2008/07/31 by Thomas Gibaud, Catherine Barentin, Sébastien Manneville +1 · 3 citations
Chemical Engineering · Engineering · Materials Science · Physics and Astronomy · #Boundary value problem #Composite material #Granular flow and fluidized beds #Material Dynamics and Properties #Materials science #Mechanics #Nanotechnology #Physics #Rheology and Fluid Dynamics Studies #Shear (geology) #Slip (aerodynamics) #Soft materials #Thermodynamics #cond-mat.soft
paper · pdf · doi:10.1103/physrevlett.101.258302
published as Physical Review Letters 25, 101 (2008) 258302 · 4 pages, 5 figures
openalex publication_date 2008/12/19 · arxiv created 2009/01/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The yielding behavior of a sheared Laponite suspension is investigated within a 1 mm gap under two different boundary conditions. No-slip conditions, ensured by using rough walls, lead to shear localization as already reported in various soft glassy materials. When apparent wall slip is allowed using a smooth geometry, the sample breaks up into macroscopic solid pieces that get slowly eroded by the surrounding fluidized material up to the point where the whole sample is fluid. Such a drastic effect of boundary conditions on yielding suggests the existence of some macroscopic characteristic length that could be connected to cooperativity effects in jammed materials under shear.