Density-wave fronts on the brink of wet granular condensation

Titelangaben

Zippelius, Andreas ; Huang, Kai:
Density-wave fronts on the brink of wet granular condensation.
In: Scientific Reports. Bd. 7 (2017) . - 3613.
ISSN 2045-2322
DOI: https://doi.org/10.1038/s41598-017-03844-0

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Abstract

Density-wave fronts in a vibrofluidized wet granular layer undergoing a gas-liquid-like transition are investigated experimentally. The threshold of the instability is governed by the amplitude of the vertical vibrations. Fronts, which are curved into a spiral shape, propagate coherently along the circular rim of the container with leading edges. They are stable beyond a critical distance from the container center. Based on an analysis of the emerging time and length scales, we propose a model for the pattern formation by considering the competition between the time scale for the condensation of wet granular particles from a gas-like state and that of the energy injection resisting this process.