• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2012 Fiscal Year Final Research Report

Turbulent Flow Structure and Flow Resistance of Hyper-concentratedSediment Laden Flow with Artificial Roughness

Research Project

  • PDF
Project/Area Number 22560519
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Hydraulic engineering
Research InstitutionKumamoto University

Principal Investigator

OHMOTO Terunori  熊本大学, 大学院・自然科学研究科, 教授 (30150494)

Project Period (FY) 2010 – 2012
Keywords乱流 / 抵抗則 / 高濃度土砂流
Research Abstract

Effects of regularly arrayed square roughness on flow resistanceand turbulent characteristics in an open channel have been investigated over a completelyrough-bed with uniform stainless square ribs. Detailed spatial measurements of streamwiseand vertical velocity fluctuations were conducted using Particle Image Velocimetry (PIV)in a vertical plane along the completely rough bed surface. Experimental results indicatedthat flow resistance with three-dimensional square roughness is higher than that withtwo-dimensional square roughness, the maximum value of flow resistance appeared intransverse spacingδ/k (transverse spacing/roughness height ratio)=1 and significantdegrees of spatially regular variation in the time-averaged velocities were generatedalong the rough elements.Mud flows, debris flows or slurries, made up of a large amountof clay and/or silt particles suspended in water, often show non-Newtonian propertiesbut remain poorly understood concerning the impacts of their rheological properties onfully developed turbulent structure. In this study, we experimentally investigatedresistance and momentum transport of hyper- concentrated sediment laden-flow in an openchannel with two-dimensional square ribs by using Particle Image Velocimetry(PIV). Theresults showed that rheological properties significantly dissipated the turbulent flowfluctuations over the dune bed and augmented the flow resistance by comparison with theclear water flow

  • Research Products

    (18 results)

All 2013 2012 2011 2010 Other

All Journal Article (18 results)

  • [Journal Article] Flow Resistance andnon-Newtonian characteristics ofhyperconcentrated sediment laden flow inan open channel2013

    • Author(s)
      Liany Hendratta and TerunoriOHMOTO
    • Journal Title

      Published in Proceedingpaper: 12th International Symposium onRiver Sedimentation 2013

  • [Journal Article] 角柱粗度を有する開水路粗面乱流における抵抗則と運動量輸送2013

    • Author(s)
      大本照憲、Sukarno Tohirin、LianyHendratta
    • Journal Title

      土木学会論文集 B1(水工学)

      Volume: Vol.68, No.4 Pages: I_901--I_906

  • [Journal Article] Non-Newtonian properties and flowstructure in hyperconcentrated sedimentladen flow2012

    • Author(s)
      Liany Hendratta and Terunori OHMOTO
    • Journal Title

      Published in Annals -International Journal of Engineering

      Pages: 57-62

  • [Journal Article] THREE- DIMENSIONALTURBULENT STRUCTURE IN OPEN CHANNEL WITHSIDE-OVERFLOW2012

    • Author(s)
      Terunori Ohmoto, Naoki Yamashita andTakayuki Tanaka
    • Journal Title

      Proceedings of the 10thIntl. Conf.on Hydroscience & Engineering

      Volume: No.39304363 Pages: 4-7

  • [Journal Article] Habitat Conditions on VallisneriaHigoensis as Endangered Species2012

    • Author(s)
      Takayuki Tanaka, Terunori Ohmoto
    • Journal Title

      CD-ROM Proceedings of the 9thInternational Symposium onEcohydraulics (ISE 2012)

      Pages: No.ID15494

  • [Journal Article] 単一水制および連続水制の剥離域下流における流れ構造に関する研究2012

    • Author(s)
      平川隆一・渡邊訓甫・松本祥平・大本照憲
    • Journal Title

      土木学会論文集 A2(応用力学)

      Volume: Vol. 68, No. 2 Pages: I_565- I_572

  • [Journal Article] 透過性および不透過性の側岸凹部流れにおける抵抗特性と流動機構2012

    • Author(s)
      田中貴幸・大本照憲
    • Journal Title

      土木学会論文集B1(水工学)

