A novel modeling approach to the mixing process in twin-screw extruders

Amedu, Osaighe Kennedy, Penlington, Roger, Busawon, Krishna and Morgan, Andy (2014) A novel modeling approach to the mixing process in twin-screw extruders. In: 29th International Conference of the Polymer-Processing-Society (PPS), 15th - 19th July 2013, Nuremberg.

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Official URL: http://dx.doi.org/10.1063/1.4873728

Abstract

In this paper, a theoretical model for the mixing process in a self-wiping co-rotating twin screw extruder by combination of statistical techniques and mechanistic modelling has been proposed. The approach was to examine the mixing process in the local zones via residence time distribution and the flow dynamics, from which predictive models of the mean residence time and mean time delay were determined. Increase in feed rate at constant screw speed was found to narrow the shape of the residence time distribution curve, reduction in the mean residence time and time delay and increase in the degree of fill. Increase in screw speed at constant feed rate was found to narrow the shape of the residence time distribution curve, decrease in the degree of fill in the extruder and thus an increase in the time delay. Experimental investigation was also done to validate the modeling approach.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Residence time distribution; mean residence time; mean time delay; feed rate; screw speed
Subjects: H300 Mechanical Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Paul Burns
Date Deposited: 09 Oct 2014 08:51
Last Modified: 26 Jan 2016 16:04
URI: http://nrl.northumbria.ac.uk/id/eprint/17707

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