An Application of the Modified 0-4th-Cumulant Approximation to Homogeneous Axisymmetric Temperature Fluctuations in an Isotropic Turbulence with a Mean Temperature Gradient

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概要

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• Dynamical equations for the power spectra of turbulence energy, heat fluxand temperature variance are formulated by applying the modified 0-4th-cumulantapproximation, and are numerically solved at moderate Reynolds number 32and Prandtl number unity. Results are compared with the theoretical predictionand experiment by Sirivat & Warhaft (J. Fluid Mech. 128 (1983) 323). In parti-cular the evolution of temperature variance<?'>and heat flux (0w) in the direc-tion of a linear mean temperature gradient agree well with their theoreticalpredictions<2'>CCZ " - ' and (Ow')cct ' - '. (z is the decay exponent of the turbulenceenergy (q')/2cct-'.) Moreover temperature and heat flux transfer spectra areshown; they are essential to understand these turbulent fields.

• 社団法人日本物理学会の論文
• 1985-01-15

著者

• Sega S

  Univ. Toho Funabashi‐shi Jpn

• Sega Setsuko

  Department Of Physics Faculty Of Science University Of Toho

• NAKAUCHI Norihiko

  Department of General Education,Faculty of Medical Science,University of Toho

• Nakauchi N

  Univ. Toho Tokyo Jpn

• Nakauchi Norihiko

  Department Of General Education Faculty Of Medical Science University Of Toho

関連論文

• Effects of Homogeneous Axisymmetric Scalar Fluxes on the Cross-Correlation between Two Scalars in Isotropic Turbulence
• An Application of the Modified 0-4th-Cumulant Approximation to Homogeneous Axisymmetric Temperature Fluctuations in an Isotropic Turbulence with a Mean Temperature Gradient
• An Application of the Modified Cumulant Expansion to the Transition from Three-to Two-Dimensional Turbulence under a Uniform Magnetic Field
• An Application of the Modified Zero-Fourth-Cumulant Approximation to Homogeneous Axisymmetric Turbulence
• An Application of the Modified Zero-Fourth -Cumulant Approximation to Homogeneous Axisymmetric Boussinesq Turbulence

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