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RETRACTED ARTICLE: Numerical simulation on pollutant dispersion from vehicle exhaust in street configurations

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This article was retracted on 06 December 2016

Abstract

The impact of the street configurations on pollutants dispersion from vehicles exhausts within urban canyons was numerically investigated using a computational fluid dynamics (CFD) model. Three-dimensional flow and dispersion of gaseous pollutants were modeled using standard κ − ε turbulence model, which was numerically solved based on Reynolds-averaged Navier–Stokes equations by the commercial CFD code FLUENT. The concentration fields in the urban canyons were examined in three cases of street configurations: (1) a regular-shaped intersection, (2) a T-shaped intersection and (3) a Skew-shaped crossing intersection. Vehicle emissions were simulated as double line sources along the street. The numerical model was validated against wind tunnel results in order to optimize the turbulence model. Numerical predictions agreed reasonably well with wind tunnel results. The results obtained indicate that the mean horizontal velocity was very small in the center near the lower region of street canyon. The lowest turbulent kinetic energy was found at the separation and reattachment points associated with the corner of the down part of the upwind and downwind buildings in the street canyon. The pollutant concentration at the upwind side in the regular-shaped street intersection was higher than that in the T-shaped and Skew-shaped street intersections. Moreover, the results reveal that the street intersections are important factors to predict the flow patterns and pollutant dispersion in street canyon.

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Correspondence to Mohamed F. Yassin.

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This article has been retracted at the request of the Editor-in-Chief. A complaint received against it indicated that significant sections of the text showed a similarity with the authors own papers published previously. The two papers are:

1. Impact of street intersections on air quality in an urban environment, Mohamed F. Yassin, R. Kellnerovác, and Z. Jaňour, Volume 42, Issue 20, June 2008, Pages 4948-4963. Atmospheric Environment

2. Impact of height and shape of building roof on air quality in urban street canyons, Mohamed F. Yassin, Volume 45, Issue 29, September 2011, Pages 5220-5229, Atmospheric Environment

In addition, Mr. Mohamed F. Yassin published this paper in Environmental Monitoring and Assessment without the consent of co-authors Zbynek Janour and Radka Kellnerova. Given the copyright and authorship issues involved, the Environmental Monitoring and Assessment article in question is being retracted.

An erratum to this article is available at http://dx.doi.org/10.1007/s10661-016-5698-0.

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Yassin, M.F., Kellnerová, R. & Jaňour, Z. RETRACTED ARTICLE: Numerical simulation on pollutant dispersion from vehicle exhaust in street configurations. Environ Monit Assess 156, 257–273 (2009). https://doi.org/10.1007/s10661-008-0482-4

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  • DOI: https://doi.org/10.1007/s10661-008-0482-4

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