期刊
ENVIRONMENTAL POLLUTION
卷 159, 期 3, 页码 685-693出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2010.11.041
关键词
Dispersion model; Nanoparticles number concentration; Particle size distribution; Street canyons; Near and far wake; Vehicle exhaust emission
资金
- EPSRC [EP/H026290/1]
- EPSRC [EP/H026290/1] Funding Source: UKRI
- NERC [ncas10006] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [GR/R78084/01, EP/H026290/1] Funding Source: researchfish
- Natural Environment Research Council [ncas10006] Funding Source: researchfish
Understanding the transformation of nanoparticles emitted from vehicles is essential for developing appropriate methods for treating fine scale particle dynamics in dispersion models. This article provides an overview of significant research work relevant to modelling the dispersion of pollutants, especially nanoparticles, in the wake of vehicles. Literature on vehicle wakes and nanoparticle dispersion is reviewed, taking into account field measurements, wind tunnel experiments and mathematical approaches. Field measurements and modelling studies highlighted the very short time scales associated with nanoparticle transformations in the first stages after the emission. These transformations strongly interact with the flow and turbulence fields immediately behind the vehicle, hence the need of characterising in detail the mixing processes in the vehicle wake. Very few studies have analysed this interaction and more research is needed to build a basis for model development. A possible approach is proposed and areas of further investigation identified. (C) 2010 Elsevier Ltd. All rights reserved.
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