Turbulence Flow Field and Local Scour around Three-Pier Group

Jennifer G. Duan, Kang Zhou

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

Abstract

This paper presented the experimental results of flow field measurements using Acoustic Doppler Vectrino Profiler around a three-pier group. The piers were spaced at one and five times the pier diameter, and the attacking angles were set at 0 and 30o, respectively, to study the effect of pier spacing and attack angle on turbulence flow field. The distribution of flow velocity vectors and turbulence intensities were analyzed in both the horizontal and vertical planes. A strong sheltering effect from the upstream pier in a tandem alignment was observed when piers spacing is small. The horseshoe vortices around the middle and downstream piers were enhanced when the piers were in a staggered alignment. The distributions of bed shear stress showed that when the scour reached equilibrium, bed shear stress in the scour hole is smaller than that of the approaching flow.

Original languageEnglish (US)
Title of host publicationProceedings of the 40th IAHR World Congress
EditorsHelmut Habersack, Michael Tritthart, Lisa Waldenberger
PublisherInternational Association for Hydro-Environment Engineering and Research
Pages564-573
Number of pages10
ISBN (Print)9789083347615
DOIs
StatePublished - 2023
Externally publishedYes
Event40th IAHR World Congress, 2023 - Vienna, Austria
Duration: Aug 21 2023Aug 25 2023

Publication series

NameProceedings of the IAHR World Congress
ISSN (Print)2521-7119
ISSN (Electronic)2521-716X

Conference

Conference40th IAHR World Congress, 2023
Country/TerritoryAustria
CityVienna
Period8/21/238/25/23

Keywords

  • Flow field
  • Horseshoe vortex
  • Local scour
  • Multiple pier group
  • Staggered piers
  • Tandem piers
  • Turbulence

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Civil and Structural Engineering
  • Ocean Engineering
  • Water Science and Technology

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