Couette flows with a bimodal particle mixture

Xue Liu, Stephen L. Conway, Benjamin J. Glasser

Research output: Contribution to conferencePaperpeer-review


Controlling unwanted segregation of components within a particle mixture is a longstanding goal in particle processing technologies. In this paper, we investigate the steady state solutions of Couette granular flows with a bi-disperse particle mixture using kinetic theory. Two continuum models are examined to study the effect of the equipartition of granular energy. The segregation of total particles and each individual particle species is enhanced when the effect of non-equipartition of granular energy is considered. The segregation between two particle species is due to the competition of three diffusion forces, the thermal diffusion force, the ordinary diffusion force and the pressure diffusion force. We compare the simulation results from binary kinetic theory with those from particle dynamic simulations. Results compare favorably except one exception. A transition of solids species segregation is observed in particle dynamic simulation when the two particle species have equal density. This flux reversal is not captured using the kinetic theory model.

Original languageEnglish (US)
StatePublished - 2006
Event2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology - Orlando, FL, United States
Duration: Apr 23 2006Apr 27 2006


Other2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology
Country/TerritoryUnited States
CityOrlando, FL

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Chemistry(all)


  • Binary particle mixture
  • Couette Flow
  • Equipartition of granular energy
  • Inelasticity
  • Segregation


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