Time-Dependent Flow Properties in Doubly Periodic and Weakly Turbulent Wavy Vortex Flows in a Taylor-Couette Flow System
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概要
- 論文の詳細を見る
The purpose of the present work is to investigate time-dependent flow properties in doubly periodic and weakly turbulent wavy vortex flows in a Taylor–Couette flow system with the aid of a wavelet analysis. Time series data of fluctuating tangential velocity were obtained with a fiberoptic laser-Doppler velocimeter. To clarify the dependence of time-fluctuation flow properties on spatial location, the velocity was measured at many positions within each vortex. In order to estimate wavelet correlation patterns, logarithmic expectation and information entropy were calculated at each time scale. The wavelet patterns revealed that the time-fluctuation properties depend not only on the spatial location but also on time. The continuous wavelet transform analysis can provide a promising technique to reveal the fractal structure of a chaotic wavy vortex flow.
- 社団法人 化学工学会の論文
- 2004-04-01
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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AOKI Tadashi
Department of Chemical Science and Engineering, Kobe University
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OKAMOTO Hirokazu
Department of Chemical Science and Engineering, Kobe University
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KATAOKA Kunio
Kansai Chemical Engineering Co., Ltd.
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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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Okamoto Hirokazu
Department Of Chemical Science And Engineering Kobe University
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Kataoka Kunio
Kansai Chemical Engineering Co. Ltd.
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Aoki Tadashi
Department Of Chemical Science And Engineering Kobe University
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Aoki Tadashi
Department Of Anesthesiology St. Marianna University School Of Medicine
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Ohmura Naoto
Department Of Chemical Science And Engineering Graduate School Of Engineering Kobe University
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