Abstract
A simple physical model describing the axial transport of dry particulate solids through horizontal, rotating cylinders has been investigated. Design equations are presented which relate particle hold-up in the cylinder to mass flow rate as a function of the cylinder dimension and speed of rotation. Both open-ended cylinders and cylinders with a central overflow discharge have been studied. An empirical expression has been obtained which describes the resistance to flow offered by the discharge plate as a function of the size of the discharge opening and the mass flow rate through the cylinder. Experimental verification of the physical model has been obtained on a laboratory scale for a variety of operating conditions.
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