| Issue |
EPJ Web Conf.
Volume 140, 2017
Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media
|
|
|---|---|---|
| Article Number | 03080 | |
| Number of page(s) | 4 | |
| Section | Granular flow | |
| DOI | https://doi.org/10.1051/epjconf/201714003080 | |
| Published online | 30 June 2017 | |
https://doi.org/10.1051/epjconf/201714003080
Acoustic monitoring of a ball sinking in vibrated granular sediments
Institut Langevin, ESPCI Paris, PSL Research University, CNRS, 1 rue Jussieu, 75005 Paris, France
* Currently at Laboratoire Magmas et Volcans, Université B. Pascal, 63178 Aubière, France
† Corresponding author: xiaoping.jia@espci.fr
Published online: 30 June 2017
We develop an ultrasound probing to investigate the dynamics of a high density ball sinking in 3D opaque dense granular suspensions under horizontal weak vibrations. We show that the motion of the ball in these horizontally vibrated glass bead packings saturated by water is consistent with the frictional rheology. The extracted stress-strain relation evidences an evolution of flow behaviour from frictional creep to inertial regimes. Our main finding is that weak external vibration primarily affects the yield stress and controls the depth of sinking via vibration-induced sliding at the grain contact. Also, we observe that the extracted rheological parameters depend on the size of the probing ball, suggesting thus a non-local rheology.
© The Authors, published by EDP Sciences, 2017
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