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Particle image analysis of open-channel flow at a backward facing step having a trench

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Abstract

Characteristics of open-channel flow at a backward facing step with a trench section were experimentally investigated. The experiments were performed using a straight open channel flume by varying the trench length. Two-dimensional velocity measurements by the particle tracking velocimetry (PTV) were conducted at the trench section using a high-resolution video camera of 12 fps. Mean and turbulent flow properties along with the water surface profile were measured for various aspect ratios of the trench. It was also observed that the flow at the trench begins to oscillate periodically for a specific aspect ratio of the trench.

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Authors and Affiliations

  1. Research Center for Urban Safety and Security, Kobe University, Rokkodai, Nada-ku, 657-8501, Kobe, Japan

    Fujita I.

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  1. Fujita I.
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Ichiro Fujita: He received his M.Sc. (Eng) degree in Civil Engineering in 1979 and Ph.D. degree in 1990 from Kobe University. He worked in Gifu University from 1982 to 1999. He was a visiting associate professor in the Iowa Institute of Hydraulic Research, the University of Iowa from 1995 to 1996. He has been working as an associate professor in the Research Center for Urban Safety and Security, Kobe University since 1999. His research interests are image measurement of river flow, open-channel turbulence and numerical simulation of rapidly varying flow

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Fujita, I. Particle image analysis of open-channel flow at a backward facing step having a trench. J Vis 5, 335–342 (2002). https://doi.org/10.1007/BF03182348

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  • DOI: https://doi.org/10.1007/BF03182348

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