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2006 Fiscal Year Final Research Report Summary

Scalar Transfer Mechanisms at the Sheared Air-Water Interface : Estimation of Scalar Transfer Rate

Research Project

Project/Area Number 14102016
Research Category

Grant-in-Aid for Scientific Research (S)

Allocation TypeSingle-year Grants
Research Field Fluid engineering
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

KOMORI Satoru  Kyoto Univ., Dept.of Mechanical Engineering and Science, Professor, 工学研究科, 教授 (60127082)

Co-Investigator(Kenkyū-buntansha) NAGATA Kouji  Nagoya Univ., Dept.of Mech.Engineering and Science, Associate Professor, 工学研究科, 助教授 (50274501)
KUROSE Ryoichi  KYOTO UNIVERSITY, Dept.of Mechanical Engineering and Science, Associate Professor, 工学研究科, 助教授 (70371622)
MATSUMOTO Mitsuhiro  KYOTO UNIVERSITY, Dept.of Mechanical Engineering and Science, Associate Professor, 工学研究科, 助教授 (10229578)
ITO Yasumasa  KYOTO UNIVERSITY, Dept.of Mechanical Engineering and Science, Research Associate, 工学研究科, 助手 (40346078)
SUZUKI Naoya  KYOTO UNIVERSITY, Dept.of Mechanical Engineering and Science, Postdoctoral researcher, 工学研究科, 研究員 (40422985)
Project Period (FY) 2002 – 2006
KeywordsEnvironmental Fluid Dynamics / Turbulence / Multi-Phase Flow / Reacting flow / Computational Fluid Dynamics
Research Abstract

It is of great importance to investigate scalar (heat and mass) transfer mechanism across the air-sea interface in order to improve the reliability of predictions for global warming. However, previous sub-models used in a general circulation model for predicting heat and mass transfer velocities across the air-sea interface have been based on the simple assumption that the transfer velocities are proportional to wind velocity over the ocean surface. This rough assumption reduces the reliability of the sub-models. The aim of this study is, therefore, to clarify the scalar transfer mechanism across the sheared air-water interface from the fluid-mechanical point of view and to develop reliable models for the scalar transfer velocity that truly reflects the physical processes involved.
The effects of wind speed, fetch, swell, surface contamination, thermal stratification, entrained bubbles, dispersing droplets and rainfall on the mass transfer across the air-water interface have been invest … More igated by carrying out both laboratory experiments and numerical simulation. The results show that the mass transfer velocity k_L, is not simply proportional to the wind speed and it has a kink in the middle wind speed region. The mass transfer velocity is well correlated with the frequency of the appearance of the surface-renewal eddies, since the mass transfer across the sheared air-water interface is controlled by the surface-renewal eddies. The effect of fetch on k_L is compensated when the free-stream wind speed is used as a wind parameter. Both swell and surface contaminants reduce the mass transfer but the thermal stratification in the water flow does not affect the mass transfer because of strong wind-driven turbulence. The entrained bubbles due to intense wave breaking in the high wind speed region significantly promote the mass transfer but the effect of dispersing droplets is negligibly small. The rainfall enhances the mass transfer across the air-water interface and the promotion effect is well described by the momentum flux of rainfall. The details of the results should be refereed to our published articles. Less

  • Research Products

    (37 results)

All 2007 2006 2005 2004 2003 2002

All Journal Article (35 results) Book (2 results)

  • [Journal Article] Effects of rainfall on mass transfer across the air-water interface2007

    • Author(s)
      N.Takagaki, S.Komori
    • Journal Title

      Journal of Geophysical Research (in press)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Drag and lift forces acting on a spherical water droplet in homogeneous linear shear air flow2007

    • Author(s)
      K.Sugioka, S.Komori
    • Journal Title

      Journal of Fluid Mechanics 570

      Pages: 155-175

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Drag and lift forces acting on a spherical water droplet in homogeneous linear shear air flow2007

    • Author(s)
      K.Sugioka, S.Komori
    • Journal Title

      journal of Fluid Mechanics Vol. 570

      Pages: 155-175

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] The Effects of Raindrops on Interfacial Turbulence and Air-Water Gas Transfer2007

    • Author(s)
      S.Komori, N.Takagaki, R.Saiki, N.Suzuki, K.Tanno
    • Journal Title

      Transport at the Air Sea Interface (eds.C.Garbe et al.) (Springer Verlag)

