Bedload transport for heterogeneous sediments
نویسندگان
چکیده
منابع مشابه
Bedload transport by a vertical jet impinging upon sediments
Bedload transport by a vertical jet impinging upon sediments Bruce R. Sutherland1,a) and Stuart Dalziel2 1Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada and Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada 2Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3, Unit...
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An exponential formula that does not involve the concept of the critical shear stress is derived in this study for computing bedload transport rates. The formula represents well various experimental data sets ranging from the weak transport to high shear conditions. Comparisons of the present study are also made with many previous bedload formulas commonly cited in the literature.
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Bedload transport generally depends on the bed shear stress and Reynolds number. Many studies conducted for the condition of turbulent flows have revealed the dependence of the transport rate on the bed shear stress, while knowledge of the Reynolds number effect on the transport rate is very limited. As an extreme case to reflect the viscous effect on sediment transport, sediment transport in l...
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The local granular rheology is investigated numerically in turbulent bedload transport. Considering spherical particles, steady uniform configurations are simulated using a coupled fluid-discrete-element model. The stress tensor is computed as a function of the depth for a series of simulations varying the Shields number, the specific density and the particle diameter. The results are analyzed ...
متن کاملEvaluation of bedload transport subject to high shear stress fluctuations
Many formulas available in the literature for computing sediment transport rates are often expressed in terms of time-mean variables such as time-mean bed shear stress or flow velocity, while effects of turbulence intensity, e.g., bed shear stress fluctuation, on sediment transport were seldom considered. This may be due to the fact that turbulence fluctuation is relatively limited in laborator...
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ژورنال
عنوان ژورنال: Environmental Fluid Mechanics
سال: 2014
ISSN: 1567-7419,1573-1510
DOI: 10.1007/s10652-014-9380-1