Abstract
A 3-D Eulerian-Lagrangian approach to moving vehicles is presented that takes into account the traffic induced flow rate and turbulence. The method is applied to pollutants dispersion in a street canyon. The approach is based on CFD calculations using Eulerian approach to the continuous phase and Lagrangian approach to the "discrete phase" of moving objects - vehicles. A commercial CFD code StarCD was used into which the Lagrangian model was integrated. As an example a street canyon is taken into consideration. It has the length of 50 m and the aspect ratio of 1.27. The speed of wind was assigned values of 4, 7 and 12 m/s at the altitude of 300 m. The total height of the domain is 115 m. In the study different traffic situations are considered, namely one-way and two-way traffic with different traffic rates per lane. The predictions show that different traffic situations affect pollutants dispersion in the street canyon and that there are also differences in the pollutants dispersion in case of one- and two-way traffic.
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References
Crowe, G.T., Sharma, M.P., Stock, D.E., (1977), The Particle-Source-In-Cell Model for Gas-Droplet Flows, J. Fluid Eng., 99, (325–332)
Eskridge R. E., Hunt J. C. R., (1979), Highway modelling. Part I: Prediction of velocity and turbulence fields in the wake of vehicles, J. Applied Meteorology 18:387
Hider, Z.; Hibberd, S.; Baker, C.J.,(1997), Modelling particulate dispersion in the wake of a road vehicle, J. Wind Eng. Ind. Aerodyn., Vol 67/68, p733–744.
Jícha M., Katolicky J., (1999) Eulerian-Lagrangian computational model for traffic induced flow field and turbulence inside a vehicle tunnel, Int. Journal for Wind Engineering and Industrial Aerodynamics (sent for publication)
Kastner-Klein P., (1999) privite communication
Kastner-Klein P., Sini, J. F., Fedorovich, E., Mestayer, P. G., (1999), Similarity concept for dispersion of car exhaust gases in street canyon tested against widn-tunnel and numerical model data, 2nd Int. Conf. Urban Air Quality, paper RAP3.3, Madrid, Spain
Sedefian L., Rao S. T., Czapski U., (1981), Effects of traffic-generated turbulence on near-field dispersion, Atmospheric Environment 15:527
Shih, T. H., Zhu, J., Lumley, J. L. (1993), A realizable Reynolds stress algebraic equation model, NASA TM-105993
Sini J. F., Mestayer P. G., (1997), Traffic-induced urban pollution: A numerical simulation of street dispersion and net production, 22 nd NATO/CCMS International Technical Meeting on Air Pollution Modelling and its Application, Clermont-Ferrand, France
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Jicha, M., Pospisil, J. & Katolicky, J. Dispersion of Pollutants in Street Canyon under Traffic Induced Flow and Turbulence. Environ Monit Assess 65, 343–351 (2000). https://doi.org/10.1023/A:1006452422885
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DOI: https://doi.org/10.1023/A:1006452422885