Flow Behavior of Different Viscoelastic Fluid in Contraction Channel

In this paper, Poly flow software is used to calculate the isothermal flow of three model fluids in contraction channel. The streamline contours, the speed contours and the pressure contours are drawn. Great efforts were put into further study of flow properties. As Weissenberg number (We)increasing, the vortex exists in the corner of contraction becomes bigger, the velocity contour is closer to the corner, the pressure drop becomes more intense. This means that, the viscoelastic polymer solution can increase the sweep efficiency. The characteristics of three model fluid are also discussed, in mathematical equations and numerical results. Oldroyd-Bmodel takes the pure viscous stress components of additional stress into account, the Phan-Thien-Tanner (PTT) model introduces the extensional viscosity parameter of polymer solution, these decide the characteristics of three model fluid.