Three-dimensional mean flow and turbulence around a spur dike

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

Abstract

This paper presents an experimental study conducted at the St. Anthony Falls Laboratory, University of Minnesota. Flow field at the neighborhood of a spur dike was measured by using a SonTek 10 MHz Acoustic Doppler Velocimeter (ADV). Time-history of velocities in all three spatial dimensions was recorded at 650 nodes near the dike. The time-averaged mean velocity and Reynolds stresses were calculated from the measurements. The results showed two counter-rotating secondary flow cells formed immediately downstream of the dike. The secondary flow cell at one side of the channel having the dike grows gradually, while the other cell decades until separated flows rejoin. These measurements clearly demonstrated the spatial distributions of turbulent normal stresses and Reynolds stresses. Additionally, bed shear stresses were calculated by using mean flow and turbulence Reynolds stresses. Bed shear stresses calculated by using Reynolds' stresses are more accurate for approximating bed shear stresses field around the dike.

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 - Dec 1 2007
Externally publishedYes
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

Other

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

Keywords

  • Channels
  • Dikes
  • Restoration
  • Three-dimensional flow

ASJC Scopus subject areas

  • Environmental Science(all)

Fingerprint Dive into the research topics of 'Three-dimensional mean flow and turbulence around a spur dike'. Together they form a unique fingerprint.

Cite this