At low Reynolds number______________?
Correct answer: D. Viscous forces control and inertial forces are unimportant
- A. Viscous forces are unimportant
- B. Viscous forces control
- C. Gravity forces control
- D. Viscous forces control and inertial forces are unimportant
Explanation
A low Reynolds number means inertial forces are small compared with viscous forces, so viscosity controls the flow behaviour. This is why creeping-flow approximations are used in the low-Reynolds-number region.
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