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Abstract ▼ AI-Helper

The pollutant diffusion in an urban environment is predicted with field study and wind tunnel experiment under different conditions of thermal stability for various wind directions using tracer gas method from a source point Field experiments was conducted in a dense urban environment in the center...

The pollutant diffusion in an urban environment is predicted with field study and wind tunnel experiment under different conditions of thermal stability for various wind directions using tracer gas method from a source point Field experiments was conducted in a dense urban environment in the center of Tokyo using SF6 (sulfur hexafluonde) as the tracer gas Concentration data of tracer gas were collected from seventeen sites, including vehicle parking areas, street canyons, open areas, and high-rise buildings Diffusion distribution were examined also in a boundary layer wind tunnel using a budding-block model at a scale of 1600 Concentrations of ethylene (C₂H₄) gas at eighty-three points were measured in the wind tunnel experiments The diffusion field measured in the wind tunnel experiments is compared with the field test data In order to evaluate the prediction accuracy of the wind tunnel experiments The results of the wind tunnel experiments show a good agreement with the results of the field results.