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Physical modelling of entrainment by a Concentrated Benthic Suspension
Bruens, A.W.; Kranenburg, C.; Winterwerp, J.C. (2002). Physical modelling of entrainment by a Concentrated Benthic Suspension, in: Winterwerp, J.C. et al. (Ed.) (2002). Fine sediment dynamics in the marine environment. Proceedings in Marine Science, 5: pp. 109-124
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., more
In: Proceedings in Marine Science. Elsevier: Amsterdam. ISSN 1568-2692, more
Peer reviewed article

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Keyword
    Marine
Author keywords
    cohesive sediments; concentrated benthic suspension; entrainment; turbulence; density stratification; siltation

Authors  Top 
  • Bruens, A.W.
  • Kranenburg, C.
  • Winterwerp, J.C., more

Abstract
    The process of entrainment of an upper clear water layer by a highly turbulent lower Concentrated Benthic Suspension (CBS) is studied in this paper. A rotating annular flume was adapted to carry out experiments on this type of entrainment. Velocities have been measured at two heights. The results indicate that the lower layer is more turbulent than the upper layer. As a result of entrainment, the density of the lower layer decreases and the height of the interface increases with time. The results of the experiments show that a freshly deposited mud layer behaves in a similar manner as a viscous fluid. The results also indicate that the non-dimensional entrainment rate is proportional to the inverse of an overall Richardson number.

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