Mixing of granular material in a drum mixer undergoing rotational and rocking motions II. Segregating particles

Carolyn Wightman, Fernando J. Muzzio

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

This study examines mixtures of particles of unequal sizes in a cylindrical drum both for pure rotation and rotation with vertical rocking. These motions generate mixtures with complex patterns. Such structures are frozen in situ, sliced, and characterized quantitatively using image analysis. For short times, segregation patterns observed in these experiments differ from those anticipated from previous studies in the literature; the large particles tend to concentrate in segregated cores. For long times, the larger particles migrate to the ends of the cylinder, approaching the more commonly observed banding segregation patterns. Under some conditions, near- homogeneous structures are generated, but such systems are meta-stable; additional mixing time results in a more strongly segregated system.

Original languageEnglish (US)
Pages (from-to)125-134
Number of pages10
JournalPowder Technology
Volume98
Issue number2
DOIs
StatePublished - Aug 1 1998

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

Keywords

  • Drum mixer
  • Granular material
  • Rocking motion
  • Rotational motion
  • Segregation patterns

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