Stokes–Einstein relation (source code)

= Stokes–Einstein relation
{c}
{title2=$D=k_BT/\zeta$}
{wiki}

The Stokes–Einstein relation connects translational diffusion and linear drag through $D=k_BT/\zeta$. For an unbounded spherical particle, $\zeta=6\pi\mu a$ and $D=k_BT/(6\pi\mu a)$.