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Implementation of the RANS-based CFD method reproducing organized unsteady flow fluctuation in wind environment around buildings

Research Project

Project/Area Number 25420616
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Architectural environment/Equipment
Research InstitutionNiigata Institute of Technology

Principal Investigator

Tominaga Yoshihide  新潟工科大学, 工学部, 教授 (00278079)

Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords市街地風環境 / 非定常変動 / CFD / RANS / 風環境 / 市街地 / 汚染質拡散 / CFD / RANS / 非定常 / 建物周辺気流 / 組織的非定常変動 / 乱流変動 / URANS / 風洞実験
Outline of Final Research Achievements

The performance of the unsteady Reynolds-averaged Navier-Stokes (URANS) turbulence modeling of the flow field around an isolated building was examined. The unsteady fluctuation behind the building was successfully reproduced by URANS computation. The URANS computation successfully contributed to the reproduction of a certain part of the large-scale unsteady flow patterns around the building, and enabled more accurate prediction of the velocity distributions behind the building compared to the steady-RANS (SRANS) computation. The URANS simulations also yielded larger estimates of the concentration diffusions behind the buildings than SRANS and improved the accuracy of the estimation of the mean concentration.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (8 results)

All 2016 2015 2014 Other

All Int'l Joint Research (1 results) Journal Article (2 results) (of which Peer Reviewed: 2 results,  Acknowledgement Compliant: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results) Remarks (2 results)

  • [Int'l Joint Research] コンコルディア大学(カナダ)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Flow around a high-rise building using steady and unsteady RANS CFD: Effect of large-scale fluctuations on the velocity statistics2015

    • Author(s)
      Yoshihide Tominaga
    • Journal Title

      Journal of Wind Engineering and Industrial Aerodynamics

      Volume: 142 Pages: 93-103

    • DOI

      10.1016/j.jweia.2015.03.013

    • Related Report
      2015 Annual Research Report 2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Air flow around isolated gable-roof buildings with different roof pitches: Wind tunnel experiments and CFD simulations2015

    • Author(s)
      Yoshihide Tominaga,Shin-ichi Akabayashi, Takuya Kitahara, Yuki Arinami
    • Journal Title

      Building and Environment

      Volume: 84 Pages: 204-213

    • DOI

      10.1016/j.buildenv.2014.11.012

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] CFDに基づく市街地の汚染質・熱拡散の予測手法に関する研究:非定常RANS解析の汚染質拡散への適用2016

    • Author(s)
      富永禎秀
    • Organizer
      日本建築学会大会(九州)学術講演会
    • Place of Presentation
      福岡大学
    • Year and Date
      2016-08-24
    • Related Report
      2015 Annual Research Report
  • [Presentation] CFD simulations of near-field dispersion around isolated cubical buildings: Evaluation of URANS2016

    • Author(s)
      Yoshihide Tominaga, Ted Stathopoulos
    • Organizer
      8th International Colloquium on Bluff Body Aerodynamics and Applications (BBAA VIII)
    • Place of Presentation
      Northeastern University, Boston, Massachusetts, USA
    • Year and Date
      2016-06-07
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CFD simulation of flowfield around a high-rise building: Model evaluation of URANS2014

    • Author(s)
      Yoshihide Tominaga
    • Organizer
      6th International Symposium on Computational Wind Engineering (CWE2014)
    • Place of Presentation
      Hamburg, Germany
    • Related Report
      2013 Research-status Report
  • [Remarks] 都市環境・風工学研究室(富永研究室)ホームページ

    • URL

      http://www.ytomi.net/tomilab/

    • Related Report
      2015 Annual Research Report
  • [Remarks] 新潟工科大学(建築学科) 都市環境・風工学研究室 富永研究室

    • URL

      http://www.ytomi.net/tomilab/

    • Related Report
      2014 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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