Effects of Sediment Transport on Bed Friction and Turbulence
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Volume 124, Issue 4
Abstract
The effects of sediment transport on the fluid velocities and turbulence in oscillatory flow were investigated with the aid of a laser Doppler anemometer (LDA). Measurements were made over flat beds in an oscillatory flow water tunnel with gradually increasing quantities of sediment. The sediment had a specific gravity of 1.137 and a median diameter of 4.0 mm. It was observed that the turbulence intensity at any given height above the initial bed level was less in flows with sediment motion than over a fixed bed provided the bed remained flat. The initial bed level is defined as the mean grain crest level if all sediment settles on the bed. The friction factor and energy dissipation factor at the initial bed level were also reduced by the addition of sediment provided the bed remained flat. On the other hand, the values of friction factor and energy dissipation factor at the bottom of the mobile layer of sediment were greater than the values for a fixed bed.
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References
1.
Bakker, W. T., and Van Doorn, T. (1978). “Near bottom velocities in waves with a current.”Proc., 16th Int. Conf. on Coast. Engrg., ASCE, Reston, Va., 1394–1413.
2.
Best, J., Bennett, S., Bridge, J., and Leeder, J.(1997). “Turbulence modulation and particle velocities over flat sand beds at low transport rates.”J. Hydr. Engrg., ASCE, 123, 1118–1129.
3.
Dick, J. E., and Sleath, J. F. A.(1991). “Velocities and concentrations in oscillatory flow over beds of sediment.”J. Fluid Mech., Cambridge, England, 233, 165–196.
4.
Du Toit, C. G., and Sleath, J. F. A.(1981). “Velocity measurements close to rippled beds in oscillatory flow.”J. Fluid Mech., Cambridge, England, 112, 71–96.
5.
Elata, C., and Ippen, A. T. (1961). “Dynamics of open-channel flow with suspensions of neutrally buoyant particles.”Tech. Rep. No. 45, MIT, Cambridge, Mass.
6.
Fredsoe, J.(1984). “Turbulence boundary layer in wave-current motion.”J. Hydr. Engrg., ASCE, 110(8), 1103–1120.
7.
Gore, R. A., and Crowe, C. T.(1989a). “Effect of particle size on modulating turbulent intensity.”Int. J. Multiphase Flow, 15, 279–285.
8.
Gore, R. A., and Crowe, C. T.(1989b). “Effect of particle size on modulating turbulent intensity: Influence of radial location.”Turbulence modification in dispersed multiphase flows, E. E. Michaelides and D. E. Stock, eds., ASME FED, 80, 31–35.
9.
Hetsroni, G.(1989). “Particle-turbulence interaction.”Int. J. Multiphase Flow, 5, 735–746.
10.
Hetsroni, G. (1993). “The effect of particles on the turbulence in a boundary layer.”Particulate two-phase flow, M. C. Roco, ed., Butterworth-Heinemann, Stoneham, Mass., 244–264.
11.
Jensen, B. L., Sumer, B. M., and Fredsoe, J.(1989). “Turbulent oscillatory boundary layers at high Reynolds numbers.”J. Fluid Mech., Cambridge, England, 206, 265–297.
12.
Jonsson, I. G. (1963). “Measurements in the turbulent wave boundary layer.”Proc., 10th Congr. IAHR, Int. Assn. for Hydr. Res., 85–92.
13.
Jonsson, I. G., and Carlsen, N. A.(1976). “Experimental and theoretical investigation in an oscillatory turbulent boundary layer.”J. Hydr. Res., 14(1), 45–60.
14.
Justesen, P.(1988). “Prediction of turbulent oscillatory flow over rough beds.”Coastal Engrg., 12, 257–284.
15.
Kamphuis, J. W.(1975). “Friction factors under oscillatory waves.”J. Wtrwy., Harb. and Coast. Engrg. Div., ASCE, 101(2), 135–144.
16.
