Curvature-induced activation of a passive tracer in an active bath.
Phys Rev E Stat Nonlin Soft Matter Phys
; 90(3): 032309, 2014 Sep.
Article
in En
| MEDLINE
| ID: mdl-25314448
ABSTRACT
We use numerical simulations to study the motion of a large asymmetric tracer immersed in a low-density suspension of self-propelled particles in two dimensions. Specifically, we analyze how the curvature of the tracer affects its translational and rotational motion in an active environment. We find that even very small amounts of curvature are sufficient for the active bath to impart directed motion to the tracer, which results in its effective activation. We propose simple scaling arguments to characterize this induced activity in terms of the curvature of the tracer and the strength of the self-propelling force. Our results suggest new ways of controlling the transport properties of passive tracers in an active medium by carefully tailoring their geometry.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Models, Molecular
/
Motion
Type of study:
Prognostic_studies
Language:
En
Journal:
Phys Rev E Stat Nonlin Soft Matter Phys
Journal subject:
BIOFISICA
/
FISIOLOGIA
Year:
2014
Document type:
Article
Affiliation country: