Hydrodynamic Behavior of Cohesive Sediments in Turbulent Flow

by Shuyou Cao, Chengdu Univ of Science and, Technology, Chengdu, China,
Duo Fang, Chengdu Univ of Science and, Technology, Chengdu, China,

Document Type: Proceeding Paper

Part of: Coastal Zone '91


To meet both engineering and basic research requirements, a series of experiments on the deposition of cohesive soil were conducted in an annular rotating fiberglass channel-ring system similar to that developed at M.I.T.(Partheniades and Mehta, 1971). The turbulent flow behavior in the special apparatus was compared with open-channel flow. The research confirmed the conclusions that the deposition behavior of cohesive sediments is controlled strongly by the bed shear stress, the initial concentration of turbid water, and the salinity of the flow. According to the results of the experiments, the nondimensional deposition concentration can be described as a gamma distribution of a nondimensional deposition time; thus an equation relating the deposition rate to the nondimensional deposition time was derived.

Subject Headings: Turbulent flow | Hydrodynamics | Sediment | Open channel flow | Salt water | Sediment transport | Fluid flow | Shear stress

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