Influence of Initial Conditions on Distributive Mixing in A Twin Flight Single Screw Extruder
Document Type
Article
Publication Date
2005
Publication Title
Chemical Engineering Communications
Abstract
Passive advection of light particles carried by a high viscosity fluid in polymer processing equipment exhibits complex behavior due in part to the nonlinearity of the equation of motion. The particle motion also exhibits sensitivity to the initial positions. A fundamental understanding of the influence of initial positions of particles on the quality and rate of distributive mixing is essential for the optimization and design of processing equipment. In this work we analyze a twin-flight single-screw extruder. Based on detailed knowledge of the flow patterns, obtained through 3-D FEM numerical simulations, we study particle motion and, implicitly, mixing in the extruder. In our model particles are massless points that do not affect the flow field or the motion of other particles. We visualize the complexity of the advection by using two-dimensional Poincaré sections. We then quantitatively examine distributive mixing for different initial locations of the light particles. Renyi entropies for different values of the parameter β were calculated and related to the various distributive-mixing characteristics they reveal.
Repository Citation
Wang, Winston; Zloczower, Ica Manas; and Kaufman, Miron, "Influence of Initial Conditions on Distributive Mixing in A Twin Flight Single Screw Extruder" (2005). Physics Faculty Publications. 289.
https://engagedscholarship.csuohio.edu/sciphysics_facpub/289
DOI
10.1080/009864490519825
Volume
192
Issue
6
Comments
The authors would like to express their gratitude to the National Science Foundation for supporting this research project under the grant DMI-9812969.