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

Abstract:

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.

• Periodical: Applied Mechanics and Materials (Volume 695)
• Pages: 562-566
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.695.562
• Online since: November 2014
• Authors: Afiq Witri Muhammad Yazid*, Nor Azwadi Che Sidik, Salim Mohamed Salim, Shuhaimi Mansor
• Keywords: LES, Model Sensitivity, Pollutant Dispersion, Street Canyon, Wind Flow Structures

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