Magnetic control of micrometric Ni particles and particle chains in a fluid driven by rotating fields

M LLERA; G. A. JORGE; V. BEKERIS

San Carlos de Bariloche

Conferencia; XXIII Slafes; 2019

CAB-CNEA

In this work, we present a study on the propulsion of dispersed magnetic particles in a viscous fluid after the application of arotating magnetic field. We analyze the net translational movement that arises from the hydrodynamic coupling with the bottomplate and we find that, for clusters of up to three particles, there is a cooperative effect that makes them move faster thanindividual particles. In turn, the particles are driven in highly controlled complex trajectories by rotating the plane containing thevector of the magnetic field. Successive particle chains fragmentation and recombination is also described.