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TECHNICAL PAPERS

Velocity Measurements of Vortex Breakdown in an Enclosed Cylinder

[+] Author and Article Information
Kazuyuki Fujimura, Hiroaki Yoshizawa, Reima Iwatsu, Hide S. Koyama

Department of Mechanical Engineering, Tokyo Denki University, 2-2 Kanda-Nishikicho, Chiyodaku, Tokyo 101-8457, Japan

Jae Min Hyun

Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 400, Kusong-dong, Yusong-gu, Taejon 305-701, Korea

J. Fluids Eng 123(3), 604-611 (Apr 17, 2001) (8 pages) doi:10.1115/1.1385834 History: Received February 01, 2000; Revised April 17, 2001
Copyright © 2001 by ASME
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References

Figures

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Schema of the overall experimental apparatus
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(Re-Ar) regime diagram of vortex breakdown. The solid lines and dashed line represent the results of Escudier, and symbols denote the present data. (Uncertainty in Ar: less than ±0.5 percent; in Re: less than ±1 percent.)
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Distributions of (a) axial velocity component w on the axis, (b) flow visualization and velocity vector plots in the meridional plane and (c) contour plots of stream function ψ. Ar=2.50 and Re=1.01×103. Contour values for ψ are ψ=ψmax(i/10)3,i=0,1,[[ellipsis]], 10,ψmin(i/20)3,i=0,1,[[ellipsis]], 20. (Uncertainty in each velocity component: less than ±3 percent.)
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Same as in Fig. 3. Ar=2.50 and Re=2.20×103. (Uncertainty: see Fig. 3 caption.)
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Same as in Fig. 3. Ar=1.50 and Re=0.99×103. (Uncertainty: see Fig. 3 caption.)
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Same as in Fig. 3. Ar=1.50 and Re=1.29×103. (Uncertainty: see Fig. 3 caption.)
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Same as in Fig. 3. Ar=1.50 and Re=2.18×103. (Uncertainty: see Fig. 3 caption.)
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Radial profiles of azimuthal velocity component v/ΩR at selected vertical levels. (a) Ar=2.50 and Re=1.01×103, (b) Ar=2.50 and Re=2.20×103, (c) Ar=1.50 and Re=0.99×103 and (d) Ar=1.50 and Re=1.29×103. (Uncertainty in v/ΩR: less than ±3 percent.)
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Contour plots of circulation (rv/ΩR2). (a) Ar=2.50 and Re=1.01×103, (b) Ar=2.50 and Re=2.20×103, (c) Ar=1.50 and Re=0.99×103 and (d) Ar=1.50 and Re=1.29×103. (Uncertainty in rv/ΩR2: less than ±3 percent.)
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Radial profiles of azimuthal velocity component v/ΩR near the rotating disk. (a) Ar=2.50 and Re=1.01×103, (b) Ar=2.50 and Re=2.20×103, (c) Ar=1.50 and Re=0.99×103, and (d) Ar=1.50 and Re=1.29×103 and (e) Ar=1.50 and Re=2.18×103. Similarity solutions are shown in dashed lines. (Uncertainty in v/ΩR: less than ±3 percent.)
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Radial profiles of radial velocity component u/ΩR near the rotating disk. The values of Ar and Re are the same as in Fig. 10. Similarity solutions are shown in dashed lines. (Uncertainty in u/ΩR: less than ±3 percent.)
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Radial profiles of axiall velocity component w/ΩR near the rotating disk. The values of Ar and Re are the same as in Fig. 10. (Uncertainty in w/ΩR: less than ±3 percent.)

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