Water tank studies of plume rise and diffusion in a stably stratified layer under calm conditions

Summary Water tank experiments were conducted to investigate plume rise and diffusion of gases discharged from stacks under calm conditions with field wind velocity less than 0.4 m/s with stable thermal stratification. Similarity rules of scaled model experiments were obtained from nondimensional analysis of the fundamental equation. The densimetric Froude number of a plume and the buoyancy ratio of the plume and the atmosphere were varied during the water tank experiments while plume rise height, plume thickness, etc. were measured. It was found that the experimental results could be expressed in terms of these two dimensionless parameters. Papper presented at the GNFAO/EURASAP Meeting, Turin, September 1989. To speed up publication, proofs were not sent to the authors and were supervised by the Scientific Committee.