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Theoretical elucidation for spatiotemporal structures of turbulent particle transports and landform patterns in solid-gas multiphase flow

Research Project

Project/Area Number 17K14353
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Mathematical physics/Fundamental condensed matter physics
Research InstitutionNiigata University

Principal Investigator

Niiya Hirofumi  新潟大学, 研究推進機構, 特任助教 (80794982)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords固気混相流 / 飛砂 / 飛雪 / 数値モデリング / Large-eddy simulation / スプラッシュ過程 / 傾斜地形 / 埋め込み境界法 / 吹雪 / 画像解析 / 地形形成 / Large-Eddy Simulation / 数理物理 / 乱流輸送
Outline of Final Research Achievements

This study aimed to investigate the mechanism of blown sand and drifting snow with complex spatio-temporal structures. I developed a new model for turbulent transports of solid particles named as "Large-eddy simulation coupled with Lagrangian snow transport model." Numerical simulations showed the following result. The intermittent transport is formed in the low-wind condition because of the stop-start saltation movement, whereas the continuous transport exhibiting the streak pattern in the streamwise direction is formed in the relatively high-wind condition.

Academic Significance and Societal Importance of the Research Achievements

本研究成果である固体粒子の乱流輸送モデルは,粒子運動力学と流体力学で培われた手法を相互に組み合わせており,既存の観測・実験的表式を理論的に裏付けするとともに,これまで計測が困難であった地表面近傍の輸送特性や跳躍・浮遊層に及ぶ輸送構造の変動性を解明する新たな手法となり得る.また,本成果は,砂嵐や吹雪など固気混相流の自然現象の高精度予測,例えば,発生条件やその強度の推定に繋がり,自然災害の防災・減災に資することが期待される.

Report

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

    (29 results)

All 2020 2019 2018 2017 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (25 results) (of which Int'l Joint Research: 8 results,  Invited: 1 results) Remarks (1 results)

  • [Journal Article] Simple Particle Model for Low-Density Granular Flow Interacting with Ambient Fluid2020

    • Author(s)
      Hirofumi Niiya, Akinori Awazu, Hiraku Nishimori
    • Journal Title

      Geosciences

      Volume: 10 Issue: 2 Pages: 69-69

    • DOI

      10.3390/geosciences10020069

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Development of a large-eddy simulation coupled with Lagrangian snow transport model2018

    • Author(s)
      Okaze Tsubasa、Niiya Hirofumi、Nishimura Kouichi
    • Journal Title

      Journal of Wind Engineering and Industrial Aerodynamics

      Volume: 183 Pages: 35-43

    • DOI

      10.1016/j.jweia.2018.09.027

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Development of a large-eddy simulation coupled Lagrangian snow transport model2018

    • Author(s)
      Tsubasa Okaze, Hirofumi Niiya, and Kouichi Nishimura
    • Journal Title

      Proceedings of International Workshop on Wind-Related Disasters and Mitigation

      Volume: -

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] Investigation of the spatio-temporal variability of blowing snow2019

    • Author(s)
      K. Nishimura, M. Nemoto, T. Okaze, H. Niiya
    • Organizer
      The 27th IUGG General Assembly
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Transition of Snow-Transport Patterns from Intermittency to Continuity2019

    • Author(s)
      H. Niiya, T. Okaze, M. Nemoto, K. Nishimura
    • Organizer
      The 27th IUGG General Assembly
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] スプラッシュ過程に関する風洞実験:高速度カメラによる雪粒子の飛跡2019

    • Author(s)
      新屋啓文
    • Organizer
      雪氷圏変動把握にむけた積雪表面近傍の現象理解に関する研究集会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 接地層における粒子輸送形態の変化:間欠性から連続性へ2019

    • Author(s)
      新屋啓文,大風翼,根本征樹,西村浩一
    • Organizer
      混相流シンポジウム2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 2018年冬期の北海道川上郡弟子屈町における吹雪の長期観測2019

    • Author(s)
      増澤諭香,新屋啓文,大宮哲,大風翼
    • Organizer
      雪氷研究大会(2019・山形)
    • Related Report
      2019 Annual Research Report
  • [Presentation] 1つの吹雪イベントを対象とした2次元フェンス周辺の吹きだまり観測2019

    • Author(s)
      大風翼,新屋啓文,大宮哲,砂子宗次郎,西村浩一
    • Organizer
      雪氷研究大会(2019・山形)
    • Related Report
      2019 Annual Research Report
  • [Presentation] 雪粒子の空気輸送モデルによる地吹雪メカニズムの解明 -その5 間欠性から連続性への輸送形態の変化-2019

    • Author(s)
      新屋啓文,大風翼,根本征樹,西村浩一
    • Organizer
      雪氷研究大会(2019・山形)
    • Related Report
      2019 Annual Research Report
  • [Presentation] 風速強度に応じた粒子輸送形態の遷移:間欠性から持続性へ2019

