Numerical simulation of turbulent dispersion on a two-way facing traffic road

Ryusuke Yasuda*, Takeyuki Miyajima, Atsumasa Yoshida

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A Large Eddy Simulation (LES) model was developed to investigate vehicle-induced turbulence and its effect on turbulent dispersion. The instantaneous behaviour of vehicle exhausts and the time-space averaged distributions of flow and concentration statistics on the roadway were estimated. The patterns of mean flow are significantly different between the one-way and the two-way traffic cases. In the vehicle passing area, the standard deviations of the spanwise and the vertical fluctuation velocities are two times larger than the maximum of the mean velocity. The relationship between the growth rate of vertical plume width and the background cross flow was also investigated.

Original languageEnglish
Pages (from-to)164-172
Number of pages9
JournalInternational Journal of Environment and Pollution
Issue number1-4
Publication statusPublished - 2011 Feb
Externally publishedYes


  • Air pollution
  • Large eddy simulation
  • LES
  • Roadside environment
  • Sliding mesh method
  • Vehicle induced turbulence
  • Vertical plume width

ASJC Scopus subject areas

  • Waste Management and Disposal
  • Pollution
  • Management, Monitoring, Policy and Law


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