Flow Field in a Cyclone

Another commonly used model is based on the general differential balance of mass and momentum [Burgers, 1948]. Consider a steady, incompressible, and axially symmetric flow in which the body forces are negligible. In cylindrical coordinates, the equation of continuity of the fluid can be given as 

In terms of Eq. (7.12), the variations of the radial profiles of the dimensionless tangential velocity V with Rew are plotted as shown in Fig. 7.6. It is seen that the dimensionless tangential velocities reach a maximum at r 0.5 for values of Rew varying from 10 to 30. 

For the engineering design of tangential inlet cyclones, the variation of the tangential velocity in the radial direction can be correlated in a form 

For most tangential inlet cyclones, varies from 0.5 to 0.7. 

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