Characteristics of Air Entrainment in Hydraulic Jump
| Autor: | M S S Albarkani, Lai Wai Tan, Adel Al-Gheethi |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | IOP Conference Series: Earth and Environmental Science. 140:012063 |
| ISSN: | 1755-1315 1755-1307 |
| DOI: | 10.1088/1755-1315/140/1/012063 |
| Popis: | The characteristics of hydraulic jump, especially the air entrainment within jump is still not properly understood. Therefore, the current work aimed to determine the size and number of air entrainment formed in hydraulic jump at three different Froude numbers and to obtain the relationship between Froude number with the size and number of air entrainment in hydraulic jump. Experiments of hydraulic jump were conducted in a 10 m long and 0.3 m wide Armfield S6MKII glass-sided tilting flume. Hydraulic jumps were produced by flow under sluice gate with varying Froude number. The air entrainment of the hydraulic jump was captured with a Canon Power Shot SX40 HS digital camera in video format at 24 frames per second. Three discharges have been considered, i.e. 0.010 m3/s, 0.011 m3/s, and 0.013 m3/s. For hydraulic jump formed in each discharge, 32 frames were selected for the purpose of analysing the size and number of air entrainment in hydraulic jump. The results revealed that that there is a tendency to have greater range in sizes of air bubbles as Fr1 increases. Experiments with Fr1 = 7.547. 7.707, and 7.924 shown that the number of air bubbles increases exponentially with Fr1 at a relationship of N = 1.3814 e 0.9795Fr1. |
| Databáze: | OpenAIRE |
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