Oldroyd's model and the foundation of modern rheology of yield stress fluids

Philippe Coussot, Simon A. Rogers

Research output: Contribution to journalArticlepeer-review

Abstract

Oldroyd's 1946 formulation of the constitutive equation of yield stress fluids laid the foundation of modern rheology of yield stress fluids, by considering not just the simple shear behavior of yield-stress fluids in the plastic regime, but also by prescribing a simple expression for how they behave prior to yielding and a 3D expression for how they behave beyond yielding. We discuss the implications of Oldroyd's model, and the ways in which researchers have tested and refined his ideas. We also review the experimental methods that have been employed to test these implications, and to determine the rheological parameters it lays out. We finally discuss the impact of Oldroyd's model, and the future of investigations into what happens prior to yielding.

Original languageEnglish (US)
Article number104604
JournalJournal of Non-Newtonian Fluid Mechanics
Volume295
DOIs
StatePublished - Sep 2021

Keywords

  • Elasticity
  • Models
  • Recovery tests
  • Yield stress fluids

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering
  • Applied Mathematics

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