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Updated: Apr 23, 2026

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
Published on: May 20, 2014
Modeling the behavior of confined colloidal particles under shear flow
F E Mackay1, K Pastor, M Karttunen
1Department of Applied Mathematics, The University of Western Ontario, Ontario N6A 5B8, London, Canada. fmackay2@uwo.ca cdennist@uwo.ca.
Abstract:
We investigate the behavior of colloidal suspensions with different volume fractions confined between parallel walls under a range of steady shears. We model the particles using molecular dynamics (MD) with full hydrodynamic interactions implemented through the use of a lattice-Boltzmann (LB) fluid. A quasi-2d ordering occurs in systems characterized by a coexistence of coupled layers with different densities, order, and granular temperature. We present a phase diagram in terms of shear and volume fraction for each layer, and demonstrate that particle exchange between layers is required for entering the disordered phase.
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