| We investigate the effects of finite size and inertia of a small spherical particle immersed in an open unsteady flow which, for ideal tracers, generates transiently chaotic trajectories. The inertia effects may strongly modify the chaotic motion to the point that attractors appear in the configuration space. These studies are performed in two-dimensional, low Reynolds nr. flows past a cylindrical obstacle. We discuss the possibility of particle mixture segregation and trapping induced by simple geometric arrangements of obstacles in such fluid flows. |
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