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GATE Exam Questions

Q1:

Shear stress develops on a fluid element, if :

A the fluid is at least

B the fluid-container is subject to uniform linear acceleration

C the fluid is inviscid

D the fluid is viscous and the flow is nonuniform

ANS:D - the fluid is viscous and the flow is nonuniform

Fluid element considering:

i) Newtonian fluid=shear stress direct proportional to shear strain or velocity gradient(real fluid),n=1.
ii) Non - Newtonian fluid=shear stress not proportional to shear strain or velocity gradient(real fluid),n<1.



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