A cylinder of radius r; rotates at a speed w coaxially inside a fixed cylinder of radius r,. A viscous Newtonian fluid fills the space between the cylinders. a) Determine the velocity profile in the space between the cylinders b) Determine the shear stress on the surface of each cylinder. Are the shear stresses equal? Explain

Elements Of Electromagnetics
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3. A cylinder of radius r; rotates at a speed w coaxially inside a fixed cylinder of radius r,. A
viscous Newtonian fluid fills the space between the cylinders.
a) Determine the velocity profile in the space between the cylinders
b) Determine the shear stress on the surface of each cylinder. Are the shear stresses equal?
Explain.
c) Assume that the fluid is glycerin at room temperature. The cylinders are 25 cm tall,
r; = 9 cm,
cylinder at one full rotation every 10s.
and
10 cm. Calculate the torque required to steadily turn the inner
%D
Transcribed Image Text:3. A cylinder of radius r; rotates at a speed w coaxially inside a fixed cylinder of radius r,. A viscous Newtonian fluid fills the space between the cylinders. a) Determine the velocity profile in the space between the cylinders b) Determine the shear stress on the surface of each cylinder. Are the shear stresses equal? Explain. c) Assume that the fluid is glycerin at room temperature. The cylinders are 25 cm tall, r; = 9 cm, cylinder at one full rotation every 10s. and 10 cm. Calculate the torque required to steadily turn the inner %D
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