IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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| Velocity distribution in a channel for erosion research in cohesive soils |
| Author : |
Haoyin Shan, Andreas Wagner, Kornel Kerenyi, and Junke Guo |
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Mimicking an open channel flow in a well-controlled physical model, the ex-situ scour testing device (ESTD), to study the erosion of cohesive soils is crucial to reproduce the hydrodynamic forces expected in the field. The well-controlled system enables the measurement of hydrodynamic forces acting on cohesive soil samples using a special designed sensor. Samples are mounted on the sensor that can measure shear and normal forces eroding samples. A 58 cm long, 12 cm wide and 2 cm deep channel was designed, in which the flow was propelled by a rolling belt on top of the channel and supported by a pump. Using particle image velocimetry (PIV), it was found that the belt itself produced an S-shape velocity profile. Higher belt speeds generated more curved velocity profiles. The top part of the profile had a higher velocity gradient compared to the lower part. When the belt interacts with the pump, the velocity profile gets close to that of an open channel flow.
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| File Size : |
738,051 bytes |
| File Type : |
Adobe Acrobat Document |
| Chapter : |
IAHR World Congress Proceedings
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| Category : |
34th Congress - Brisbane (2011)
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| Article : |
THEME 5: Environmental Hydraulics and Hydrology
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| Date Published : |
01/07/2011 |
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