| Particle density (pparticle): | kilogram/meter3 |
| Air density (pair): | kilogram/meter3 |
| Radial distance (r): | meter |
| Rotational velocity (w): | radian/second |
| Particle diameter (d): | meter |
| Air viscosity (u): | kilogram/meter-second |
| Radial velocity (vradial): | meter/second |
Vradial = [( pparticle - pair ) r w2d2] / ( 18 u )
Where, pair is Air Density, pparticle is Particle Density, vradial is Cyclon Radial Velocity, w is Rotational Velocity, r is Radial Distance, u is Air Viscosity, d is Particle Diameter.