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Momentum transfer mechanisms across high-concentrated form layer generated by strong wind shear above water surface

Research Project

Project/Area Number 18K03953
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 19010:Fluid engineering-related
Research InstitutionUniversity of Hyogo

Principal Investigator

Takagaki Naohisa  兵庫県立大学, 工学研究科, 准教授 (00554221)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords運動量輸送 / 風波 / 気泡層 / 台風 / 砕波
Outline of Final Research Achievements

It is of great importance to predict the development and decay of tropical cyclones accurately in order to minimize loss of life and damage, since tropical cyclones wreak catastrophic damages to a local society. The purpose of this study is to investigate the mechanism of the momentum transfer across the bubbly wavy air-water interface at extreme high wind speed. The results show that; (1) the foam layer is developed on the water interface by high wind shear; (2) the equilibrium range constant of the wind waves depends on the phase velocity and wind speed; and (3) the effects of the liquid current on the foam-layer development and air-water momentum transfer is negligibly small.

Academic Significance and Societal Importance of the Research Achievements

本研究では,大型水槽等を使用した複数の室内実験を実施し,気流場と水面波の解析を行う事で,気泡層を伴う水面を通しての運動量輸送機構の一端を明らかにするに至った.さらに,風波の平衡エネルギレベルについての新たな傾向を明らかにした.これらの学術的知見は,高精度の運動量輸送モデルを確立することに寄与し,ひいては,台風強度の予測精度の向上を実現し社会的価値を生み出すことが期待される.

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (24 results)

All 2021 2020 2019 2018 Other

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (18 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Remarks (3 results)

  • [Journal Article] Effects of air-side freestream turbulence on the development of air-liquid surface waves2020

    • Author(s)
      Takagaki Naohisa、Suzuki Naoya、Takahata Shunsaku、Kumamaru Hiroshige
    • Journal Title

      Experiments in Fluids

      Volume: 61 Issue: 6 Pages: 136-136

    • DOI

      10.1007/s00348-020-02977-9

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of current on wind waves in strong winds2020

    • Author(s)
      Takagaki Naohisa、Suzuki Naoya、Troitskaya Yuliya、Tanaka Chiaki、Kandaurov Alexander、Vdovin Maxim
    • Journal Title

      Ocean Science

      Volume: 16 Issue: 5 Pages: 1033-1045

    • DOI

      10.5194/os-16-1033-2020

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Laboratory measurements of an equilibrium-range constant for wind waves at extremely high wind speeds2018

    • Author(s)
      Takagaki Naohisa、Takane Keita、Kumamaru Hiroshige、Suzuki Naoya、Komori Satoru
    • Journal Title

      Dynamics of Atmospheres and Oceans

      Volume: 84 Pages: 22-32

    • DOI

      10.1016/j.dynatmoce.2018.08.003

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] 高風速域での砕波を伴う大気・海洋間運動量輸送量の測定手法の構築2021

    • Author(s)
      佐々木燦汰、高垣直尚、鈴木直弥
    • Organizer
      波浪研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 高風速下における水面を通しての運動量輸送量の測定2021

    • Author(s)
      三浦徹馬、高垣直尚
    • Organizer
      日本機械学会 関西学生会2021年度学生員卒業研究発表講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Measurement method of the wind stress at high wind speeds in laboratory experiments2020

    • Author(s)
      Temma Onishi, Naoya Suzuki, Naohisa Takagaki
    • Organizer
      2020 Ocean Sciences Meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effects of the sea surface current on the growth of wind wave in laboratory experiment2020

    • Author(s)
      Chiaki Tanaka, Naoya Suzuki, Naohisa Takagaki, Yuliya Troitskaya, Satoru Komori, Alexander Kandaurov, Maxim Vdovin, Masanori Konda
    • Organizer
      2020 Ocean Sciences Meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 強烈な砕波を伴う気液界面における運動量輸送量の測定手法の構築2020

    • Author(s)
      合田総一郎、高垣直尚、鈴木直弥、松田景吾、小森悟、Yuliya Troitskaya
    • Organizer
      日本機械学会 2020年度年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 風波水槽での高風速時の砕波を伴う大気・海洋間運動量輸送の評価2020

    • Author(s)
      合田総一郎、高垣直尚、鈴木直弥、松田景吾、小森悟、Yuliya Troitskaya
    • Organizer
      日本海洋理工学会 2020年度秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 強風時の大気・海洋間運動量輸送に及ぼす浅瀬の影響2020

    • Author(s)
      佐々木燦汰、高垣直尚、鈴木直弥
    • Organizer
      日本海洋理工学会 2020年度秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 気液自由界面の微粒化の観察2020

    • Author(s)
      鳥居元彰、高垣直尚、河南 治、本田逸郎
    • Organizer
      日本機械学会関西支部学生発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 高風速下の気液界面を通しての運動量輸送量の測定2020

    • Author(s)
      高見健大朗、高垣直尚
    • Organizer
      日本機械学会関西支部学生発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 風波水槽での吹送距離延長のための気流ループ法の確立-気流・波ハイブリットループの確立に向けて-2019

    • Author(s)
      上村友祐、高垣直尚、鈴木直弥
    • Organizer
      海洋理工学会春季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 台風下の海水面を通しての運動量・スカラ輸送現象2019

    • Author(s)
      高垣直尚
    • Organizer
      第2回先進的ながれ研究会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 風波水槽での大気・海洋間運動量輸送における表層流の影響の検討に向けた初期実験2019

    • Author(s)
      田中千晶、鈴木直弥、高垣直尚、根田昌典
    • Organizer
      海洋理工学会秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 台風の強度予測技術の開発2019

    • Author(s)
      高垣直尚、鳥居元彰、高見健大朗
    • Organizer
      企業・大学・学生マッチングin Himeji 2019
    • Related Report
      2019 Research-status Report
  • [Presentation] 高風速時の気液界面を通しての運動量輸送量の測定2019

    • Author(s)
      磯川橘花、高根彗太、高垣直尚
    • Organizer
      日本機械学会関西支部学生発表会
    • Related Report
      2018 Research-status Report
  • [Presentation] 風波水槽における気流ループ法の開発2019

    • Author(s)
      清水悠平、高垣直尚
    • Organizer
      日本機械学会関西支部学生発表会
    • Related Report
      2018 Research-status Report
  • [Presentation] 界面活性剤の混入による波高減衰実験2019

    • Author(s)
      高根慧太、高垣直尚
    • Organizer
      日本機械学会関西支部総会
    • Related Report
      2018 Research-status Report
  • [Presentation] Imaging techniques in field of fluid mechanics and applications2018

    • Author(s)
      N. Takagaki
    • Organizer
      7th International conference on informatics, electronics & vision
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 強風速下における抗力係数と風波スペクトルの評価2018

    • Author(s)
      高垣直尚、高根慧太、高畑俊作、岩野耕治、鈴木直弥、小森悟
    • Organizer
      日本流体力学会 年会2018
    • Related Report
      2018 Research-status Report
  • [Remarks] 兵庫県立大学 教員詳細『高垣直尚』

    • URL

      https://www.eng.u-hyogo.ac.jp/outline/faculty/takagaki/index.html

    • Related Report
      2020 Annual Research Report
  • [Remarks] Researchmap『高垣直尚』

    • URL

      https://researchmap.jp/naohisa_takagaki

    • Related Report
      2020 Annual Research Report
  • [Remarks] 兵庫県立大学 研究者データベース『高垣直尚』

    • URL

      http://kyoin.u-hyogo.ac.jp/staff/eng/takagaki/

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

URL: 

Published: 2018-04-23   Modified: 2022-01-27  

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