Interaction of a finite-size particle with the moving lid of a cavity

The motion of a solid particle in a lid-driven cavity is investigated. If the tangential velocity of the lid is large the streamlines are dense near the moving lid and the finite size of a particle can have a profound effect on its trajectory. To assess this effect different particle-motion models are examined: inertial point particles (Maxey–Riley equation) one-way coupled to the flow and finite-size particles the flow around which is fully resolved (two-way coupling). We compare the corresponding trajectories with those obtained using the particle–surface interaction model originally introduced by Hofmann and Kuhlmann [Phys. Fluids 23, 0721106 (2011)]. The finite-size effect on the particle's trajectory is quantified and discussed. (© 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim)