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TECHNICAL PAPERS

Bubble-Driven Convection Around Cylinders Confined in a Channel

[+] Author and Article Information
Yuichi Murai

Division of Mechanical Science, Hokkaido University, N13W8, Kitaku, Sapporo 060-8628, Japan

Phone: +81-11-706-6372, Fax: +81-11-706-7889

e-mail: murai@eng.hokudai.ac.jp

Toshio Sasaki

Fiber Amenity Engineering Course, University of Fukui, Bunkyo 3-9-1, Fukui 910-8507, Japane-mail: toshio-s@fv.mech.fukui-u.ac.jp

Masa-aki Ishikawa

Department of Mechanical System Engineering, The University of the Ryukyus, Senbaru 1, Nishihana 903–0213, Japan e-mail: ishi8614@tec.u-ryuku.ac.jp

Fujio Yamamoto

Fiber Amenity Engineering Course, University of Fukui, Bunkyo 3-9-1, Fukui 910-8507, Japane-mail: yamamoto@fv.mech.fukui-u.ac.jp

J. Fluids Eng 127(1), 117-123 (Mar 22, 2005) (7 pages) doi:10.1115/1.1852478 History: Received May 27, 2003; Revised September 14, 2004; Online March 22, 2005
Copyright © 2005 by ASME
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References

Figures

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Schematic diagram of double rectangular tank
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Equivalent bubble radius versus void fraction
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Photograph of bubble distribution. (a) Circular cylinder. (b) Triangular cylinder.
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Local behavior of bubbles and tracer particles. (a) Liquid velocity vectors obtained by PTV. (b) Pathlines of bubbles and particles.
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Time-averaged void fraction distribution for basic shapes
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Time-averaged void fraction distribution for other shapes
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Effect of cylinder’s shape on the wake area
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Time-averaged void fraction around cylinders
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Velocity vectors of each phase obtained by PTV. (a) Original image. (b) Identification of bubbles. (c) PTV for bubbles. (d) PTV for liquid phase.
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Time-averaged rising velocity of bubbles
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Time-averaged equivalent radius of bubbles
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Time-averaged void fraction and liquid velocity
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Time-averaged void fraction and kinetic energy

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