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Fluctuations of turbulent bed shear stress.

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Fluctuations of turbulent bed shear stress.

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dc.contributor.author Cheng, Nian-Sheng
dc.contributor.author Law, Adrian Wing-Keung
dc.date.accessioned 2012-03-20T06:05:53Z
dc.date.available 2012-03-20T06:05:53Z
dc.date.copyright 2003
dc.date.issued 2012-03-20
dc.identifier.citation Cheng, N. S., & Law, A. W. K. (2003). Fluctuations of turbulent bed shear stress. Journal of Engineering Mechanics, 129(1), 126-130.
dc.identifier.issn 0733-9399
dc.identifier.uri http://hdl.handle.net/10220/7642
dc.description.abstract With the assumption that the bed shear stress fluctuates in a lognormal fashion, the probability density function PDF of the standardized bed shear stress is derived as a function of the relative shear stress intensity. The PDF is more skewed with larger relative intensities, but approaches a Gaussian function when the relative intensity is small. The computed PDF agrees well with the reported experimental data for flows over a smooth boundary. The higher-order moments of the bed shear stress, skewness, and kurtosis, are shown analytically to be also dependent on the relative intensity. The theoretical dependencies are then compared to a number of measurements available in the literature. The Reynolds number effect on the relative intensity is also discussed.
dc.format.extent 15 p.
dc.language.iso en
dc.relation.ispartofseries Journal of engineering mechanics
dc.rights © 2003 ASCE. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Engineering Mechanics, American Society of Civil Engineers. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1061/(ASCE)0733-9399(2003)129:1(126)].
dc.subject DRNTU::Engineering::Civil engineering::Water resources.
dc.subject DRNTU::Engineering::Mechanical engineering::Fluid mechanics.
dc.title Fluctuations of turbulent bed shear stress.
dc.type Journal Article
dc.contributor.school School of Civil and Environmental Engineering
dc.identifier.doi http://dx.doi.org/10.1061/(ASCE)0733-9399(2003)129:1(126)
dc.description.version Accepted version

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