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Flow characteristics of plunging flows in steep sloping channels with a horizontal channel portion

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Abstract

This paper presents the effect of an aerated inflow on flow conditions of a plunging flow region in steep sloping channels (30 and 55°) with a horizontal channel portion. The flow condition of the plunging flow region and the reverse flow length are affected by the depth averaged air-concentration ratio of the aerated inflow. For a fully aerated inflow with a large downstream depth, a high velocity jet decays in a short distance, and a hydraulic jump is formed on the sloping channel portion. However, for a non-aerated inflow with a large downstream depth, a high velocity jet continues far downstream as a wall jet. The effect of aerated inflow on the velocity field in the plunging flow region has been shown.

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Authors and Affiliations

  1. College of Science and Technology, Department of Civil Engineering, Nihon University, 1-8 Kanda Surugadai, Chiyoda-ku, Tokyo, Japan

    Youichi Yasuda & Iwao Ohtsu

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  1. Youichi Yasuda
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  2. Iwao Ohtsu
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Correspondence to Youichi Yasuda.

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Dedicated to Professor Wilhelm Schneider on the occasion of his 70th birthday

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Yasuda, Y., Ohtsu, I. Flow characteristics of plunging flows in steep sloping channels with a horizontal channel portion. Acta Mech 201, 95–104 (2008). https://doi.org/10.1007/s00707-008-0075-x

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  • DOI: https://doi.org/10.1007/s00707-008-0075-x

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