Mixing efficiency in a pin mixing section for single-screw extruders

Document Type

Article

Publication Date

1-1-2001

Abstract

Non-Newtonian, non-isothermal, 3D finite-element simulation of mixing performance in a pin mixing section with different axial gaps in the pins has been carried out according to their realistic configurations. The quantitative evaluation of mixing ability was based on the theory of kinematics of fluid mixing. To learn and to compare the local mixing performance in a standard screw and a pin mixing section, the local mixing efficiency distribution proposed by Ottino was calculated. Also, the RTDs of these mixers were calculated in an attempt to measure mixing. The integration of the two, namely, the integrating local mixing efficiency along a number of particle pathlines from entrance to exit, together with statistical treatment, which was referred as integral mixing efficiency, then gives a quantitative judgment of the total mixing ability of a continuous mixer. The calculated results showed a nonlinear dependence of the mixing ability of a pin mixing section on the axial gap of the pins. Finally, the calculation results were compared with the experimental ones obtained in our previous study.

Identifier

0035358899 (Scopus)

Publication Title

Polymer Engineering and Science

External Full Text Location

https://doi.org/10.1002/pen.10790

ISSN

00323888

First Page

908

Last Page

917

Issue

6

Volume

41

This document is currently not available here.

Share

COinS