Fluid dynamics video of domains with spiral dislocations formed in the wake of an enslaved phase-separation front

TL;DR

This paper presents novel fluid dynamics visualizations of domain patterns with spiral dislocations formed behind enslaved phase-separation fronts, revealing complex defect structures in non-equilibrium morphologies.

Contribution

It introduces new morphologies with spiral dislocations in phase separation fronts, expanding understanding of defect formation in non-equilibrium fluid systems.

Findings

Spiral dislocation defects are observed in the wake of phase-separation fronts.

The morphology of domains is influenced by the front's speed relative to a free front.

Novel defect structures resemble crystal growth dislocations.

Abstract

Enslaved phase-separation fronts that move with a speed just smaller than that of a free front will leave in their wake a morphology of alternating domains that are roughly aligned with the front. However, these alternating domains will typically not be in phase initially. Instead there are defects. Here we present novel phase-separation morphologies that are formed in such systems where the defects are reminiscent of spiral dislocations in crystal growth.