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New publication in Physical Review Letters

Realization of a two-beads microswimmer in the analytical model, lattice-Boltzmann simulations and the experiment.Realization of a two-beads microswimmer in the analytical model, lattice-Boltzmann simulations and the experiment.

June 2021 – As postulated by the Scallop Theorem, swimming at low Reynolds numbers requires non-reciprocity in time in the swimmer stroke. In our article entitled “Scallop Theorem and swimming at the Mesoscale” we employ a system of two connected asymmetric particles both having significant inertia and demonstrate a directed controlled swimmer motion even driven in a reciprocal fashion. The asymmetry in coasting times of the particles acts as a second degree of freedom and satisfies the scallop theorem. Our numerical lattice-Boltzmann simulations confirm the outcome of the analytical model whose predictions are approved in subsequent experiments using magnetic particles placed at an air/water interface.

This research is the result of a longstanding collaboration between the theoretical department of the Helmholtz Institute Erlangen-Nuernberg, the theory group of Prof. A. Smith (Friedrich-Alexander University) and the experimental department of Prof. N. Vandewalle (University of Liege, Belgium).

Contact

A. Sukhov
Dr. Alexander Sukhov
PostDoc
Phone: +49 911 32169-114
email: a.sukhov@fz-juelich.de

J. Harting
Prof. Dr. Jens Harting
Head of Research Department
Phone: +49 911 32169-113
email: j.harting@fz-juelich.de

Detailed Information

Scallop Theorem and Swimming at the Mesoscale

Further Announcement

Tiny symmetric swimmer evades basic rule of fluid dynamics

Additional Information