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Application of Higher Order Turbulence Model to Densimetric Stratified Flows

Research Project

Project/Area Number 07650599
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 水工水理学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

HOSODA Takashi  KYOTO UNIVERSITY,Civil Eng., Associate Prof., 工学研究科, 助教授 (10165558)

Co-Investigator(Kenkyū-buntansha) NAGATA Nobuhisa  KYOTO UNIVERSITY,Civil Eng., Research Assoc., 工学研究科, 助手 (50273462)
KIMURA Ichiro  Yokkaichi Univ., Civil Eng., Lecturer, 環境情報工学科, 講師 (60225026)
INOUE Kazuya  KYOTO UNIVERSITY,DPRI,Prof., 防災研究所, 教授 (50026126)
MURAMOTO Yoshio  KYOTO UNIVERSITY,Civil Eng., Prof., 工学研究科, 教授 (50027223)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1996: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1995: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsTurbulence Model / Stratified Flow / Numerical Analysis / Non-linear k-epsilon model / k-εモデル / 密度流 / 内部波 / 乱流
Research Abstract

It is well known that a few kinds of internal waves, which are generated by the hydrodynzmic instability of shear layr, can be seen in densimetric exchange flows. The mixing process due to these internal waves as well as the propagation process of a density front was firstly reproduced numerically by means of the NS equation.
It was pointed out through the considerations of the numerical results that the typical patterns with both the Kelvin Helmholtz and Holmboe instability waves can be simulated by using the numerical model, though the turbulence model should be introduced to reproduced the characteristics of internal waves such as the wave amplitude and the mixing layr, precisely.
Then, the non-linear k-epsilon model was applied to the densimetric exchange flows as the higher order turbulence model. It was shown that the internal waves generated by the shear instability can not be reproduced by using the standard k-epsilon model and the non-linear k-epsilon model including the effect of the strain parameter is applicable to the internal waves. The model performances of the non-linear k-epsilon model for a various turbulent flows with the vortices ware also investigated, indicating the applicability of the model to a various flows.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 細田 尚: "水平渦と2次流を考慮した複断面開水路流れ" 土木学会水工学論文集. 42. 631-636 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Hosoda: "Vortex formation processes in open channel flows" Proc.11th Symp.on Turbulent Shear Flows. Vol.2. 19‐1-19‐6 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hosoda, T., Nishizawa, K., Fukusumi, A., Okubo, K.and M., Muramoto, Y.: "Numerical studies on internal waves induced in a densimetric exchange flows" Annual Journal of Hydraulic Eng., JSCE. Vol.40. 525-530 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hosoda, T., Kimura, I.and Muramoto, Y.: "Vortex formation processes in open channel flows with a side discharge" Proc.1st JSPS-NUS Seminar on Integrated Engineering. 11-19 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hosoda, T., Kimura, I.and Muramoto, Y.: "Vortex formation processes in open channel flows with a side discharge by using the non-linear k-epsilon model" Proc.11th Symposium on Turbulent Shear Flows, Grenoble, Frenoble, France. Vol.2. 19-1-19-6 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hosoda, T., Sakurai, T.and Muramoto, Y.: "3-D computation of unsteady flows in compound open channels with horizontal vortices and secondary currents" Annual Journal of Hydraulic Eng., JSCE (in Japanese). Vol.42. 631-636 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Morikawa, H., Okubo, K,and Muramoto, Y.: "Intrusion of turbid water in statified lakes driven by resuspension of sediments on sloping boundaries" Annual Journal of Hydraulic Eng., JSCE. Vol.40. 607-612 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 木村一郎: "開水路横流入部における渦運動の数値シミュレーション" 水工学論文集. 41. 717-722 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Hosoda,T.: "Vorter formation processes in Open channel flows with a side diehayo" Proc.1st JSPS-NUS Seminar on Integrated Eng.11-19 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 福住 晃: "k-εモデルを用いた交換密度流の数値解析的研究" 平成8年度関西支部年次学術講演会講演概要. II-61-1-II-61-2 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 細田尚: "交換密度流に生じる内部波に関する数値解析的研究" 水工学論文集(土木学会). 40(印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 細田尚: "k-εモデルを開いた交換密度流の数値解析的研究" 平成8年土木学会関西支部年次学術講演概要. (印刷中). (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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