Abstract
A numerical technique for integrating the fully elliptic Reynolds-averaged Navier-Stokes and diffusion equations has been used to investigate the effect of ambient density stratification on the flow characteristics of a vertical force plume in a cross-flow of a stably linear stratified environment. A two-equation \ik-ϵ turbulence model is employed to simulate the turbulent transport quantities and to close the solving problem. Some basic flow features and a structure for the interaction of the buoyant jets with a density-stratified cross-flow are obtained. The results show that the ambient stratification tends to inhibit the flow development of the buoyant source and to encourage the formation of secondary and third vortex pairs in the jet cross section as a plume flowing downstream. It then results in causing the jet-flow oscillation from its maximum height-of-rise.
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