Shear-induced fractures and three-dimensional motions in an organogel.
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.
Grondin
Pauline
P
Centre de Recherche Paul Pascal, Université Bordeaux I, UPR CNRS 8641, Avenue Schweitzer, F-33600 Pessac, France.
Manneville
Sébastien
S
Pozzo
Jean-Luc
JL
Colin
Annie
A