An Application of the Modified Zero-Fourth-Cumulant Approximation to Homogeneous Axisymmetric Turbulence

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概要

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• Equations of energy spectra in homogeneous axisymmetric turbulence areformulated by applying the modified zero-fourth-cumulant approximation andnumerically solved under the three different initial conditions : (A) three-dimen-sional anisotropic turbulence; (B) two-dimensional isotropic velocity fluctuationstransverse to the direction of axisymmetry 2 ; (C) one directional homegeneousfluctuations parallel to 2. The results show that in the case (A) Herring's over-relaxation is observed, and that in the case (B) an inverse energy cascade charac-teristic of two-dimensional isotropic turbulence is observed. Also, it is shownthat for strongly anisotropic cases (B) and (C) an approach to isotropy is muchslower than for less anisotropic case (A).

• 社団法人日本物理学会の論文
• 1984-05-15

著者

• Nakauchi Norihiko

  Department Of General Education Faculty Of Medical Science University Of Toho

関連論文

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• 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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