The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be_______________?
Correct answer: A. Parabolic
- A. Parabolic
- B. Hyperbolic
- C. Straight line
- D. None of these
Explanation
For laminar flow in an open channel, the velocity is zero at the bed and increases to a maximum at the free surface, giving a parabolic vertical profile. This is analogous to the parabolic profile in laminar pipe flow.
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