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

Abstract : 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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Submitted on : Thursday, October 14, 2010 - 9:48:51 AM
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Pauline Grondin, Sébastien Manneville, Jean-Luc Pozzo, Annie Colin. Shear-induced fractures and three-dimensional motions in an organogel. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, American Physical Society, 2008, 77 (1), pp.11401. ⟨10.1103/PhysRevE.77.011401⟩. ⟨ensl-00526126⟩



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