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Dispersion of particles by shear


IT is generally accepted that in the hydrodynamic dispersion of particles in liquids, shearing motions—including those produced in turbulent flows in which the viscous forces are dominant—play a central role. We draw attention here to the failure in existing theoretical treatments1 to recognise that there are profound differences in the efficacy of different kinds of shear, and specifically between simple (or transverse) and pure (or extensional) shears.

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KAO, S., MASON, S. Dispersion of particles by shear. Nature 253, 619–621 (1975).

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