Quasi-1D Modeling of Polymer Melt Die Swell in Short Dies
@article{Jeong2003Quasi1DMO, title={Quasi-1D Modeling of Polymer Melt Die Swell in Short Dies}, author={Jae-Hyeuk Jeong and Arkady I. Leonov}, journal={arXiv: Fluid Dynamics}, year={2003} }
This paper describes the isothermal die swell using our recent quasi-1D model for fast (high Deborah number) contraction flows of polymers melts. Because the model analyzes the flow in several flow regions as one continuous process, it makes possible to evaluate the die swell as a qusi-1D extrudate flow in dies of various lengths. Using the asymptotic matching condition for the change in flow type at the die exit allowed us to find the swelling profile for extrudate along the flow direction…
2 Citations
Importance of Polymer Rheology on Material Extrusion Additive Manufacturing: Correlating Process Physics to Print Properties
- Materials Science
- 2021
Recent advances in the field of additive manufacturing (AM) or 3D printing, have garnered serious interest for its potential to substitute time-consuming and costly subtractive and formative manufa...
Extrudate swell analysis and simulations for the IUPAC-LDPE melt using the K-BKZ model
- Physics
- 2005
The optical system includes a first set of optics, an optical switch and a second set of optics. The first set of optics is capable of receiving light and directing the light along a first optical…
References
SHOWING 1-10 OF 26 REFERENCES
The Model of Fast Contraction Flows for Polymeric Melts
- Engineering
- 2003
The present paper develops an isothermal model for fast (high Deborah number) contraction flows of polymers from a reservoir to a die of circular or rectangular cross-sections. Two components of…
Extrudate swell and isothermal melt spinning analysis of linear low density polyethylene using the Wagner constitutive equation
- Materials Science
- 1997
One dimensional simplification in modeling some basic polymer processing operations
- Materials Science
- 1998
Abstract In this work, we present a one-dimensional, simple model to describe extrudate swell manifested by polymeric liquid emerging from a circular die. The formulation established herein can…
Analysis of plane extrudate-swell of highly elastic liquids with molecular constitutive equations
- Biology
- 1989
A theory of die‐swell
- Geology
- 1970
An elastic-fluid theory of die-swell for long dies is presented. The theory predicts a swelling ratio De/d asymptotically proportional, for large values of swelling, to the cube root of the…
Experimental and numerical study of entry flow of low-density polyethylene melts
- Engineering
- 1996
The present work deals with experimental and numerical features of entry flows of two polyethylene melts, namely a linear low-density polyethylene (LLDPE) and a low-density polyethylene (LDPE) in an…
Die Swell in Molten Polymers
- Materials Science
- 1970
The capillary flow properties of two commercial samples of polystyrene (Mw/Mn≈2.5–3.0) and three narrow distribution samples (Mw/Mn≈1.1) have been examined. Viscosity and extrudate diameter were…
Swell and distortions of high-density polyethylene extruded through capillary dies
- Materials Science
- 1996
The effect of varying the die entrance angle and the die length on extrudate swell and on the onset of extrudate distortion in capillary extrusion has been studied. Using theory from the literature,…