Extrudate swell of linear and branched polyethylenes: ALE simulations and comparison with experiments

Three-dimensional transient complex free surface flows: Numerical simulation of XPP fluid

“…For instance, Debbaut and Marchal [34] numerically modeled this problem using the POLYFLOW commercial software, while Aloku and Yuan [35] simulated the double convected Pom-Pom model on a foaming process in extrusion flow. A recent study of axisymmetric extrudate swell for the XPP model using an Arbitrary Lagrangian Eulerian (ALE) finite element formulation was presented by Ganvir et al [36], showing good agreement with experimental results.…”

Theoretical prediction and experimental measurement of isothermal extrudate swell of monodisperse and bidisperse polystyrenes

“…It is therefore necessary to use a fluid dynamics package capable of computing viscoelastic flows. This has been attempted in the context of extrudate swell using the K-BKZ [9], Phan-Thien Tanner (PTT) [10], Oldroyd-B [11] and the Pom-Pom [12] models amongst others. In 2011 Ganvir et al [12] used a Lagrangrian-Eulerian method and the XPP (eXtended Pom-Pom) [13] model.…”

“…This has been attempted in the context of extrudate swell using the K-BKZ [9], Phan-Thien Tanner (PTT) [10], Oldroyd-B [11] and the Pom-Pom [12] models amongst others. In 2011 Ganvir et al [12] used a Lagrangrian-Eulerian method and the XPP (eXtended Pom-Pom) [13] model. They reported reasonable agreement with experiment for commercial grade polydisperse polyethylenes although the simulations consistently over-predicted swelling due to non-isothermal effects Most of the experiments performed thus far have included a complicating factor making accurate prediction of extrudate swell difficult.…”

Study on extrudate swell of polypropylene in double-lumen micro profile extrusion

“…However, challenges are still encountered in the above aspects. Regarding the first point, the accurate characterization of viscoelastic properties of polymer melts is required ( Ganvir et al, 2011). Traditionally, the generalized Newtonian fluid represented by viscosity model is used in the industrial applications, which can produce acceptable results with ease in some cases.…”

“…The viscoelastic extrudate swell of axisymmetric capillary (Ganvir et al, 2011) and annular die (Mu et al, 2010) has been extensively studied. Experiments were also conducted to observe the axisymmetric extrudate swell (Garciarejon et al, 1995).…”