Cyclone calculator  

Where,
vradial = Cyclon Radial Velocity
pparticle = Particle Density
pair = Air Density
r = Radial Distance
w = Rotational Velocity
d = Particle Diameter
u = Air Viscosity
Example:
Calculate the radial velocity in a cyclone by the given details
Particle density (pparticle) = 50 kilogram/meter^{3}
Air density (pair) = 20 kilogram/meter^{3}
Radial distance (r) = 15 meter
Rotational velocity (w)= 50 radian/second
Particle diameter (d) = 25 meter
Air viscosity (u) = 25 kilogram/metersecond
Solution:
Apply Formula:
Vradial = [( pparticle  pair ) r w^{2} d^{2}] / ( 18 u )
Radial velocity (vradial) = 1562500 meter/second