Answer to Question #235994 in Civil and Environmental Engineering for Awesh

Question #235994

The space between two parallel horizontal plates kept 6 mm apart is filled with 

crude oil of dynamic viscosity 2.5 kg/ms. If the lower plate is stationary and upper plate 

is pulled with a velocity of 1.25 m/s. determine the shear stress on the lower plate.


1
Expert's answer
2021-09-12T00:32:26-0400


To find:

"\\tau" (Shear stress in the oil)

"du\/dy=v\/h=constant"

"1.25\/0.004=312.5\/s"

"\\tau" ="2.5\\times312.5=781.25N\/m^2"

Thus the Shear stress between the oil layers is "781.25N\/m^2"


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