Incipient Motion of Shells and Shell Gravel
Publication: Journal of Hydraulic Engineering
Volume 144, Issue 3
Abstract
Incipient motion of seashells under a unidirectional flow of water in a horizontal open channel over surfaces with differing roughnesses and shell placements is investigated experimentally. Drag and lift forces are measured with strain gauges and, from these measurements, the lift and drag coefficients are inferred. The various shell shapes that are investigated in this study are the Patellogastropoda, commonly known as the limpet shell, and the Mytilus galloprovincialis, commonly known as the blue mussel, as well as fossilized shells and shell fragments obtained through a dredging campaign. The bed shear stresses at incipient motion are measured and determined from an existing model for shells and the results are compared to the measurements and published data. It is indicated that a critical Shields parameter for shells may not always be an appropriate measure to use to estimate the incipient motion of shells.
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References
Alger, G. R., and Simons, D. B. (1968). “Fall velocity of irregular shaped particles.” J. Hydraul. Eng. Div., 94(3), 721–737.
Ali, S. Z., and Dey, S. (2016). “Hydrodynamics of sediment threshold.” Phys. Fluids, 28(7), 075103.
Buffington, J. M. (1999). “The legend of A. F. Shields.” J. Hydraul. Eng., 376–387.
Dey, S. (2001). “Incipient motion of bivalve shells on sand beds under currents.” Proc., 14th Australian Fluid Mechanics Conf., Causal Productions Pty Ltd., Adelaide Univ., Adelaide, Australia, 889–892.
Dey, S. (2003). “Incipient motion of bivalve shells on sand beds under flowing water.” J. Eng. Mech., 232–240.
Hughes, R. L. (2007). “A mathematical determination of von Karman’s constant, .” J. Hydraul. Res., 45(4), 563–566.
Mehta, A. J., and Christensen, B. A. (1983). “Initiation of sand transport over coarse beds in tidal entrances.” Coastal Eng., 7(1), 61–75.
Miedema, S. A., and Ramsdell, R. C. (2011). “Hydraulic transport of sand/shell mixtures in relation with the critical velocity.” Terra et Aqua, 122(Mar), 18–27.
Peysson, Y., Ouriemi, M., Medale, M., Aussillous, P., and Guazzelli, É. (2009). “Threshold for sediment erosion in pipe flow.” Int. J. Multiph. Flow, 35(6), 597–600.
Ramsdell, R. C., and Miedema, S. A. (2010). “Hydraulic transport of sand/shell mixtures.” Proc., WODCON XIX., Beijing.
Recicar, J. N., Pereire, L. A. A., and Hirata, M. H. (2008). “Harmonic oscillations of a circular cylinder moving with a constant velocity in quiescent fluid.” Exacta, 6(1), 65–74.
Shields, A. (1936). “Anwendung der Aehnlichkeitsmechanik und der Turbulenzforschung auf die Geschiebebewegung.” Doktor-Ingenieurs dissertation, Technischen Hochschule, Berlin.
Vanoni, V. A. (1975). Sedimentation engineering, ASCE, New York.
Van Rijn, L. C. (1984). “Sediment transport. I: Bed load transport.” J. Hydraul. Eng., 1431–1456.
Van Rijn, L. C. (1993). Principles of sediment transport in rivers, estuaries and coastal seas, Aqua Publications, Amsterdam, Netherlands.
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Published In
Journal of Hydraulic Engineering
Volume 144 • Issue 3 • March 2018
Copyright
©2017 American Society of Civil Engineers.
History
Received: Dec 14, 2016
Accepted: Aug 24, 2017
Published online: Dec 23, 2017
Published in print: Mar 1, 2018
Discussion open until: May 23, 2018
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