Simulation of Vortex growth in planar entry flow of a viscoelastic fluid
E. Mitsoulis,J. Vlachopoulos,F. A. Mirza;E. Mitsoulis;J. Vlachopoulos;F. A. Mirza;
journal of applied polymer science1985Vol. 30pp. 1379-1391
164
mirza1985journalsimulation
Abstract
A numerical simulation of entry flow in a slit die has been undertaken for a fluid that is Newtonian in shear but exhibits normal stresses (Boger fluid). Experimentally measured normal stress and viscosity data are included in a simple rheological model. Flow patterns reveal the existence of vortices in the reservoir corners. Vortex size and intensity increase rapidly with elasticity level.