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Makrand Kalyankar made the photographs above and below of non-Brownian spherical particles in a rotating cylinder completely filled with a water/glycerin solvent. Depending on the rate of rotation an amazing array of patterns are realized. Presently I am investigating a theory of non-equilibrium statistical mechanics to understand these patterns.

Recently, the work of Kalyankar, Matson, Tong and Ackerson was selected for the cover of the Journal of Fluid Mechanics.

Rotating Suspensions