B Incorporation of the Inner Feed

Designating the area of the upper half of the cone Acone,th, 

We also compute a similar rotational velocity midway down the cone at radius i 2, 

An incoming particle will reach the wall of the cyclone with a 50% probability if it has a settling velocity of  

Knowing the settling velocity of the entrance cut size particle, we can now compute its size using Stokes settling law (see Chap. 2) with the centripetal acceleration replacing the acceleration of gravity. 

The above equation is strictly valid only when the particle size being computed is settling in the Stokes law regime. One may check that this is the case by computing the particle Reynolds number  

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