A Study of the Turbulent Flows behind a Rectangular Sharp Crested Weir in Open Channel Using Laser Doppler Velocimetry. | ||||
| MEJ- Mansoura Engineering Journal | ||||
| Article 5, Volume 33, Issue 3, September 2008, Page 1-11 PDF (2.11 MB) | ||||
| Document Type: Research Studies | ||||
| DOI: 10.21608/bfemu.2020.127477 | ||||
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| Author | ||||
| M. I. Attia* | ||||
| Associate Professor., Water & Water Structures Engineering Department., Faculty of Engineering., Zagazig University., Zagazig., Egypt. | ||||
| Abstract | ||||
| This paper describes the experimental investigation using laser Doppler velocimetry) (LDV) in the downstream of .be rectangular sharp crested weir in a horizontal rectangular channel of constant width. The study was carried out for flows on smooth and rough weir. For precise and accurate measurements of mean and fluctuating a ting flow characteristics such as streamwise and vertical turbulence intensity components and streamwise and vertical mean velocity components. The depthwise measurements were carried out for different heights of the weir along to e centerline at different cross sections downstream of weir in the wake region . The results show that, the measured values of turbulence intensities are found to have high level of turbulence in the Dear wake region but are low in the far wake region. The turbulence intensities depict the occurrence of a constant turbulence close to the wall in the far wake region. The roughness was found to increase the turbulence. Also, it can be seen that with increasing weir height, the turbulence intensities are Increased. | ||||
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