| Issue |
EPJ Web Conf.
Volume 140, 2017
Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media
|
|
|---|---|---|
| Article Number | 09016 | |
| Number of page(s) | 4 | |
| Section | Fluids and particles | |
| DOI | https://doi.org/10.1051/epjconf/201714009016 | |
| Published online | 30 June 2017 | |
https://doi.org/10.1051/epjconf/201714009016
Self-Structuring of Granular material under Capillary Bulldozing
1 Physics Department, University of Oslo, P. O. Box 1048 Blindern Oslo, Norway
2 College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, UK
3 Institut de Physique du Globe de Strasbourg, Université de Strasbourg/EOST, CNRS, 5 rue Descartes, F67084 Strasbourg Cedex, France
* e-mail: guillaume.dumazer@fys.uio.no
Published online: 30 June 2017
An experimental observation of the structuring of a granular suspension under the progress of a gas/liquid meniscus in a narrow tube is reported here. The granular material is moved and compactifies as a growing accumulation front. The frictional interaction with the confining walls increases until the pore capillary entry pressure is reached. The gas then penetrates the clogged granular packing and a further accumulation front is formed at the far side of the plug. This cyclic process continues until the gas/liquid interface reaches the tube’s outlet, leaving a trail of plugs in the tube. Such 1D pattern formation belongs to a larger family of patterning dynamics observed in 2D Hele-Shaw geometry. The cylindrical geometry considered here provides an ideal case for a theoretical modelling for forced granular matter oscillating between a long frictional phase and a sudden viscous fluidization.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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