Resonant and Invariant Advection in Single-Screw Extrusion

Autor:	Wook Ryol Hwang, TH Tai Hun Kwon
Rok vydání:	2002
Předmět:	Materials science Polymers and Plastics Advection General Chemical Engineering Perturbation (astronomy) Helix angle Geometry Torus Mechanics Breakup Industrial and Manufacturing Engineering Finite element method Adverse pressure gradient Particle tracking velocimetry Materials Chemistry
Zdroj:	International Polymer Processing. 17:309-317
ISSN:	2195-8602 0930-777X
DOI:	10.3139/217.1710
Popis:	In this paper, we discussed how unmixed and well-mixed zones are determined by the practical design parameters of the Chaos Screw (CS) system for the single-screw extruder, e. g. the helix angle, the magnitude of adverse pressure gradient, and the fraction of no-barrier zone. The key concept is the frequency ratio distribution of the unperturbed system. Through the extensive three-dimensional numerical simulations with finite element methods and particle tracing techniques, successive creation and breakup of resonant orbits and KAM tori in terms of design parameters are presented. The results show that one can predict the spatial configuration of well-mixed and unmixed zones from the frequency ratio distribution and the amount of the perturbation strength. Finally, the exit time distributions caused by dynamical structures are discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d8d9a8f11b49f8103157e524ee0d3c4f https://doi.org/10.3139/217.1710 Zobrazit plný text záznamu