Large-eddy simulation of flow and pollutant dispersion in a 3D urban street model located in an unstable boundary layer

2018 ◽  
Vol 142 ◽  
pp. 47-57 ◽  
Author(s):  
Guoyi Jiang ◽  
Ryuichiro Yoshie
Keyword(s):  
Boundary Layer ◽  
Large Eddy Simulation ◽  
Pollutant Dispersion ◽  
Urban Street ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Unstable Boundary Layer

Model Sensitivity Test of Large Eddy Simulation for Wind Flow and Pollutant Dispersion in a Street Canyon

2014 ◽  
Vol 695 ◽  
pp. 562-566
Author(s):  
Afiq Witri Muhammad Yazid ◽  
Nor Azwadi Che Sidik ◽  
Salim Mohamed Salim ◽  
Shuhaimi Mansor
Keyword(s):  
Steady State ◽  
Large Eddy Simulation ◽  
Street Canyon ◽  
Pollutant Dispersion ◽  
Wind Flow ◽  
Model Sensitivity ◽  
Ansys Fluent ◽  
Urban Street ◽  
Eddy Simulation ◽  
Large Eddy

This paper reports on the model sensitivity analysis of a commercial computational fluid dynamics program, ANSYS FLUENT v14. The purpose of the analysis was to determine the appropriate modeling settings for numerical model of the case study. A full scale of a simplified urban street canyon was modelled and the turbulent flow was calculated using Large Eddy Simulation (LES) techniques. The model sensitivity tests involved are mesh sensitivity, statistically steady state and sampling. Adequate numbers of cells, period time to achieve statistically steady state (SST) and sampling time to simulate wind flow and pollutant dispersion in street canyon were determined through systematic tests.

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