Abstract
Three-dimensional viscoelastic flows in a rectangular channel with a cavity were numerically studied. The finite volume method was applied for solving the discretized equation. The simplified Phan-Thien Tanner (PTT) model was applied for a constitutive equation. The simulation was carried out for three Weissenberg numbers We=0.2, 2, 4 and for three values of the model parameter ε=0.001, 0.01, 0.25. In addition, Newtonian flows were also calculated for comparison. In viscoelastic flows, the swell of the main flow was observed near the entrance to the cavity and the vortex inside the cavity was asymmetric. When We was large, three-dimensional flow properties appear obviously.
