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Suspensions of noncolloidal particles in yield stress fluids: Experimental and micromechanical approaches

  • Fabien Mahaut
  • , François Bertrand
  • , Philippe Coussot
  • , Xavier Chateau
  • , Guillaume Ovarlez
  • Université Paris-Est

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)

Abstract

We study experimentally and theoretically the behavior of suspensions of noncolloidal particles in yield stress fluids. We develop procedures and materials that allow focusing on the purely mechanical contribution of the particles to the yield stress fiuid behavior, allowing relating the macroscopic properties of these suspensions to the mechanical properties of the yield stress fluid and the particle volume fraction. We find that the elastic modulus/concentration relationship follows a Krieger-Dougherty law, and show that the yield stress/concentration relationship is related to the elastic modulus/concentration relationship through a very simple law, in agreement with a micromechanical analysis. We finally present evidence for shear-induced migration in the flows of these suspensions.

Original languageEnglish
Title of host publicationThe XVth International Congress on Rheology - The Society of Rheology 80th Annual Meeting
Pages671-673
Number of pages3
DOIs
Publication statusPublished - 11 Sept 2008
Externally publishedYes
Event15th International Congress on Rheology - Monterey, CA, United States
Duration: 3 Aug 20088 Aug 2008

Publication series

NameAIP Conference Proceedings
Volume1027
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference15th International Congress on Rheology
Country/TerritoryUnited States
CityMonterey, CA
Period3/08/088/08/08

Keywords

  • Elastic modulus
  • Micromechanical approach
  • Migration
  • Noncolloidal suspension
  • Yield stress

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