Frictional active Brownian particles
Name
PhysRevE.102.032612.pdf
Description
Published version
Size
911.54 KB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Nie, Pin
Chattoraj, Joyjit
Piscitelli, Antonio
Doyle, Patrick
Ni, Ran
Ciamarra, Massimo Pica
Date Issued
2020
Journal
Physical Review E
Publisher
American Physical Society (APS)
Version
Final published version
Abstract
© 2020 American Physical Society. Frictional forces affect the rheology of hard-sphere colloids, at high shear rate. Here we demonstrate, via numerical simulations, that they also affect the dynamics of active Brownian particles and their motility-induced phase separation. Frictional forces increase the angular diffusivity of the particles, in the dilute phase, and prevent colliding particles from resolving their collision by sliding one past to the other. This leads to qualitatively changes of motility-induced phase diagram in the volume-fraction motility plane. While frictionless systems become unstable towards phase separation as the motility increases only if their volume fraction overcomes a threshold, frictional systems become unstable regardless of their volume fraction. These results suggest the possibility of controlling the motility-induced phase diagram by tuning the roughness of the particles.
MIT Department
Singapore-MIT Alliance in Research and Technology (SMART)
Massachusetts Institute of Technology. Department of Chemical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevE.102.032612
