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1992 Fiscal Year Final Research Report Summary

Turbulence Behavior below an Gas-Liquid Interface and Effects of Interfacial Waves in a Horizontal Stratified Flow.

Research Project

Project/Area Number 03452127
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Thermal engineering
Research InstitutionThe University of Tokyo

Principal Investigator

SAITO Takamoto  Univ. of Tokyo, Faculty of Engineering, Professor, 工学部, 教授 (40010681)

Co-Investigator(Kenkyū-buntansha) HIHARA Eiji  Univ. of Tokyo, Faculty of Engineering, Associate Professor, 工学部, 助教授 (00156613)
Project Period (FY) 1991 – 1992
KeywordsGas-Liquid Two-Phase Flow / Stratified Flow / k-epsilon Model / Turbulence Model / Interfacial Waves / Condensation / Surface Renewal Model
Research Abstract

Momentum transfer across an air-water interface was studied in a horizontal stratified flow through experimental and numerical analysis. When the liquid Reynolds number equaled to 1200, the smooth interface behaved similar to a solid wall, while the wavy interface behaved different from a solid wall. When the Reynolds number was 11500, turbulence near the interface was completely different from the wall turbulence. In numerical analysis, the k-epsilon model was modified to satisfy asymptotic behavior of turbulent energy, dissipation rate and Reynolds stress to the interface. The modified k-epsilon model could quantitatively predict the turbulence behavior below the smooth interface.
Heat transfer by direct contact condensation at a steam-subcooled water interface was investigated in a horizontal rectangular channel. Three types of models were used to predict the heat transfer coefficients at the interface. The heat conduction model provided the lowest limit of heat transfer. The modified K-epsilon model, which could simulate the near-interface variation of the turbulence quantities, showed the more improved prediction compared with the wall k-epsilon model and agrees with the experimental results with smooth interfaces. The condensation heat transfer with interfacial waves were predicted qualitatively by introducing the interfacial wave effect into the surface renewal model.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 村田 章: "水平管内気液層状流における界面近傍の乱流について" 日本機械学会論文集B編. 57. 1265-1272 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 村田 章: "水平管内気液層状流の凝縮熱伝達" 日本機械学会論文集B編. 57. 1385-1389 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 村田 章: "レイノルズ数及び界面剪断力の方向が界面近傍の乱流に及ぼす影響について" 日本機械学会論文集B編. 57. 2937-2942 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Murata: "Turbulent Behavior below an Air-Water Interface Affected by Wall Bursting,Interfacial Shear Stress,and Interfacial Waves" JSME Int.J.,Ser.II,. 34. 439-446 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Murata: "Heat Transfer by Condensation at a Steam-Water Interface in a Horizontal Channel" Heat Transfer Japanese Research. 20. 793-804 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Murata: "Prediction of Heat Transfer by Direct Contact Condensation at a Steam-Subcooled Water Interface" Int.J.Heat Mass Transfer. 35. 101-109 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Murata: "Turbulence near the Air-Water Interface of Stratified Flow in a Horizontal Channel" Trans. JSME. 57B-536. 1265-1272 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Murata: "Heat Transfer with Condensation at a Steam-Water Interface in a Horizontal Channel" Trans. JSME. 57B-536. 1385-1389 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Murata: "The Effect of Reynolds Numbers and the Direction of Interfacial Shear Stress on Turbulence below an Air-Water Interface" Trans. JSME. 57B-541. 2937-2942 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Murata: "Turbulent Behavior below an Air-Water Interface Affected by Wall Bursting, Interfacial Shear Stress, and Interfacial Waves" JSME Int. J., Ser.II,34-4. 439-446 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Murata: "Heat Transfer by Condensation at a Steam-Water Interface in a Horizontal Channel" Heat Transfer Japanese Research. 20-8. 793-804 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A.Murata: "Prediction of Heat Transfer by Direct Contact Condensation at a Steam-Subcooled Water Interface" Int. J. Heat Mass Transfer. 35-1. 101-109 (1992)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1994-03-24  

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