Environmental Fluid Mechanics

, Volume 14, Issue 4, pp 873–893 | Cite as

Experimental and large eddy simulation study of the flow developed by a sequence of lateral obstacles

  • W. BrevisEmail author
  • M. García-Villalba
  • Y. Niño
Original Article


In this paper we provide a description of the three-dimensional flow induced by a sequence of lateral obstacles in a straight shallow open-channel flow with flat bathymetry. The obstacles are modelled as rectangular blocks and are located at one channel wall, perpendicular to the main stream direction. Two aspect ratios of the resulting dead zones are analysed. The flow structure is experimentally characterised by particle image velocimetry measurements in a laboratory flume and simulated using three-dimensional Large Eddy Simulations. Good agreement between experimental measurements and numerical results is obtained. The results show that the effect of the obstacles in the main channel is observed up to one obstacle length in the spanwise direction. The spacing between obstacles does not seem to have a large influence in the outer flow. The mean flow within the dead zone is characterised by a large recirculation region and several additional vortex systems. They are discussed in the paper, as well as the mean and root-mean-square wall shear-stresses.


Dead zones Particle image velocimetry Large eddy simulation Shallow flow Groyne fields 


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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  1. 1.Structural and Civil Engineering DepartmentUniversity of SheffieldSheffieldUK
  2. 2.Universidad Carlos III de MadridBioingeniería e Ingeniería AeroespacialLeganésSpain
  3. 3.Civil Engineering Department and Advanced Mining Technology CentreUniversity of ChileSantiagoChile

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