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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is (where R is radius of pipe)

0.577 R
0.707 R
0.423 R
0.223 R

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Hydraulics and Fluid Mechanics in ME
To avoid an interruption in the flow of a syphon, an air vessel is provided

at the inlet
at the outlet
at the summit
ay nay point between inlet and outlet

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Hydraulics and Fluid Mechanics in ME
The unit power developed by a turbine is (where P = Power developed by the turbine under a head of water (H).

P/ H²
P/ H
P/ H3/2
P/ √H

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Hydraulics and Fluid Mechanics in ME
In steady flow of a fluid, the total accele ration of any fluid particle

is always zero
is never zero
is independent of coordinates
can be zero

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Hydraulics and Fluid Mechanics in ME
The diameter of the nozzle (d) for maximum transmission of power is given by (where D = Diameter of pipe, f = Darcy’s coefficient of friction for pipe, and l = Length of pipe)

d = (D⁵/8fl)1/2
d = (D⁵/8fl)1/4
d = (D⁵/8fl)1/5
d = (D⁵/8fl)1/3

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Hydraulics and Fluid Mechanics in ME
An average value of coefficient of velocity is

0.62
0.97
0.76
0.84

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