Abstract
A new finite element technique has been developed for using integral‐type constitutive equations in viscoelastic flow simulations with recirculating regions. The present method is relatively inexpensive and in the meantime can reach higher elasticity levels without numerical instability, compared with the best available similar calculations in the literature. The new method has been used to simulate entry flows of polymer melts in circular contractions using the K‐BKZ integral model. The numerical results show that LDPE melts exhibit a rapid corner vortex growth as the flow rate [or a dimensionless recoverable shear (SR) value] is increased, while HDPE melts do not produce a significant corner vortex growth even at very high flow rates, confirming existing numerical and experimental data. A comprehensive parametric study of the effects of elongational viscosity on vortex growth has also been carried out. It has been found that a combination of LDPE shear properties including the normal stresses with an HD...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
