Drag Coefficients of Viscous Spheres at Intermediate and High Reynolds Numbers

[+] Author and Article Information
Zhi-Gang Feng, Efstathios E. Michaelides

School of Engineering and Center for Bioenvironmental Research, Tulane University, New Orleans, LA 70118

J. Fluids Eng 123(4), 841-849 (May 20, 2001) (9 pages) doi:10.1115/1.1412458 History: Received October 05, 2000; Revised May 20, 2001
Copyright © 2001 by ASME
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Schematic diagram of the viscous sphere translating in a fluid.
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(a) Streamlines and vorticity field for λ=7 and Re=10; (b) streamlines and vorticity field for λ=7 and Re=100; (c) streamlines and vorticity field for λ=7 and Re=500.
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The vorticity field for Re=500,λ=0.1, with mesh size 120×40 for the internal and 120×180 for the external flow field. The upper half shows the results from the conventional method and the lower half from the method presented here.
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Drag coefficients for the whole range of λ in terms of log(Re)
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The effect of the computational grid used on the vorticity field developed at Re=500: (a) Conventional method, (b) 40 internal grid points, (c) 120 internal grid points




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