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Velocity measurements close to the bed in a wave tank

Published online by Cambridge University Press:  29 March 2006

J. F. A. Sleath
J. F. A. Sleath
Affiliation:
Department of Engineering, University of Cambridge
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Abstract

Measurements of the velocity distribution close to the bed have been made under laminar flow conditions in a wave tank. The classical solution for the velocity distribution was found to be valid when the bed was smooth, but considerable deviations between theory and experiment were observed with beds of sand. It is suggested that these deviations were caused by vortex formation around the grains of sand. The similarity between the velocity profiles obtained in these tests and those reported by other writers under supposedly turbulent conditions suggests that even at high Reynolds numbers vortex formation may continue to be the dominant effect in oscillatory boundary layers of this sort.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 42 , Issue 1 , 4 June 1970 , pp. 111 - 123
Copyright
© 1970 Cambridge University Press

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References

Eagleson, P. S. 1959 The damping of oscillatory waves by laminar boundary layers. Beach Erosion Board. T.M. 117.Google Scholar
Horikawa, K. & Watanabe, A. 1968 Laboratory study on oscillatory boundary layer flow. Coastal Engineering in Japan, 11, 13.Google Scholar
Jonsson, I. G. 1963 Measurements in the turbulent wave boundary layer. IAHR Congress, Londo. I 12, 85.Google Scholar
Kalkanis, G. 1957 Turbulent flow near an oscillatory wall. Beach Erosion Board. T.M. 97.Google Scholar
Kalkanis, G. 1964 Transportation of bed material due to wave action. U.S. Army Coastal Eng. Res. Center. T.M. 2.Google Scholar
Lamb, H. 1932 Hydrodynamics (6th ed.). Cambridge University Press.
Lhermitte, P. 1958 Contribution à l’étude de la couche limite des houles progressives. C.O.E.C. no. 136. Paris: Imprimerie Nationale.
Manohar, M. 1955 Mechanics of bottom sediment movement due to wave action. Beach Erosion Board. T.M. 75.Google Scholar
Sleath, J. F. A. 1968 The effect of waves on the pressure in a bed of sand in a water channel and on the velocity distribution above it. Ph.D. Thesis, University of Cambridge.
Sleath, J. F. A. 1969 A device for velocity measurement in oscillatory boundary layers in water. J. Sci. Instrum. (2) 2, 446.Google Scholar
Stokes, G. G. 1851 On the effect of the internal friction of fluids on the motion of pendulums. Trans. Camb. Phil. Soc. 9, 20.Google Scholar
Vincent, G. & Ruellan, F. 1957 Mouvements solides provoqués par la houle sur un fond horizontal. La Houille Blanche, B, 693.Google Scholar