Experimental investigation of momentum and scalar transfer mechanism across the air-water interface with wave breaking at extremely high wind speeds

• Project/Area Number: 25249013
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Kyoto University
• Principal Investigator: KOMORI SATORU 京都大学, 工学(系)研究科(研究院), 教授 (60127082)
• Co-Investigator(Kenkyū-buntansha): KUROSE RYOICHI 京都大学, 大学院工学研究科, 准教授 (70371622) ; TAKAGAKI NAOHISA 京都大学, 大学院工学研究科, 助教 (00554221) ; 大西 領 国立研究開発法人海洋研究開発機構, その他部局等, その他 (30414361)
• Co-Investigator(Renkei-kenkyūsha): SUZUKI NAOYA 近畿大学, 工学部, 准教授 (40422985)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥43,680,000 (Direct Cost: ¥33,600,000、Indirect Cost: ¥10,080,000); Fiscal Year 2015: ¥12,220,000 (Direct Cost: ¥9,400,000、Indirect Cost: ¥2,820,000); Fiscal Year 2014: ¥13,130,000 (Direct Cost: ¥10,100,000、Indirect Cost: ¥3,030,000); Fiscal Year 2013: ¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
• Keywords: 流体工学 / 輸送現象論 / 台風 / 気候変動 / 海洋工学

Outline of Final Research Achievements

Heat and mass transfer coefficients were measured in a big wind-wave tank. The measurements show that the wind speed dependence on heat and mass transfer coefficients at extremely high wind speeds is different to that at normal wind speeds and the coefficients rapidly increase with increasing wind speed. The effects of fetch on mass transfer across the wind-sheared air-water interface is negligibly small at normal wind speeds. In addition, the momentum and heat transfer fluxes under tropical cyclones were evaluated using our new momentum and heat transfer models and the intensities of tropical cyclones were forecasted by both our new and conventional models. The predictions show that our new models are more reliable than conventional models.

