Computation of Cut Size

As was the case for gas-solids cyclones, we begin by computing the entrance constriction coefficient, a, from Eq. (6.1.1). If, as is often the case for vapor-liquid cyclones, the entrance duct is a circular pipe, the width variable, b, 

We compute the tangential velocity of the gas at the iimer core radius. Res, by following the calculation procedure leading up to Eq. (6.2.1) and by using the same equation reported therein for the frictional area term,j4fi. However, for the computation of the total friction factor, /, we do not use Eq. (6.1.11) but the simpler, approximate expression geared to hquids  

The all-important cut size or cut-point diameter of the irmer vortex may now be computed directly from Eq. (6.2.3) or, if necessary, Eq. (6.2.6) where the particle density, pp, now refers to the density of the liquid phase. 

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