Experimental investigations for the effect of fine powders on size-induced segregation in binary granular mixtures

Yun Chi Chung, Chun Chung Liao, Zhi Hao Zhuang

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This paper presents experimental investigations on the size-induced segregation behavior of binary granular mixtures in a rotating drum by adding a small amount of fine powders. Four different fine powder contents were selected, and three different rotation speeds were adopted. Experimental results reveal that the flowability of granular mixtures can be enhanced by a lubrication effect induced by a proper amount of fine powders. The segregation index and rate increase with the increasing fine powder content and rotation speed. The local-ensemble average velocity and granular temperature for large main particles also increase with the increase of fine powder content and rotation speed. The increase of fine powder content provides stronger lubrication effects, and the increase of rotation speed offers more energy into the granular mixtures. The dynamic properties proposed herein can characterize the size-induced granular segregation behavior. The increasing fine powder content and rotation speed facilitate size-induced granular segregation.

Original languageEnglish
Pages (from-to)270-276
Number of pages7
JournalPowder Technology
Volume387
DOIs
StatePublished - Jul 2021

Keywords

  • Fine powders
  • Granular flows
  • Lubrication effect
  • Rotating drum
  • Segregation rate
  • Size segregation

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