Friction drag

Input(s)

$\mu$: Viscosity $(\mathrm{cP})$

$\mathrm{R}$: Radius (ft)

$v_{\infty}$: Velocity as $r$ Goes to Infinity $(\mathrm{ft} / \mathrm{s})$

Output(s)

F: Force $(N)$

Formula(s)

$$ \mathrm{F}=4 * \pi * \mu * \mathrm{R} * \mathrm{v}_{\infty} $$

Reference(s)

Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley \& Sons, Chapter: 2, Page: 60.