Modeling of turbulence generation at the interface of hybrid turbulence simulation

• Project/Area Number: 17K06143
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: The University of Tokyo
• Principal Investigator: Hamba Fujihiro 東京大学, 生産技術研究所, 教授 (20251473)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 乱流モデル / RANS / LES / ハイブリッドモデル / 流体 / 乱流

Outline of Final Research Achievements

Vortical structures associated with the energy transfer in the scale space were examined to adequately model the turbulence generation at the interface between the RANS and LES regions of hybrid turbulence simulation. A new energy density in the scale space was proposed using the two-point velocity correlation and it was applied to the analysis of the DNS data of turbulent channel flow. As a result, streamwise vortical structures were found which are associated with the inverse energy cascade in the scale space. LES models were examined to sustain the vortical structures and to adequately generate the turbulent fluctuations.

Academic Significance and Societal Importance of the Research Achievements

自然界や工学分野でよく見られる高レイノルズ数乱流をLESで数値計算する際、壁面近くや上流領域でRANSを用いることが多い。RANSからLESへ切り替わる境界面近くでは乱れ速度の生成を適切に再現する必要がある。単に経験的な関数で乱れを付け加えるのでなく、物理的な機構に基づくモデル式を提案するために、本研究で行われたスケール空間でのエネルギー輸送とそれと伴う渦構造の解析は重要な役割を果たす。

