Aggregates relaxation in a jamming colloidal suspension after shear cessation

Abstract

The reversible aggregates formation in a shear thickening, concentrated colloidal suspension is investigated through speckle visibility spectroscopy, a dynamic light scattering technique recently introduced [P.K. Dixon and D.J. Durian, Phys. Rev. Lett. 90, 184302 (2003)]. Formation of particles aggregates is observed in the jamming regime, and their relaxation after shear cessation is monitored as a function of the applied shear stress. The aggregates relaxation time increases when a larger stress is applied. Several phenomena have been proposed to interpret this behavior: an increase of the aggregates size and volume fraction, or a closer packing of the particles in the aggregates.

arXiv comment7 pages, 7 figures; added figures included in the pdf version

References in corpus (3)

• Jamming, two-fluid behaviour and 'self-filtration' in concentrated particulate suspensions
• Speckle visibility spectroscopy and variable granular fluidization
• Shear-Induced Clustering in a Simple Driven Diffusive Model

Cited by in corpus (4)

• A dynamic jamming point for shear thickening suspensions
• Statistics of bubble rearrangement dynamics in a coarsening foam
• Avalanche statistics and time-resolved grain dynamics for a driven heap
• Analogous Viscosity Equations of Granular Powders Based on Eyrings Rate Process Theory and Free Volume Concept