Journal Article10.1146/ANNUREV.FLUID.33.1.265
Extrusion Instabilities and Wall Slip
596
TL;DR: In this paper, the authors explore the evidence for slip, the possible mechanisms of slip, and the relation between slip and extrusion instabilities, and show that extrusion melts exhibit extrusion instability at sufficiently high levels of stress.
read more
Abstract: ▪ Abstract Polymer melts exhibit extrusion instabilities at sufficiently high levels of stress, and they appear to exhibit wall slip. I explore the evidence for slip, the possible mechanisms of slip, and the relation between slip and extrusion instabilities.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Numerical Simulation of Sharkskin Phenomena in Polymer Melts
TL;DR: In this article, the authors used a stick-slip boundary condition at the die wall, mimicking a mechanism of molecular entanglement/disentanglement at the wall.
Numerical study of viscoelastic upstream instability
TL;DR: In this paper , the authors report numerical results on the flow instability and bifurcation of a viscoelastic fluid in the upstream region of a cylinder in a confined narrow channel.
Annular Newtonian Poiseuille flow with pressure-dependent wall slip
Kostas D. Housiadas,Evgenios Gryparis,Georgios C. Georgiou +2 more
The influence of material properties and process parameters on energy consumption in the single-screw extrusion of PVC tubes
Andrea Pieressa
TL;DR: The energy consumption in single-screw extrusion of PVC tubes is influenced by both material properties and process parameters. A regression model was developed to estimate the energy consumption based on the material properties.
References
•Book
Rheology: Principles, Measurements, and Applications
Christopher W. Macosko
- 01 Oct 1994
TL;DR: This text tackles the tensor in such a way as to make the problems accessible and understandable - by simplifying notation and making the three-dimensional approach to rheology practical.
3.9K
The Structure and Rheology of Complex Fluids
Martin Kröger,J. Vermant +1 more
TL;DR: R.G. Larson as discussed by the authors defines complex fluids as "substances that flow at modest stresses" and by flow, the author means a smooth deformation on a humanly accessible time scale.
Instabilities in viscoelastic flows
TL;DR: In this article, the authors present a review of the latest developments as well as earlier work in this area, organized into the following categories: Taylor-Couette flows, instabilities in cone and plate-and-plate flows, parallel shear flows, extrudate distortions and fracture, Instabilities in shear flow with interfaces, extensional flows, and thermohydrodynamic instabilities.
988
Shear-dependent slippage at a polymer/solid interface
F. Brochard,P. G. de Gennes +1 more
TL;DR: In this paper, the authors discuss shear flows of a polymer melt near a solid surface onto which a few chains (chemically identical to the melt) have been grafted.
537
Instabilities in polymer processing
C. J. S. Petrie,Morton M. Denn +1 more
TL;DR: The experimental observations and the extent of theoretical understanding of the instabilities in shear and extensional flows in polymeric liquids are discussed in this paper, where the experimental observations are compared with theoretical understanding.
474