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The Role of Coherent Structures in Turbulent Flows

Research Project

Project/Area Number 61302061
Research Category

Grant-in-Aid for Co-operative Research (A)

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

Principal Investigator

TAMAI Nobuyuki  Professor, Dept. of Civil Eng., Univ. of Tokyo, 工学部, 教授 (90010818)

Co-Investigator(Kenkyū-buntansha) ASAEDA Takashi  Assoc. Prof., Dept. of Civil Eng., Univ. of Tokyo, 工学部, 助教授 (40134332)
OHASHI Masakazu  Assist. Prof., Dept. of Mathematics, Chuo Univ., 理工学部, 専任講師 (90160598)
OONARI Hirofumi  Assoc. Prof., Dept. of Civil and Architecture Eng., Tokuyama Technical College, 土木建築工学科, 助教授 (30045041)
KOMATSU Toshimitsu  Assoc. Prof., Dept. of Civil and Water Eng., Kyusyu Univ., 工学部, 助教授 (50091343)
NEZU Iehisa  Assoc. Prof. Dept. of Civil Eng., Kyoto Univ., 工学部, 助教授 (30109029)
Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥11,100,000 (Direct Cost: ¥11,100,000)
Fiscal Year 1987: ¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 1986: ¥6,100,000 (Direct Cost: ¥6,100,000)
KeywordsTurbulence / Coherent Structure / Inner Layer / Outer Layer / Separation Bubble / Boil / Free Shear-Layer / 混合層 / 連行
Research Abstract

Coherent sturucture in turbulent flows is a new topic from historical point of view in the research on turbulence. Therefore, the role of coherent structures in hydraulic engineering problems has not been clarified and fully understood yet. A comprehensive study is sought to reach to a unified view and relationships among several problems. The main emphasis is laid on open channel flows and the study consists of two parts. The one is a fundamental part which aims at finding out cherent structures in inner and outer layers in open channel flows. The other is an application part in which the role of coherent vortices in open channel flows and in a shear layer is treated.
With simultaneous application of flow visualization techniques and a laser doppler anemometer, spatial and temporal cherent features of longitudinal vortices in an inner layer of an open channel flow were obtained. One to one correspondence between a time siries of signal of velocity and a transverse pattern of longitudinal vortices was found out. Average duration time in the longitudinal direction was specified. For longitudinal vortices in an outer layer, rotational spectrum was utilized. Near the bottom and the water surface, strong correlation was found in two-point probability density of vertical velocity.
At a downstream facing step, turbulence structures including pressure and the Reynolds stress were measured. Variation of the separation bubble and the merging of separation eddied are two major triggers to produce kolk-boil eddies at the rear of a step. Three-dimensional structure of separation eddies and horse-shoe vortices in fornt of a hemisphere was clarified. Features of a single vortex and its effect on average velocity fild over a favorable slope were clarified.

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (68 results)

All Other

All Publications (68 results)

