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Issue 19, 2015
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Chirality separation of mixed chiral microswimmers in a periodic channel

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Abstract

Dynamics and separation of mixed chiral microswimmers are numerically investigated in a channel with regular arrays of rigid half-circle obstacles. For zero shear flow, transport behaviors are the same for different chiral particles: the average velocity decreases with increase of the rotational diffusion coefficient, the direction of the transport can be reversed by tuning the angular velocity, and there exists an optimal value of the packing fraction at which the average velocity takes its maximal value. However, when the shear flow is considered, different chiral particles show different behaviors. By suitably tailoring parameters, particles with different chiralities can move in different directions and can be separated. In addition, we also proposed a space separation method by introducing a constant load, where counterclockwise and clockwise particles stay in different regions of the channel.

Graphical abstract: Chirality separation of mixed chiral microswimmers in a periodic channel

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Article information


Submitted
19 Mar 2015
Accepted
03 Apr 2015
First published
07 Apr 2015

Soft Matter, 2015,11, 3852-3859
Article type
Paper
Author version available

Chirality separation of mixed chiral microswimmers in a periodic channel

B. Ai, Y. He and W. Zhong, Soft Matter, 2015, 11, 3852
DOI: 10.1039/C5SM00651A

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