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Updated: Jul 11, 2026

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
Published on: February 22, 2018
Eliminating segregation in free-surface flows of particles
Deliang Shi1, Adetola A Abatan, Watson L Vargas
1Department of Chemical and Petroleum Engineering University of Pittsburgh Pittsburgh, PA 15261, USA.
Abstract:
By introducing periodic flow inversions, we show both experimentally and computationally that forcing with a value above a critical frequency can effectively eliminate both density and size segregation. The critical frequency is related to the inverse of the characteristic time of segregation and is shown to scale with the shear rate of the particle flow. This observation could lead to new designs for a vast array of particle processing applications and suggests a new way for researchers to think about segregation problems.
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