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Chemical Engineering - Fluid Mechanics - Discussion

Discussion Forum : Fluid Mechanics - Section 1 (Q.No. 49)
Fluid Mechanics
49.
Shear stress in a fluid flowing in a round pipe
varies parabolically across the cross-section.
remains constant over the cross-section.
is zero at the centre and varies linearly with the radius.
is zero at the wall and increases linearly to the centre.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
3 comments Page 1 of 1.
Midaksa bekele said:   6 years ago
Right, agree @Raj Musale.
Ilyas said:   7 years ago
Answer C is correct if and only if it is laminar flow but we give preference to laminar so c is correct tou= -dp/dx (r/2) r is the distance from the centre of the pipe.
RAJ MUSALE said:   1 decade ago
Velocity is maximum in the center of pipe and according to Bernoulli equation if velocity is maximum then pressure (stress is minimum) because pressure energy changes to kinetic energy.
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