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

Autor: Yasuya Nakayama, Takemitsu Hiroki, Toshihisa Kajiwara, Koichi Kimura, Takeuchi Takahide, Hideki Tomiyama
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Zdroj: AIP Conference Proceedings; 2019, Vol. 2065 Issue 1, p030032-1-030032-5, 5p, 1 Graph
Abstrakt: We discuss the mixing characteristics of different kneading blocks based on the numerical simulation of nonisothermal 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. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index