For laminar flow of Newtonian fluid in a circular pipe, the velocity distribution is a function of the distance 'd' measured from the centre line of the pipe, and it follows a ______________ relationship?
Correct answer: B. Parabolic
- A. Logarithmic
- B. Parabolic
- C. Hyperbolic
- D. Linear
Explanation
The Hagen-Poiseuille velocity profile is u = umax[1 − (d/R)²], so velocity varies parabolically with distance from the centreline. A linear profile applies only to simple shear flow between parallel surfaces.
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