Experimental Quantification and Modelling of Dispersion of Particles in Urban Street Canyons
Ultrafine particles associated with vehicle use can be particularly harmful to health because of their ability to penetrate the cell walls of the lung. While a reasonable amount of data are available on vehicle emissions there is little information on particle emissions from tyre wear and brake linings and the re-suspension of dust from roads by traffic. This project will:
Birmingham, West Midlands
Wind Tunnel Experiments to measure particle emissions from roads by direct wind action
Measurements will be made in the University of Birmingham large wind tunnel, currently at Porton Down. Real road dust samples will be deposited on typical road surfaces within the tunnel and particle emissions measured for a range of wind-induced shear stresses.
Wind tunnel experiments to measure dispersion of particles from vehicles
The Motor Industries Research Association facilities are being used to measure particle dispersion from vehicle exhaust pipes and the road/wheel interface to the end of the near wake. The studies are being carried out by a MIRA-supported student at the University of Nottingham. Experimental studies are being carried out to measure exhaust gas concentrations at various positions in the wake. Computational Fluid Dynamic studies of the problem are also underway.
Development of a street canyon local scale large eddy simulation model
The Colorado State University RAMS model will be used to predict velocity fields within urban street canyons, and also to derive concentrations and size distributions of particles within the street canyon together with the particulate flux from the top of the canyon. Air quality data collected in the West Midlands July1999 and January 2000, will be used for model verification.
April 2000 Three years
University of Birmingham
The information obtained will help planners and decision makers in the future design of urban areas and control of traffic.
Environmental scientists, managers and health workers in urban applications
Further information is available from the following contacts:
Lead Researcher: Professor C Baker
Tel: 0121 414 5049, Fax: 0121 414 3675, e-mail: firstname.lastname@example.org
URGENT Programme Manager: Graham Leeks
Tel: 01491 692203, Fax: 01491 692313, e-mail: email@example.com