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

1993 Fiscal Year Final Research Report Summary

Study on Hysteresis Phenomenon and Local Non-equilibrium Turbulence in Couette-type Turbulent Flow

Research Project

Project/Area Number 03452123
Research Category

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

Allocation TypeSingle-year Grants
Research Field Fluid engineering
Research InstitutionNagoya Institute of Technology

Principal Investigator

NAKABAYASHI Koichi  Nagoya Institute of Technology, Mechanical Engineering, Professor, 工学部, 教授 (90024231)

Co-Investigator(Kenkyū-buntansha) KITOH Osami  Nagoya Institute of Technology, Mechanical Engineering, Professor, 工学部, 教授 (10093022)
KITOH Osami  Nagoya Institute of Technology, Mechanical Engineering, Professor (10093022)
KITOH Osami  Nagoya Institute of Technology, Mechanical Engineering, Professor (10093022)
KITOH Osami  Nagoya Institute of Technology, Mechanical Engineering, Professor (10093022)
KITOH Osami  Nagoya Institute of Technology, Mechanical Engineering, Professor (10093022)
Project Period (FY) 1991 – 1993
KeywordsCouette-type, turbulent flow / Plane turbulent, couette flow / Hysteresis phenomenon / Local non-equilibrium / Local equilibrium / Alternating pressure gradient / Wavy wall turbulence
Research Abstract

1. Firstly, turbulence structure in plane turbulent Couette flow has been studied. The results obtained are as follows. (1) Turbulence structure in the wall region is similar to that in the two-dimensional channel flow. In the core region, however, turbulence structure is very different from the latter case because of the uniform shear existing there. (2) As turbulence energy is produced only on the streamwise turbulence quantity, the anisotropy of turbulence is greater than that of the channel flow. (3) Distributions of velocity fluctuating components show Gaussian and tripple velocity correlation is almost zero. Viscous diffusion and dissipation of turbulence energy balance throughout the core region. Energy transport u, v and w is due to the pressure-strain. (4) Sinuisoidal change of mean velocity distribution has been measured in the spanwise derection, so that large-scale motions having spanwise scale of eddies are conjectured to exist.
2. Secondly, Couette-Poiseuille type turbulen … More t flow has been studied to investigate the hysteresis phenomenon in the core region and the local non-equilibrium turbulence which have been measured on the turbulent Couette-type flow with an alternative pressure gradient, having both stationary wavy and moving flat walls. The distribution of velocity in the Couette-Poiseuille type flow has been considered indepedently under the parameters of Reynolds number Re^<**>=hu_<**>/nu and d tau /dy. The results obtained are as follows. (1) Low of the wall is given by U^+=f(y^+, mu^<-1>), where y^+=u_<**>/nu and mu^<-1>=(nu d tau/dy)/(rhou_<**>^3). We clarified the effects of Re^<**> on Van Driest damping factor A^+ and additive constant B of the log-law for preferable (mu^<-1><0) and adverse (mu^<-1>>0) pressure gradient cases, respectively. (2) For positive value of d tau/dy, effects of betaXIrhou_<**>^2h/(d tau/dy) and Re^<**> on the half-power law is clarified. (3) Profiles of velocity defect law in the turbulent core region are only related to whether the flow is Couette-type (beta>-0.5) or poiseuille-type (beta<-0.5). Less

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 中林功一: "クエット型乱流の特性" 日本機械学会第70期通常総会講演会講演論文集. II. 50-53 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 鬼頭修己: "発達チャネル乱流の乱れ特性に及ぼすレイノルズ数の効果" 日本機械学会論文集(B編). 59-564. 2443-2449 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中林功一: "平行平板間乱流クエット流の大規模構造と乱れ特性" 日本機械学会流体工学部門講演会講演論文集. 35-38 (199)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中林功一: "クエット-ポアズイユ型乱流の速度分布" 日本機械学会第71期通常総会講演会発表予定. (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Koich Nakabayashi: "Characteristics of Couette-type Turbulent Flow" Prepr.oN Jpn.Soc.Mech.Eng.II. 50-53 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Osami Ktoh: "Reynolds Number Effect on Turbulent Characteristics of Fully Developed Turbulent Channel Flow" Trans.Jpn.Soc.Mech.Eng.56-564. 2443-2449 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Koichi Nakabayashi: "Large Scale Structure and Turbulence Characteristics in Plane Turbulent Couette Flow" Prepr.of Jpn.Soc.Mech.Eng.(Fluid Mech.). 35-38 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Koichi Nakabayashi: "Mean Velocity Profiles of Couette-Poiseuille Type Flow" Prepr.of Jpn.Soc.Mech.Eng.(1994)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1995-03-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi