Effects of Homogeneous Axisymmetric Scalar Fluxes on the Cross-Correlation between Two Scalars in Isotropic Turbulence

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概要

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• Mixing of two scalars in isotropic turbulence is studied by using the modified zero-4th-cumulant (MZFC) expansion. The dynamical equations of scalar fluxes andcovariance spectra are formulated by the MZFC approximation under the assump-tion of homogeneous axisymmetric diffusion of scalar, and are solved numerically toexamine the behavior of their spectra. Particular attention is paid to an axisymmetriceffect of scalar fluxes on the covariance. The numerical result shows that when twoscalar-fluxes exist in turbulent flows, they induce the anisotropy covariance so that thetwo-scalar covariance increases in the direction of a symmetric axis and decreases inthe direction transverse to it.

• 社団法人日本物理学会の論文
• 1986-11-15

著者

• 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 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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