Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2005-12-07
Physics
Condensed Matter
Soft Condensed Matter
7 pages, 7 figures; added figures included in the pdf version
Scientific paper
10.1103/PhysRevE.74.011401
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.
Hébraud Pascal
Ianni F.
Lasne David
Sarcia R.
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