      Pages: 167-177

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Air-water flux reconciliation between the atmospheric CO_2 profile and mass balance techniques2007

    • Author(s)
      W.R.McGillis, J.W.H.Dacey, J.D.Ware, D.T.Ho, J.T.Bentl, W.E.Asher, C.J.Zappal, P.A.Raymond, R.Wanninkhof, S.Komori
    • Journal Title

      Transport at the Air-Sea Interface (eds.C.Garbe et al.) (Springer Verlag)

      Pages: 179-190

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] New sea spray generation function for spume droplets2006

    • Author(s)
      D.Zhao, Y.Toba, K.Sugioka, S.Komori
    • Journal Title

      Journal of Geophysical Research 111

      Pages: C02007

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Similarity and dissimilarity in air-sea momentum and C02 transfers : the nondimensional transfer coefficients in light of the windsea Reynolds number2006

    • Author(s)
      Y.Toba, S.Komori, Y.Suzuki, D.Zhao
    • Journal Title

      Atmosphere-Ocean Interactions 1・2

      Pages: 53-75

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Local variation of frost layer thickness and morphology2006

    • Author(s)
      K.Qu, S.Komori, Y.Jiang
    • Journal Title

      International Journal of Thermal Seiences 45

      Pages: 116-123

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Thermally stratified liquid turbulence with a chemical reaction2006

    • Author(s)
      R.Onishi, S.Komori
    • Journal Title

      AIChE Journal 52・2

      Pages: 456-468

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] New sea spray generation function for spume droplets2006

    • Author(s)
      D.Zhao, Y.Toba, K.Sugioka, S.Komori
    • Journal Title

      Journal of Geophysical Research Vol.111

      Pages: c02007

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Similarity and dissimilarity in air-sea momentum and CO2 transfers : the nondimensional transfer coefficients in light of the windsea Reynolds number2006

    • Author(s)
      Y.Toba, S.Komori, Y.Suzuki, D.Zhao
    • Journal Title

      Atmosphere-Ocean Interactions(WIT Press) Vol.2

      Pages: 53-75

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Local variation of frost layer thickness and morphology2006

    • Author(s)
      K.Qu, S.Komori, Y.Jiang
    • Journal Title

      International Journal of Thermal Sciences Vol.45

      Pages: 116-123

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Thermally stratified liquid turbulence with a chemical reaction2006

    • Author(s)
      R.Onishi, S.Komori
    • Journal Title

      AIChE Journal. Vol.52 No.2

      Pages: 456-468

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Direct numerical simulation of particle-laden mixing layer with a chemical reaction2005

    • Author(s)
      T.Michioka, R.Kurose, K.Sada, H.Makino
    • Journal Title

      International Journal of Multiphase Flow 31

      Pages: 843-866

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Combustion mechanism of liquid fuel spray in gaseous flame2005

    • Author(s)
      M.Nakamura, F.Akamatsu, R.Kurose, M.Katsuki
    • Journal Title

      Physics of Fluids 17

      Pages: 123301-1-14

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Direct numerical simulation of particle-laden mixing layer with a chemical reaction2005

    • Author(s)
      T.Michioka, R.Kurose, K.Sada, H.Makino
    • Journal Title

      International Journal of Multiphase Flow Vol.31

      Pages: 843-866

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Combustion mechanism of liquid fuel spray in gaseous flame2005

    • Author(s)
      M.Nakamura, F.Akamatsu, R.Kurose, M.Katsuki
    • Journal Title

      Physics of Fluids Vol.17

      Pages: 123301-1-14

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Large-eddy simulation of a turbulent reacting liquid flow2004

    • Author(s)
      T.Michioka, S.Komori
    • Journal Title

      AIChE Journal 50・11

      Pages: 2705-2720

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Pulverized coal combustion characteristics of high fuel ratio coals2004

    • Author(s)
      R.Kurose, M.Ikeda, H.Makino, M.Kimoto, T.Miyazaki
    • Journal Title

      Fuel 83

      Pages: 1177-1785

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Large-eddy simulation of a turbulent reacting liquid flow2004

    • Author(s)
      T.Michioka, S Komori
    • Journal Title

      AIChE Journal Vol. 50 No. 11

      Pages: 2705-2720

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Pulverized coal combustion characteristics of high fuel ratio coals2004

    • Author(s)
      R.Kurose, M.Ikeda, H.Makino, M.Kimoto, T.Miyazaki
    • Journal Title

