Dynamical density functional theory analysis of the laning instability in sheared soft matter

Alberto Scacchi; Andrew J. Archer; Joseph M. Brader

doi:10.1103/physreve.96.062616

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arXiv · 1711.00662

Dynamical density functional theory analysis of the laning instability in sheared soft matter

Alberto Scacchi·Andrew J. Archer·Joseph M. Brader

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Abstract

Using dynamical density functional theory (DDFT) methods we investigate the laning instability of a sheared colloidal suspension. The nonequilibrium ordering at the laning transition is driven by non-affine particle motion arising from interparticle interactions. Starting from a DDFT which incorporates the non-affine motion, we perform a linear stability analysis that enables identification of the regions of parameter space where lanes form. We illustrate our general approach by applying it to a simple one-component fluid of soft penetrable particles.

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Alberto Scacchi, Andrew J. Archer, Joseph M. Brader. 2017-11-29. Dynamical density functional theory analysis of the laning instability in sheared soft matter. https://doi.org/10.1103/physreve.96.062616

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