Stokes-Einstein equation
Description
According to Stokes’ law, a perfect sphere traveling through a viscous liquid feels a drag force proportional to the frictional coefficient. The diffusion coefficient D of a sherical particle istproportional to its mobility: Substituting the frictional coefficient of a perfect sphere from Stokes’ law by liquid’s viscosity and sphere’s radius we have Stokes-Einstein equation.
Related formulasVariables
D | Diffusion coefficient (m2/s) |
kB | Boltzmann constant |
T | The temperature (K) |
π | pi |
n | The dynamic viscosity (Pa*s) |
r | The radius of the spherical practicle (m) |