Effect of blockage ratio on flow characteristics in obstructed open channels
| Autor: | Abdul-Sahib T. Al-Madhhachi, Saad Mulahasan, Fadhil M. Al-Mohammed |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Dike
geography Environmental Engineering geography.geographical_feature_category Hydraulics Flow (psychology) Building and Construction Mechanics Geotechnical Engineering and Engineering Geology Supercritical flow Volumetric flow rate Open-channel flow law.invention Flume symbols.namesake law Froude number symbols Engineering (miscellaneous) Geology Civil and Structural Engineering |
| Zdroj: | Innovative Infrastructure Solutions. 6 |
| ISSN: | 2364-4184 2364-4176 |
| DOI: | 10.1007/s41062-021-00592-z |
| Popis: | Backwater rise is a function of flow properties, fluid characteristics, and channel geometries. Flume experiments were conducted to investigate the effect of the permeable spur dike dimensions (blockage ratios of 45% to 77%) and diameters of mono-size glass beads (7.4 mm to 26.0 mm) on the backwater rise in open channel subcritical flow. Dimensional analysis was performed to correlate different variables affecting the flow hydraulics. Flow rates of 15 and 30 m3/h were used with each spur dike size and diameter. Results show a linear relationship between the Froude number and backwater rise downstream the spur dike. High upstream water levels were observed as the blockage ratio decreased. A coefficient shape of 0.48 was suggested for permeable rectangular spur dikes using Yarnell’s equation for backwater rise with no statistical analysis differences between the measured and predicted data. Dimensional analysis was applied to predict the upstream (u/s) water levels for all models, exhibiting an excellent agreement between the measured and predicted water levels, with R2 of 0.98. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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