Design basis and hydrodynamic performance analysis of single-screw extruders. II - viscous power loss

Abstract

Purpose - The purpose of this paper is to investigate the design dimensions in pressure or metering region of a single-screw extruder by determining viscous power loss. The paper is the second part of a series. Design/methodology/approach - Viscous power loss formed in the extruder screw channel and the radial clearance is determined and evaluated in terms of non-dimensional parameters in order to obtain a theoretical model. Findings - The theoretical model developed is capable of estimating the viscous power loss in the extruder metering region. With the model developed, extruder geometry and viscous power loss under different operating conditions can be predicted. Originality/value - This paper offers a quick and easy opportunity to examine the viscous power loss in the extruder.