Rectification and separation of mixtures of active and passive particles driven by temperature difference

Transport and separation of binary mixtures of active and passive particles are investigated in the presence of temperature differences. It is found that temperature differences can strongly affect the rectification and separation of the mixtures. For active particles, there exists an optimal temper...

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Bibliographic Details
Published in:The Journal of chemical physics 2020-05, Vol.152 (18), p.184903-184903
Main Authors: Zhu, Wei-jing, Li, Teng-Chao, Zhong, Wei-rong, Ai, Bao-quan
Format: Article
Language:English
Subjects:
Angular velocity
Binary mixtures
Parameter sensitivity
Separation
Temperature
Temperature gradients
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Summary:Transport and separation of binary mixtures of active and passive particles are investigated in the presence of temperature differences. It is found that temperature differences can strongly affect the rectification and separation of the mixtures. For active particles, there exists an optimal temperature difference at which the rectified efficiency is maximal. Passive particles are not propelled and move by collisions with active particles, so the response to temperature differences is more complicated. By changing the system parameters, active particles can change their directions, while passive particles always move in the same direction. The simulation results show that the separation of mixtures is sensitive to the system parameters, such as the angular velocity, the temperature difference, and the polar alignment. The mixed particles can be completely separated under certain conditions.
ISSN:0021-9606
1089-7690
DOI:10.1063/5.0005013