Ordering kinetics in the active model B

Abstract

We undertake a detailed numerical study of the Active Model B proposed by Wittkowski, [Nature Commun. 5, 4351 (2014)]2041-172310.1038/ncomms5351. We find that the introduction of activity has a drastic effect on the ordering kinetics. First, the domain growth law shows a crossover from the usual Lifshitz-Slyozov growth law for phase separation (L∼t1/3, where t is the time) to a novel growth law (L∼t1/4) at late times. Second, the equal-time correlation function of the density field exhibits dynamical scaling for a given activity strength λ, but the scaling function depends on λ. © 2021 American Physical Society.