Fluid mechanics
Second year
Dr. Naira Meky
Eng. Asmaa M.Ameen
EXERCISE NO 5
1. A pipe line tapers from 8 cm diameter to 4 cm diameter. the quantity of water flowing
through the pipe is 100 lit/sec. find the average velocities at the two sections.
2. Air flows between two parallel plates 80 mm a part. the following velocities were
determined by direct measurement distance from one
Plate
(mm) 0 10 20 30 40 50 60 70 80
Velocity
(m/s)
0 23 28 31 32 29 22 14 0
Plot the velocity profile and calculate the discharge per unit width and mean velocity.
3. Investigate the flow fields of steady in compressible fluids having the following
velocity components
a U=6 V=9
b U=5 V=3x
c U=8y V=0
Showing which flow field is physically possible and if the flow is rotational or
irrotational.
