{"title":"Three Dimensional Analysis of Pollution Dispersion in Street Canyon","authors":"T. Banerjee, R. A. Christian","volume":57,"journal":"International Journal of Civil and Environmental Engineering","pagesStart":383,"pagesEnd":390,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/8626","abstract":"<p>Three dimensional simulations are carried out to estimate the effect of wind direction, wind speed and geometry on the flow and dispersion of vehicular pollutant in a street canyon. The pollutant sources are motor vehicles passing between the two buildings. Suitable emission factors for petrol and diesel vehicles at varying vehicle speed are used for the estimation of the rate of emission from the streets. The dispersion of automobile pollutant released from the street is simulated by introducing vehicular emission source term as a fixed-flux boundary condition at the ground level over the road. The emission source term is suitably calculated by adopting emission factors from literature for varying conditions of street traffic. It is observed that increase in wind angle disturbs the symmetric pattern of pollution distribution along the street length. The concentration increases in the far end of the street as compared to the near end.<\/p>\r\n","references":"[1] J F Sini, A. Anquetin and P. G. Miestayer, Pollutant dispersion and\r\nthermal effects in urban street canyons, Atmospheric Environment,\r\nVol.30, No. 15, pp. 2659-2677, 1996.\r\n[2] X. X. Li., C. H. Liu, D. Y. C. Leung, K. M. Lam, Recent progress in\r\nCFD modelling of wind field and pollutant transport in street canyons,\r\nAtmospheric Environment, Vol. 40, pp. 5640-5658, 2006.\r\n[3] M. Y. Tsai and K. S. Chen, Measurements and three-dimensional\r\nmodeling of air pollutant dispersion in an urban street canyon, Vol. 38,\r\npp. 5911-5924, 2004.\r\n[4] G. Vachon., P. Louka, J. M. Rosant, P. G. Mestayer. And J. F. Sini,\r\nMeasurements of traffic-induced turbulence within a street canyon\r\nduring Nantes-99 Experiment, 3rd Urban Air Quality Conference\r\nLoutraki, 2000.\r\n[5] K.Muralidhar and G. Biswas,), Advanced Engineering Fluid Mechanics,\r\nNarosa Publication, New Delhi, 1996.\r\n[6] J. M. Crowther, A. Galeil and A. A.Hassan, Three-dimensional\r\nnumerical simulation of air pollutant dispersion in strret canyon, Water,\r\nAir and Soil Pollution Focus2, pp. 279-295, 2002 .\r\n[7] M. Idczk, P. Mesteyer, J M Rosant, J F. Sini, M. Violleau M.,\r\nMicrometeorological measurements in a street canyon during the joint\r\nATREUS-PICADA experiment, Boundary Layer Meteorol, Vol. 124,\r\npp. 25-41, 2007.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 57, 2011"}