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

2015 Fiscal Year Final Research Report

• 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)
• 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
• 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.

Free Research Field

流体工学