Ractive pollutants dispersion modeling in a street canyon

• Autorzy: Merah A. , Noureddine A.

Identyfikatory

DOI

10.2478/ijame-2019-0006

• Języki publikacji: EN

Abstrakty

EN

Reactive pollutant dispersion in a 3-D urban street canyon is numerically investigated using a computational fluid dynamics (CFD) code (Ansys-CFX), with the k–ε turbulence model and includes transport equations for NO, NO2, and O3 with simple photochemistry. An area emission source of NO and NO2 was considered in the presence of background O3 with an ambient wind perpendicular to the along-canyon direction. The results showed that the magnitude of NOx (NO+NO2) concentrations on the leeward side of the upstream buildings was much larger than the windward side of the downstream building, due to the entrainment and dispersion of traffic emissions by the primary vortex. The reverse is the case for ozone with higher concentrations on the windward side compared to the leeward side. The model has been validated against no-reactive pollutant experimental data of the wind tunnel experiments of Hoydysh and Dabberdt [1].

Słowa kluczowe

EN

street canyon; reactive pollutant; computational fluid dynamics CFD; NOx; O3

PL

zanieczyszczenia reaktywne; obliczeniowa dynamika płynów; ulica

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2019
• Tom: Vol. 24, no. 1
• Strony: 91--103
• Opis fizyczny: Bibliogr. 18 poz., rys., wykr.

Twórcy

autor

Merah A.

• Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques BP 384, Siège ex-Pasna Zone Industrielle Bou-Ismail CP 42004, Tipaza, ALGERIE
• Laboratoire de Mécanique Appliquée LMA Université des Sciences et de la Technologie d’Oran Mohamed BOUDIAF (USTO-MB) ALGERIE

autor

Noureddine A.

• Laboratoire de Mécanique Appliquée LMA Université des Sciences et de la Technologie d’Oran Mohamed BOUDIAF (USTO-MB) ALGERIE

Bibliografia

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• [3] Kastner-Klein P. and Plate P.J. (1999): Wind-tunnel study of concentration fields in street canyons. – Atmospheric Environment, vol.33, No.24-25, pp.3937-3979.
• [4] Meroney R.N. and Pavageau M. (1996): Study of line source characteristics for 2-D physical modelling of pollutant dispersion in street canyons. – Journal of Wind Engineering and Industrial Aerodynamics, vol.62, No.1, pp.37-56.
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• [14] Yoshihide T., Akashi M., Ryuichiro Y., Hiroto K., Tsuyoshi N., Masaru Y. and Taichi Shirasawa S. (2008): AIJ guidelines for practical Applications of CFD to pedestrian wind environment around buildings. – Journal of Wind Engineering and Industrial Aerodynamics, vol.96, No.10-11, pp.1749-1761.
• [15] Baik J.J., Kang Y.S. and Kim J.J. (2007): Modelling reactive pollutant dispersion in an urban street canyon. – Atmospheric Environment, vol.41, No.5, pp.934-949.
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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019)