Active Brownian particles near straight or curved walls: Pressure and boundary layers

Physical Review. E
Ayhan Duzgun, Jonathan V Selinger

Abstract

Unlike equilibrium systems, active matter is not governed by the conventional laws of thermodynamics. Through a series of analytic calculations and Langevin dynamics simulations, we explore how systems cross over from equilibrium to active behavior as the activity is increased. In particular, we calculate the profiles of density and orientational order near straight or circular walls and show the characteristic width of the boundary layers. We find a simple relationship between the enhancements of density and pressure near a wall. Based on these results, we determine how the pressure depends on wall curvature and hence make approximate analytic predictions for the motion of curved tracers, as well as the rectification of active particles around small openings in confined geometries.

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Citations

Nov 6, 2018·Soft Matter·Lorenzo Caprini, Umberto Marini Bettolo Marconi
Mar 5, 2020·Soft Matter·Thomas Speck
Sep 25, 2020·Scientific Reports·Mahmoud Sebtosheikh, Ali Naji
Nov 28, 2019·Physical Review. E·Caleb G WagnerAparna Baskaran
May 2, 2020·Physical Review Letters·Peng LiuMingcheng Yang
Mar 15, 2020·Physical Review. E·Kanaya MalakarAbhishek Dhar
Dec 4, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Jens Bickmann, Raphael Wittkowski
Oct 21, 2020·Physical Review. E·Nitzan Razin
Oct 21, 2020·Physical Review. E·Mahdi Zarif, Ali Naji
Jan 13, 2021·Scientific Reports·N D SmithM I Smith
Mar 12, 2021·The European Physical Journal. E, Soft Matter·N NarinderClemens Bechinger
Mar 20, 2021·Physical Review. E·Fane FengNanrong Zhao
Apr 17, 2021·Physical Review Letters·Thomas Speck, Ashreya Jayaram
Jun 11, 2021·Physical Review Letters·Hidde D VuijkJens-Uwe Sommer

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