Research Products

• [Journal Article] Inverse energy cascade and impinging flow in turbulent channel flow (2020)
  • Author(s): 半場 藤弘
  • Journal Title: SEISAN KENKYU Volume: 72 Issue: 1 Pages: 19-23
  • DOI: 10.11188/seisankenkyu.72.19
  • NAID: 130007792511
  • ISSN: 0037-105X, 1881-2058
  • Year and Date: 2020-01-01
  • Open Access
• [Journal Article] Time development of energy spectrum in rotating inhomogeneous turbulence accompanied with helicity injection (2020)
  • Author(s): 稲垣 和寛
  • Journal Title: SEISAN KENKYU Volume: 72 Issue: 1 Pages: 37-40
  • DOI: 10.11188/seisankenkyu.72.37
  • NAID: 130007792524
  • ISSN: 0037-105X, 1881-2058
  • Year and Date: 2020-01-01
  • Open Access
• [Journal Article] Energy cascade and vortex structure in turbulent channel flow (2019)
  • Author(s): 半場 藤弘
  • Journal Title: SEISAN KENKYU Volume: 71 Issue: 1 Pages: 5-8
  • DOI: 10.11188/seisankenkyu.71.5
  • NAID: 130007584035
  • ISSN: 0037-105X, 1881-2058
  • Year and Date: 2019-01-01
  • Open Access
• [Journal Article] Role of the Coriolis force and helicity on sustainment of mean velocity profile in rotating inhomogeneous turbulence (2019)
  • Author(s): 稲垣 和寛、半場 藤弘
  • Journal Title: SEISAN KENKYU Volume: 71 Issue: 1 Pages: 15-18
  • DOI: 10.11188/seisankenkyu.71.15
  • NAID: 130007584776
  • ISSN: 0037-105X, 1881-2058
  • Year and Date: 2019-01-01
  • Open Access
• [Journal Article] Inverse energy cascade and vortical structure in the near-wall region of turbulent channel flow (2019)
  • Author(s): Hamba Fujihiro
  • Journal Title: Physical Review Fluids Volume: 4 Issue: 11 Pages: 1146091-18
  • DOI: 10.1103/physrevfluids.4.114609
  • Peer Reviewed
• [Journal Article] Higher-order realizable algebraic Reynolds stress modeling based on the square root tensor (2019)
  • Author(s): Inagaki Kazuhiro、Ariki Taketo、Hamba Fujihiro
  • Journal Title: Physical Review Fluids Volume: 4 Issue: 11 Pages: 1146011-18
  • DOI: 10.1103/physrevfluids.4.114601
  • Peer Reviewed
• [Journal Article] サブグリッドスケール乱流モデルにおける生成散逸非平衡効果の検討 (2019)
  • Author(s): 稲垣和寛, 小林宏充
  • Journal Title: ながれ Volume: 38 Pages: 403-406
  • Open Access
• [Journal Article] Analysis of destruction term in transport equation for turbulent energy dissipation rate (2019)
  • Author(s): Hamba Fujihiro、Kanamoto Kouta
  • Journal Title: Theoretical and Computational Fluid Dynamics Volume: 33 Issue: 2 Pages: 181-196
  • DOI: 10.1007/s00162-019-00490-2
  • Peer Reviewed
• [Journal Article] Energy transport due to pressure diffusion enhanced by helicity and system rotation in inhomogeneous turbulence (2018)
  • Author(s): Inagaki Kazuhiro、Hamba Fujihiro
  • Journal Title: Physical Review Fluids Volume: 3 Issue: 12 Pages: 1246011-23
  • DOI: 10.1103/physrevfluids.3.124601
  • Peer Reviewed
• [Journal Article] Turbulent energy density in scale space for inhomogeneous turbulence (2018)
  • Author(s): Hamba Fujihiro
  • Journal Title: Journal of Fluid Mechanics Volume: 842 Pages: 532-553
  • DOI: 10.1017/jfm.2018.155
  • Peer Reviewed
• [Journal Article] Turbulent energy density in scale space defined using filtering function (2018)
  • Author(s): 半場 藤弘
  • Journal Title: SEISAN KENKYU Volume: 70 Issue: 1 Pages: 7-10
  • DOI: 10.11188/seisankenkyu.70.7
  • NAID: 130006322070
  • ISSN: 0037-105X, 1881-2058
  • Open Access
• [Journal Article] Evaluation of axial energy flux in rotating inhomogeneous turbulence (2018)
  • Author(s): 稲垣 和寛、半場 藤弘
  • Journal Title: SEISAN KENKYU Volume: 70 Issue: 1 Pages: 19-23
  • DOI: 10.11188/seisankenkyu.70.19
  • NAID: 130006322031
  • ISSN: 0037-105X, 1881-2058
  • Open Access
• [Presentation] 一様ヘリカル乱流の統計解析 (2020)
  • Author(s): 稲垣和寛
  • Organizer: 日本物理学会第75回年次大会概要集, 17pK45-8
• [Presentation] Energy cascade and vortex structure in turbulent channel flow (2019)
  • Author(s): F. Hamba
  • Organizer: Proceedings of 11th International Symposium on Turbulence and Shear Flow Phenomena, 2A-1
  • Int'l Joint Research
• [Presentation] A realizable turbulence model for the Reynolds stress based on the square root tensor (2019)
  • Author(s): K. Inagaki, T. Ariki, F. Hamba
  • Organizer: Proceedings of 17th European Turbulence Conference, 151
  • Int'l Joint Research
• [Presentation] Modeling the energy flux enhanced in rotating inhomogeneous turbulence (2019)
  • Author(s): K .Inagaki, F. Hamba
  • Organizer: Progress in Turbulence VIII, Springer Proceedings in Physics 226, pp.139-144
  • Int'l Joint Research
• [Presentation] チャネル乱流対数層のエネルギー逆カスケードと渦構造 (2019)
  • Author(s): 半場藤弘
  • Organizer: 第65回理論応用力学講演会, C000026
• [Presentation] サブグリッドスケール乱流モデルにおける生成散逸非平衡効果の検討 (2019)
  • Author(s): 稲垣和寛, 小林宏充
  • Organizer: 日本流体力学会年会2019講演論文集, 乱流(1)-3
• [Presentation] チャネル乱流におけるエネルギー逆カスケードと衝突流 (2019)
  • Author(s): 半場藤弘
  • Organizer: 第33回数値流体力学シンポジウム講演論文集, A06-3
• [Presentation] 非等方解像SGS乱流モデルにおける非等方項の物理的役割 (2019)
  • Author(s): 稲垣和寛, 小林宏充
  • Organizer: 第33回数値流体力学シンポジウム講演論文集, A07-3
• [Presentation] チャネル乱流のエネルギー逆カスケードに伴う渦構造 (2019)
  • Author(s): 半場藤弘
  • Organizer: 日本物理学会第74回年次大会概要集, p.2691
• [Presentation] ヘリシティを伴う回転系非一様乱流におけるスケール間相互作用 (2019)
  • Author(s): 稲垣和寛, 半場藤弘
  • Organizer: 日本物理学会第74回年次大会概要集, p.2779
• [Presentation] Modeling the energy flux enhanced in rotating inhomogeneous turbulence (2018)
  • Author(s): K.Inagaki, F.Hamba
  • Organizer: Proceedings of the interdisciplinary Turbulence initiative (iTi) 2018, p.29
  • Int'l Joint Research
• [Presentation] Reynolds応力の平方根を用いた実現性条件を満足する乱流モデルの定式化 (2018)
  • Author(s): 稲垣和寛, 有木健人, 半場藤弘
  • Organizer: ながれ, Vol.37, pp.111-117
• [Presentation] チャネル乱流におけるエネルギーカスケードと渦構造 (2018)
  • Author(s): 半場藤弘
  • Organizer: 日本流体力学会年会2018講演論文集, 乱流(3)-2
• [Presentation] 浮力の効果を伴う乱流における実現性条件とモデリング (2018)
  • Author(s): 稲垣和寛, 有木健人, 半場藤弘
  • Organizer: 日本物理学会2018年秋季大会概要集, p.2291
• [Presentation] 乱流エネルギー散逸率の輸送方程式の消散項 (2018)
  • Author(s): 半場藤弘
  • Organizer: 日本物理学会第73回年次大会
• [Presentation] 回転系非一様乱流における平均速度分布の維持に対するヘリシティと回転の効果 (2018)
  • Author(s): 稲垣和寛,半場藤弘
  • Organizer: 日本物理学会第73回年次大会
• [Presentation] 乱流エネルギー散逸率輸送方程式のレイノルズ数依存性 (2017)
  • Author(s): 半場藤弘
  • Organizer: 第31回数値流体力学シンポジウム
• [Presentation] Reynolds応力の平方根を用いた実現性条件を満足する乱流モデルの定式化 (2017)
  • Author(s): 稲垣和寛,有木健人,半場藤弘
  • Organizer: 第31回数値流体力学シンポジウム
• [Remarks] 東京大学 生産技術研究所 半場研究室 研究内容
  • URL: http://www.iis.u-tokyo.ac.jp/~hamba/research.html