Continuum modelling of granular particle flow with inelastic inter-particle collisions

Y. Zhang*, JM Reese

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The kinetic theory of granular flow is a successful model for gas-solid flows. However, inelastic collisions between particles, among other mechanisms, cause agglomeration of particles, which may be the reason why undue sensitivity of the model to any slight inelasticity in inter-particle collisions has been seen previously. In contrast to a dry (i.e. no interstitial gas) granular system, this tendency to agglomerate in a gas driven two-phase system may be countered by the carrier gas turbulence. In this paper, a heuristic model for particle gas turbulence interaction is introduced within the scope of a generalized kinetic theory model which incorporates the carrier fluid effect on particulate stresses. The numerical results for the flow of granular particles in vertical pipes, which considers slightly inelastic inter-particle collisions, are in reasonably good agreement with published experimental data. Even in this relatively simple model, the results indicate that the interactions between the particle phase and gas turbulence need to be appropriately addressed in any kinetic theory based model for gas solid flows.

Original languageEnglish
Pages (from-to)483-488
Number of pages6
JournalChemical Engineering Research and Design
Volume81
Issue numberA4
Publication statusPublished - Apr 2003

Keywords

  • particle technology
  • gas-solid flow
  • two-fluid model
  • turbulence modulation
  • KINETIC THEORY
  • FLUIDIZED-BED
  • TURBULENT FLOWS
  • SOLIDS
  • COMBUSTION
  • PIPE
  • coupling

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