A bi-directional low-Reynolds-number swimmer with passive elastic arms
Résumé
It has been recently shown that it is possible to design simple artificial swimmers at low Reynolds
number that possess only one degree of freedom and, nevertheless, can overcome Purcell’s celebrated
scallop theorem. One of the few examples is given by Montino and DeSimone, Eur. Phys. J. E, vol.
38, 2015, who consider the three-sphere Swimmer of Najafi and Golestanian, replacing one active arm
with a passive elastic spring. We further generalize this idea by increasing the number of springs and
show that it is possible to invert the swimming direction using the frequency of the single actuated
arm.
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