Oscillations in a Becker-D\"oring model with injection and depletion

TL;DR

This paper investigates a modified Becker-D"oring model with injection and depletion, revealing phase transitions and oscillatory behavior through asymptotic analysis and numerical simulations, relevant to physical chemistry and gas evolution phenomena.

Contribution

It introduces a Becker-D"oring variant with injection and depletion, analyzes phase transitions, and demonstrates oscillations via bifurcation analysis and numerical validation.

Findings

System exhibits a dynamic phase transition at critical mass density.

Time-periodic solutions emerge through Hopf bifurcation under certain rates.

Numerical simulations show desynchronized cluster dynamics causing oscillations.

Abstract

We study the Becker-D\"oring bubblelator, a variant of the Becker-D\"oring coagulation-fragmentation system that models the growth of clusters by gain or loss of monomers. Motivated by models of gas evolution oscillators from physical chemistry, we incorporate injection of monomers and depletion of large clusters. For a wide range of physical rates, the Becker-D\"oring system itself exhibits a dynamic phase transition as mass density increases past a critical value. We connect the Becker-D\"oring bubblelator to a transport equation coupled with an integrodifferential equation for excess monomer density by formal asymptotics in the near-critical regime. For suitable injection/depletion rates, we argue that time-periodic solutions appear via a Hopf bifurcation. Numerics confirm that the generation and removal of large clusters can become desynchronized, leading to temporal oscillations associated with bursts of large-cluster nucleation.