Phys. Rev. Lett. 93, 046001 (2004) [4 pages]Shear-Induced Configurations of Confined Colloidal SuspensionsReceived 10 January 2004; published 23 July 2004 We show that geometric confinement dramatically affects the shear-induced configurations of dense monodisperse colloidal suspensions; a new structure emerges, where layers of particles buckle to stack in a more efficient packing. The volume fraction in the shear zone is controlled by a balance between the viscous stresses and the osmotic pressure of a contacting reservoir of unsheared particles. We present a model that accounts for our observations and helps elucidate the complex interplay between particle packing and shear stress for confined suspensions. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.046001
DOI:
10.1103/PhysRevLett.93.046001
PACS:
83.10.Tv, 47.54.+r, 82.70.Dd, 83.85.Ei
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