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Pré-Publication, Document De Travail Année : 2019

The Darcytron: a pressure-imposed device to probe the frictional transition in shear-thickening suspensions

Cécile Clavaud
Bloen Metzger

Résumé

In this paper, we present a new device called the Darcytron, allowing pressure-imposed rheological measurements on dense suspensions made of very small particles, like shear-thickening suspensions. The main idea is to impose and control the particle pressure using a vertical Darcy flow across the settled bed of particles. We first validate the proof of concept of the Darcytron on a standard (non shear-thickening) suspension composed of large glass particles. We then use this new device to investigate the frictional behavior of a model shear-thickening suspension composed of small silica particles. These results provide direct evidence of a transition between a frictionless and a frictional state as the particle pressure is increased, providing support to the recent frictional transition scenario for shear thickening.
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Dates et versions

hal-02351663 , version 1 (06-11-2019)
hal-02351663 , version 2 (08-01-2021)

Identifiants

  • HAL Id : hal-02351663 , version 1

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Cécile Clavaud, Bloen Metzger, Yoel Forterre. The Darcytron: a pressure-imposed device to probe the frictional transition in shear-thickening suspensions. 2019. ⟨hal-02351663v1⟩
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