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TECHNICAL PAPERS

Flow Past a Spinning Sphere With Surface Blowing and Heat Transfer

[+] Author and Article Information
H. Niazmand, M. Renksizbulut

Mechanical Engineering Department, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1

J. Fluids Eng 127(1), 163-171 (Mar 22, 2005) (9 pages) doi:10.1115/1.1852471 History: Received November 02, 2003; Revised September 20, 2004; Online March 22, 2005
Copyright © 2005 by ASME
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References

Best,  J. L., 1998, “The Influence of Particle Rotation on Wake Stability at Particle Reynolds Numbers, ReP<300—Implications for Turbulence Modulation in Two-Phase Flows,” Int. J. Multiphase Flow, 24, pp. 693–720.
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Tomboulides,  A. G., and Steven,  A. O., 2000, “Numerical Investigation of Transitional and Weak Turbulent Flow Past a Sphere,” J. Fluid Mech., 416, pp. 45–73.
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Kurose,  R., and Komori,  S., 1999, “Drag and Lift Forces on a Rotating Sphere in a Linear Shear Flow,” J. Fluid Mech., 384, pp. 183–206.
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Clift, R., Grace, J. R., and Weber, M. E., 1970, Bubbles, Drops and Particles, Academic, New York.
Eastop,  T. D., 1973, “The Influence of Rotation on the Heat Transfer From a Sphere to an Air Stream,” Int. J. Heat Mass Transfer, 16, pp. 1954–1957.
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Figures

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Flow geometry and coordinates
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Drag coefficient and separation angle histories for an impulsively started solid sphere
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(a)–(b). Streamlines at Re=20: (a) no spin, (b) Ωx=1.
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(a)–(c). Streamlines at Re=100: (a) no spin or blowing, (b) spin only, and (c) spin and blowing.
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Drag coefficient histories at Re=100 for different spinning speeds
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Nusselt number histories at Re=100 for different spinning speeds
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Nusselt number histories at Re=100 for different spinning speeds and surface blowing
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Drag coefficient histories at Re=200 for different spinning speeds and surface blowing
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Lift coefficient histories at Re=200 for different spinning speeds and surface blowing
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Nusselt number histories at Re=200 for different spinning speeds and surface blowing
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Isotherms in one cycle for flow over a spinning sphere at Re=200 with Ωx=1
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(a)–(b). Drag and lift coefficients at Re=250 for different spinning speeds.
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The components of the lift coefficient at Re=250 with Ωx=0.25
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Nusselt number histories at Re=250 for different spinning speeds
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Lift and drag coefficient histories at Re=250 with surface blowing
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(a)–(b). Drag and lift coefficient histories at Re=300 for different spinning speeds.
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Effects of particle spin on the time-averaged lift and drag coefficients at Re=300
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Nusselt number histories at Re=300 for different spinning speeds
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Lift and drag coefficient histories at Re=300 with surface blowing
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Drag coefficient correlation and numerical data
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Heat transfer correlation and numerical data

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