Analysing the motion of scallop-like swimmers in a noisy environment
Department of Physics, Indian Institute of Science, 560012, Bangalore, India
2 Centre for Nano Science and Engineering, Indian Institute of Science, 560012, Bangalore, India
Accepted: 21 November 2022
Published online: 5 December 2022
A scallop-like swimmer going back-and-forth (reciprocal motion) does not produce any net motility. We discuss a similar artificial microswimmer that is powered by magnetic fields. In the presence of thermal noise, the helical swimmer exhibits enhanced diffusivity during reciprocal actuation. The external magnetic drive can be further modified to break the reciprocity. Equipped with only the information on swimmer trajectories and orientations, we discuss quantitative methods to estimate the degree of reciprocity and non-reciprocity in such scenarios. The paper proposes a quantitative measure and validates the same with numerical simulations, further supported by experiments.
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