Multiple dynamic regimes in a coarsening foam
arXiv:2006.04919 · doi:10.1088/1361-648X/abb684
Abstract
We use differential dynamic microscopy and particle tracking to determine the dynamical characteristics of a coarsening foam in reciprocal and direct space. At all wavevectors investigated, the intermediate scattering function exhibits a compressed exponential decay. However, the access to unprecedentedly small s highlights the existence of two distinct regimes for the -dependence of the foam relaxation rate . At any given foam age, at high , consistent with directionally-persistent and intermittent bubble displacements. At low , we find . We show that such change in -dependence of relates to a bubble displacement distribution exhibiting a cut-off length of the order of the bubble diameter. Investigations of the -dependence of at different foam ages reveal that foam dynamics is not only governed by the bubble length scale, but also by the strain rate imposed by the bubble growth; normalizing by this strain rate and multiplying with the age-dependent bubble radius leads to a collapse of all data sets onto a unique master-curve.
J. Phys.: Condens. Matter (2020)
References in corpus (24)
- A density-independent glass transition in biological tissues
- Differential Dynamic Microscopy: Probing wave vector dependent dynamics with a microscope
- Slow dynamics in glassy soft matter
- Atomic-scale relaxation dynamics and aging in a metallic glass probed by X-ray photon correlation spectroscopy
- Evolution of particle-scale dynamics in an aging clay suspension
- Elastic consequences of a single plastic event : a step towards the microscopic modeling of the flow of yield stress fluids
- Energy barriers govern glassy dynamics in tissues
- Length scale dependence of dynamical heterogeneity in a colloidal fractal gel
- Anomalous dynamical light scattering in soft glassy gels
- Ultraslow dynamics and stress relaxation in the aging of a soft glassy system
- Perspective: Nonequilibrium glassy dynamics in dense systems of active particles
- Elastically driven, intermittent microscopic dynamics in soft solids
- Resolving long-range spatial correlations in jammed colloidal systems using photon correlation imaging
- Relaxation in yield stress systems through elastically interacting activated events
- Active glasses
- Dichotomic Aging Behaviour in a Colloidal Glass
- Giant fluctuations and structural effects in a flocking epithelium
- Growth laws and self-similar growth regimes of coarsening two-dimensional foams: Transition from dry to wet limits
- Plasticity of a colloidal polycrystal under cyclic shear
- Unexpected spatial distribution of bubble rearrangements in coarsening foams
- Statistics of bubble rearrangement dynamics in a coarsening foam
- Controlling the dynamics of a bidimensional gel above and below its percolation transition
- Dark Field Differential Dynamic Microscopy enables the accurate characterization of the roto-translational dynamics of bacteria and colloidal clusters
- Avalanche statistics during coarsening dynamics