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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Veröffentlicht in:	Fluid dynamics research 2004-08, Vol.35 (2), p.87-106
Hauptverfasser:	Michallet, H, Mory, M
Format:	Artikel
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	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