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Evolution of flow velocities in a rectangular channel with homogeneous bed roughness.

Romdhane, Hela and Soualmia, Amel and Cassan, Ludovic and Masbernat, Lucien Evolution of flow velocities in a rectangular channel with homogeneous bed roughness. (2017) International Journal of Engineering Research, 6 (3). 120-125. ISSN 2319-6890

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Official URL: http://www.ijer.irponline.in/

Abstract

The flow velocity above large scale roughness is investigated for low and steep slope between 0 and 4 %. The experiments were conducted in the laboratory of Fluid Mechanics Institute of Toulouse -IMFT. For the velocity measurement, the channel is equipped with a fast camera and a lightening system. The originality of the study lies in the application of a particle tracking technique (Particle Tracking Velocimetry). It is a non-intrusive measurement technique to measure instantaneous velocity in two-dimensional fields in stationary and unsteady flows. Analysis of the results is performed by processing images taken by the camera using a developed detection algorithm. A logarithmic distribution has been found for The velocity profiles which are influenced by roughness and slope. The obtained results show a depression of the maximum speed below the free surface. This behavior indicates a delay of the flow in the vicinity of the free surface and this is a direct consequence of the presence of secondary flows in these areas.

Item Type:Article
Additional Information:Thanks to International Journal of Engineering Research editor. The original PDF of the article can be found at Ijer website : http://www.ijer.irponline.in/
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Institut National Agronomique de Tunisie - INAT (TUNISIA)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Carthage (TUNISIA)
Laboratory name:
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Deposited By: Ludovic CASSAN
Deposited On:13 Jun 2018 07:51

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