ON THE TURBULENT TRANSPORT OF A HETEROGENEOUS SEDIMENT

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Abstract
The transport of sediment in steady turbulent flow is described by means of a diffusion equation. It is shown how the inclusion of sediment volume in the continuity equation leads to a distribution of concentration with depth tending to unity at the bed. With a mixture of grain sizes in suspension, the smaller particles can increase in concentration upwards, while the heavier particles are necessarily transported mainly near the bed, in accordance with observations.

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