Grade-efficiency from scaling

To make a given grade efficiency curve applicable to solid-fluid density differences Apa and liquid viscosities other than those quoted with the curve (Api, conversion of the particle size scale can be made assuming Stokes law, from which... 

We see from the figure that we can expect all catalyst particles greater than about 10 pva to be completely captured in the industrial unit. We also see that the grade-efficiency curve for the prototype has the same s-shape form as that of the model on the logarithmic scale. 

A performance curve for the proposed design can be drawn up from Figures 10.45a or 10.45 by multiplying the grade diameter at, say, each 10 per cent increment of efficiency, by the scaling factor given by equation 10.8 as shown in Figure 10.46 (p. 453). 

Figure 13. Effect of ultrasound on the efficiency of hydrogen removal from a melt flow during casting of large-scale flat-shaped ingots (1700 x 300 mm) from an AMg6 grade alloy. (1) Wa = 9.0 kW (2) 11 kW.

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