Environmental Fluid Mechanics | VOL. 17
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2D brine sewage after impinging on a shallow sea free surface

Publication Date Jan 16, 2017

Abstract

We consider the problem of the vertically upwards disposal of heavy brine sewage from a two-dimensional diffuser in a lighter, homogeneous, motionless and shallow ambient sea. The rejected high salinity water of seawater desalination plants for urban and agricultural uses is such a case of a two dimensional fountain. The disposal of brine sewage produces a negative buoyant jet due to its initial momentum, which impinges on the free surface, spreads laterally on it and then sinks downwards, because of the negative buoyancy. Laboratory experiments and dimensional considerations are used in this paper in order to investigate the spreading behavior (width) of the vertical fountain which impinges on the free surface of the shallow ambient fluid. The experimental results have been used to derive an equation relating the width at the free surface with the initial parameters of the flow. In addition, the experimentally measured dilution of the heavier brine sewage on the recipient’s surface is compared with the dilution which was calculated by a numerical simulation of a well-known commercial software package, CORJET (a CORMIX sub model).

Concepts
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Free Surface
Two-dimensional Diffuser
Disposal Of Sewage
Initial Momentum
Shallow Sea
Free Surface Of Fluid
Negative Jet
Homogeneous Sea
Laboratory Experiments
Shallow Fluid

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