Erosion waves: transverse instabilities and fingering
arXiv:cond-mat/0507163 · doi:10.1209/epl/i2006-10174-9
Abstract
Two laboratory scale experiments of dry and under-water avalanches of non-cohesive granular materials are investigated. We trigger solitary waves and study the conditions under which the front is transversally stable. We show the existence of a linear instability followed by a coarsening dynamics and finally the onset of a fingering pattern. Due to the different operating conditions, both experiments strongly differ by the spatial and time scales involved. Nevertheless, the quantitative agreement between the stability diagram, the wavelengths selected and the avalanche morphology reveals a common scenario for an erosion/deposition process.
4 pages, 6 figures, submitted to PRL
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Cited by in corpus (7)
- Non-local rheology in dense granular flows -- Revisiting the concept of fluidity
- Rheological properties of dense granular flows
- Granular Rayleigh-Taylor Instability: Experiments and Simulations
- Transverse instability of dunes
- Initiation of granular surface flows in a narrow channel
- Avalanche statistics and time-resolved grain dynamics for a driven heap
- Model for erosion-deposition patterns