EFFECT OF AMBIENT STRATIFICATION ON BUOYANT JETS IN CROSS-FLOW

A numerical technique for integrating the fully elliptic Reynolds-aver aged Navier-Stokes and diffusion equations has been used to investigat e the effect of ambient density stratification on the flow characteris tics of a vertical force plume in a cross-flow of a stably linear stra tified environment. A two-equation k-epsilon turbulence model is emplo yed to simulate the turbulent transport quantities and to close the so lving problem. Some basic flow features and a structure for the intera ction of the buoyant jets with a density-stratified cross-flow are obt ained. The results show that the ambient stratification tends to inhib it the flow development of the buoyant source and to encourage the for mation of secondary and third vortex pairs in the jet cross section as a plume flowing downstream. It then results in causing the jet-flow o scillation from its maximum height-of-rise.