Author(s)

T.J. Taylor & A.G. Robins

Abstract

Ground level concentrations are used to investigate the influence of emission velocity and source configuration on the entrainment rate of two-dimensional dense gas releases (line source) in neutral atmospheric boundary layer flow. The influence of plume laminarisation and the significance of molecular diffusion were also investigated. For 0 was not influenced by increased emission velocity for WJu* < 3. For LL = 0.5ms ' complete laminarisation of the plume is observed for /?/* > 30, with significant reductions in turbulent mixing observed at Ri* ~ 20. With the equipment used, limitations on the gas release rate restrict the ability to produce high /?/* plumes for LL > lms"\ and obtain fully turbulent results for /?/* > 20. Introduction Experimental st

Keywords