    • Author(s)
      新屋啓文,大風翼,西村浩一
    • Organizer
      日本物理学会 第74回年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 低温風洞におけるスプラッシュ過程の測定2018

    • Author(s)
      新屋啓文,大宮哲,根本征樹,大風翼
    • Organizer
      日本雪氷学会 北信越支部大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 高密度集中観測による吹雪の時空間構造の解明2018

    • Author(s)
      根本征樹,西村浩一,大宮哲,櫻井俊光,下山宏,新屋啓文,羽賀秀樹,伊藤陽一
    • Organizer
      雪氷研究大会(2018・札幌)
    • Related Report
      2018 Research-status Report
  • [Presentation] 雪粒子の空気輸送モデルによる地吹雪メカニズムの解明 -その3 風速増加に伴う輸送形態の変化-2018

    • Author(s)
      新屋啓文,大風翼,西村浩一
    • Organizer
      雪氷研究大会(2018・札幌)
    • Related Report
      2018 Research-status Report
  • [Presentation] 雪粒子の空気輸送モデルによる地吹雪メカニズムの解明 -その4 ハイスピードカメラによるスプラッシュ過程の把握-2018

    • Author(s)
      大風翼,新屋啓文,大宮哲,根本征樹
    • Organizer
      雪氷研究大会(2018・札幌)
    • Related Report
      2018 Research-status Report
  • [Presentation] Wind-tunnel experiments on splash process: three-dimensional particle track with high-speed cameras2018

    • Author(s)
      H. Niiya, S. Omiya, M. Nemoto, T. Okaze
    • Organizer
      International symposium on snow and avalanche in Niseko
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Splash process due to a grain impact on granular bed2018

    • Author(s)
      T. Tanabe, H. Niiya, A. Awazu, H. Nishimori
    • Organizer
      International symposium on snow and avalanche in Niseko
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of a large-eddy simulation coupled with Lagrangian snow transport model2018

    • Author(s)
      T. Okaze, H. Niiya, K. Nishimura
    • Organizer
      International symposium on snow and avalanche in Niseko
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Observation of the spatio-temporal variability of blowing snow2018

    • Author(s)
      M. Nemoto, K. Nishimura, S. Omiya, T. Sakurai, K. Shimoyama, H. Niiya, H. Haga, Y. Ito
    • Organizer
      International symposium on snow and avalanche in Niseko
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of a large-eddy simulation coupled Lagrangian snow transport model2018

    • Author(s)
      Tsubasa Okaze, Hirofumi Niiya, and Kouichi Nishimura
    • Organizer
      International Workshop on Wind-Related Disasters and Mitigation
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 乱流境界層における固体粒子の非定常輸送2017

    • Author(s)
      新屋啓文,大風翼,西村浩一
    • Organizer
      日本流体力学会 第31回数値流体力学シンポジウム
    • Related Report
      2017 Research-status Report
  • [Presentation] 雪粒子の空気輸送モデルによる地吹雪メカニズムの解明 -その2 数値計算による境界層中の非定常な地吹雪の再現-2017

    • Author(s)
      大風翼,新屋啓文,西村浩一
    • Organizer
      雪氷研究大会(2017・十日町)
    • Related Report
      2017 Research-status Report
  • [Presentation] 雪粒子の空気輸送モデルによる地吹雪メカニズムの解明 -その1 ラージ・エディ・シミュレーションに基づくラグランジュ型雪粒子輸送モデルの構築-2017

    • Author(s)
      新屋啓文,大風翼,西村浩一
    • Organizer
      雪氷研究大会(2017・十日町)
    • Related Report
      2017 Research-status Report
  • [Presentation] 粒子の空気輸送モデルにおける時空間パターンの定量的解析2017

    • Author(s)
      新屋啓文,西村浩一,大風翼
    • Organizer
      日本物理学会 2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 粒度分布による粉体スプラッシュへの影響2017

    • Author(s)
      田邊章洋,新屋啓文,粟津暁紀,西森拓
    • Organizer
      日本物理学会 2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 乱流境界層における固体粒子の集団輸送モデリング2017

    • Author(s)
      新屋啓文,西村浩一,大風翼
    • Organizer
      日本流体力学会 年会2017
    • Related Report
      2017 Research-status Report
  • [Presentation] ラージ・エディ・シミュレーションに基づくラグランジュ型飛雪モデルの開発2017

    • Author(s)
      大風翼,新屋啓文,西村浩一
    • Organizer
      日本風工学会年会
    • Related Report
      2017 Research-status Report
  • [Presentation] Numerical Study of Splash Detail Due to Grain Impact on Granular Bed2017

    • Author(s)
      T. Tanabe, H. Niiya, A. Awazu, H. Nishimori
    • Organizer
      European Geosciences Union General Assembly 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Remarks] 新屋啓文のホームページ

    • URL

      http://hniiya.sakura.ne.jp/

    • Related Report
      2019 Annual Research Report 2018 Research-status Report 2017 Research-status Report

URL: 

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

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