  • [Publications] 玉井信行,浅枝 隆,田中 規夫: 水理講演会論文集. 31. 371-376 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 玉井 信行,浅枝 隆,田中 規夫: 乱流シンポジウム講演会論文集. 18. 243-247 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 祢津家久,中川博次: 京都大学防災研 年報. 29,B. 647-673 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 祢津家久,中川博次: 土木学会論文集. 369. 89-98 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 祢津家久,中川博次,天野邦彦,藤本和久: 水理講演会文集. 31. 413-418 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu, I.; Rodi, W.: J. of Hydraulic Eng., ASCE. 112. 335-355 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu. I.; Nakagawa, H.: Proc. of Asian Congress of Fluid Mech.3. 146-149 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Tominaga, A.; Nezu, I.: Proc. of Asian Congress of Fluid Mech.3. 608-611 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Komatsu, T.; Kotsubo, H.; Umenaga, S.: Proc. of Cong. Apd-IAHR Seoul. 5. 121-138 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 大成博文 他: 乱流シンポジウム講演会論文集. 18. 238-242 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 大成博文 他: 乱流シンポジウム講演会論文集. 18. 95-101 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 大成博文 他: 流れの可視化シンポジウム報告集. 14. 411-414 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 林泰造,大橋正和,南橋丈二: 乱流シンポジウム講演会論文集. 18. 270-277 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 林泰造,南橋丈二,大橋正和: 中央金学理工学部紀要. 29. 233-254 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Tamai, N.; Asaeda, T.; Tanaka, N.: Boundary-Layer Metesrology. 39. 301-314 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 池田裕一,大迫一也,浅枝隆,玉井信行: 第19回乱流シンポジウム構演会論文集. 210-214 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 中川,祢津,室屋,松本: 流れの可視化. 7. 339-344 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 中川,祢津,光成,川嶌: 第4回流れの計測大阪シンポジウム. 51-58 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 祢津 家久,中川 博次: 土木学会論文集. 387. 125-134 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 祢津,中川,室屋,松本: 土木学会論文集. 387. 153-162 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nakagawa, H.; Nezu, I.: Jour. of Hydraulic Research, IAHR No.1. 25. 67-68 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu, I.; Nakagawa, H.: Memoirs of Faculty Eng., Kyoto University No.2. 49. 111-145 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu, I.; Nakagawa, H.; Amano. K.: 22nd Congress of IAHR, Fluvial Hydraulics (Ed.W.R.White), Lausanne. 219-220 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu, I.; Nakagaws, H.: 6th Symp. on Turbulent Shear Flows, Toulouse, No.19-1. 19-1-1-19-1-6 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Ohashi, M.: 2nd International Symposium on Fluid Control and Measurement,. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 大成博文 他: 第19回乱流シンポジウム講演会論文集. 205-209 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 大成博文 他: 土木学会論文集.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Tamai, N., Asaeda, T. and Tanaka, N.: "Flow structure around a hemisphere on a flat plate" Proc. of the Japanese Conference on Hydraulics. 31. 371-376 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Tamai, N., Asaeda, T. and Tanaka, N.: "Separation vortex in the rear of a hemisphere" Proc. of the Symposium on Turbulence. 18. 243-247 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu, I. and Nakagawa, H.: "Numerical calculation of turbulent open-channel flows in consideration of free-surface effects" Annuals of Disaster Prevention Research Inst., Kyoto Univ.29-B. 649-673 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu, I. and Nakagawa, H.: "Inversigation on three-dimensional turbulent sturcture in uniform open-channeland closed duct flows" Proc. of the Japan Soc. of Civil Engineers. No.369. 89-98 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu, I., Nakagawa, H., Amano, K. and Fujimoto, K.: "Velocity relaxation process of separated step flow and coherent vortex shedding form reattachment in open channel flows" Proc. of the Japanese Conference on Hydraulics. 31. 413-418 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu,I. and Rodi, W.: "Open-channel flow measurements with a laser doppler anemometer{" J. of Hydraulic Eng., Proc. ASCE. 112. 335-355 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu, I. and Nakagawa, H.: "Turbulent structure of backward-facing step flow in an open channel" Proc. of Asian Congress of Fluid Mechanics. 3. 146-149 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Tominaga, A. and Nezu, I.: "Tree-dimensional turbulent structure in a straight open-channel flow with varying boundary roughness" Proc. of Asian Congress of Fluid Mechanics. 3. 608-611 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Komatsu, T., Kotsubo, H. and Umenaga, s.: "Characteristics of large vortical structure in a mixing shear flow and its hydraulic roles" Proc. of the Congress of the Asian and Pacific Regional Div., IAHR. 5. 121-138 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Oonari, H. et al.: "Structure of coherent eddies in an inner layer of open channel flows" Proc. of the Symposium on Turbulence. 18. 238-242 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Oonari, H. et al.: "Simultaneous measurement of velocity by an anemometer with flow visualization in an inner layer of wall turbulence" Proc. of the Symposium on Turbulence. 