Effect of moisture content on flowability: Angle of repose, tilting angle, and Hausner ratio

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Abstract

The angle of repose, angle of tilting, and Hausner ratio are frequently used to estimate the flowability of a particulate material. In this study, these factors were determined for 12 samples as a function of the moisture content. The measurements were thoroughly analyzed and indicate that the angle of tilting is the most appropriate for describing a material's response to moisture content. The flowability results clearly showed three types of materials according to their response to moisture content: solid particles, porous particles, and size-changing particles. A thorough analysis of various sizes of spherical solid particles enabled the identification of five zones from dry to fully immersed in water, and a zone map could be obtained. In addition, a model predicting flowability as a function of moisture content and Archimedes number could then be developed. Further experiments are required to relate the zone map and model to other types of materials.

Original languageEnglish
Pages (from-to)582-596
Number of pages15
JournalPowder Technology
Volume393
DOIs
StatePublished - 1 Nov 2021

Keywords

  • Angle of repose
  • Angle of tilting
  • Flowability
  • Hausner ratio
  • Moisture content

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