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1998 Fiscal Year Final Research Report Summary

Development and verification of analytical and statistical theory of turbulence

Research Project

Project/Area Number 09440076
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field General mathematics (including Probability theory/Statistical mathematics)
Research InstitutionNagoya University

Principal Investigator

KANEDA Yukio  Graduate School of Engineering, Nagoya University, Prof., 工学研究科, 教授 (10107691)

Co-Investigator(Kenkyū-buntansha) ISHIHARA Takashi  Graduate School of Engineering, Assistant, 工学研究科, 助手 (10262495)
GOTOH Toshiyuki  Nnagoya Institute of Technology, Department of System Engineering, Assoc.Prof., 工学部, 助教授 (70162154)
KOZONO Hideo  Graduate School of Mathematics, Assoc.Prof., 多元数理科学研究科, 助教授 (00195728)
ISHII Katsuya  Graduate School of Engineering, Assoc.Prof., 工学研究科, 助教授 (60134441)
Project Period (FY) 1997 – 1998
KeywordsStatistical theory of turbulence / Turbulent diffusion in stably stratified turbulence / Anomalous diffusion in shear flow turbulence / Lagrangian renormalized approximation (LRA) / Energy spectrum in two-dimensional turbulence / Beta-plane turbulence / Phase shift due to wave-turbulence interaction / Pade approximation for Lagrangian two-time correlation
Research Abstract

The purpose of this study is to develop analytical and statistical theories of turbulence that are practically applicable not only to isotropic, but also to anisotropic turbulence, and to verify them by numerical simulations.
The results of the study include the followings :
(1) An analytical and statistical theory is developed for turbulent diffusion in strongly stratified turbulence. It is based on a linearized approximation (Rapid Distortion Theory) and Corrsin's conjecture, and clarifies an mechanism of suppression of vertical turbulent diffusion by strong stratification. It is also shown that an anomalous turbulent diffusion that could not be explained by existing turbulence models, may occur in turbulence with a mean flow of simple shearing motion. These theoretical results were confirmed by numerical simulations.
(2) By applying the Lagrangian Renormalized Approximation (LRA) , it is shown that a new kind of energy spectrum in two-dimensional turbulence may exist, which is not explained by the theory of Kraichnan-Batchelor-Leith (KBL) , but still exhibits the k^3 spectrum as predicted by KBL.By constructing a Lagrangian statistical theory for the beta-plane turbulence, which is a well known model for the fluid motion on a rotating sphere such as a planet, an analysis is made of the phase shift due to the interaction between waves and turbulence. The theoretical results were shown to be in good agreement with direct numerical simulations (DNS).
(3) A new computational method is proposed for efficiently estimating Lagrangian two-time correlations that play the key roles in the study of mass and heat transfer in turbulence. The method uses Taylor expansions in powers of time and corresponding Pade approximations. It is shown thet the method works well and its results are in good agreement with DNS, not only for single but also two-particle correlation, and not only for isotropic but also anisotropic axisymmetric turbulence.

  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] Kozono,H.: "Representation formula,net force and energy relation to the stationary Navier-Stokes equations in 3-dimensional exterior domains" Kyushu J.Math.51. 239-260 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kozono,H.: "Regularity criterion on weak solutions to the Navier-Stokes equations" Advances in Differential Equations. 2. 535-554 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Adachi,S.: "Vortex sound associated with vortexline reconnection in oblique collision of two vortex rings" Z.Angew.Math.Mech.77. 716-719 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Gotoh,T.: "Energy spectrum in the inertial and dissipation ranges of two-dimensional steady turbulence" Phys.Rev.E. 57. 2984-2991 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ishihara T.: "Fine-scale structure of thin vortical layers" J.Fluid Mech.364. 297-318 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kaneda Y.: "Taylor expansions and Pade approximations of Lagrangian and Eulerian two-time velocity correlations in turbulence" J.Phys.Soc.Japan. 67(4). 1075-1078 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Takahashi,N.: "Probability density function of longitudinal velocity increment in homogeneous tur-bulence" J.Phys.Soc.Japan. 68(1). 86-96 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kozono,H.: "L^1-solutions of the Navier-Stokes equations in exterior domains" Math.Ann.312. 319-340 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Oka,H.: "Numerical analysis on the motion of gas bubbles using level set method" to appear in J.Phys.Soc.Japan. 68(3). (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kaneda Y.: "Taylor expansions in powers of time of Lagrangian and Eulerian two-point two-time velocity correlations in turbulence" to appear in Phys.Fluids. 11. (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kozono, H.: "Representation formula, net force and energy relation to the stationary Navier-Stokes equations in 3-dimensional exterior domains" Kyushu J.Math.51. 239-260 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kozono, H.: "Regularity criterion on weak solutions to the Navier-Stokes equations" Advances in Differential Equations. 2. 535-554 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Adachi, S.: "Vortex sound associated with vortexline reconnection in oblique collision of two vortex rings" Z.Angew.Math.Mech.77. 716-719 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Gotoh, T.: "Energy spectrum in the inertial and dissipation ranges of two-dimensional steady turbulence" Phys.Rev.E. 57. 2984-2991 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ishihara, T.: "Fine-scale structure of thin vortical layrs" J.Fluid Mech.364. 297-318 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kaneda, Y.: "Taylor expansions and Pade approximations of Lagrangian and Eulerian two-time velocity correlations in turbulence" J.Phys.Soc.Japan. 67-4. 1075-1078 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kozono, H.: "L^1-solutions of the Navier-Stokes equations in exterior domains" Math.Ann.312. 319-340 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takahashi, N.: "Probability density function of longitudinal velocity increment in homogeneous turbulence" Phys.Soc.Japan. 68-1. 86-96 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Oka, H.: "Numerical analysis on the motion of gas bubbles using level set method" to appear in J.Phys.Soc.Japan. 68-3. (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kaneda, Y.: "Taylor expansions in powers of time of Lagrangian and Eulerian two-point two-time velocity correlations in turbulence" to appear in Phys.Fluids. 11. (1999)

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

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Published: 1999-12-08  

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