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PIV and LDA measurements of secondary flow in a meandering channel for overbank flow

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Abstract

Secondary flow in a compound meandering channel with straight floodplain banks for overbank was investigated by a visualization method and velocity measurement using three-component laser Doppler anemometor (LDA). The secondary flow in a cross section was visualized by the neutral buoyant tracer method with a submergible video camera. Secondary flow vectors in a cross section were obtained by using PIV software with captured frames from video source through PC and also by LDA measurements. From the comparison of the PIV and LDA results, it is found that PIV data show good agreement in quality with LDA measurements when the secondary flow is strong and stable as shown in this paper.

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Authors
  1. Ishigaki T.
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  2. Shiono K.
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  3. Rameshwaran P.
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Additional information

Taisuke Ishigaki: He is Associate Professor in Ujigawa Hydraulics Laboratory, Disaster Prevention Research Institute (DPRI) of Kyoto University, Japan. He obtained his Doctor of Engineering from Kyoto University in 1994 and was a research associate of DPRI from 1981 to 1994. He was a guest researcher at University of Karlsruhe, Germany in 1987 and a visiting researcher of Loughborough University, UK in 2000. His research interests are Flood Disaster, River Hydraulics, Turbulence Structure of Open Channel Flow, Hydraulic Modelling, Flow Visualization and Flow Measurement.

Koji Shiono: He is Professor of Environmental Hydrodynamics, Loughborough University, UK. After a PhD in Civil Engineering, University of Birmingham, he worked as a research fellow at University of Birmingham from 1981 to 1989, a lecturer at University of Bradford from 1989 to 1993, and a senior lecturer at Loughborough University from 1994 to 1999. He has been a visiting lecturer at Kyoto University, a research fellow at Tokyo Institute of Technology and Kyushu Institute of Technology, a visiting professor at Kyushu University, Japan and a European Senior Fellow. His research interests are Hydrodynamics, Turbulence, Stratified Flow, River Hydraulics and Mathematical Modelling.

Ponnambalam Rameshwaran: He is a research scientist in the Centre for Ecology and Hydrology (CEH Wallingford). He obtained his PhD from the University of Aberdeen in 1998 and was a post-doctoral researcher in Department of Civil and Building Engineering, Loughborough University from 1998 to 2000. His research interests are Hydraulic/Mathematical Modelling, Sediment Transport, Turbulent Flow Structures, Computational Fluid Dynamics (CFD) and Flood Defence.

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Ishigaki, T., Shiono, K. & Rameshwaran, P. PIV and LDA measurements of secondary flow in a meandering channel for overbank flow. J Vis 5, 153–159 (2002). https://doi.org/10.1007/BF03182424

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  • DOI: https://doi.org/10.1007/BF03182424

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