Determination of Critical Point of Particle Migration Direction in a Confined Shear Flow of Giesekus Fluids

Migration of a particle in confined shear flow Giesekus fluids is investigated numerically with the method direct forcing/fictitious domain. We focus on migration direction for initial lateral position y0 and determination critical point yc moving towards center line or wall. The effect viscosity ratio μr, shear-thinning parameter α, Weissenberg number Wi, blocking rate β value analyzed. results showed that when μr ≤ 0.5, will migrate wall regardless y0. When > increases increasing some particles increase μr. more likely to at small values Wi α but large impact obvious. = 0.3 β. have little influence pressure distribution case same near faster because positive negative appear around particle.