View source for Template:Model theory (Text, Screen Efficiency)

Screen ''efficiency'', or the ''efficiency of undersize removal'', <math>E_{\rm US}</math> (frac), is defined as "the fraction of sub-aperture material in the feed stream which is actually recovered to the undersize stream". Formally,

:<math>E_{\rm US} = \dfrac{ Q_{\rm M, US}}{(Q_{\rm M, F}).P_{\rm Aperture} }</math>

where:
* <math>Q_{\rm {M,US}}</math> is the mass flow rate of particles in the undersize stream (t/h)
* <math>Q_{\rm {M,F}}</math> is the mass flow rate of particles in the feed stream (t/h)
* <math>P_{\rm {Aperture}}</math> is the mass fraction of particles in the feed which are smaller than the aperture size (w/w)