Fall Velocity of Particles in Oscillating Flow
Publication: Journal of Hydraulic Engineering
Volume 111, Issue 3
Abstract
The paper presents results of harmonic analysis in studying particle motion in oscillating flows. An approximate equation is derived to solve the zeroth harmonic equation, which governs the effective fall velocity of particles in oscillating flows. The equation reveals that the drag force on the particles is significantly modified by the instantaneous relative velocity between particles and fluids. Three major factors that govern the variation of (as compared to the terminal velocity in still water are the terminal velocity Reynolds number, the phase lag, and the velocity amplitudes of the flow and particle oscillations. The dimensionless equation is given. Applying to the sediment suspension under wave action, the analysis suggests that an enhancement of suspension should occur.
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References
1.
Bhattacharya, P., “Sediment Suspension in Shoaling Waves,” thesis presented to the University of Iowa, at Iowa City, Iowa, in 1971, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
2.
Clift, R., Grace, J. R., and Weber, M. E., Bubbles, Drops and Particles, Academic Press, New York, N.Y., 1978.
3.
Daily, J. W., and Harleman, D. R. F., Fluid Dynamics, Addison‐Wesley Publishing Company, Inc., Reading, Mass., 1966.
4.
Graf, W. H., Hydraulics of Sediment Transport, McGraw‐Hill, New York, N.Y., 1971.
5.
Ho, H. W., “Fall Velocity of a Sphere in a Field of Oscillating Fluid,” thesis presented to the State University of Iowa, at Iowa City, Iowa, in 1964, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
6.
Hwang, P. A., “Wave Kinematics and Sediment Suspension at Wave Breaking Point,” Technical Report No. 13, presented to the University of Delaware, at Newark, Delaware, in 1982, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
7.
Jonsson, I. G., “Wave Boundary Layer and Friction Factor,” Tenth Coastal Engineering Conference, ASCE, Chapter 10, 1976.
8.
Jonsson, I. G., and Carlson, N. A., “Experimental and Theoretical Investigation in an Oscillating (Rough) Turbulent Boundary Layer,” Journal of Hydraulic Research, Vol. 14, No. 1, 1976, pp. 45–60.
9.
Kana, T. W., “Surf Zone Measurements of Suspended Sediments,” Proceedings, Sixteenth Coastal Engineering Conference, 1978, pp. 1725–1743.
10.
Kana, T. W., and Ward, L. G., “Nearshore Suspended Sediment Load During Storm and Post‐Storm Condition,” Proceedings, Seventeenth Coastal Engineering Conference, 1980, pp. 1158–1174.
11.
Lee, R. S., “Fall Velocity of Sediment Particles Under Wave Action,” in Chinese, thesis presented to Tien‐Jin University, China, in 1981, in partial fulfillment of the requirements for the degree of Master of Science.
12.
Leonard, J. E., and Brenninkmeyer, B. M., “Storm Induced Periodicities of Suspended Sand Movement,” Proceedings, Sixteenth Coastal Engineering Conference, 1978, pp. 1744–1763.
13.
Murray, S. P., “Simulation of Horizontal Turbulent Diffusion of Particles under Waves,” Eleventh Coastal Engineering Conference, ASCE, 1969, pp. 446–466.
14.
Murray, S. P., “Settling Velocities and Vertical Diffusion of Particles in Turbulent Water,” Journal of Geophysical Research, Vol. 75, No. 9, 1970, pp. 1647–1654.
15.
Nielson, P., “Some Basic Concepts of Wave Sediment Transport,” Serial Report No. 20, Technical University of Denmark, Lyngby, Denmark, 1979.
16.
Nielsen, P., Green, M. O., and Coffey, F. C., “Suspended Sediment under Waves,” Technical Report 82/6, Coastal Study Unit, Department of Geography, University of Sydney, Australia, 1982.
17.
Raudkivii, A. J., Loose Boundary Hydraulics, 2nd Ed., Pergamon Press, New York, N.Y., 1976.
18.
Tooby, P. F., Wick, G. L., and Isaacs, J. D., “The Motion of a Small Sphere in a Rotating Velocity Field: A Possible Mechanism for Suspending Particles in Turbulence,” Journal of Geophysical Research, Vol. 82, No. 15, 1977, pp. 2096–2100.
19.
Vanoni, V. A., ed., Sedimentation Engineering, ASCE, New York, N.Y., 1976.
20.
Wang, H., and Liang, S. S., “Mechanics of Suspended Sediment in Random Waves,” Journal of Geophysical Research, Vol. 80, No. 24, 1975, pp. 3488–3494.
21.
Yalin, M. S., Mechanics of Sediment Transport, 2nd Ed., Pergamon Press, New York, N.Y., 1977.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 111 • Issue 3 • March 1985
Pages: 485 - 502
Copyright
Copyright © 1985 ASCE.
History
Published online: Mar 1, 1985
Published in print: Mar 1985
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