Shear-Induced Stress Relaxation in a Two-Dimensional Wet Foam

Details Shear-Induced Stress Relaxation in a Two-Dimensional Wet Foam Shear-Induced Stress Relaxation in a Two-Dimensional Wet Foam

2002-05-16

arxiv.org/abs/cond-mat/0205346v1

Phy. Rev. Lett v. 89, p. 098303 (2002)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1103/PhysRevLett.89.098303

We report on experimental measurements of the flow behavior of a wet, two-dimensional foam under conditions of slow, steady shear. The initial response of the foam is elastic. Above the yield strain, the foam begins to flow. The flow consists of irregular intervals of elastic stretch followed by sudden reductions of the stress, i.e. stress drops. We report on the distribution of the stress drops as a function of the applied shear rate. We also comment on our results in the context of various two-dimensional models of foams.

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