This report is a part of a systematic study on gaseous dispersion about an isolated building structure. In order to estimate the maximum ground concentration distribution, the conventional formula are compared with the wind tunnel results. Different stack heights are monitored both by smoke visualization and quantitative concentration measurements. The related parameters such as building orientation, stack height, and exit momentum are discussed. The experiment was conducted in a thick, neutral boundary layer, end a radioactive gas, Kr-85, was used as a tracer for concentration measurements.
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