Inverse Energy Cascade Structure of Turbulence in a Bubby Flow (PIV Measurement and Results)
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概要
- 論文の詳細を見る
The inverse energy cascade,which is one of the important phenomena to enhance the large-scale flow instability in bubbly flow,is investigated by measuring a local two-phase flow structure driven by buoyant bubbles using particle imaging velocimetry (PIV). In PIV,the flow field of liquid phase is measured by separating an original image to respective phase images using a statistical thresholding method for separating image parameters of bubbles and particles. The present results obtained in the case where the bubble Reynolds number and average void fraction are less than 30 and 1.5%,respectively,confirm the large energy decay with a slope index steeper than－5/3 in the log-log diagram of energy spectrum in a high wavenumber region. An important relationship between the energy spectrum and the bubble-bubble interval distance is also detected.
- 社団法人日本機械学会の論文
- 2000-05-15
著者
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Song X
State Univ. New York Ny Usa
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Ishikawa Masa-aki
Nuclear Eng. Res. Labo. The University Of Tokyo
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MURAI Yuichi
Dept. Mech. Eng., Fukui University
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SONG Xiang-qun
Dept. Mech. & Aerospace Eng., State Univ. of New York
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TAKAGI Takashi
Dept. Mech. & Aerospace Eng., State Univ. of New York
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ISHIKAWA Masa-aki
Dept. Mech. Eng., Fukui University
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YAMAMOTO Fujio
Dept. Mech. Eng., Fukui University
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OHTA Junichi
Dept. Mech. Eng., Fukui University
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SONG Xiang-qun
Department of Mechanical Engineering, Fukui University
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Iguchi Manabu
Department Of Mechanical Engineering Fukui University
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Ohta J
Fukui Univ. Fukui Jpn
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Ohta Junichi
Dept. Mech. Eng. Fukui University
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Song X
Department Of Mechanical Engineering Fukui University
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山本 富士夫
福井大学大学院工学研究科ファイバーアメニティ工学専攻
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Song X
Department Of Mechanical And Aerospace Engineering State University Of New York
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Ohta J
Dept. Mech. Eng. Fukui University
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Takagi Takashi
Dept. Mech. & Aerospace Eng. State Univ. Of New York
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