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Flow and drag force around a free surface piercing cylinder for environmental applications

Ducrocq, Thomas and Cassan, Ludovic and Chorda, Jacques and Roux, Hélène Flow and drag force around a free surface piercing cylinder for environmental applications. (2017) Environmental Fluid Mechanics, 17 (4). 629-645. ISSN 1567-7419

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Official URL: http://dx.doi.org/10.1007/s10652-016-9505-9

Abstract

This paper investigates flows around a free surface piercing cylinder with Froude number F<0.5 and Reynolds number around Re = 50,000. The aim of this work is to gain a better understanding of the flow behaviour in environmental systems such as fishways. The advances are based upon experimental and numerical results. Several flow discharges and slopes are tested to obtain both subcritical and supercritical flows. The drag force exerted on the cylinder is measured with the help of a torque gauge while the velocity field is obtained using particle velocimetry. For the numerical part, two URANS turbulence models are tested, the k-w SST and the RNG k-e models using the OpenFOAM software suite for subcritical cases, and then compared with the corresponding experimental results. With fishways applications in mind, the changes in drag coefficient Cd versus Froude number and water depth are studied and experimental correlations proposed. We conclude that the most suitable URANS turbulence model for reproducing this kind of flow is the k-w SST model.

Item Type:Article
Additional Information:Thanks to Springer Verlag editor. The original PDF of the article can be found at https://link.springer.com/article/10.1007%2Fs10652-016-9505-9
HAL Id:hal-01591002
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
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Agence Française pour la Biodiversité
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Deposited On:20 Sep 2017 13:54

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