Issue |
EPL
Volume 105, Number 3, February 2014
|
|
---|---|---|
Article Number | 34004 | |
Number of page(s) | 6 | |
Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
DOI | https://doi.org/10.1209/0295-5075/105/34004 | |
Published online | 27 February 2014 |
Tsunami generated by a granular collapse down a rough inclined plane
1 IRPHE, CNRS UMR 7342 - Aix-Marseille University - AMU - Ecole Centrale Marseille, France
2 Department of Mechanical and Aerospace Engineering, Princeton University - Princeton, NJ 08544, USA
Received: 7 November 2013
Accepted: 31 January 2014
In this letter, we experimentally investigate the collapse of initially dry granular media into water and the subsequent impulse waves. We systematically characterize the influence of the slope angle and the granular material on the initial amplitude of the generated leading wave and the evolution of its amplitude during the propagation. The experiments show that whereas the evolution of the leading wave during the propagation is well predicted by a solution of the linearized Korteweg-de Vries equation, the generation of the wave is more complicated to describe. Our results suggest that the internal properties of the granular media and the interplay with the surrounding fluid are important parameters for the generation of waves at low velocity impacts. Moreover, the amplitude of the leading wave reaches a maximum value at large slope angle. The runout distance of the collapse is also shown to be smaller in the presence of water than under totally dry conditions. This study provides a first insight into tsunamis generated by subaerial landslides at low Froude number.
PACS: 47.57.Gc – Granular flow / 92.10.hl – Tsunamis / 45.70.Ht – Avalanches
© EPLA, 2014
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.