Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
671343 | Journal of Non-Newtonian Fluid Mechanics | 2009 | 15 Pages |
Abstract
A modified Leonov model and Flow 2000⢠software was used to simulate the LDPE melt flows through these geometries. There was reasonable agreement between modelled at experimentally determined stress fields. Modelling however provided far more detailed stress gradient information than could be resolved from the optical techniques. A total normal stress difference (TNSD) sign criterion was used to predict the critical layer ratio for the onset of the interfacial instability in one die arrangement and good agreement between theory and experiment has been obtained.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
M.T. Martyn, R. Spares, P.D. Coates, M. Zatloukal,