The impact of adjacent buildings on the dispersion of emissions from buildings: A numerical (CFD) and experimental approach in a wind tunnel

Abstract

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.

Produced Under this Project

Scientific Reports

A Wind Tunnel Study of the Effect of Adjacent Buildings on Near-Field Pollutant Dispersion from Rooftop Emissions Research Report: R-851, R-848
The Effect of Upstream and Downstream Buildings on Dispersion of Effluents: A Computational Fluid Dynamics (CFD) Approach Research Report: R-852, R-849

Video Reports and Conferences

The impact of adjacent buildings on the dispersion of emissions from buildings: A numerical (CFD) and experimental approach in a wind tunnel Conference: CF-207

Scientific Publications

Near-field pollutant dispersion in the built environment by CFD and wind tunnel simulations
Chavez M., Hajra B., Stathopoulos T., Ali Bahloul
Source :
in Proceedings of the Fifth International Symposium on computational Wind Engineering / CWE2010, (5th : May 23-27, 2010 : Chapel Hill, USA), 2010
Near-field pollutant dispersion in the built environment by CFD and wind tunnel simulations
Chavez M., Hajra B., Stathopoulos T., Ali Bahloul
Source :
Journal of Wind Engineering and Industrial Aerodynamics, vol. 99, no 4, 2011, p. 330-339
Near field pollutant dispersion around buildings in the urban environment
Ali Bahloul, Chavez M., Hajra B., Stathopoulos T.
Source :
in Indoor Air : 12th International Conference on Indoor Air Quality and Climate, (12th : June 5-10, 2011 : Austin, USA), 2011
The effect of upstream buildings on near-field pollutant dispersion in the built environment
Hajra B., Stathopoulos T., Ali Bahloul
Source :
Atmospheric Environment, vol. 45. no 28, 2011, p. 4930-4940
Assessment of near-field pollutant dispersion: effect of upstream buildings
Chavez M., Hajra B., Stathopoulos T., Ali Bahloul
Source :
in International Conference on Wind Engineering, (13th : July 10-15, 2011 : Amsterdam, The Netherlands), 2011
Modelling of near-field pollutant dispersion in the built environment: methods and challenges
Hajra B., Chavez M., Stathopoulos T., Ali Bahloul
Source :
in International Workshop on Physical Modeling of Flow Dispersion Phenomena / PHYSMOD2011, (August 22-24, 2011 : Hamburg, Germany), 2011
Assessment of near-field pollutant dispersion: effect of upstream buildings
Chavez M., Hajra B., Stathopoulos T., Ali Bahloul
Source :
Journal of Wind Engineering and Industrial Aerodynamics, vol. 104-106, 2012, p. 509-515
CFD modelling of flow and dispersion in the built environment: different RANS models and a first attempt to use URANS
Chavez M., Stathopoulos T., Ali Bahloul
Source :
in Seventh International Colloquium on Bluff Body Aerodynamics and Applications / BBAA, (7th : September 2-6, 2012 : Shanghai, China), 2012
A comprehensive experimental study of the effects of adjacent buildings on near-field pollutant dispersion
Hajra B.
Source :
Thèse de doctorat, Montréal, Université Concordia, 2012
Performance of ASHRAE models in assessing pollutant dispersion from rooftop emissions
Hajra B., Stathopoulos T., Ali Bahloul
Source :
HVAC&R Research, vol. 20, no 1, 2014, p. 72-79
CFD simulations for placement of air intakes on buildings and pollutant re-ingestion in the urban environment
Chavez Yanez M., Stathopoulos T., Ali Bahloul
Source :
Proceeding of 14th International Conference on Wind Engineering, Porto Allegre, Brazil.
L’effet des édifices adjacents sur la dispersion des émissions des bâtiments : une approche numérique (CFD) et expérimentale en soufflerie
Ali Bahloul, Chavez Yanez M.
Source :
Communication présentée au Rendez-vous de la science de l'IRSST, Montréal, QC.

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Additional Information

Type: Project

Number: 0099-7590

Status: Completed

Year of completion: 2014

Research Field: Chemical and Biological Hazard Prevention

Team:

Ali Bahloul (IRSST)
Ted Stathopoulos (Université Concordia)