DISPERSION MODELING IN CONVECTIVE WIND FLOWS

The scaling relationships required to model the dispersion of a buoyan t plume in a convective flow have been developed, in particular a modi fied Froude number has been used which maintains a correctly scaled pa th for the plume and kinematic similarity between the vertical convect ive and longitudinal free-stream velocities. Scale models of atmospher ic convective boundary layers have been developed in the new Monash Un iversity Environmental Wind Tunnel and examples of the characteristics of the largest scale, 1/100, are presented, in particular observing t he spectral distributions of the longitudinal and vertical velocity co mponents with increasing convection.