2019/06/02 by Mohammad Sarabian, Mohammadhossein Firouznia, Bloen Metzger +1 · 1 citation
Physics and Astronomy · #cond-mat.soft #physics.flu-dyn
paper · pdf · doi:10.1017/jfm.2018.982
published as Journal of Fluid Mechanics., vol. 862, 2019, pp. 659-671 · 12 pages, 6 figures
arxiv created 2019/06/02 · arxiv updated 2019/06/10
We experimentally investigate particle migration in a non-Brownian suspension sheared in a Taylor-Couette configuration and in the limit of vanishing Reynolds number. Highly resolved index-matching techniques are used to measure the local particulate volume fraction. In this wide-gap Taylor-Couette configuration, we find that for a large range of bulk volume fraction, ϕb ∈ [20% - 50%], the fully developed concentration profiles are well predicted by the suspension balance model of Nott & Brady (J. Fluid Mech., vol. 275, 1994, pp. 157-199). Moreover, we provide systematic measurements of the migration strain scale and of the migration amplitude which highlight the limits of the suspension balance model predictions.