Liard Maxime, Sato Akihiro, Sautel Jérémy, Lootens Didier, Hébraud Pascal
Université de Strasbourg, IPCMS/CNRS UMR 7504, 23 rue du Loess, 67034, Strasbourg, France.
Sika Technology AG, Tuffenwies 16, 8048, Zürich, Switzerland.
Eur Phys J E Soft Matter. 2020 Nov 16;43(11):69. doi: 10.1140/epje/i2020-11994-3.
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.
我们研究了胶体颗粒浓悬浮液在高于不连续剪切增稠转变剪切速率的变形速率下的流动情况。我们发现，在自身重力作用下，足够浓的胶体悬浮液射流在承受拉伸应力并传播横波的同时会发生流动。这导致了剪切增稠悬浮液射流出现一种新的流动不稳定性：射流会受到快速的横向振荡，我们对其进行了表征。
