What is the reduction in crest length due to each end contraction?

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The head of water over a rectangular weir is 28 cm. The length of the crest of the weir end contraction suppressed is 1.27 m. Find the discharge using the Francis formula.

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The head of water over a rectangular weir is 38 cm. The length of the crest of the weir end contraction suppressed is 1.3 m. Find the discharge using the Francis formula.

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The head of water over a rectangular weir is 26 cm. The length of the crest of the weir end contraction suppressed is 1.25 m. Find the discharge using the Francis formula.

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In Bazin’s formula, the discharge is inversely proportional to the length of weir.

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In Francis formula, the effective length is –

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Find the discharge over a cipolletti weir of length 1.3 m when the head over the weir is 0.65 m. Take Cd = 0.60.

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Find the discharge over a cipolletti weir of length 1.5 m when the head over the weir is 0.85 m. Take Cd = 0.61.

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In Francis empirical expression for discharge, the relation between head of water and discharge is

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What is not the way of classifying weir based on their shape of crest?

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In discharge of water over Ogee weir, discharge is directly proportional to the first power of length.

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In discharge of water over ogee weir, discharge is directly proportional to the second power of length.

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In discharge of water over narrow crested weir, discharge is directly proportional to the cube root of acceleration due to gravity.

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For discharge over ogee weir discharge is directly proportional to length but for discharge over narrow crested weir it is inversely proportional to length.

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The time taken to empty the tank is independent of Cd but depends only on the height and acceleration due to gravity.

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Find the discharge of water flowing over a rectangular notch of 1.5 m length when the constant head over the notch is 275 mm. Take Cd = .60

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Find the discharge of water flowing over a rectangular notch of 1.3 m length when the constant head over the notch is 255 mm. Take Cd = .62

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The head of water over a rectangular notch is 700 mm. The discharge is 200 litres/s. Find the length of the notch, when CD =.63

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The head of water over a rectangular notch is 900 mm. The discharge is 300 litres/s. Find the length of the notch, when CD =.62

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The height of water on upstream and downstream side of a submerged weir of 4 m length are 24 cm and 13 cm. If Cd for free and drowned portions are .62 and .78 respectively, find the discharge over the weir.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

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The height of water on upstream and downstream side of a submerged weir of 4 m length are 23.5 cm and 14 cm. If Cd for free and drowned portions are .61 and .75 respectively, find the discharge over the weir.

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What is main reading required in calculation for rectangular notch or weir.

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Find the discharge through a rectangular orifice 2.2 m wide and 1.3 m deep fitted to a easier tank. The water level in a team is 2.5 m above the top edge of orifice.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

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In discharge of water over narrow crested weir, discharge is directly proportional to the second power of height.

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Find the discharge through a rectangular orifice 3.2 m wide and 1.7 m deep fitted to a easier tank. The water level in a team is 3.3 m above the top edge of orifice. Take Cd = 0.6

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

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In discharge of water over narrow crested weir, head of water is directly proportional to Discharge Coefficient.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

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