Abstract
We revisit the dynamics of a permanent-magnetic rigid body submitted to a spatially-uniform steadily-rotating magnetic field in Stokes flow. We propose an analytical parameterisation of the full set of equilibria depending on two key experimental parameters, and show how it brings further understanding that helps to optimise magnetisation and operating parameters. The system is often bistable when it reaches its optimal swimming velocity. A handling strategy is proposed that guarantees that the correct equilibrium is reached.
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