Drag Coefficient and Fall Velocity of nonspherical particles
Publication: Journal of Hydraulic Engineering
Volume 117, Issue 5
Abstract
The most commonly encountered particles in the areas of sediment transport, fluidization, sedimentation, etc. are nonspherical. The role of these particles can be ascertained only through the knowledge of drag coefficient and fall velocity. Graphical relationships for the determination of drag coefficient and fall velocity are available in the literature. The graphical relationships are less accurate because they are subject to errors of judgment. Furthermore, these relationships cannot be used for any analytical purposes. In 1954, Schulz et al. collected extensive data for the drag coefficient and fall velocity of nonspherical particles. Based on these data, empirical equations for the drag coefficient and fall velocity of nonspherical particles of natural and mechanical origin are derived from curve fittings and presented. It is hoped that these equations will find use in the analytical modeling of various engineering problems involving fluid‐nonspherical particles interaction.
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References
1.
Alger, G. R., and Simons, D. B. (1968). “Fall velocity of irregular shaped particles.” J. Hydr. Engrg. Div., ASCE, 94(3), 721–737.
2.
Goldstein, S. (1929). “The steady flow of viscous fluid past a fixed spherical obstacle at small Reynolds numbers.” Proc., Royal Soc., London, England, Vol. 123.
3.
Rouse, H. (1946). Elementary mechanics of fluids. Chapter 8, John Wiley & Sons Inc., New York, N.Y.
4.
Schulz, E. F., Wilde, R. H., and Albertson, M. L. (1954). “Influence of shape on fall velocity of sedimentary particles.” Report prepared for the Missouri River Division, Corps, of Engineers, U.S. Army, through Colorado A&M Research Foundation, Fort Collins, Ill.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 117 • Issue 5 • May 1991
Pages: 660 - 667
Copyright
Copyright © 1991 ASCE.
History
Published online: May 1, 1991
Published in print: May 1991
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