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Intermittency Growth in Fluid Turbulence |
| ZHU Jian-Zhou |
| State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871 |
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| Cite this article: |
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ZHU Jian-Zhou 2006 Chin. Phys. Lett. 23 2139-2142 |
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Abstract Measurement and phenomenological analyses of intermittency growth in an experimental turbulent pipe flow and numerical turbulence are performed, for which working definitions such as degree, increment, and growth rate of intermittency are introduced with the help of quasiscaling theory. The logarithmic--normal inertial scaling model is extended to quasiscaling as the second-order truncation of the Taylor expansion and is used for studying the intermittency growth problem. The extended self-similarity properties are shown to be not consistent with the monotonicity of the third order local quasiscaling exponent and the nonmonotonic behaviour of the intermittency growth rate as a result of bottleneck. Digestions of the results with scale-dependent multifractals are provided.
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| Keywords:
47.27.Gs
05.45.Df
05.10.Gg
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Published: 01 August 2006
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| PACS: |
47.27.Gs
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(Isotropic turbulence; homogeneous turbulence)
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05.45.Df
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(Fractals)
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05.10.Gg
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(Stochastic analysis methods)
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