Stokes' law

During sedimentation, the particle is exposed to gravity (F g = mg = V ρ particle g) and buoyancy force according to Archimedes' law (F vz = V ρ liquid g). When the density of the particle is greater than the density of the liquid, the particle begins to sink .

Its movement is opposed by a resistance force , given by the Stokes relation:

$F_{resistance}=6\cdot \pi \cdot \eta \cdot r\cdot v$,

where r = radius of the particle, η = dynamic viscosity of the medium , v = velocity of the particle.

Links

Related articles

• Viscosity measurement

Source

• KUBATOVA, Senta. Biofot [online]. [cit. 2011-01-31]. <https://uloz.to/!CM6zAi6z/biofot-doc>.