Modelling of sediment suspensions in oscillating grid turbulence

A k– ε model is used to describe the steady state of fine-grained sediments maintained in suspension by purely diffusive turbulence, as generated in oscillating grid turbulence experiments. The behaviour is shown to depend both on the bulk Rouse number Rou 0 and the product of the bulk Rouse number...

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Bibliographic Details
Published in:Fluid dynamics research 2004-08, Vol.35 (2), p.87-106
Main Authors: Michallet, H, Mory, M
Format: Article
Language:English
Subjects:
Coastal and estuarine oceanography
Engineering Sciences
Fluid mechanics
Fluids mechanics
Mechanics
Multiphase and particle laden flows
Physics
Sediment transport
Stratified flows
Turbulence simulation and modelling
Turbulent diffusion
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Summary:A k– ε model is used to describe the steady state of fine-grained sediments maintained in suspension by purely diffusive turbulence, as generated in oscillating grid turbulence experiments. The behaviour is shown to depend both on the bulk Rouse number Rou 0 and the product of the bulk Rouse number and the bulk Richardson number Ri 0 Rou 0 , built on oscillating grid parameters. For Rou 00.01 the mean sediment concentration and turbulence decay simultaneously with increasing distance from the grid, and no sharp interface is observed.
ISSN:0169-5983
1873-7005
1873-7005
DOI:10.1016/j.fluiddyn.2004.04.004