Comparisons of Statistics for Wind Speeds Around an Isolated Building Determined by Wind-tunnel Experiment and Numerical Simulation

DOI 機関リポジトリ (HANDLE) オープンアクセス
  • T. Tong
    九州大学大学院総合理工学研究院
  • Y. Li
    九州大学大学院総合理工学研究院 九州大学大学院工学研究院
  • W. Wang
    九州大学大学院総合理工学研究院 九州大学大学院工学研究院
  • 池谷 直樹
    九州大学大学院総合理工学研究院 九州大学大学院工学研究院

説明

Accurately predicting low-occurrence wind speeds around urban structures is vital for proper building design as well as pedestrian safety. Although Large-eddy simulation (LES) is often used as a high-fidelity model compared to Reynolds-averaged Navier–Stokes (RANS) simulation, current validation processes mainly compare fundamental statistics of the mean and standard deviations of the wind speed. Discrepancies between LESs and wind-tunnel experiments (WTE) remain unclear, particularly regarding physical quantities that characterize the unsteadiness of turbulent flows, such as probability densities, power spectral densities, and high-order moments of the wind speed. This study evaluates LES's results in predicting unsteady wind behavior around a 1:1:2 block model. Two advection schemes in LESs, including first-order upwind and second-order linear were investigated. The results show notable discrepancies, particularly in high-order statistics with WTE consistently exhibiting higher energy levels across all frequencies. These findings underscore the need to refine numerical models to improve their predictive accuracy.

収録刊行物

キーワード

詳細情報 詳細情報について

  • CRID
    1390302315058672384
  • DOI
    10.5109/7323337
  • HANDLE
    2324/7323337
  • ISSN
    24341436
  • 本文言語コード
    en
  • 資料種別
    conference paper
  • データソース種別
    • JaLC
    • IRDB
    • Crossref
  • 抄録ライセンスフラグ
    使用可

問題の指摘

ページトップへ