NUMERICAL INVESTIGATION OF NORMAL STRESS DIFFERENCE AND VISCOSITY USING OF DYNAMICAL MODELS IN SLIT DIE

In this paper, the flow behavior of Leonov-Like conformational rheological model, which has root in the generalized Poisson bracket formalism based on the conformation tensor, have been studied in the slit die flow. Prediction of the normal stress differences during the flow of these fluids lets us to follow and calculate relaxation dependent phenomena such as die swell. The model predictions have been compared for the two families of mobility expressions. The Study of the model prediction sensitivity to its mobility term shows that model predictions can cover a wide range of rheological behaviors generally observed for polymer melts and solutions in the circular die flow.

Keywords:

Conformation tensor , Flow field , Leonov-like model , Slit die