Mixer Power

Power = Power Number x Density x Rotational Speed3 x Impeller Diameter5

for common engineering units:

Power (P) - horsepower

Power Number (Np) - dimensionless quantity depending on impeller

geometry - a constant for turbulent conditions and geometric

similarity - need to know geometry of impeller for value (typical values between 0.3 and 6.0)

Density (sp.gr.) - specific gravity w/respect to water

Rotational Speed (N) – rpm

Impeller Diameter (D) – inches

Viscosity is not a factor for turbulent conditions

P = Np x (sp.gr.) x N3 x D5/1.524x1013