Collective dynamics of active circle-swimming Lennard-Jones particles

Phys Chem Chem Phys. 2022 Aug 24;24(33):19792-19798. doi: 10.1039/d2cp01000c.

Abstract

We report a numerical study on the collective dynamics of self-propelling and circle-swimming Lennard-Jones (LJ) particles in two dimensions using Brownian dynamics simulations. We investigate the combined role of attraction, self-propulsion and rotation in their phase behavior. At a low rotational speed, the system shows re-entrant phase behavior as a function of self-propulsion similar to active Brownian particles (ABPs). Increasing the rotational speed shifts the point of re-entrance or makes it disappear depending on the attractive strength. Although active rotation is known to suppress motility induced phase separation, the presence of attractive interactions reduces this effect.

MeSH terms

  • Molecular Dynamics Simulation*
  • Rotation
  • Swimming*