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https://feeds.library.caltech.edu/people/Yan-Wen/monograph.rss
A Caltech Library Repository Feedhttp://www.rssboard.org/rss-specificationpython-feedgenenTue, 16 Apr 2024 14:33:48 +0000The force on a body in active matter
https://resolver.caltech.edu/CaltechAUTHORS:20160120-145959501
Authors: {'items': [{'id': 'Yan-Wen', 'name': {'family': 'Yan', 'given': 'Wen'}, 'orcid': '0000-0002-9189-0840'}, {'id': 'Brady-J-F', 'name': {'family': 'Brady', 'given': 'John F.'}, 'orcid': '0000-0001-5817-9128'}]}
Year: 2016
DOI: 10.48550/arXiv.1510.07731
We present a general theory for determining the force (and torque) exerted on a boundary (or body) in active matter. The theory extends the description of passive Brownian
colloids to self-propelled active particles and applies for all ratios of the thermal energy kBT to the swimmer's activity k_sT_s = ζU^2_0T_R/6, where ζ is the Stokes drag coefficient, U_0 is the swim speed and T_R is the reorientation time of the active particles. The theory has
a natural microscopic length scale over which concentration and orientation distributions are confined near boundaries, but the microscopic length does not appear in the force.
The swim pressure emerges naturally and dominates the behavior when the boundary size is large compared to the swimmer's run length ℓ = U_0T_R. The theory is used to
predict the motion of bodies of all sizes immersed in active matter.https://authors.library.caltech.edu/records/jjrz3-11d10