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Study on Generalized theory for Sediment Transport Process in Unsteady Flow

Research Project

Project/Area Number 02452203
Research Category

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

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

Principal Investigator

NAKAGAWA Hiroji  Kyoto University, Division of Global Environment Engineering, Professor, 工学部, 教授 (60027216)

Co-Investigator(Kenkyū-buntansha) GOTOU Hitoshi  Kyoto Univ., Dept. of Civil Eng., Instructor, 工学部, 助手 (40243068)
KITAMURA Tadanori  Kyoto Univ., Div. of Global Envirn., Eng., Instructor, 工学部, 助手 (00243064)
MURAKAMI Shogo  Kyoto Univ., Div. of Global Envirn., Eng., Instructor, 工学部, 助手 (70166247)
TSUJIMOTO Tetsuro  Kanazawa Univ., Dept of Civil Eng., Assoc. Professor, 工学部, 助教授 (20115885)
NEZU Iehisa  Kyoto Univ., Div. of Global Envirn. Eng., Assoc. Prof., 工学部, 助教授 (30109029)
Project Period (FY) 1990 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥5,900,000 (Direct Cost: ¥5,900,000)
Fiscal Year 1992: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1991: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1990: ¥2,900,000 (Direct Cost: ¥2,900,000)
Keywordsunsteady flow / non-uniform flow / pressure gradient flow / bed-load / suspended load / non equilibrium process / stochastic model / ピックアップレイト / ステップレングス / ムービングペリオド / 非定常開水路流 / 振動流 / ム-ビングペリオド
Research Abstract

The stochastic model quite well describes the temporal and spatial non-equilibrium processes of the sediment transport in both the unsteady and non-uniform flow. This model is consisted of the three subsystems; 1) dislodgement of the particle from the bed characterized by the sediment pick-up rate, 2) the spatial side of the transport characterized by the step length, 3) the temporal side of the transport characterized by the moving period. The hydraulic experiments shows the applicability of the proposed model and the details of the phenomena.
The three subsystems are related to the hydraulic parameters based upon both the dynamics and the probabilistic properties of themselves, and the respective relations are approximately expressed by the appropriate equations. Their applicabilities are shown by the devised experiments.
The turbulent structure of the unsteady open channel flow is experimentally investigated. In order to examine the change of the flow according to that of the unsteadiness systematically, the unsteady parameter is defined which is constituent of both the properties of base flow and the temporal change of the water depth. By using the proposed parameter, the 1-dimensional hydraulic quantities and temporal change of the flow structure are systematically described.

Report

(4 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • 1990 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] Hiroji Nakagawa: "Stochastic simulation of bed-load transport under oscilation-current coex thing flow" Proc.6th International Symposium on Stochastic Hydraulics. 197-204 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 中川 博次: "流砂の時間軸上の非平衡性を考慮した漂砂量式" 海岸工学論文集. 39. 311-315 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 禰津 家久: "非定常開水路流れの乱流構造" 乱流シンポジウム講演論文庫. 24. 144-148 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 後藤 仁志: "PSI-セルモデルによるSaltation層の解析" 海岸工学論文集. 39. 266-270 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Tetsuro Tsujimoto: "Turbulent flow over bed coverd by rigid vegetation" Journal of Hydroscience and Hydraulic Engineering. 10. 13-25 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hiroji Nakagawa: "Stochastic simulation of bed-load transport under oscillation-current coexisting flow" Proc. of 6th Int. Symp. on Stochastic Hydraulics. 197-204 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hiroji Nakagawa: "Non-equilibrium sediment transport along a temporal axis" Proc. of Japanese Coastal Engineering Conference. Vol.39. 311-315 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Iehisa Nezu: "Turbulent structure in unsteady open channel flow" Proc. of Turbulence Symp.Vol.24. 144-148 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hitoshi Goto: "Analysis of saltation layer based on PSI-cell model" Proc. of Japanese Coastal Engineering Conference. Vol.39. 266-270 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Tetsuro Tsujimoto: "Turbulent flow over bed covered by rigid vegetation" Jour. of Hydroscience and Hydraulic Engineering. Vol.10. 13-25 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hiroji Nakagawa: "Stochastic simulation of bed-load transport under oscillation-current coexisting flow" Proc.6th International Symposium on Stochastic Hydraulics. 197-204 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 中川 博次: "流砂の時間軸上の非平衡性を考慮した漂砂量式" 海岸工学論文集. 39. 311-315 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 禰津 家久: "非定常開水路流れの乱流構造" 乱流シンポジウム講演論文集. 24. 144-148 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 後藤 仁志: "PSI-セルモデルによるSaltation層の解析" 海岸工学論文集. 39. 266-270 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Tetsuro Tsujimoto: "Turbulent flow over bed covered by rigid vegetation" Journal of Hydroscience and Hydraulic Engineering. 10. 13-25 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 辻本 哲郎: "時間軸に展開された非平衡流砂過程のモデル化" 土木学会論文集. 443. 37-46 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Iehisa Nezu: "Turbulent Structures over Dunes and Its Role on Suspended Sediments in Steady and Unsteady OpenーChannel Flows" Proc.of Iut.Symp.on Transport of Suspended Sediments and Its Mathematical Modelling. 165-190 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 中川 博次: "非定常性を考慮した砂粒子の離脱過程のモデル化" 水工学論文集. 第35巻. 429-434 (1991)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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