Combined effects of internal friction and bed height on the Brazil-nut problem in a shaker

Chun Chung Liao, Shu San Hsiau, Chi Sou Wu

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We experimentally studied the influence of an intruder's friction coefficient and bed-filling height on the Brazil-nut effect in a quasi-2D vertical vibration granular bed. The motion of intruder was successfully measured using a high-speed camera and the rising time of intruder was determined by using a particle tracking method with the help of image processing technology. The results show that an intruder's friction coefficient and filling bed height play significant roles in the rise dynamics. The results also show that the rise time increases when the intruder's friction coefficient increases, which is reduced when the filling bed height decreases. Penetration length and friction drag force were also determined in this study. The penetration length was reduced and the friction drag force was enhanced with the increase of an intruder's friction coefficient and bed height. Additionally, the variation between the rise times of the smooth and rough intruders was not significant with the lower bed-filling heights.

Original languageEnglish
Pages (from-to)561-567
Number of pages7
JournalPowder Technology
Volume253
DOIs
StatePublished - Feb 2014

Keywords

  • Brazil-nut problem
  • Friction drag force
  • Granular material
  • Penetration length
  • Vibration bed

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