Research Products

• [Journal Article] Effects of turbulent eddies and Langmuir circulations on scalar transfer in a sheared wind-driven liquid flow (2015)
  • Author(s): N. Takagaki, R. Kurose, Y. Tsujimoto, S. Komori, K. Takahashi
  • Journal Title: Physics of Fluids Volume: 27 Issue: 1 Pages: 016603-016603
  • DOI: 10.1063/1.4905845
  • NAID: 120005587815
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Air-water mass transfer mechanism due to the impingement of a single liquid drop on the air-water interface (2014)
  • Author(s): 1.Takagaki, N., Komori, S.
  • Journal Title: Int. J. Multiphase Flow Volume: 60 Pages: 30-39
  • DOI: 10.1016/j.ijmultiphaseflow.2013.11.006
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Relationship between momentum of an impinging drop and intensities of vortex rings generated below free surface (2014)
  • Author(s): N. Takagaki, R. Kurose, Y. Nakajima, Y. Baba, S. Komori
  • Journal Title: International Journal of Multiphase Flow Volume: 65 Pages: 1-10
  • DOI: 10.1016/j.ijmultiphaseflow.2014.05.005
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Mass transfer velocity across the breaking air-water interface at extremely high wind speeds (2013)
  • Author(s): K. Iwano, N. Takagaki, R. Kurose, S. Komori
  • Journal Title: Tellus B Volume: 65 Issue: 1 Pages: 21341-21341
  • DOI: 10.3402/tellusb.v65i0.21341
  • Peer Reviewed
• [Presentation] 室内実験による高風速下での気液界面を通しての乱流輸送現象の解明とモデリング (2016)
  • Author(s): 小森悟
  • Organizer: 日本海洋学会シンポジウム
  • Place of Presentation: 東京，東京大学本郷キャンパス
  • Year and Date: 2016-03-14
  • Invited
• [Presentation] 高風速下かつ長吹送距離における風波気液界面を通しての物質輸送量の評価 (2016)
  • Author(s): 高垣 直尚
  • Organizer: 日本海洋学会シンポジウム
  • Place of Presentation: 東京，東京大学本郷キャンパス
  • Year and Date: 2016-03-14
• [Presentation] 界面活性剤による風波の減衰作用 (2015)
  • Author(s): 木村 厚思，三輪 将也，高垣 直尚，黒瀬 良一，小森 悟
  • Organizer: 化学工学会第48回秋季大会
  • Place of Presentation: 札幌，北海道大学札幌キャンパス
  • Year and Date: 2015-09-09
• [Presentation] Spectral Shape of Wind Waves at Extreme High Wind Speeds (2015)
  • Author(s): Naohisa Takagaki, Satoru Komori, Koji Iwano, Ryoichi Kurose and Naoya Suzuki
  • Organizer: The 7th International Symposium on Gas Transfer at Water Surfaces
  • Place of Presentation: Seattle WA USA
  • Year and Date: 2015-05-18
  • Int'l Joint Research / Invited
• [Presentation] Laboratory Measurements of Momentum, Heat and Mass Transfer across the Air-Water Interface at High Wind Speeds (2015)
  • Author(s): Satoru Komori
  • Organizer: The 7th International Symposium on Gas Transfer at Water Surfaces
  • Place of Presentation: Seattle WA USA
  • Year and Date: 2015-05-18
  • Int'l Joint Research / Invited
• [Presentation] 大気・海洋間の運動量，熱および物質の輸送機構の解明とモデル化 (2015)
  • Author(s): 小森悟
  • Organizer: 日本機械学会関西支部第90期定時総会講演会
  • Place of Presentation: 京都大学桂キャンパス
  • Year and Date: 2015-03-16
  • Invited
• [Presentation] 大気・海洋間を通しての物質輸送 －高ウィンドシア・吹送距離・雨滴衝突の影響－ (2014)
  • Author(s): 高垣直尚
  • Organizer: 日本機械学会関西支部 流体工学懇話会 第174回研究会
  • Place of Presentation: 大阪市立大学 梅田サテライトキャンパス、文化交流センター ホール
  • Year and Date: 2014-12-13
• [Presentation] 風波気液界面を通しての熱輸送に関する直接数値シミュレーション (2014)
  • Author(s): 木村厚思，辻本悠太，高垣 直尚，黒瀬 良一，小森 悟
  • Organizer: 第28回数値流体シンポジウム
  • Place of Presentation: 東京，タワーホール船堀
  • Year and Date: 2014-12-09
• [Presentation] 高風速下における風波気液界面を通しての熱輸送量の評価 (2014)
  • Author(s): 岩野耕治、石田瑞紀、高井敬介、高垣直尚、黒瀬良一、小森悟
  • Organizer: 日本流体力学会 年会2014
  • Place of Presentation: 仙台、東北大学 川内北キャンパス
  • Year and Date: 2014-09-15
• [Presentation] 長吹送距離における風波気液界面を通しての物質輸送量の評価 (2014)
  • Author(s): 高垣直尚，室谷春樹，越智啓介，岩野耕治，黒瀬良一，小森悟
  • Organizer: 日本流体力学会 年会2014
  • Place of Presentation: 仙台、東北大学 川内北キャンパス
  • Year and Date: 2014-09-15
• [Presentation] 風波気液界面における乱流輸送現象 (2014)
  • Author(s): 小森悟
  • Organizer: 日本機械学会2014年度年次大会
  • Place of Presentation: 東京電機大学東京千住キャンパス
  • Year and Date: 2014-09-07
  • Invited
• [Presentation] Statistical properties of wind waves generated in extremely-high wind condition (2014)
  • Author(s): N. Takagaki, K. Iwano and S. Komori
  • Organizer: 2014 AGU Ocean Sciences Meeting
  • Place of Presentation: Hawaii, USA
  • Year and Date: 2014-02-23 – 2014-02-28
• [Presentation] 風波気液界面を通してのスカラ輸送に及ぼすSchmidt数の影響 (2013)
  • Author(s): 辻本悠太, 高垣直尚, 黒瀬良一, 小森 悟
  • Organizer: 第27回数値流体力学シンポジウム
  • Place of Presentation: 名古屋大学東山キャンパス
  • Year and Date: 2013-12-17 – 2013-12-19
• [Presentation] CORRELATION BETWEEN DRAG COEFFICIENT AND WAVE SLOPE AT EXTREMELY HIGH WIND SPEEDS (2013)
  • Author(s): N. Takagaki, K. Iwano and S. Komori
  • Organizer: AGU Fall Meeting
  • Place of Presentation: San Francisco, CA, USA
  • Year and Date: 2013-12-09 – 2013-12-13
• [Presentation] 風波気液界面を通してのスカラ輸送に及ぼす液側乱流渦とLangmuir circulation の影響 (2013)
  • Author(s): 辻本悠太, 高垣直尚, 黒瀬良一, 小森 悟, 高橋桂子
  • Organizer: 第91期日本機械学会流体工学部門講演会
  • Place of Presentation: 九州大学伊都キャンパス
  • Year and Date: 2013-11-09 – 2013-11-10
• [Presentation] 強風速下における風波気液界面を通しての物質輸送量の評価 (2013)
  • Author(s): 岩野耕治, 高垣直尚, 神内浩行, 西平守志, 黒瀬良一, 小森 悟
  • Organizer: 日本流体力学会年会2013
  • Place of Presentation: 東京農工大学小金井キャンパス
  • Year and Date: 2013-09-12 – 2013-09-14
• [Remarks] 京都大学 環境熱流体工学研究室
  • URL: http://www.fluid.me.kyoto-u.ac.jp/
• [Remarks] 京都大学 工学研究科 機械理工学専攻 環境熱流体工学研究室
  • URL: http://www.fluid.me.kyoto-u.ac.jp/