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On the realization of unsteady simulation for extremely high Reynolds-number turbulent flows

Research Project

Project/Area Number 19K12005
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 60100:Computational science-related
Research InstitutionKyushu University

Principal Investigator

Abe Ken-ichi  九州大学, 工学研究院, 教授 (20315104)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords計算力学 / 乱流モデル / LES / RANS / ハイブリッドモデル / 計算科学 / 数値流体力学 / 乱流 / 高レイノルズ数
Outline of Research at the Start

計算科学関連分野において学術的に難しくまた実用上でも重要な,高レイノルズ数乱流場(自動車や航空機の周りに現れる極めて速くかつ非常に乱れている流れ場)に対する高精度のコンピューターシミュレーションを低コストで実現するために,従来手法を格段に発展させた高性能非定常乱流解析技術を新たに構築・提案する.

Outline of Final Research Achievements

This study elucidated that an advanced anisotropy-resolving hybrid LES/RANS model works very well even for extremely high-Reynolds-number turbulent flows together with a wall model as the wall-boundary condition.

Academic Significance and Societal Importance of the Research Achievements

非等方LES/RANSハイブリッドモデルが壁モデルと組み合わせて極めて高いRe数の乱流場に適用された場合でも十分機能することが示されたことにより,実用的な場面で多く見られる極めて高いRe数の乱流場に対する「低コスト・高精度数値解析」への道筋をつけることができた.
この技術は,今後さらに発展させていくことにより,基礎的な乱流解析はもとより,自動車空気力学や航空機空気力学等における流体現象解析においても有力な解析手法の一つとなることが期待される.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (11 results)

All 2021 2020 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (8 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Detailed Investigation of Subgrid Scale Models in Large-Eddy Simulation Using High Aspect-Ratio Grid Spacing2021

    • Author(s)
      Ken-ichi ABE
    • Journal Title

      Physics of Fluids

      Volume: Vol. 33 Issue: 11

    • DOI

      10.1063/5.0070183

    • NAID

      120007175194

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Performance of a hybrid LES/RANS model combined with a wall function for predicting quite high Reynolds-number turbulent channel flows up to <i>Re</i><sub>τ</sub>=6×10<sup>7</sup>2020

    • Author(s)
      Ken-ichi ABE
    • Journal Title

      Journal of Thermal Science and Technology

      Volume: 15 Issue: 2 Pages: JTST0014-JTST0014

    • DOI

      10.1299/jtst.2020jtst0014

    • NAID

      130007883974

    • ISSN
      1880-5566
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Notable effect of the subgrid-scale stress anisotropy on mean-velocity prediction through budget of the grid-scale Reynolds-shear stress2019

    • Author(s)
      Abe Ken-ichi
    • Journal Title

      Physics of Fluids

      Volume: 31 Issue: 10 Pages: 105103-105103

    • DOI

      10.1063/1.5121528

    • NAID

      120006952144

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] モード内周波数特性を考慮した固有直交分解による簡易車体周り流れの詳細考察2021

    • Author(s)
      藏原 幹弥,木原 尚,安倍 賢一
    • Organizer
      第35回数値流体力学シンポジウム,D04-1
    • Related Report
      2021 Annual Research Report
  • [Presentation] 縦渦の相互干渉を利用した空力特性制御に関する研究2021

    • Author(s)
      田中 紘生,木原 尚,安倍 賢一
    • Organizer
      第35回数値流体力学シンポジウム,A07-1
    • Related Report
      2021 Annual Research Report
  • [Presentation] 機械学習を利用した非等方RANSモデルの予測精度向上に関する研究2021

    • Author(s)
      沖本 和貴,木原 尚,安倍 賢一
    • Organizer
      第35回数値流体力学シンポジウム,A06-1
    • Related Report
      2021 Annual Research Report
  • [Presentation] 機械学習を利用したSGS応力の予測精度向上に関する一考察2020

    • Author(s)
      廣渡 祥太,木原 尚,安倍 賢一
    • Organizer
      第34回数値流体力学シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] モード内周波数特性を考慮した固有直交分解によるチャネル乱流内速度場の詳細考察2020

    • Author(s)
      渡部 峻佑,木原 尚,安倍 賢一
    • Organizer
      第34回数値流体力学シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] Investigation of the Effect of an Anisotropy-Resolving Subgrid-Scale Model on Budgets of the Reynolds Stresses2019

    • Author(s)
      Abe Ken-ichi
    • Organizer
      Proceedings of 11th International Symposium on Turbulence and Shear Flow Phenomena, Southampton, Paper No. P21
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Performance of a Hybrid LES/RANS Model Combined with a Wall Function for Predicting Quite High Reynolds-number Turbulent Channel Flows up to Reτ = 6x10**72019

    • Author(s)
      Abe Ken-ichi
    • Organizer
      Proceedings of the Asian Symposium on Computational Heat Transfer and Fluid Flow-2019, Tokyo, Paper No. I314
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] On the Role of Anisotropic Term in Subgrid-scale Model for Enhancing Energy Spectrum in High-wavenumber Region2019

    • Author(s)
      Abe Ken-ichi
    • Organizer
      Proceedings of The 72nd Annual Meeting of the APS Division of Fluid Dynamics, Seattle, Paper No. B19.06
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-01-30  

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