Mean flow and turbulence around two series of experimental dikes

Mary Yaeger, Jennifer G. Duan

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

2 Scopus citations

Abstract

Scour around various structures obstructing flow in an open channel is a common problem; therefore a better understanding of how turbulent flow affects sediment transport is needed. Additionally, is it the mean flow or the turbulence properties that are more important in contributing to bed shear stress? To this end, an experimental study was conducted in a fixed-bed flume containing a series of dikes. Turbulence intensities and Reynold's stresses were calculated from 3-D velocity measurements gathered with a microADV. Results showed that the maximum shear stress was nearly 12-20 times that of the approach flow, while maximum turbulence intensities were about 3-5 times those of the incoming flow. Highest magnitudes of both were seen at the tip of the second dike in the three-dike series. The mean velocity appeared to have no relation to the formation of scour near the tips of the dikes but the turbulence intensities did.

Original languageEnglish (US)
Title of host publicationWorld Environmental and Water Resources Congress 2010
Subtitle of host publicationChallenges of Change - Proceedings of the World Environmental and Water Resources Congress 2010
Pages1692-1701
Number of pages10
DOIs
StatePublished - Aug 2 2010
EventWorld Environmental and Water Resources Congress 2010: Challenges of Change - Providence, RI, United States
Duration: May 16 2010May 20 2010

Publication series

NameWorld Environmental and Water Resources Congress 2010: Challenges of Change - Proceedings of the World Environmental and Water Resources Congress 2010

Other

OtherWorld Environmental and Water Resources Congress 2010: Challenges of Change
CountryUnited States
CityProvidence, RI
Period5/16/105/20/10

Keywords

  • Dikes
  • River bank erosion
  • Turbulence
  • Turbulent flow

ASJC Scopus subject areas

  • Water Science and Technology

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    Yaeger, M., & Duan, J. G. (2010). Mean flow and turbulence around two series of experimental dikes. In World Environmental and Water Resources Congress 2010: Challenges of Change - Proceedings of the World Environmental and Water Resources Congress 2010 (pp. 1692-1701). (World Environmental and Water Resources Congress 2010: Challenges of Change - Proceedings of the World Environmental and Water Resources Congress 2010). https://doi.org/10.1061/41114(371)178