Mixing of Buoyant Surface Jet over Sloping Bottom

by Bijan Safaie, (A.M.ASCE), Asst. Prof of Civ. Engrg.; State Univ. of New York, Buffalo, NY,

Serial Information: Journal of the Waterway, Port, Coastal and Ocean Division, 1979, Vol. 105, Issue 4, Pg. 357-373

Document Type: Journal Paper


The mean characteristics of a buoyant surface jet discharged horizontally over sloping bottom was investigated through a set of systematic experiments. It was found that the mean characteristics of the buoyant surface jet do not vary monotonically with the source densimetric Froude number due to the formation of large scale eddies, and buoyant spread. An empirical relationship between normalized separation depth and source densimetric Froude number is presented and a possible mechanism explaining the dynamics off the detachment point is suggested. A simple integral model is developed for the momentum-dominated region. The results of this model are used in conjunction with experimental results to show that the shape of similarity profile in the momentum-dominated region is a function of the bottom slope and discharge aspect ratio.

Subject Headings: Jets (fluid) | Slopes | Froude number | Water discharge | Eddy (fluid dynamics) | Buoyancy | Empirical equations | Integrals

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