Affordable Access

Modified Archimedes' principle predicts rising and sinking of intruders in sheared granular flows

Authors
  • Jing, Lu
  • Ottino, Julio M.
  • Lueptow, Richard M.
  • Umbanhowar, Paul B.
Type
Preprint
Publication Date
Jun 07, 2019
Submission Date
Jun 07, 2019
Source
arXiv
License
Green
External links

Abstract

We computationally determine the force on single spherical intruder particles in sheared granular flows as a function of particle size, particle density, shear rate, overburden pressure, and gravitational acceleration. The force scales similarly to, but deviates from, the buoyancy force predicted by Archimedes' principle. The deviation depends only on the intruder to bed particle size ratio, but not the density ratio or flow conditions. We propose a simple force model that successfully predicts whether intruders rise or sink, knowing only the size and density ratios, for a variety of flow configurations in physical experiments.

Report this publication

Statistics

Seen <100 times