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CLC number: O357.5; TV131.21

On-line Access: 2010-07-06

Received: 2010-01-27

Revision Accepted: 2010-05-26

Crosschecked: 2010-06-22

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Journal of Zhejiang University SCIENCE A 2010 Vol.11 No.7 P.505-510


Velocity distribution and scaling properties of wall bounded flow

Author(s):  Zhao-cun Liu, Wei-jia Fan

Affiliation(s):  Key Laboratory of Inland Waterway Regulation of Communications Industry, Chongqing Jiaotong University, Chongqing 400074, China, Key Laboratory of Waterway Engineering of Communication Ministry and Chongqing City, Chongqing Jiaotong University, Chongqing 400074, China

Corresponding email(s):   Liuzc17@yahoo.com.cn

Key Words:  Velocity distribution, Scaling, Turbulence

Zhao-cun Liu, Wei-jia Fan. Velocity distribution and scaling properties of wall bounded flow[J]. Journal of Zhejiang University Science A, 2010, 11(7): 505-510.

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author="Zhao-cun Liu, Wei-jia Fan",
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%A Zhao-cun Liu
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%D 2010
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%DOI 10.1631/jzus.A1000044

T1 - Velocity distribution and scaling properties of wall bounded flow
A1 - Zhao-cun Liu
A1 - Wei-jia Fan
J0 - Journal of Zhejiang University Science A
VL - 11
IS - 7
SP - 505
EP - 510
%@ 1673-565X
Y1 - 2010
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1000044

The scaling and similarity of wall bounded turbulent flow were studied. The properties of such flows and the relationship between a power law and a logarithmic type of velocity distribution were investigated. Based on the physical mechanism involved, our results show that the power law and the logarithmic distribution are only different forms with the same hypothesis and hold only in the outer flow zone. Thus, a universal explanation for various empirical formulae of velocity distribution was obtained. Manning’s formula was studied to explain theoretically the experiential result that the roughness coefficient is only a comprehensive parameter of the whole system without a corresponding physical factor. The physical mechanism of the velocity distribution of parallel to wall bounded flow was explored, the results show that the parameters in the formula of velocity distribution are indices of the system responding to flowing environmental factors to represent general case of boundary roughness and the flowing state, corresponding physical mechanism is vortex motion.

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


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