title: An overview of experimental results and dispersion modelling of nanoparticles in the wake of moving vehicles.
abstract: 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.
authors.affiliation: Division of Civil, Chemical and Environmental Engineering, Faculty of Engineering and Physical Sciences (FEPS), University of Surrey, Guildford GU2 7XH, UK.
authors.forename: Matteo
authors.initials: M
authors.lastname: Carpentieri
authors.forename: Prashant
authors.initials: P
authors.lastname: Kumar
authors.forename: Alan
authors.initials: A
authors.lastname: Robins
mesh_terms: D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D002947:Cities; D004784:Environmental Monitoring; D008962:Models, Theoretical; D053758:Nanoparticles / Q000032:analysis* / Q000737:chemistry; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis* / Q000737:chemistry; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter; D001335:Vehicle Emissions