18. 95-101 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Oonari, H. et al.: "Hierarchy of coherent struction in open-channel turbulent flows" Proc. of the Symposium on Flow Visualization. 14. 411-414 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Hayashi, T., Ohashi, M. and Minamihashi, J.: "On the structure of large-scale eddies formed in turbulent flow over rough boundary" Proc. of the Symposium on Turbulence. 18. 270-277 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Hayashi, T., Minamihashi, J. and Ohashi, M.: "Temporal and spatial structure of large-scale eddies in turbulent flows in andopen-channel" J. of the Faculty of Science and Technology, Chuo University. 29. 233-254 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Tamai, N., Asaeda, T. and Tanaka, N.: "Vortex structures around a hemispheric hump" Boundary-Layer Meteorology. 39. 301-314 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Ikeda, H., Oosako, K., Asaeda, T. and Tamai, N.: "A vertical vortex and boil ober a favorable slope in openchannel flows" Proc. of the Symposium on Turbulence. 19. 210-214 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nakagawa, H., Nezu, I., Muroya, H. and Matsumoto, T.: "Flow visualization of the effect of outside disturbances on two-layered mixinglayers" J. of Flow Visualization. 7. 339-344 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nakagawa, Nezu, Mitsunari and Kawashima: "Three-dimensional features of open-channel flow with longitudinal vortices over float movable bed" Proc. of the Symposium on Flow Visualization, Osaka. 18. 51-58 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu, I. and Nakagawa, H.: "Numerical calculation of turbulent open-channel flows by using a modified - turbulence model" Proc. of the Japan Soc. of Civil Engineers. No.387. 125-134 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu, I., Nakagawa, H., Muroya, H. and Matsumoto, T.: "Turbulent structure and control of coherent vortex in mixing layer of open-channel paralled coflows" Proc. of the Japan Soc. of Civil Engineers. No.387. 153-162 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nakagawa, H. and Nezu, I.: "Experimental inversigation on turbulent structure of backward-facing step flowin open channel" J. of Hydraulic Research, IAHR. 25. 67-88 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu, I. and Nakagawa, H.: "Numerical calculation of turbulent open-channel flows in consideration of free-surface effect" Momoirs of Faculty of Eng., Kyoto Univ., No.2. 49. 111-145 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu, I., Nakagawa, H. and Amano, K.: "Evaluation of shear stress in open-channel step flows" Proc. of the Int. Congress of IAHR. 22. 211-220 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Nezu, I. and Nakagawa, H.: "Turbulent structure of backward-facing step flow and coherent vortex shedding form reattachment in open channel flow" Proc. of the Int. Symp. on Turbulent Shear Flows. 19. 19-1-1 - 19-1-6 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Ohashi, M.: "The fractal structure of large scale vortices in open channel flow" Int. Symp. on Fluid Control and Measurement.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Oonari, H. et al.: "Lagrangian trace of coherent structures in and inner layer of wall turbulence" Porc. of the Symp. on Turbulence. 19. 205-209 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Oonari, H. et al.: "Relationship between coherent structure of large eddies and time series of velocity signal in an inner layer of open-channel flows" Proc. of the Japan. Soc. of Civil Engineers.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 林泰造,大橋正和,南橋丈二: 乱流シンポジウム講演論文集. 18. 270-277 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 林泰造,南橋丈二,大橋正和: 中央大学理工学部紀要. 29. (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 玉井信行,浅枝隆,田中規夫: 水理講演会論文集. 31. 371-376 (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] 玉井信行,浅枝隆,田中規夫: 乱流シンポジウム講演会論文集. 18. 243-247 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 祢津家久,中川博次: 京都大学防災研年報. 29,B. 647-673 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 祢津家久,中川博次: 土木学会論文集. 369. 89-98 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 祢津家久,中川博次,天野邦彦,藤本和久: 水理講演会論文集. 31. 413-418 (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] Nezu,I.;Rodi,W.: J.of Hydraulic Eng.,ASCE. 112. 335-355 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] Nezu,I.;Nakagawa,H.: Proc.of Asian Congress of Fluid Mech.3. 146-149 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] Tominaga,A.;Nezu,I.: Proc.of Asian Congress of Fluid Mech.3. 608-611 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] Komatsu,T.;Kotsubo,H.;Umenaga,S.: Proc.of Cong.APD-IAHR Seoul. 5. 121-138 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 大成博文 他2名: 乱流シンポジウム講演論文集. 18. 238-242 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 大成博文 他2名: 乱流シンポジウム講演会論文集. 18. 95-101 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 大成博文 他2名: 流れの可視化シンポジウム報告集. 14. 411-414 (1986)

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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