Numerical simulation of turbulent sediment transport, from bed load to saltation
By Orencio Durán, Bruno Andreotti, P. Claudin. 2011
186 citations recorded by the source corpus.
Sediment transport is studied as a function of the grain to fluid density ratio using two phase numerical simulations based on a discrete element method for particles coupled to a continuum Reynolds averaged description of hydrodynamics. At a density ratio close to unity (typically under water), vertical velocities are so small that sediment transport occurs in a thin layer at the surface of the static bed, and is called bed load. Steady, or “saturated” transport is reached when the fluid borne shear stress at the interface between the mobile grains and the static grains is reduced to its threshold value. The number of grains transported per unit surface is therefore limited by the flux of horizontal momentum towards the surface. However, the fluid velocity in the transport layer remains almost undisturbed so that the mean grain velocity scales with the shear velocity u*. At large density ratio (typically in air), the vertical velocities are large enough to make the transport layer wide and dilute. Sedime...
Subfields: Earth-Surface Processes, Ecology, Soil Science
View Paper: https://www.semanticscholar.org/paper/5eaee7308304ef5bfbe0510f1472b13055d46b52
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Citations in the corpus
- The Physics of Sediment Transport Initiation, Cessation, and Entrainment Across Aeolian and Fluvial Environments (2020, background): “In contrast, in real nonsuspended sediment transport, it monotonously decreases with z, often exponentially [e.g., Durán et al., 2012].”