Application of modified log-wake law in open-channels

Junke Guo, Pierre Y. Julien

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

We extend the modified log-wake law, which was developed for turbulent pipe and boundary layer flows, to open-channel turbulence. Like those in pipes and boundary layers, turbulent velocity profile in open-channels can be approximated with three components: (1) the law of the wall that results from the constant bed shear stress; (2) the law of the wake that reflects the effects of gravity, secondary currents and bed roughness; and (3) the cubic correction near the maximum velocity. The modified log-wake law compares very well with experimental data from Coleman, Lyn, Kironoto and Graf and Sarma et al. It also replicates the measured velocity profile of cross-section of the Mississippi River. In particular, it can well model the velocity dip phenomenon in open-channels where the conventional log-wake law fails.

Original languageEnglish (US)
Title of host publicationExamining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006
DOIs
StatePublished - 2007
EventWorld Environmental and Water Resources Congress 2006: Examining the Confluence of Environmental and Water Concerns - Omaha, NE, United States
Duration: May 21 2006May 25 2006

Publication series

NameExamining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006

Conference

ConferenceWorld Environmental and Water Resources Congress 2006: Examining the Confluence of Environmental and Water Concerns
CountryUnited States
CityOmaha, NE
Period5/21/065/25/06

Keywords

  • Flow measurement
  • Open channel flow
  • River flow

ASJC Scopus subject areas

  • Environmental Science(all)

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  • Cite this

    Guo, J., & Julien, P. Y. (2007). Application of modified log-wake law in open-channels. In Examining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006 [200] (Examining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006). https://doi.org/10.1061/40856(200)200