| Autor: |
Romdhane, Hela, Soualmia, Amel, Cassan, Ludovic, Masbernat, Lucien |
| Přispěvatelé: |
Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Agronomique de Tunisie - INAT (TUNISIA), Institut National Polytechnique de Toulouse - INPT (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université de Carthage (TUNISIA), Institut de Mécanique des Fluides de Toulouse - IMFT (Toulouse, France), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE) |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
International Journal of Engineering Research. |
| ISSN: |
2319-6890 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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