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CBS layers in a diffusive turbulence grid oscillation experiment
Mory, M.; Gratiot, N.; Manning, A.J.; Michallet, H. (2002). CBS layers in a diffusive turbulence grid oscillation experiment, in: Winterwerp, J.C. et al. (Ed.) Fine sediment dynamics in the marine environment. Proceedings in Marine Science, 5: pp. 139-154
In: Winterwerp, J.C.; Kranenburg, C. (Ed.) (2002). Fine sediment dynamics in the marine environment. Proceedings in Marine Science, 5. Elsevier: Amsterdam. ISBN 0-444-51136-9. XV, 713 pp., meer
In: Proceedings in Marine Science. Elsevier: New York. ISSN 1568-2692; e-ISSN 2352-2860, meer
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoord
    Marien/Kust
Author keywords
    Fluid mud; turbulence; floculation; cohesive sediment suspensions
Auteurs  Top 
  • Mory, M.
  • Gratiot, N.
  • Manning, A.J.
  • Michallet, H.
Abstract
    The generation of a Concentrated Benthic Suspension (CBS) of a fluid mud mixture is investigated in the laboratory in a grid stirred experiment. A sediment concentration in the CBS layer in the range 3 g/l to 200 g/l was considered. The sediment concentration, the turbulence properties, and the settling velocity have been measured. The decay of turbulence with increasing distance from the grid is not found to vary with the concentration inside the CBS layer except in the vicinity of the lutocline. The settling velocity decreases rapidely with increasing sediment concentration and appears to be the most sensitive parameter in the experiment. A clear difference in the value of the flux Richardson number at the lutocline is observed depending on the sediment concentration. Rif is about 0.1 for the highest concentrations and increases above 0.5 for the low concentration cases.
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