Jet instability of a shear-thickening concentrated suspension

Maxime Liard , Akihiro Sato , Jérémy Sautel , Didier Lootens , Pascal Hébraud (1)

1 IPCMS - Institut de Physique et Chimie des Matériaux de Strasbourg

We investigate the flow of a concentrated suspension of colloidal particles at deformation rates higher than the discontinuous shear thickening transition shear rate. We show that, under its own weight, a jet of a concentrated enough colloidal suspension, simultaneously flows while it sustains tensile stress and transmits transverse waves. This results in a new flow instability of jets of shear-thickening suspensions: the jet is submitted to rapid transverse oscillations, that we characterize.

Mots clés: -key 82; 70; Dd --key 83; 60; Rs

Domaines: Physique [physics]

Maxime Liard, Akihiro Sato, Jérémy Sautel, Didier Lootens, Pascal Hébraud. Jet instability of a shear-thickening concentrated suspension. European Physical Journal E: Soft matter and biological physics, 2020, 43 (11), ⟨10.1140/epje/i2020-11994-3⟩. ⟨hal-03093091⟩