Preliminary Study on the Wind Flow and Pollutant Dispersion in an Idealized Street Canyon

A. W. Muhammad Yazid; C. S. Nor Azwadi; S. Mohamed Salim; S. Mansor

Authors

A. W. Muhammad Yazid Department of Thermo-Fluids, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia
C. S. Nor Azwadi Department of Thermo-Fluids, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia
S. Mohamed Salim School of Engineering and Physical Sciences, Heriot-Watt University Malaysia, 62100 Putrajaya, Malaysia
S. Mansor Department of Aeronautics, Automotive & Ocean Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia

Keywords:

Street canyon, Thermal atmospheric conditions, Tree plantings, Turbulence models

Abstract

This article describes the approach towards a sensitivity study of wind flow and pollutant dispersion in an idealized street canyon with tree plantings under thermal atmospheric conditions using computational fluid dynamics (CFD). First, validation studies were performed to determine the best turbulence model for the simulation of wind flow under thermal atmospheric conditions against the previous experimental wind tunnel data. The results of the numerical simulation indicate that large eddy simulation (LES) can accurately predict the wind flow structure at different thermal intensities and different locations of heated wall. Finally, detailed descriptions of future research are presented at the end of this article.