Full scale experiment of gas dispersion in an urban area and its prediction by wind tunnel experiment and large eddy simulation

Part 3 Validation of similarity law in wind tunnel experiment for gas dispersion

Abstract

This study aims to verify prediction of pollutant concentration in urban area based on wind tunnel experiment. For this purpose, wind tunnel experiments and filed measurements of gas dispersion were conducted in the campus of Tokyo Polytechnic University, and their results were compared. In addition, wind tunnel experiment was carried out under various conditions of wind velocity and pollutant emission rates to confirm similarity law. The normalized non-dimensional concentration obtained by the wind tunnel experiments agreed well with the field measurement data. It was also confirmed that the normalized non-dimensional concentration was nearly independent of wind velocity and pollutant emission rate.