Rheology of sedimenting particle pastes

Abdoulaye Fall*, Henri De Cagny, Daniel Bonn, Guillaume Ovarlez, Elie Wandersman, Joshua A. Dijksman, Martin Van Hecke

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)


We study the local and global rheology of non-Brownian suspensions in a solvent that is not density-matched, leading to either creaming or sedimentation of the particles. Both local and global measurements show that the incomplete density matching leads to the appearance of a critical shear rate above which the suspension is homogenized by the flow, and below which sedimentation or creaming happens. We show that the value of the critical shear rate and its dependence on the experimental parameters are governed by a competition between the viscous and the gravitational forces, and present a simple scaling model that agrees with the experimental results from different types of experiments (local and global) in different setups and systems.

Original languageEnglish
Pages (from-to)1237-1246
Number of pages10
JournalJournal of Rheology
Issue number4
Publication statusPublished - Jul 2013
Externally publishedYes


  • Creaming/sedimentation
  • MRI
  • Non-Brownian suspension
  • Rheology
  • Shear banding
  • Viscosity bifurcation


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