What is the ratio of total kinetic energy of fluid passing per second to the value obtained on the basis of average velocity (for laminar flow through a circular pipe) ?
Correct answer: D. 2
- A. 0.5
- B. 1
- C. 1.5
- D. 2
Explanation
For laminar flow in a circular pipe, the parabolic velocity profile makes the kinetic-energy correction factor α equal to 2. Thus the actual kinetic energy rate is twice the value calculated using the average velocity.
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