EPJ Web Conf.
Volume 249, 2021Powders & Grains 2021 – 9th International Conference on Micromechanics on Granular Media
|Number of page(s)||4|
|Section||Fluids and Particles|
|Published online||07 June 2021|
On water waves generated by gravity driven granular collapse
Université Paris-Saclay, CNRS, Laboratoire FAST, F-91405 Orsay, France
2 University of California, Santa Barbara, Department of Mechanical Engineering, USA
Published online: 7 June 2021
Tsunami-like waves can arise from large-scale geological events such as the collapse of a mountain flank or a volcano into a lake or an ocean. We here mimic this situation at the laboratory scale. The landslide is modeled by the sudden release of a rectangular granular column, which impacts a still water layer and generates a wave. Through experiments varying both the column dimensions and the initial water depth, three regimes of nonlinear waves of different shapes are reported. The amplitude and width of the generated waves are governed by a local Froude number based on the velocity of the granular front at the water surface.
A video is available at https://doi.org/10.48448/qsmj-sk52
© The Authors, published by EDP Sciences, 2021
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