Abstract
The discharge of sewage effluent from ports in a long diffuser pipe on the ocean bottom produces a flow pattern that may be idealized as a buoyant jet from a line source. To minimize the impact of emission of pollutants, the dispersion of wastewater should be predictable, and the prediction of the maximum height of rise is important in determining whether or not the jet will remain submerged. A buoyancy-extended K-ε model of turbulence has been developed for calculating the dynamical and thermal fields in forced plane plumes vertically discharged into a stably stratified environment. The predicted maximum height of rise for the linearly stratified quiescent ambient case is compared with available experimental data. An idealized two-layer situation is then considered in such a way as to simulate a thermocline in the upper part of the ocean. Numerical results are presented for a uniform horizontal cross-stream situation.
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