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TECHNICAL PAPERS

Flow Past Rotating Cylinders: Effect of Eccentricity

[+] Author and Article Information
S. Mittal

Department of Aerospace Engineering, Indian Institute of Technology, Kanpur, UP 208 016, Indiae-mail: smittal@iitk.ac.in

J. Appl. Mech 68(4), 543-552 (Nov 29, 2000) (10 pages) doi:10.1115/1.1380679 History: Received August 07, 2000; Revised November 29, 2000
Copyright © 2001 by ASME
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References

Figures

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Description of the eccentricity (e) of the rotating cylinder. The geometric center of the cylinder is at O while its axis of spin passes through R.
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Re=103,α=0.5 flow past a rotating cylinder: comparison of the instantaneous streamline patterns at various time instants from the present computations and those from Badr et al. 8
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Re=5,200 and 3800, α=5.0 flow past a rotating cylinder: streamlines for the steady-state solution. The potential flow solution is also shown for comparison.
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Re=5, 200 and 3800, α=5.0 flow past a rotating cylinder: variation of the x-component of velocity along normals located at the uppermost and lowest points on the cylinder. The potential flow solution is also shown for comparison.
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Re=5, 200 and 3800, α=5.0 flow past a rotating cylinder: vorticity field for the steady-state solution
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Re=200, 3800, α=5.0, e=0.005 D flow past an eccentrically rotating cylinder: time-histories of the lift and drag coefficients
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Re=200, α=5.0 flow past an eccentrically rotating cylinder: close-up of the time histories of the lift and drag coefficients for various values of the eccentricity
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Re=200, α=5.0 flow past an eccentrically rotating cylinder: summary of the aerodynamic coefficients for different values of the eccentricity
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Re=200, α=5.0 flow past an eccentrically rotating cylinder: vorticity field at four time instants during one period of rotation for the temporally periodic solution. The frames in the various rows from top to bottom correspond to the time instants when the geometric center of the cylinder is at its left-most, bottom-most, right-most, and top-most location, respectively, with respect to the center of rotation. The clockwise vorticity is shown in broken lines while the counterclockwise component is shown in solid lines.
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Re=3800, α=5.0, e=0.005 D flow past an eccentrically rotating cylinder: vorticity, pressure, and magnitude of velocity fields for the temporally periodic solution when the geometric center of the cylinder is at its left-most location with respect to the center of rotation

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