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Numerical simulation of atmospheric boundary layer and turbulence in urban district

Research Project

Project/Area Number 17K06570
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Hydraulic engineering
Research InstitutionTokyo Institute of Technology

Principal Investigator

Inagaki Atsushi  東京工業大学, 環境・社会理工学院, 助教 (80515180)

Co-Investigator(Kenkyū-buntansha) 小野寺 直幸  国立研究開発法人日本原子力研究開発機構, システム計算科学センター, 研究職 (50614484)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords大気境界層 / 都市大気環境 / 建物後流 / 格子ボルツマン法 / LES / 大規模構造 / 都市大気乱流 / 都市街区 / 格子ボルツマン法LES / 浮力 / 都市大気境界層 / 都市街区の流れ / 大規模数値計算 / LBM / 熱 / 大規模計算 / 都市気象
Outline of Final Research Achievements

This study developed a model to compute non-neutral atmospheric boundary layer in urban area by means of lattice Boltzmann method with large eddy simulation model. The advection of heat is expressed by a finite difference method, and the effect of buoyancy is implemented using the Boussinesq approximation. A test simulation of air flows over a homogeneously heated flat surface represents the basic characteristics of the convective boundary layer, and quantitatively equivalent results to a finite difference model. The developed model is used to simulate a convective urban boundary layer. A direct interaction of the flows in the urban district and the mixed layer convection was confirmed.

Academic Significance and Societal Importance of the Research Achievements

格子ボルツマン法は従来の流体計算手法に比べGPUを用いた並列計算性能が高く、大規模計算に向いている。本研究ではそれを日中の大気境界層計算に適用したが、これにより例えば大気境界層の流れと都市街区の流れを同時に解くことができ、都市の歩行者が実際に受ける大気環境の形成過程について数値計算により検討することが可能となる。また現在の計算資源を考慮すると計算領域は数百km程度まで拡張可能であり、局地循環の影響なども陽的に考慮することができるようになる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2019 2018 2017

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (7 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] 地上水平風速の年間スペクトル特性とモデリング2018

    • Author(s)
      何 暁卿・稲垣 厚至・神田 学
    • Journal Title

      土木学会論文集B1(水工学)

      Volume: 74(5)

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] 移動観測に基づく都市街区内の微気候のアンサンブル平均特性2018

    • Author(s)
      河本陸,稲垣厚至,神田学,Muhammad Rezza
    • Journal Title

      土木学会論文集B1(水工学)

      Volume: 74(4)

    • NAID

      130007628205

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 格子ボルツマン法による大気境界層の計算2019

    • Author(s)
      稲垣厚至、小野寺直幸、神田学、青木尊之、渡辺力
    • Organizer
      気象学会2019年度春季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Numerical Simulation of Urban-boundary layer with Explicitly Resolving Buildings Structures2019

    • Author(s)
      Atsushi Inagaki, Meral Yucel, Manabu Kanda
    • Organizer
      AOGS 16th Annual Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Communication reduced multi-time-step algorithm for the AMR-based lattice Boltzmann method on GPU-rich supercomputers2019

    • Author(s)
      Onodera N, Idomura Y, Yussuf A, Shimokawabe T
    • Organizer
      The 1st R-CCS International Symposium
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Lattice Boltzmann simulation of unstable urban boundary layer over heterogeneous topography2018

    • Author(s)
      Inagaki A, Onodera N, Kanda M, Aoki T
    • Organizer
      10th International Conference on Urban Climate
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] ACCELERATION OF PLUME DISPERSION SIMULATION USING LOCALLY MESH-REFINED LATTICE BOLTZMANN METHOD2018

    • Author(s)
      Onodera N, Idomura Y
    • Organizer
      Proceedings of 26th International Conference on Nuclear Engineering (ICONE-26)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Communication Reduced Multi-time-step Algorithm for Real-time Wind Simulation on GPU-based Supercomputers2018

    • Author(s)
      Onodera N, Idomura Y, Yussuf A, Shimokawabe T
    • Organizer
      Proceedings of 9th Workshop on Latest Advances in Scalable Algorithms for Large-Scale Systems (ScalA 2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Urban boundary layer analysis of flat and realistic slope cases in a large-scale2017

    • Author(s)
      Wangsaputra Y, Inagaki A, Kanda M, Onodera N, Aoki T
    • Organizer
      日本流体力学会年会2017
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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