Question
Download Solution PDFDuring the calibration of a rectangular suppressed weir in a 40 cm crest width laboratory channel, the discharge passing over the weir was measured volumetrically. What is the coefficient of discharge of the weir if it was found to pass a discharge of 0.025m3/sec under the head of 0.1 m?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Given ,
Discharge(Q) = 0.025 m3 /s
Width (b) = 40 cm = 0.4 m
Head (H) = 0.1 m
Discharge over a rectangular weir:
\({\rm{Q}} = \frac{2}{3}{{\rm{C}}_{\rm{d}}} × {\rm{L}} × \sqrt {2{\rm{g}}} × {{\rm{H}}^{\frac{3}{2}}}\)
\(0.025 = C_d × \frac{2}{3} \) × 0.4 \(× \sqrt{2 × 9.81} \) \(× (0.1)^{3/2} \)
\(C_d = 0.66 \)
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