Question

The formula $\dfrac{P}{D^2N^3}$ denotes which of the following number in impeller problems?

• A. Weber number
• B. Froude number
• C. Power number
• D. Euler number

Hint:

$Np = \frac{P}{D^5N^3}$ (sometimes simplified), used in mixing

Answer 1

The Correct Option is C

The power number (Np) is a dimensionless number used to describe the performance of an impeller in fluid flow systems.