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CLC number: O357.5; TV131.21

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Received: 2008-03-24

Revision Accepted: 2008-07-29

Crosschecked: 2008-12-29

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Journal of Zhejiang University SCIENCE A 2009 Vol.10 No.3 P.392-397

http://doi.org/10.1631/jzus.A0820215


Scaling properties of Navier-Stokes turbulence


Author(s):  Zhao-cun LIU

Affiliation(s):  School of Environment and Planning, Henan University, Kaifeng 475001, China

Corresponding email(s):   liuzc17@yahoo.com.cn

Key Words:  Transformation equations, Scaling, Spiral structure, Cascade, Turbulence


Zhao-cun LIU. Scaling properties of Navier-Stokes turbulence[J]. Journal of Zhejiang University Science A, 2009, 10(3): 392-397.

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author="Zhao-cun LIU",
journal="Journal of Zhejiang University Science A",
volume="10",
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publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A0820215"
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T1 - Scaling properties of Navier-Stokes turbulence
A1 - Zhao-cun LIU
J0 - Journal of Zhejiang University Science A
VL - 10
IS - 3
SP - 392
EP - 397
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Y1 - 2009
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A0820215


Abstract: 
The property of the velocity field and the cascade process of the fluid flow are key problems in turbulence research. This study presents the scaling property of the turbulent velocity field and a mathematical description of the cascade process, using the following methods: (1) a discussion of the general self-similarity and scaling invariance of fluid flow from the viewpoint of the physical mechanism of turbulent flow; (2) the development of the relationship between the scaling indices and the key parameters of the She and Leveque (SL) model in the inertial range; (3) an investigation of the basis of the fractal model and the multi-fractal model of turbulence; (4) a demonstration of the physical meaning of the flowing field scaling that is related to the real flowing vortex. The results illustrate that the SL model could be regarded as an approximate mathematical solution of Navier-Stokes (N-S) equations, and that the phenomena of normal scaling and anomalous scaling is the result of the mutual interactions among the physical factors of nonlinearity, dissipation, and dispersion. Finally, a simple turbulent movement conceptional description model is developed to show the local properties and the instantaneous properties of turbulence.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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