Civil Engineering MCQAE Level Civil Engineering
The head loss at a sudden contraction in a pipe is approximately:
Fluid MechanicsHead Loss Sudden ContractionMEDIUM
Choose the correct answer
A
0.5(V2^2 - V1^2)/(2g)
B
0.5 x V2^2/(2g)
C
(V1 - V2)^2/(2g)
D
V1^2/(2g)
Correct Answer
B. 0.5 x V2^2/(2g)
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Head loss at sudden contraction: h_c = K_c x V2^2/(2g), where K_c = 0.5 for sharp-edged contraction (empirical). The loss is due to flow separation and formation of vena contracta just downstream of the contraction.
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