Granular fingers in Hele-Shaw experiments

Details Granular fingers in Hele-Shaw experiments Granular fingers in Hele-Shaw experiments

2000-12-22

arxiv.org/abs/cond-mat/0012441v3

Physics

Condensed Matter

Statistical Mechanics

LaTeX, 7 pages, 5 figures

Scientific paper

Granular materials constitute an intermediate state of matter between fluids and solids. Here we investigate the pattern formation when a grain is displaced by another type of grain in a radial Hele-Shaw cell. We show that several morphologies can occur, ranging from rounded to fingered patterns, interconnected by a continuous crossover. Fourier analyses shows that, in contrast to the rounded patterns, the fingered shapes present mode selection.

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