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PIV Measuremens in Vegetated Open-Channel Flows

Author(s): Iehisa Nezu; Michio Sanjou; Takaaki Qkamoto

Linked Author(s): Michio Sanjou

Keywords: Vegetation canopy; Open-channel flow; Turbulence; PIV measurements

Abstract: It is necessary in river environment and hydraulic engineering to investigate the hydrodynamic properties in vegetated canopy rivers, in which velocity distributions are largely changed in not only vertical but also spanwise directions. In particular, it is very important to reveal such dispersive properties of velocity components, since the velocity dispersion has significant relations with turbulence transport and generation due to the vegetation wakes. So, in this study, turbulence measurements were conducted intensively in the vegetated open-channel flows by using PIV, and consequently, mean-flows, turbulence structure and coherent motions were revealed and discussed.


Year: 2007

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