The results of a research program begun in 1996 by the IRSST and Concordia University demonstrated that the use of high stacks did not guarantee an appropriate dilution of the emissions from buildings. The presence of adjacent buildings influences the dispersion of emissions, which can contaminate the fresh air intakes.

This project will study the dispersion of contaminated air from stacks, which could be reintroduced indoors, due to the neighbouring buildings. First, the researchers will analyze the dispersion effects using numerical simulations (Computational Fluid Dynamics – CFD) and experimental tests in a wind tunnel. Following this work, the researchers will develop a new model for predicting the dispersions of the emissions from the stacks. This model will help engineers in building mechanics to design new buildings in order to avoid or reduce the risks of contamination of fresh air intakes in an urban environment.