      Volume: Vol.68,No.4 Pages: I_805-I_810

  • [Journal Article] 連続水制周辺の河床変動と流れ構造に及ぼす相対水深の影響2011

    • Author(s)
      平川隆一,渡邊訓甫,大本照憲,松本祥平
    • Journal Title

      土木学会論文集A2( 応用力学)

      Volume: Vol. 67, No. 2 Pages: I_565-I_572

  • [Journal Article] Flow Resistance and Momentum Transport in Open Channel with Longitudinaly Discontinuous Vegetation2011

    • Author(s)
      T. Tanaka , T. Ohmoto
    • Journal Title

      34th IAHR World Congress: Balance and Uncertainty: Water in a Changing World

      Pages: 2947-2953

  • [Journal Article] ON RHEOLOGY OF HYPER-CONCENTRATED SEDIMENT LADEN FLOW OVER DUNE TYPE BED IN OPEN CHANNEL2011

    • Author(s)
      Terunori Ohmoto and Liany Hendratta
    • Journal Title

      34th IAHR World Congress: Balance and Uncertainty: Water in a Changing World

      Pages: 3690-3697

  • [Journal Article] EFFECTS OF REGULALY ARRAYED ROUGHNESS ON FLOW RESISTANCE AND TURBULENT FLOW STRUCTURE IN AN OPEN HANNEL2011

    • Author(s)
      T. Ohmoto and T.Sukarno
    • Journal Title

      34th IAHR World Congress: Balance and Uncertainty: Water in a Changing World

      Pages: 2915-2922

  • [Journal Article] 横越流を伴う開水路流れの三次元乱流構造2011

    • Author(s)
      大本照憲・田中貴幸・山下直樹
    • Journal Title

      水工学論文集

      Volume: 第55巻 Pages: 913-918

  • [Journal Article] Effects of Hydraulic Factors on Biomass Along Biofilm Formation in Gravel Bed River2010

    • Author(s)
      Terunori Ohmoto, Takayuki Tanaka
    • Journal Title

      Proceeding of 8th International Symposium on Ecohydraulics 2010

      Pages: 2356-2362

  • [Journal Article]2010

    • Author(s)
      Terunori Ohmoto, Ryuichi Hirakawa, Seiichi Sawada, Kunitoshi Watanabe
    • Journal Title

      Flow Pattern and Sediment Transport in the Tidal Estuary Proceeding of 8th International Symposium on Ecohydraulics 2010

      Pages: 256-262

  • [Journal Article] Shallow turbulent flow over regularly arrayed sphere roughness in an open channel, Proceedings of the 6th International Symposium on Environmental Hydraulics, Athens, Greece2010

    • Author(s)
      T. Ohmoto & T. Sukarno
    • Journal Title

      Environmental Hydraulic

      Volume: Vol.1 Pages: 99-104

  • [Journal Article] Flow pattern and sediment transport in the Kikuchi River mouth, Proceedings of the 6th International Symposium on Environmental Hydraulics, Athens, Greece2010

    • Author(s)
      T. Ohmoto R. Hirakawa & K. Watanabe
    • Journal Title

      Environmental Hydraulics

      Volume: Vol.2 Pages: 905-910

  • [Journal Article] Turbulent characteristics of shallow flow over rough surface with regularly arrayed spheres

    • Author(s)
      Terunori Ohmoto and Tohirin Sukarno
    • Journal Title

      Proceedings of 3rd International Symposium on Shallow Flows

      Volume: CD-ROM Pages: Paper No.4

  • [Journal Article] Non-Newtonian properties and flow structure in hyperconcentrated sediment laden flow

    • Author(s)
      Terunori Ohmoto and Liany Hendratta
    • Journal Title

      Proceedings of 3rd International Symposium on Shallow Flows

      Volume: CD-ROM Pages: Paper No.3

URL: 

Published: 2014-08-29  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi