Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
Numerical simulation of the extrudate-swell using the integral KBKZ-PSM equation
Submission Author:
Murilo Tomé , SP
Co-Authors:
Juliana Bertoco
Presenter: Murilo Tomé
doi://10.26678/ABCM.ENCIT2016.CIT2016-0291
Abstract
In this work is presented the numerical simulation of Extrudate-Swell problem using the integral KBKZ- PSM constitutive equation. The two-dimensional numerical method proposed herein is a finite difference technique for simulating flows possessing moving surfaces that can interact with solid walls. The momentum and mass conservation equations are solved by an implicit method. The integral equations describing the components of the extra-stress tensor are solved by a second-order quadrature formula and the Finger tensor is convected using the ideas of the deformation fields method proposed by Hulsen and co-workers. Integral constitutive models are known to provide a good fitting to the rheology of Boger fluids and polymer melts, as for example high density polyethylene (HDPE) and low density polyethylene (LDPE) that are usually employed by many industries. The results reported here were obtained using Boger Fluids. It is shown that the high elasticity effects exhibited by these solutions are well captured by the KBKZ-PSM integral model.
Keywords
KBKZ PSM equations, Extrudate swell, Boger Fluids
