The vena contracta effect reduces the actual discharge through a sharp-edged orifice primarily because:

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Physics · Fluid Mechanics

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Correct answer

The cross-sectional area of the jet downstream is smaller than the orifice area

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Answer 1

The velocity at the orifice is lower than ideal due to viscous losses

Answer 2

The fluid density decreases after leaving the orifice

Answer 3

The cross-sectional area of the jet downstream is smaller than the orifice area

Answer 4

The head above the orifice decreases significantly during discharge

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