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Velocity of fluid in pipe is not uniform across section area. Therefore a mean velocity is used and it is calculated by the continuity equation for the steady flow as:
The answer is V=Q/S V= velocity ( m/sec)
Q= Flow rate M3/S
S= pipe section in M2
the flow calculation is based on Reynolds number
Re= 123.9 p V D / u
V average velocity in ft/sec
D diameter in inch
u is viscosity
p is density in lbs/ft^3
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