  The dynamics of a triangular magnetocapillary swimmer is studied using the
lattice Boltzmann method. Performing extensive numerical simulations taking
into account the coupled dynamics of the fluid-fluid interface and of magnetic
particles floating on it and driven by external magnetic fields we identify
several regimes of the swimmer motion. In the regime of high frequencies the
swimmer's maximum velocity is centered around the particle's inverse coasting
time. Modifying the ratio of surface tension and magnetic forces allows to
study the swimmer propagation in the regime of significantly lower frequencies
mainly defined by the strength of the magnetocapillary potential. Finally,
introducing a constant magnetic contribution in each of the particles in
addition to their magnetic moment induced by external fields leads to another
regime characterised by strong in-plane swimmer reorientations that resemble
experimental observations.

Soft Condensed Matter;Fluid Dynamics