Size-induced axial segregation of ellipsoids in a rotating drum

Siyuan He, Yuelei Wang, Zongyan Zhou, Jieqing Gan, Aibing Yu, David Pinson

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)

Abstract

Granular materials of different sizes and shapes in a rotating drum tend to segregate in the axial direction. In the past, extensive numerical studies have been conducted for spherical particles, showing the phenomenon of band formation. However, the axial size-induced segregation of non-spherical particles receives limited attention. In this work, we report an interesting finding of band formation for ellipsoidal particles with aspect ratio varying from 0.5 to 2.0. The results show that for ellipsoids, two weak bands appear in the vicinity of endwalls, indicating that low flowability of ellipsoids reduces the tendency of band formation. Moreover, for different shaped particles, small particles in the bands come from different regions. The results also illustrate that the radial size-induced segregation pattern develops quickly, with small particles located at the centre and then the small particles tend to migrate along the drum to form bands.

Original languageEnglish
Article number118490
Number of pages8
JournalPowder Technology
Volume422
DOIs
Publication statusPublished - 15 May 2023

Keywords

  • Axial segregation
  • Band formation
  • Ellipsoids
  • Radial segregation
  • Rotating drum

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