Transcript Thermodynamics I

QUESTIONS
Last class
 Continuity
 Bernoulli Equation
Homework
 Water flows through a 2-inch
diameter pipe at 200 lbm/min. Its
temperature is 60oF. Find the velocity
of water flow (fps).
Homework
 Water from a pipe line is diverted into
weigh tank for exactly 9 minutes.
Tank weight increases 4765 lbf.
Water temperature is 60oF. Find the
flow rate (gpm).
Homework
 Steady flow of gas through a pipe
whose diameter decreases from 1.0
meter to 60cm. The gas density
decreases from 2 kg/m3 to 1.6 kg/m3.
The entering velocity is 25 m/s.
What is exit velocity (m/s)?
Example
How long
will it take
for level to
drop from
h = 3m to
h = 30cm?
60 cm diameter
3 cm diameter
Example
 Manometer measures flow of
kerosene in a pipe; manometer fluid
is mercury. SG of kerosene is 0.8.
Deflection of manometer is 7 in. Find
flow velocity.
References
Images & examples
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Applied Fluid Mechanics, 6th Edition, Mott, Prentice Hall
Engineering Fluid Mechanics, 5th Edition Crowe, &
Roberson, Wiley