFIT was expanded. In addition, the bubbly flow in a horizontal pipe excited by oscillation acceleration and under the fluctuation of the liquid flow was simulated by using the modified TPFIT. In the results, it was confirmed that the modified TPFIT can predict time dependent velocity distribution around the bubbles and shapes of bubbles qualitatively. The main cause of bubble deformation observed is large shear stress at the lower part of the bubble, and this large shear stress is induced by the velocity difference between the liquid phase and bubble. Moreover, we discussed about the difference between both effects of flow rate fluctuation and structure vibration on two-phase flow. In the results, bubble acceleration of the structure vibration case was larger than that of the flow rate fluctuation case. Finally, it was concluded that unsteady shear stress induced by vibration of the pipe wall was one of the main driving forces of bubble motion in structure vibration case.
使用言語 : English
掲載資料名 : Mechanical Engineering Journal (Internet)
: 1
: 4
ページ数 : p.TEP0025_1 - TEP0025_11
発行年月 : 2014/08
出版社名 : 日本機械学会
特許データ :
PDF :
論文URL :
キーワード : Earthquake acceleration; Two-phase flow; Interface tracking method; Computational fluid dynamics; TPFIT; Oscillating flow; 福島第一原子力発電所事故; Fukushima Daiichi Nuclear Power Station Accident
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論文解説記事
(成果普及情報誌)
:
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登録番号 : AA20140218
抄録集掲載番号 : 42001111
論文投稿番号 : 14755
Accesses  (From Jun. 2, 2014)
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