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タイトル
  • Evaluation of exceeding wind speed at a pedestrian level around a 1:1:2 isolated block model
その他のタイトル
  • Evaluation of exceeding wind speed at a pedestrian level around a 1:1:2 isolated block model
作成者
    • Ikegaya, N.
    • Ikegaya, N.
    • Kawaminami, T.
    • Kawaminami, T.
    • 大風, 翼
    • Okaze, Tsubasa
    • Hagishima, A.
    • Hagishima, A.
アクセス権 metadata only access
主題
  • Other Exceeding wind speed
  • Other Exceeding wind speed
  • Other Large-eddy simulation
  • Other Large-eddy simulation
  • Other Probability density
  • Other Probability density
  • Other Single-block model
  • Other Single-block model
内容注記
  • Other We analyzed the datasets of the flow fields at a pedestrian level around a 1:1:2 isolated block model obtained by a large eddy simulation. The purpose was to understand the effect of the block on the probability density distributions of each velocity component and wind speed, and to propose a reasonable model to predict the percentile values of wind speed (exceeding wind speeds) for the pedestrian level. The probability density distributions were skewed, especially near the block side, whereas other vicinities of the front and wake of the block did not cause significant change in the distributions. Consequently, the probability density distributions were standardized using mean and standard deviations to compare with the normal distribution. Clearly, rare wind events had an occurrence frequency of less than 10%, which shows large discrepancies from the normal distribution. Accordingly, the exceeding wind speeds for each velocity component and magnitude were determined. The exceeding wind speeds of each velocity component were poorly estimated by the mean wind speed. Nonetheless, better prediction of the exceeding wind speed of each velocity component is possible by using the peak factor. By contrast, the exceeding wind speed of the velocity magnitude is clearly proportional to the mean wind speed.
  • Other We analyzed the datasets of the flow fields at a pedestrian level around a 1:1:2 isolated block model obtained by a large eddy simulation. The purpose was to understand the effect of the block on the probability density distributions of each velocity component and wind speed, and to propose a reasonable model to predict the percentile values of wind speed (exceeding wind speeds) for the pedestrian level. The probability density distributions were skewed, especially near the block side, whereas other vicinities of the front and wake of the block did not cause significant change in the distributions. Consequently, the probability density distributions were standardized using mean and standard deviations to compare with the normal distribution. Clearly, rare wind events had an occurrence frequency of less than 10%, which shows large discrepancies from the normal distribution. Accordingly, the exceeding wind speeds for each velocity component and magnitude were determined. The exceeding wind speeds of each velocity component were poorly estimated by the mean wind speed. Nonetheless, better prediction of the exceeding wind speed of each velocity component is possible by using the peak factor. By contrast, the exceeding wind speed of the velocity magnitude is clearly proportional to the mean wind speed.
  • Other identifier:oai:t2r2.star.titech.ac.jp:50529219
出版者 Elsevier B.V. Elsevier B.V.
日付
    Created2020-06-22 , Issued2020-06
言語
  • eng
資源タイプ journal article
出版タイプ NA
資源識別子 URI http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100826448
関連
  • isIdenticalTo DOI https://doi.org/10.1016/j.jweia.2020.104193
収録誌情報
  • Journal of Wind Engineering and Industrial Aerodynamics
  • 巻201 開始ページ104193
コンテンツ更新日時 2023-06-26