Question:
The maximum velocity of a fluid in a tube for which the flow remains streamlined is called its:
The maximum velocity of a fluid in a tube for which the flow remains streamlined is called its:
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Critical velocity depends on the fluid's density, viscosity, and the diameter of the tube.
Updated On: Apr 7, 2026
- Terminal velocity
- Critical velocity
- Turbulent velocity
- Streamlined velocity
- Surface velocity
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The Correct Option is B
Solution and Explanation
Critical velocity is the highest velocity a fluid can attain while still maintaining laminar (streamlined) flow.
Beyond this speed, the flow becomes turbulent. \[ \text{Reynolds number} \, (Re) = \frac{\rho v d}{\eta} \] where \( v \) is the velocity of the fluid. If \( Re \) exceeds a critical value (typically around 2000 for pipe flow), turbulence occurs.
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