Jump to main content
Jump to site search

Issue 1, 2016
Previous Article Next Article

Coalescence of drops in a 2D microchannel: critical transitions to autocatalytic behaviour

Author affiliations

Abstract

A single coalescence event in a 2D concentrated emulsion in a microchannel can trigger an avalanche of similar events that can destabilize the entire assembly of drops. The sensitive dependence of the process on numerous parameters makes the propagation dynamics appear probabilistic. In this article, a stochastic simulation framework is proposed to understand this collective behavior in a system employing a large number of drops. We discover that the coalescence propagation dynamics exhibit a critical behavior where two outcomes are favored: no avalanche and large avalanches. Our analysis reveals that this behavior is a result of the inherent autocatalytic nature of the process. The effect of the aspect ratio of the drop assembly on the propagation dynamics is studied. We generate a parametric plot that shows the region of the parameter space where the propagation, averaged over the ensemble, is autocatalytic: where the possibility of near destabilization of the drop assembly appears.

Graphical abstract: Coalescence of drops in a 2D microchannel: critical transitions to autocatalytic behaviour

Back to tab navigation

Article information


Submitted
31 Jul 2015
Accepted
25 Sep 2015
First published
25 Sep 2015

Soft Matter, 2016,12, 115-122
Article type
Paper

Coalescence of drops in a 2D microchannel: critical transitions to autocatalytic behaviour

M. Danny Raj and R. Rengaswamy, Soft Matter, 2016, 12, 115
DOI: 10.1039/C5SM01915J

Social activity

Search articles by author

Spotlight

Advertisements