The Simulation of Mixing Layers Driven by Compound Buoyancy and Shear

Fully developed compound shear and buoyancy driven mixing layers are predicted using a k-e turbulence model. Such mixing layers present an exchange of equilibrium in mixing flows. The k-e buoyancy constant C e3 = 0.91, defined in this study for buoyancy unstable mixing layers, is based on an approximate self-similar analysis and an accurate numerical solution. One-dimensional transient and two-dimensional steady calculations are presented for buoyancy driven mixing in a uniform flow field. Two-dimensional steady calculations are presented for compound shear and buoyancy driven mixing.