The use of wind tunnels for the study of flue-gas dispersion, the scaling criteria appropriate to the modelling of the motion of buoyant plumes in turbulent boundary layers, and an experimental technique for measuring mean concentration levels are presented and discussed. Two examples of wind-tunnel experiments are used to demonstrate the techniques and to illustrate the implications of the scaling criteria. Both experiments were performed at ***1 300 scale in a simulated neutrally stable atmospheric boundary layer. Finally, the present limitations of wind-tunnel studies are considered and possible future developments are discussed.
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