Constriction flows of monodisperse linear entangled polymers: Multiscale modeling and flow visualization.

Collis, M.W.; Lele, A.K.; Mackley, M.R.; Graham, R.S.; Groves, D.J.; Likhtman, A.E.; Nicholson, T.M.; Harlen, O.G.; McLeish, T.C.B.; Hutchings, L.R.; Fernyhough, C.M.; Young, R.N.

Abstract

We explore both the theology and complex flow behavior of monodisperse polymer melts. Adequate quantities of monodisperse polymer were synthesized in order that both the materials rheology and microprocessing behavior could be established. In parallel, we employ a molecular theory for the polymer theology that is suitable for comparison with experimental rheometric data and numerical simulation for microprocessing flows. The model is capable of matching both shear and extensional data with minimal parameter fitting. Experimental data for the processing behavior of monodisperse polymers are presented for the first time as flow birefringence and pressure difference data obtained using a Multipass Rheometer with an 11:1 constriction entry and exit flow. Matching of experimental processing data was obtained using the constitutive equation with the Lagrangian numerical solver, FLOWSOLVE. The results show the direct coupling between molecular constitutive response and macroscopic processing behavior, and differentiate flow effects that arise separately from orientation and stretch.

Citation

Collis, M., Lele, A., Mackley, M., Graham, R., Groves, D., Likhtman, A., …Young, R. (2005). Constriction flows of monodisperse linear entangled polymers: Multiscale modeling and flow visualization. Journal of Rheology, 49(2), 501-522. https://doi.org/10.1122/1.1849180

• Journal Article Type: Article
• Publication Date: 2005-03
• Journal: Journal of Rheology
• Print ISSN: 0148-6055
• Electronic ISSN: 1520-8516
• Publisher: American Institute of Physics
• Peer Reviewed: Peer Reviewed
• Volume: 49
• Issue: 2
• Pages: 501-522
• DOI: https://doi.org/10.1122/1.1849180
• Public URL: https://durham-repository.worktribe.com/output/1570905