Assessing the mixing performance of extruders : indices and scale-up

• Author(s): Domingues, N. ; Gaspar-Cunha, A. ; Covas, J. A.
• Date: 2008
• Persistent ID: http://hdl.handle.net/1822/18956
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Extrusion; Mixing; Distribution; Dispersion; Scale-up
• Document Type: Conference Object
• Language: English

Description

This work proposes the use of global quantitative dispersive and distributive mixing indices to characterize the performance of a given screw. Calculation of these quantities uses a model of morphology evolution as a function of material and flow characteristics, which was coupled to a description of the flow developing along the screw from hopper to die. Scale-up on the basis of these indices is briefly discussed. Some results are presented in order to illustrate the usefulness of the methodology.