Flow Mechanism of a Submerged Jet Impinging on a Free Interface
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概要
- 論文の詳細を見る
This paper reports time-dependent flow characteristics of a turbulent water jet impinging vertically upward upon a water-air interface. Mexican-hat wavelet transform was applied to the time-dependent velocity fluctuations obtained in the region near to the air-water interface in order to analyze spatiotemporal turbulent structure at different time scales. The further understanding of the physical meanings of the wavelet transforms was tried by the analysis using logarithmic expectation and information entropy of information theory. It has been found that the near-interface turbulent structure is constituted not only by the impingement of the large-scale structure of the approaching turbulent jet but also by the time-dependent deformation of the surface bump. Time-series images of the surface bump visualized by an argon laser sheet technique showed some periodical regulation of the surface bump coming from the large-scale structure of the impinging jet.
- 社団法人 化学工学会の論文
著者
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大村 直人
神戸大学大学院工学研究科
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OHMURA Naoto
Department of Chemical Science and Engineering, Kobe University
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KATAOKA Kunio
Department of Chemical Science and Engineering, Kobe University
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片岡 邦夫
Department Of Chemical Science And Engineering Kobe University
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片岡 邦夫
神戸大学工学部
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Ohmura Naoto
Department Of Chemical Science And Engineering Kobe University
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OCHI Takayuki
Department of Chemical Science and Engineering, Kobe University
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YOSHIMURA Tokuo
Department of Chemical Science and Engineering, Kobe University
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ZHENG Jianxing
Division of Resource and Energy Science, Graduate School of Science and Technology, Kobe University
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KISHIMOTO Shinya
Mitsubishi Heavy Industries, Ltd.
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Ochi Takayuki
Department Of Chemical Science And Engineering Kobe University
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Zheng Jianxing
Division Of Resource And Energy Science Graduate School Of Science And Technology Kobe University
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Kataoka Kunio
Department Of Chemical Engineering Kobe University
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Kishimoto Shinya
Mitsubishi Heavy Industries Ltd.
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Yoshimura T
Department Of Chemical Science And Engineering Kobe University
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Yoshimura Tokuo
Department Of Chemical Science And Engineering Kobe University
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Ohmura Naoto
Department Of Chemical Science And Engineering Graduate School Of Engineering Kobe University
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