Jump to main content
Jump to site search

Issue 4, 2006
Previous Article Next Article

Yield stress and thixotropy: on the difficulty of measuring yield stresses in practice

Author affiliations

Abstract

The yield stress of many yield stress fluids has turned out to be difficult to determine experimentally. This has led to various discussions in the literature about those experimental difficulties, and the usefulness and pertinence of the concept of yield stress fluids. We argue here that most of the difficulties disappear when taking the thixotropy of yield stress fluids into account, and will demonstrate an experimental protocol that allows reproducible data to be obtained for the critical stress necessary for flow of these fluids. As a bonus, we will show that the interplay of yield stress and thixotropy allows one to account for the ubiquitous shear localization observed in these materials. However, due to the thixotropy the yield stress is no longer a material property, since it depends on the (shear) history of the sample.

Graphical abstract: Yield stress and thixotropy: on the difficulty of measuring yield stresses in practice

Back to tab navigation
Please wait while Download options loads

Publication details

The article was received on 15 Dec 2005, accepted on 27 Jan 2006, published on 17 Feb 2006 and first published online on 17 Feb 2006


Article type: Emerging Area
DOI: 10.1039/B517840A
Citation: Soft Matter, 2006,2, 274-283
  •   Request permissions

    Yield stress and thixotropy: on the difficulty of measuring yield stresses in practice

    P. C. F. Møller, J. Mewis and D. Bonn, Soft Matter, 2006, 2, 274
    DOI: 10.1039/B517840A

Search articles by author