# Friction factor for creeping flow around a sphere

## Input(s)

D: Diameter (ft)

v: Velocity of Fluid \((\mathrm{ft} / \mathrm{s})\)

\(\rho\): Density of Fluid \((\mathrm{g} / \mathrm{cc})\)

\(\mu\): Viscosity of Fluid \((\mathrm{cP})\)

## Output(s)

f: Friction Factor (dimensionless)

## Formula(s)

\[
\mathrm{f}=\frac{24 * \mu}{\mathrm{D} * \mathrm{v} * \rho}
\]

## Reference(s)

Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons, Chapter: 6, Page: 186.