
Squirmer paper in Journal of Fluid Mechanics
Our latest paper is a collaborative effort with Professor Takuji Ishikawa (Tohoku University, Japan) and Professor Tim Pedley (University of Cambridge, UK). In this study, published in Journal of Fluid Mechanics, dynamic simulations of a suspension of active particles in Poiseuille flow, situated between two parallel walls, were conducted by Stokesian dynamics assuming negligible inertia. While previous studies have reported negative viscosity of pusher suspensions, this study shows that the effective viscosity of bottom-heavy puller suspensions can be negative for Poiseuille upflow.
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