Shear-induced fractures and three-dimensional motions in an organogelReport as inadecuate

Shear-induced fractures and three-dimensional motions in an organogel - Download this document for free, or read online. Document in PDF available to download.

1 CRPP - Centre de recherches Paul Pascal 2 Phys-ENS - Laboratoire de Physique de l-ENS Lyon 3 LCOO - Laboratoire de chimie organique et organométallique 4 LOF - Laboratoire du Futur

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.

Keywords : Physical gels and microgels Material behavior Non-Newtonian fluid flows Acoustical measurements and instrumentation

Author: Pauline Grondin - Sébastien Manneville - Jean-Luc Pozzo - Annie Colin -



Related documents