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Reinvestigation of Sediment Transport Mechanism due to Wave Action from the Viewpoint of Fluid Mechanics

Research Project

Project/Area Number 01460180
Research Category

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

Allocation TypeSingle-year Grants
Research Field Hydraulic engineering
Research InstitutionSaitama University

Principal Investigator

HORIKAWA Kiyoshi  Saitama University, Department of Foundation Engineering, Professor, 工学部, 教授 (10010571)

Co-Investigator(Kenkyū-buntansha) NAKAMURA Hiroaki  Saitama University, Department of Foundation Engineering, Research Associate, 工学部, 助手 (20008832)
ASAEDA Takashi  Saitama University, Department of Foundation Engineering, Associate Professor, 工学部, 助教授 (40134332)
IKEDA Syunsuke  Tokyo Institute of Technology, Department of Civil Engineering, Professor, 工学部, 教授 (60016590)
Project Period (FY) 1989 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 1991: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1990: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1989: ¥3,800,000 (Direct Cost: ¥3,800,000)
KeywordsOscillatory Boundary Layer Flow / Sand Ripples / Organized Vortex / Vorticity / Vortex Formation / Vortex Disappearance / 2-D LDV / Turbulence Intensity / 渦の消減 / 砂れん / 乱れの強さ / Reynolds応力 / 渦の規模 / 剥離 / LDV / 底質移動量 / 水の波 / 振動流 / 非定常境界層流れ / 土砂の移動限界 / 浮遊砂 / シ-ト・フロ- / 低反射不規則波造波装置
Research Abstract

The aim of the present research project is (1) to review carefully a great number of research papprs presented so far in relation to sediment transport mechanism due to wave action, and (2) to carry out a series of laboratory investigation on oscillatory boundary flow over ripple models. The basic concept of this research project is reexamine the mechanism of sediment motion induced by time-dependent fluid motion through the view of fluid dynamics. In order to clarify the interaction of the fluid motion and the sediment particle motion, two types of fixed ripple models are installed separately inside an oscilla. tory flume, the size of which are nearly similar to sand ripples generated along the sea bottom by wave action. The first type has a sharpe crested form and the second a round crested form. The former has a some what different shape from the natural sand ripple, but has an advantage to simplify the flow pattern. A 2-D laser Doppler velocimeter (LDV) is effectively used to measure the flow characteristics of mean velocity, fluctuation of velocity components, turbulence intensity, Reynolds stress, and. kinematic eddy viscosity. These terms are diagrammatically shown on a raph for each phase of oscillation, through which formation and disappearance vortices can be visualized. By bomparing these data for sharpe and round crested models, it is clearly shown that the intensity of vortex formed behind a sharp crest is much stronger than that of vortex behind a round crest. In order to look at the temporal and spatial variation of vortex distribution with phase, the measured velocity records are used to calculate the vorticity at each grid point. By using the above data, the development and dissipation process of overall vortex intensity are quantitatively studied.

Report

(4 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • 1989 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] Horikawa,Kiyoshi Ikeda,Shunsuke: "Characteristic of Oscillatory Flow over Ripple Models" Proceedings,Twenty-Second Coastal Engineering Conference,ASCE.1. 661-674 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Ikeda,Shunsuke Horikawa,Kiyoshi Nakamura,Hiroaki Noguchi,Kenji: "Oscillatory Boundary Layer over a Sand Ripple Model" Coastal Engineering in Japan,JSCE.34. 15-29 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 中村 廣昭,山本 吉道,杉山 佳弘: "砕波後の波の変形に関する実験的研究" 土木学会第46回年次学術講演会概要集. 2. 950-951 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 水谷 将,堀川 清司,中村 廣昭: "砂れん周辺の振動流境界層と渦の挙動に関する実験的研究" 土木学会第46回年次学術講演会概要集. 2. 1000-1001 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 堀川 清司: "新編 海岸工学" 東京大学出版会, 384 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Horikawa, K. and Ikeda, S.: "Characteristic of Oscillatory Flow over Ripple Models." Proceedings, Twenty-Second coastal Engineering Conference, ASCE. 1. 661-674 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Ikeda, S., Horikawa, K., Nakamura, H., and Noguchi, K.: "Oscillatory Boundary Layer over a Sand Ripple Model." Coastal Engineering in Japan, JSCE. 34. 15-29 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nakamura, H., Yamamoto, Y., and Sugiyama, Y.: "Laboratory Investigation on Wave Transformation after Wave Breaking (in Japanese)." Abstract, JSCE 46th Annual Convention. 2. 950-951 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Mizutani, S., Horikawa, K., and Nakamura, H.: "Laboratory Investigation on Oscillatory Boundary Layer Flow and Vortex Behavior in the Vicinity of Sand Ripple Models (in Japanese)." Abstract, JSCE 46th Annual Convention. 2. 1000-1001 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Horikawa, K.: University of Tokyo Press. Coastal Engineering, New Edition (in Japanese)., 384 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Horikawa,Kiyoshi;Ikeda,Shunsuke: "Characteristic of Oscillatory Flow over Ripple Models" Proceedings,TwentyーSecond Coastal Engineering Conference,ASCE.1. 661-674 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Ikeda,Shunsuke;Horikawa,Kiyoshi;Nakamura,Hiroaki;Noguchi,Kenji;: "Oscillatory Boundary Layer over a Sand Ripple Model" Coastal Engineering in Japan,JSCE.34. 15-29 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 中村 廣昭,山本 吉道,杉山 佳弘: "砕波後の波の変形に関する実験的研究" 土木学会第46回年次学術講演会概要集. 2. 950-951 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 水谷 将,堀川 清司,中村 廣昭: "砂れん周辺の振動流境界層と渦の挙動に関する実験的研究" 土木学会第46回年次学術講演会概要集. 2. 1000-1001 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 堀川 清司: "新編 海岸工学" 東京大学出版会, 384 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Horikawa Kiyoshi,Ikeda Shunsuke: "Characteristic of Oscillatory Flow over Ripple Models" 22nd International Conference on Coastal Engineering Abstract. 493-494 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 池田 駿介・堀川 清司・中村 廣昭・野口 賢二: "砂漣モデル上の振動流境界層の時空間構造に関する実験的研究" 土木学会論文集. 423/IIー14. 161-170 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Kraus,N.C. Horikawa,Kiyoshi: ""Nearshore Sediment Transport" in The Sea,Ocean Engineering Science,ed.by B.Le Me^^′haute^^′ and D.M.Hanes" John Wiley & Sons,Inc., 775-813 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 池田駿介: "二次元レ-ザ-流速計による砂連モデル上の流れの測定" 海岸工学論文集. 36. 16-20 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Ikeda,Syunsuke: "Fall velocity of single spheres in vertically oscillating fluids" Fluid Dynamics Research. 5. 203-216 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Horikawa,Kiyoshi: "Characteristics of oscillatory flow over ripple models" Proc.22nd intern.Conf.on Coastal Engng.(1990)

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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