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Pattern formation by injection of air in a non-Brownian suspension

C. Chevalier·A. Lindner·E. Clement
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Abstract

We study the injection of air in a granular suspension. We use a linear Hele-Saw cell filled with a suspension which is displaced by air, leading to a Saffman-Taylor (fingering) instability. For the suspension, we use an iso-dense mixture where the fluid and the particles have the same density. The volume fraction of particles can thus be adjusted over a wide range. We discuss the question of an effective rheology inside the cell as well as the pattern formation as a function of the granular compacity. We finally report results on the finger width for stable fingers and the thresholds for their destabilization.

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C. Chevalier, A. Lindner, E. Clement. 2005-04-29. Pattern formation by injection of air in a non-Brownian suspension. https://arxiv.org/abs/cond-mat/0504783

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