What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition ?
Correct answer: D. 2
- A. 0.5
- B. 0.67
- C. 1
- D. 2
Explanation
The laminar pipe-flow profile is parabolic, with the centreline velocity equal to twice the mean velocity. Hence, the axis-to-mean velocity ratio is 2.
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