Experimentally validated computations of flow, mixing and segregation of non-cohesive grains in 3D tumbling blenders

Research output: Contribution to journalArticlepeer-review

159 Scopus citations

Abstract

Granular mixing is a vital operation in food, chemical, and pharmaceutical industries. Although the tumbling blender is by far the most common device used to mix grains, surprisingly little is known about mixing or segregation in these devices. In this paper, we report the first fully three-dimensional (3D) particle dynamics simulations of granular dynamics in two standard industrial tumbling blender geometries: the double-cone and the V-blender. Simulations for both monodisperse and bidisperse (segregating) grain sizes are performed and compared with experiment. Mixing and transport patterns are studied, and we find in both tumblers that the dominant mixing mechanism, azimuthal convection, contends against the dominant bottleneck, axial dispersion. The dynamics of blending, on the other hand, differs dramatically between the two tumblers: flow in the double-cone is nearly continuous and steady, while flow in the V-blender is intermittent and consists of two very distinct processes. (C) 2000 Elsevier Science S.A.

Original languageEnglish (US)
Pages (from-to)58-71
Number of pages14
JournalPowder Technology
Volume109
Issue number1-3
DOIs
StatePublished - Apr 3 2000

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

Keywords

  • Granular
  • Mixing
  • Simulation
  • Tumblers

Fingerprint Dive into the research topics of 'Experimentally validated computations of flow, mixing and segregation of non-cohesive grains in 3D tumbling blenders'. Together they form a unique fingerprint.

Cite this