Drift Velocity Concept for Sediment-Laden Flows
Publication: Journal of Hydraulic Engineering
Volume 124, Issue 10
Abstract
The vertical distribution of suspended sediment concentration in open channel flows is usually described by the advection-diffusion equation. Hence, only the mechanisms of advection and diffusion affect the movement of sediment particles. However, recent publications show that the equation could not describe fully the sediment concentration distribution in open channels. A new model for particle migration in sediment-laden turbulent flow is presented. The model assumes there is an additional mechanism influencing the particle movement in sediment-laden flows. A new mechanism, which is called the drift, acts independently of advection and turbulent diffusion. Based on all three mechanisms, a new equation for the concentration distribution is derived. The equation describes the vertical distribution of sediment concentration more accurately than the advection-diffusion equation.
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References
1.
Coleman, N. L.(1981). “Velocity profiles with suspended sediment.”J. Hydr. Res., ASCE, 19(3), 211–229.
2.
Coleman, N. L.(1986). “Effect of suspended sediment on the open channel velocity distribution.”Water Resour. Res., 22, 1377–1384.
3.
Czernuszenko, W. (1990). “Dispersion of pollution in flowing surface waters.”Encyclopedia of fluid mechanics, Gulf Publishing Co., Book Div., Houston, Tex., 119–169.
4.
Elghobashi, S.(1994). “On predicting particle-laden turbulent flows.”Appl. Scientific Res., The Hague, The Netherlands, 52, 309–329.
5.
Hinze, J. O. (1975). Turbulence. McGraw-Hill Inc., New York, N.Y., 460–471.
6.
Lee, S. L., and Durst, F.(1982). “On the motion of particles in turbulent duct flows.”Int. J. Multiphase Flow, 8(2), 125–146.
7.
Lee, S. L., and Wiesler, M. A.(1987). “Theory on transverse migration of particles in a turbulent two-phase suspension flow due to turbulent diffusion.”Int. J. Multiphase Flow, 13(1), 99–111.
8.
Lyn, D. A.(1988). “A similarity approach to open-channel sediment-laden flows in open channels.”J. Fluid Mech., Cambridge, England, 193, 1–26.
9.
Nezu, I., and Rodi, W.(1986). “Open-channel flow measurements with a laser Doppler anemometer.”J. Hydr. Engrg., ASCE, 112(5), 335–355.
10.
Petkovic, S., and Bouvard, M. (1982). “Turbulent diffusion of solid particles in open channel flow.”Proc., Mech. of Sediment Transport, Euromech 156, 161–164.
11.
Rowinski, P. (1994). “Transport of solid particles in turbulent water flows,” PhD dissertation, Inst. of Geophysics PAS, Warsaw, Poland, 27–52 (in Polish).
12.
van Rijn, L. C.(1984). “Sediment transport. II: Suspended load transport.”J. Hydr. Engrg., ASCE, 110(11), 1613–1641.
13.
van Rijn, L. C. (1987). Mathematical modelling of morphological processes in the case of suspended sediment transports. Delft, The Netherlands, 2–99.
14.
Wang, X., and Qian, N.(1989). “Turbulence characteristics of sediment-laden flow.”J. Hydr. Engrg., ASCE, 115(6), 781–800.
15.
Wiberg, P. L., and Smith, J. D. (1985). “A theoretical model for saltating grains in water.”J. Geophysical Res., 90(C4), 7341–7354.
16.
Woo, H. S., Julien, P. Y., and Richardson, E. V.(1988). “Suspension of large concentration of sands.”J. Hydr. Engrg., ASCE, 114(8), 888–897.
17.
Yokosi, S. (1967). “The structure of river turbulence.”Bull. Disas. Prev. Res. Inst. Kyoto Univ., 17(121), Part 2, 1–29.
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Copyright © 1998 American Society of Civil Engineers.
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Published online: Oct 1, 1998
Published in print: Oct 1998
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