Shaken and stirred: Random organization reduces viscosity and dissipation in granular suspensions.

Christopher Ness, Romain Mari & Michael Cates
The viscosity of suspensions of large ($\geq\SI{10}{\micro\meter}$) particles diverges at high solid fractions due to proliferation of frictional particle contacts. Reducing friction, to allow or improve flowability, is usually achieved by tuning the composition, either changing particle sizes and shapes or by adding lubricating molecules. We present numerical simulations that demonstrate a complementary approach whereby the viscosity divergence is shifted by \emph{driven flow tuning}, using superimposed shear oscillations in various configurations to facilitate a primary...
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