We verify numerically the theoretical stress singularities for two viscoelastic models that
occur at sharp corners. The models considered are the Giesekus and Phan-Thien–Tanner …

In flows with re-entrant corners, polymeric fluids can exhibit a recirculation region along the
wall upstream from the corner. In general, the formation of these vortices is controlled by …

This work presents a numerical study of the 4: 1 planar contraction flow of a viscoelastic fluid
described by the simplified Phan-Thien–Tanner model under the influence of slip boundary …

The steady planar and cylindrical stick-slip flows for a viscoelastic fluid are computed using
the Phan-Thien and Tanner (PTT) constitutive model. The mixed finite element method is …

We consider the planar flow of Phan-Thien-Tanner (PTT) fluids in geometries where a
singular stress is encountered. The main problem considered is flow around a sharp corner …

Viscoelastic fluids can be difficult to model due to the wide range of different physical
behaviors that polymer melts can exhibit. One such feature is the viscous elastic boundary …

The local asymptotic behaviour is given for planar re-entrant corner flows of Phan-Thien–
Tanner fluids with a solvent viscosity. The solvent stress and Newtonian velocity field …

We consider the planar flow of Oldroyd-B fluids around sharp corners. Two distinct cases
arise for the corner geometry, where the corner angle is denoted by π/α. For 1/2≤ α< 1 we …

The motion of a contact line is examined, and comparisons drawn, for a variety of proposed
models in the literature. We provide an overview and extension of the original work on the …

Neste projeto investiga-se numericamente escoamentos com escorregamento utilizando
uma formulação alternativa para descrever o tensor que representa os efeitos viscoelásticos …