Active chiral particles under confinement: surface currents and bulk accumulation phenomena

Soft Matter
Lorenzo Caprini, Umberto Marini Bettolo Marconi

Abstract

In this work, we study the stationary behavior of an assembly of independent chiral active particles under confinement by employing an extension of the active Ornstein-Uhlenbeck model. The chirality modeled by means of an effective torque term leads to a drastic reduction in the accumulation near the walls with respect to the case without handedness and to the appearance of currents parallel to the container walls accompanied by a large accumulation of particles in the inner region. In the case of two-dimensional chiral particles confined by harmonic walls, we determine the analytic form of the distribution of positions and velocities in two different situations: a rotationally invariant confining potential and an infinite channel with parabolic walls. Both these models display currents and chirality induced inner accumulation. These phenomena are further investigated by means of a more realistic description of a channel, where the wall and bulk regions are clearly separated. The corresponding current and density profiles are obtained by numerical simulations. At variance with the harmonic models, the third model shows a progressive emptying of the wall regions and the simultaneous enhancement of the bulk population. We explain...Continue Reading

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Citations

Feb 25, 2020·Soft Matter·Laura NataliFabio Cecconi
May 30, 2020·Soft Matter·Lorenzo CapriniAlessandro Sarracino
Oct 21, 2020·Physical Review. E·Mahdi Zarif, Ali Naji
Jan 21, 2021·Soft Matter·Pulak K GhoshFabio Marchesoni
Nov 15, 2020·The Journal of Chemical Physics·Lorenzo Caprini, Umberto Marini Bettolo Marconi
Nov 21, 2020·Physical Review. E·Matteo PaoluzziAndrea Puglisi
Jan 16, 2021·The Journal of Chemical Physics·Lorenzo Caprini, Umberto Marini Bettolo Marconi
Dec 5, 2020·Physical Review Letters·Zhi-Feng HuangHartmut Löwen
Mar 19, 2021·Soft Matter·Lorenzo Caprini, Umberto Marini Bettolo Marconi
Mar 20, 2021·Physical Review. E·Zahra Fazli, Ali Naji
Apr 4, 2021·Entropy·Yunyun LiPulak K Ghosh
Jun 18, 2021·Physical Review. E·Kristian Stølevik Olsen
Jul 10, 2021·The Journal of Chemical Physics·Lorenzo CapriniUmberto Marini Bettolo Marconi
Oct 2, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·G H Philipp NguyenHartmut Löwen
Dec 16, 2021·The European Physical Journal. E, Soft Matter·Shalabh K Anand, Sunil P Singh
Jan 27, 2022·Soft Matter·Lorenzo CapriniHartmut Löwen

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