Characterization of melt-mixing in extrusion: Finite-time Lyapunov exponent and flow pattern structure

Yasuya Nakayama, Takemitsu Hiroki, Toshihisa Kajiwara, Koichi Kimura, Takeuchi Takahide, Hideki Tomiyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We discuss the mixing characteristics of different kneading blocks based on the numerical simulation of non-isothermal polymer melt flow. The distributive and dispersive mixing is assessed by using finite-time Lyapunov exponent and the mean stress during residence. In addition, the flow patterns associated with the different geometry of the mixing elements are quantified by the strain-rate state. Our approach is found to be useful to evaluate essential difference of mixing characteristics between the conventional kneading discs element and pitched-tip kneading discs elements.

Original languageEnglish
Title of host publicationProceedings of PPS-34
Subtitle of host publication34th International Conference of the Polymer Processing Society - Conference Papers
EditorsShih-Jung Liu
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735417939
DOIs
Publication statusPublished - Feb 6 2019
Event34th International Conference of the Polymer Processing Society, PPS 2018 - Taipei, Taiwan, Province of China
Duration: May 21 2018May 25 2018

Publication series

NameAIP Conference Proceedings
Volume2065
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference34th International Conference of the Polymer Processing Society, PPS 2018
CountryTaiwan, Province of China
CityTaipei
Period5/21/185/25/18

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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