Numerical prediction of air flow within street canyons based on different two-equation k-ε models

Afiq Witri Muhammad Yazid, Nor Azwadi Che Sidik (Lead / Corresponding author), Salim Mohamed Salim, Nur Hamizah Mohamad Yusoff

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Citations (Scopus)
    161 Downloads (Pure)

    Abstract

    Numerical simulations on airflow within street canyons were performed to investigate the effect of the street aspect ratio and wind speed on velocity profiles inside a street canyon. Three-dimensional Standard, Renormalization Group (RNG) and Realizable k-ε turbulence model are employed using the commercial CFD code FLUENT to solve the Reynolds-averaged Navier-Stokes (RANS) equations. A comparison of the results from the presently adopted models with those previously published demonstrated that the k-e model is most reliable when simulating wind flow. The model is then employed to predict the flow structures in a street canyon for a range of aspect ratios (building height to street width ratio) between 0.5-2 at Reynolds number of 9000, 19200 and 30700 corresponding to the ambient wind speeds of 0.68m/s, 1.46m/s and 2.32m/s respectively. It is observed that the flow structure in the street canyon is influenced by the buildings aspect ratios and prevailing wind speeds. As the street aspect ratio increases, the air ventilation within the canyon reduces.

    Original languageEnglish
    Title of host publicationIOP Conference Series: Materials Science and Engineering
    Volume50
    Edition1
    DOIs
    Publication statusPublished - 2013
    Event2nd International Conference on Mechanical Engineering Research, ICMER 2013 - Kuantan, Pahang, Malaysia
    Duration: 1 Jul 20133 Jul 2013

    Conference

    Conference2nd International Conference on Mechanical Engineering Research, ICMER 2013
    CountryMalaysia
    CityKuantan, Pahang
    Period1/07/133/07/13

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  • Cite this

    Yazid, A. W. M., Sidik, N. A. C., Salim, S. M., & Yusoff, N. H. M. (2013). Numerical prediction of air flow within street canyons based on different two-equation k-ε models. In IOP Conference Series: Materials Science and Engineering (1 ed., Vol. 50). [012012] https://doi.org/10.1088/1757-899X/50/1/012012