Aerodynamic effect of overhang on a turbulent flow field within a two-dimensional street canyon

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  • Mohamad Mohd Faizal
    Universiti Teknologi MARA | Department of Energy and Environmental Engineering, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University : Graduate Student
  • 萩島 理
    九州大学大学院総合理工学研究院エネルギー環境共生工学部門 : 准教授
  • 池谷 直樹
    九州大学大学院総合理工学研究院エネルギー環境共生工学部門 : 助教
  • 谷本 潤
    九州大学大学院総合理工学研究院エネルギー環境共生工学部門 : 教授
  • Omar Abd Rahman
    Universiti Teknologi MARA

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説明

This paper reports the results of flow field analysis within and above a two-dimensional street canyon with various overhang lengths using large-eddy simulation (LES). Simulations were conducted for a constant canyon aspect ratio of W/H = 3, where W is the street width and H is the building height. Three different overhang lengths were simulated with P = 0H, 0.5H, and 1H in order to derive the mean and instantaneous flow characteristics. The results are compared with wind tunnel experiments for validation. The LES results of the mean flow with the P = 0H condition agree fairly well with the wind tunnel data. However, profiles of the standard deviation for the streamwise and vertical velocity components show large discrepancies at all measured locations. In addition, an increase in overhang length on both building façades significantly modifies the in-canyon flow pattern by limiting the penetration of the bulk flow into the canyon layer.

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詳細情報 詳細情報について

  • CRID
    1390009224842796416
  • NII論文ID
    120005663070
  • NII書誌ID
    AA1147319X
  • DOI
    10.15017/1525830
  • HANDLE
    2324/1525830
  • 本文言語コード
    en
  • 資料種別
    departmental bulletin paper
  • データソース種別
    • JaLC
    • IRDB
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用可

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