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Ottino J.M., DeRoussel P., Hansen S. and Khakhar D.V. Mixing and Dispersion of Viscous Liquids and Powdered Solids
Department of Chemical Engineering, Northweste University, Evanston, IL 60208-3120
November 6, 1997, Submitted to Advances in Chemical Engineering.

Mixing and dispersion of viscous fluids -- blending in the polymer processing literature -- is the result of complex interaction between flow and events occurring at drop length-scales: breakup, coalescence and hydrodynamic interactions. Similarly, mixing and dispersion of powdered solids in viscous liquids is the result of complex interaction between flow and events -- erosion, fragmentation and aggregation -- occurring at agglomerate length scales. Important applications of these processes include the compounding of molten polymers, and the dispersion of fine particles in polymer melts. Reynolds numbers in both cases are small, even more so given the small length scales that dominate the processes.
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