Civil Engineering MCQAE Level Civil Engineering
For flow under a sluice gate (sharp-edged), the discharge per unit width in terms of gate opening a and upstream head y1 is:
Fluid MechanicsFlow Through Sluice GateMEDIUM
Choose the correct answer
A
q = Cd x a x sqrt(2g y1)
B
q = a x sqrt(g y1)
C
q = (2/3) sqrt(2g) y1^(3/2)
D
q = Cd x y1 x sqrt(2ga)
Correct Answer
A. q = Cd x a x sqrt(2g y1)
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Sluice gate: q = Cc x a x V2 = Cd x a x sqrt(2g y1) (for y1 >> a, using Bernoulli). Cd = Cc x Cv (0.6 typical). If submerged: q = Cd x a x sqrt(2g(y1 - y2)).
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