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Updated: May 22, 2026

Studying Large Amplitude Oscillatory Shear Response of Soft Materials
Published on: April 25, 2019
Microscale rheology of a soft glassy material close to yielding
Pierre Jop1, Vincent Mansard, Pinaki Chaudhuri
1Université Bordeaux 1, Rhodia Laboratoire du Futur, Unité mixte Rhodia-CNRS, Université Bordeaux I, UMR 5258, Bordeaux, France.
Abstract:
Using confocal microscopy, we study the flow of a model soft glassy material: a concentrated emulsion. We demonstrate the micro-macro link between in situ measured movements of droplets during the flow and the macroscopic rheological response of a concentrated emulsion, in the form of scaling relationships connecting the rheological "fluidity" with local standard deviation of the strain-rate tensor. Furthermore, we measure correlations between these local fluctuations, thereby extracting a correlation length which increases while approaching the yielding transition, in accordance with recent theoretical predictions.
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