Hydrocyclones sketches

As representative examples of the various machineries used for classification mention may be made of mechanical classifiers, hydraulic classifiers, and hydrocyclones. Simplified sketches of these have been shown in Figure 2.12 (A-C). 

A few streamhnes of the secondary flow in a meridian plane of the hydrocyclone 0 = constant) are sketched in Figure 17.7. The secondary flow is determined by the radial and vertical components of the velocity. Under the hypothesis that the rotational component is dominant, the flow has a two-dimensional structirre (equations [17.4]). Only the axial component of the velocity varies with z. The variation with z is linear, resulting from the conditions of incompressibihty. 

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