Shear-induced fractures and three-dimensional motions in an organogel

Details Shear-induced fractures and three-dimensional motions in an organogel Shear-induced fractures and three-dimensional motions in an organogel

2009-03-31

arxiv.org/abs/0903.5395v1

Phys. Rev. E 77, 011401 (2008)

Physics

Condensed Matter

Soft Condensed Matter

13 pages, 19 figures

Scientific paper

10.1103/PhysRevE.77.011401

The flow behavior of a viscoelastic organogel is investigated using ultrasonic velocimetry combined with rheometry. Our gel presents a decreasing flow curve, i.e., the measured stress decreases as a function of the applied shear rate. Strikingly, we note that the local flow curve calculated from the velocity profiles also exhibits a decreasing part. We attribute this regime to the presence of a fracturing process and three-dimensional motions in the bulk of the sample.

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