Stokes Law Calculator  

Acceleration of Gravity :
g= 18 μ V_{t} /d^{2}(ρ_{p}  ρ_{m})
Particle Diameter :
d= √18 μ V_{t} /g (ρ_{p}  ρ_{m})
Density of Medium :
ρ_{m} = ρ_{p}  18 μ V_{t}/ d^{2}
Particle Density :
ρ_{p} = 18 μ V_{t} /d^{2}+ ρ_{m}
Viscosity of Medium :
μ = g_{d}^{2}( ρ_{p}  ρ_{m})/18 V_{t}
Where,
V_{t} = Fall or Settling Velocity,
g = Acceleration of Gravity,
d = Particle Diameter,
ρ_{m} = Density of Medium,
ρ_{p} = Particle Density,
μ = Viscosity of Medium.
Example:
Calculate the fall or settling velocity (Vt) for the given details through Stoke's Law formula.
Acceleration of Gravity (g) = 25 m/s^{2}
Particle Diameter (d) = 15 m
Density of Medium (ρ_{m}) = 5 kg/m^{4}
Particle Density (ρ_{p}) = 10 kg/m^{3}
Viscosity of Medium (μ) = 20 kg/ms
Solution:
Apply formula:
V_{t} = gd^{2} (ρ_{p}  ρ_{m})/18μ
V _{t}= 25*15 (105)/18*20
Fall or Settling Velocity (V_{t}) = 78.13 m/s