Comparative Study of Flow over Rectangular Open Channel Flume
Keywords:
Rectangular Weirs, Discharge Coefficeint, Open Channel Flume, Pressure, Flow RateAbstract
Rectangular weirs used for discharge measurement are applied in an open channel hydraulics system and are analyzed experimentally. The aim of this project is to analyze the water flow pattern in the rectangular open channel flume. It focuses on analyzing the water surface profile of the water flow over the weir in the rectangular open channel flume and also to calculate the discharge coefficient, Cd of the water discharge in the rectangular open channel flume. The review of this project is fundamentally on the description of the different form of weir. It is observed that in other to give account for discharge through a rectangular weir mathematically, the flow analysis is assumed to be frictionless, parallel and horizontally flowing little or no loss. A collection of methods, practices and rules were applied to arrive at the coefficient of discharge for 40mm (11.335, 4.514, 2.857, 2.360, 2.380, 2.668, and 2.041). For 30mm (1.5111, 0.7125, 0.6399, 0.466, 0.495, 0.481,and 0.435).For 20mm (1.508, 0.8007, 0.495, 0.377, 0.479, 0.411, 0.368). For 10m (3.030, 1.495, 0.930, 0.718, 0.540, 0.514, and 0.473). This was done by using mathematical derivation gathered through theoretical bases. There were four experiment carried out with different width of the weir and the widths are 40mm, 30mm, 20mm and 10mm width. These results are affected by the values of volume of fluid used at different point for different width, and the width of the weir. It was observed that when experimenting with the weir of 40mm, 30mm, 20mm, 10mm width, the flow rate tends to vary. It was also observed that as the pressure of water increases, the water increases in height and volume. From my analysis, it can be deduced that the flow rate of 20mm and 30mm are best fitted for smooth flow of water.
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