      Fuel Vol.83

      Pages: 1177-1785

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effects of wind waves on air-sea gas exchange : Proposal of an overall C02 transfer velocity formula as a function of breaking-wave parameter2003

    • Author(s)
      D.Zhao, Y.Toba, Y.Suzuki, S.Komori
    • Journal Title

      Tellus B 55・2

      Pages: 478-487

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] A variable-density projection method for interfacial flows2003

    • Author(s)
      M.Ni, M.Abdou, S.Komori
    • Journal Title

      Numerical Heat Transfer, Part B 44

      Pages: 553-574

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Projection methods for the calculation of incompressible unsteady flows2003

    • Author(s)
      M.Ni, S.Komori, N.Morley
    • Journal Title

      Numerical Heat Transfer, Part B 44

      Pages: 533-551

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effects of outflow from surface of sphere on drag, shear lift, and scalar diffusion2003

    • Author(s)
      R.Kurose, H.Makino, S.Komori, M.Nakamura, F.Akamatsu, M.Katsuki
    • Journal Title

      Physics of Fluids 15

      Pages: 2338-2351

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Large-eddy simulation of a solid-fuel jet flame2003

    • Author(s)
      R.Kurose, H.Makino
    • Journal Title

      Combustion and Flame 135

      Pages: 1-16

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effects of wind waves on air-sea gas exchange : Proposal of an overall CO2 transfer velocity formula as a function of breaking-wave parameter2003

    • Author(s)
      D.Zhao, Y.Toba, Y.Suzuki, S.Komori
    • Journal Title

      Tellus B Vol.55 No.2

      Pages: 478-487

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] A variable-density projection method for interfacial flows2003

    • Author(s)
      M.Ni, M.Abdou, S.Komori
    • Journal Title

      Numerical Heat Transfer, Part B Vol.44

      Pages: 553-574

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Projection methods for the calculation of incompressible unsteady flows2003

    • Author(s)
      M.Ni, S.Komori, N.Morley
    • Journal Title

      Numerical Heat Transfer, Part B Vol.44

      Pages: 533-551

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effects of outflow from surface of sphere on drag, shear lift, and scalar diffusion2003

    • Author(s)
      R.Kurose, H.Makino, S.Komori, M.Nakamura, F.Akamatsu, M.Katsuki
    • Journal Title

      Physics of Fluids Vol.15

      Pages: 2338-2351

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Large-eddy simulation of a solid-fuel jet flame2003

    • Author(s)
      R.Kurose, H.Makino
    • Journal Title

      Combustion and Flame Vol.135

      Pages: 1-16

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] The effects of high-frequency ultrasound on turbulent liquid mixing with a rapid chemical reaction2002

    • Author(s)
      Y.Ito, K.Nagata, S.Komori
    • Journal Title

      Physics of Fluids 14・12

      Pages: 4362-4371

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] General second-order projection formulas for unsteady flows2002

    • Author(s)
      M.Ni, S.Komori
    • Journal Title

      AIAA Journal 40・7

      Pages: 1464-1467

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] The effects of high-frequency ultrasound on turbulent liquid mixing with a rapid chemical reaction2002

    • Author(s)
      Y.Ito, K.Nagata, S.Komori
    • Journal Title

      Physics of Fluids Vol.14 No.12

      Pages: 4362-4371

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] General second-order projection formulas for unsteady flows2002

    • Author(s)
      M.Ni, S.Komori
    • Journal Title

      AIAA Journal Vol.40, No.7

      Pages: 1464-1467

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] Transport at the Air-Sea Interface (eds. C. Garbe et al.)2007

    • Author(s)
      W.R.McGillis, J.W.H.Dacey, J.D.Ware, D.T.Ho, J.T.Bentl, W.E.Asher, C.J.Zappal, P.A.Raymond, R.Wanninkhof, S.Komori
    • Total Pages
      179-190
    • Publisher
      Air-water flux reconciliation between the atmospheric CO_2 profile and mass balance techniques
    • Description
      「研究成果報告書概要(和文)」より
  • [Book] Transport at the Air-Sea Interface (eds. C. Garbe et al.)2007

    • Author(s)
      S.Komori, N.Takagaki, R.Saiki, N.Suzuki, K.Tanno
    • Total Pages
      167-177
    • Publisher
      The Effects of Raindrops on Interfacial Turbulence and Air-Water Gas Transfer
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2008-05-27  

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