B Worked Example with Slip

A Worked Example for Calculation of the Critical Deposition Velocity 

This solution is identical to the rigorous (trial and error) solution of Eq. (12.2.1) to within three significant figures. It may be noted that the second term enclosed in parenthesis above is negligible in comparison to the first. Accordingly in this particular example, Eq. (12.2.4) also provides an excellent approximation to Eq. (12.2.1)  

B Worked Example Taking Into Account Slip in Calculation of the Cut Size 

72 m diameter cyclone described in Appendices 4.A and 5.A is to be operated at an absolute pressure of 0.1 atmosphere. We wish to compute the X50 cut-point diameter. We shall assume, for the sake of simplicity, that there is no change in the total friction factor as a result of the decrease in operating pressure. 

Note—due to the ten-fold reduction in pressure, our mean free path is ten times that of air at standard conditions. 

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