Segregation forces in dense granular flows: Closing the gap between single intruders and mixtures

Yifei Duan, Lu Jing, Paul B. Umbanhowar, Julio M. Ottino, Richard M. Lueptow*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Using simulations and a virtual-spring-based approach, we measure the segregation force, in size-bidisperse sphere mixtures over a range of concentrations, particle-size ratios and shear rates to develop a semiempirical model for that extends its applicability from the well-studied non-interacting intruders regime to finite-concentration mixtures where cooperative phenomena occur. The model predicts the concentration below which the single-intruder assumption applies and provides an accurate description of the pressure partitioning between species.

Original languageEnglish (US)
Article numberA244
JournalJournal of fluid Mechanics
Volume935
DOIs
StatePublished - Mar 25 2022

Keywords

  • dry granular material

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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