Kulick, J. D., Fessler, J. R., and Eaton, J. K. (1993). “On the interactions between particles and turbulence in a fully developed channel flow in air.”Rep. MD-66, Thermosciences Div., Dept. of Mech. Engrg., Stanford Univ., Calif., 1–195.
17.
Kulick, J. D., Fessler, J. R., and Eaton, J. K.(1994). “Particle response and turbulence modification in a fully developed channel flow.”J. Fluid Mech., Cambridge, England, 277, 109–134.
18.
Lyn, D. A.(1991). “Resistance in flat-bed sediment-laden flows.”J. Hydr. Engrg., ASCE, 117, 94–114.
19.
Nielsen, P.(1986). “Suspended sediment concentrations under waves.”Coast. Engrg., 10, 23–31.
20.
Rashidi, M., Hetsroni, G., and Banerjee, S.(1990). “Particle-turbulence interaction in a boundary layer.”Int. J. Multiphase Flow, 6, 935–949.
21.
Rogers, C. B., and Eaton, J. K.(1991). “The effect of small particles on fluid turbulence in a flat-plate turbulent boundary layer in air.”Phys. Fluids, A, 3, 928–937.
22.
Simons, R. R., Grass, A. J., and Kyriacou, A. (1988). “The influence of currents on wave attenuation.”Proc., 21st Int. Conf. on Coast. Engrg., ASCE, Reston, Va., 363–376.
23.
Sleath, J. F. A.(1982). “The effect of jet formation on the velocity distribution in oscillatory flow over flat beds of sand or gravel.”Coast. Engrg., 6, 151–177.
24.
Sleath, J. F. A.(1987). “Turbulent oscillatory flow over rough beds.”J. Fluid Mech., Cambridge, England, 182, 369–409.
25.
Tanaka, H., and Shuto, N.(1984). “Friction laws and flow regimes under wave and current motion.”J. Hydr. Res., 22(4), 245–261.
26.
Tsuji, Y., and Morikawa, Y.(1982). “LDV measurements of an air-solid two-phase flow in a horizontal pipe.”J. Fluid Mech., Cambridge, England, 120, 385–409.
27.
Tsuji, Y., Morikawa, Y., and Shiomi, H.(1984). “LDV measurements of an air-solid two-phase flow in a vertical pipe.”J. Fluid Mech., Cambridge, England, 139, 417–434.
28.
Vanoni, V. A. (1953). “Some effects of suspended sediment on flow characteristics.”Proc., 5th Hydr. Conf., Bull. 34, State Univ. of Iowa Studies in Engineering, Iowa.
29.
Vanoni, V. A., and Nomincos, G. N.(1960). “Resistance properties of sediment-laden structures.”Trans. Am. Soc. Civ. Engrs., 125, 140–1167.
30.
Wang, Z., and Larsen, P.(1984). “Turbulent structure of water and clay suspensions with bed load.”J. Hydr. Engrg., ASCE, 120, 577–600.
31.
Wijetunge, J. J. (1997). “Velocity measurements in oscillatory and steady flows,” PhD dissertation, Cambridge Univ., Cambridge, England.
32.
Wilson, K. C.(1987). “Analysis of bed-load motion at high shear stress.”J. Hydr. Engrg., ASCE, 113, 97–103.
33.
Wilson, K. C.(1989). “Mobile-bed friction at high shear stress.”J. Hydr. Engrg., ASCE, 115, 825–830.
34.
Wilson, K. C., and Nnadi, F. N. (1990). “Behaviour of mobile beds at high shear stress.”Proc., 22nd Int. Conf. on Coast. Engrg., ASCE, Reston, Va., 2536–2541.
35.
Xingkui, W., and Ning, Q.(1989). “Turbulence characteristics of sediment-laden flow.”J. Hydr. Engrg., ASCE, 115, 781–800.
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Copyright © 1998 American Society of Civil Engineers.
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Published online: Jul 1, 1998
Published in print: Jul 1998
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