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2011•Theoretical and Applied Mechanics LettersOpen access

Second-order relative exponent of isotropic turbulence

Shuxiao Wan, Ran Zheng

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Abstract

Theoretical results on the scaling properties of turbulent velocity fields are reported in this letter. Based on the Kolmogorov equation and typical models of the second-order statistical moments (energy spectrum and the second-order structure function), we have studied the relative scaling using the ESS method. It is found that the relative EES scaling exponent S2 is greater than the real or theoretical inertial range scaling exponent ξ2, which is attributed to an evident bump in the ESS range.

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Theoretical results on the scaling properties of turbulent velocity fields are reported in this letter. Based on the Kolmogorov equation and typical models of the second-order statistical moments (energy spectrum and the second-order structure function), we have studied the relative scaling using the ESS method. It is found that the relative EES scaling exponent S2 is greater than the real or theoretical inertial range scaling exponent ξ2, which is attributed to an evident bump in the ESS range.

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Available abstract

Theoretical results on the scaling properties of turbulent velocity fields are reported in this letter. Based on the Kolmogorov equation and typical models of the second-order statistical moments (energy spectrum and the second-order structure function), we have studied the relative scaling using the ESS method. It is found that the relative EES scaling exponent S2 is greater than the real or theoretical inertial range scaling exponent ξ2, which is attributed to an evident bump in the ESS range.

Key concepts: Exponent, Scaling, Isotropy, Turbulence, Statistical physics, Range (aeronautics), Order (exchange), Mathematics

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