Shear-induced migration in colloidal suspensions

: Marmet, Philip; Scacchi, Alberto; Brader, Joseph M.

Publisher: TAYLOR & FRANCIS LTD

: ABINGDON

: 2017

: Molecular Physics

: MOLECULAR PHYSICS

: MOL PHYS

: 115

: 14

: 1691

: 1699

: 9

: 0026-8976

: 1362-3028

DOI: https://doi.org/10.1080/00268976.2017.1323128

Using Brownian dynamics simulations, we perform a systematic investigation of the shear-induced migration of colloidal particles subject to Poiseuille flow in both cylindrical and planar geometry. We find that adding an attractive component to the interparticle interaction enhances the migration effect, consistent with recent simulation studies of platelet suspensions. Monodisperse, bidisperse and polydisperse systems are studied over a range of shear-rates, considering both steady-states and the transient dynamics arising from the onset of flow. For bidisperse and polydisperse systems, size segregation is observed.[GRAPHICS].