Work

Dry granular collapse into a liquid: Role of viscous dissipation on granular flow regimes and associated waves

Year: 2024

Type: article

Abstract: During the generation of free-surface waves in landslide-tsunami modeling, the importance of grain-fluid interaction is still not well identified. To clarify this, the present study examines experimentally the role of viscous dissipation on the dynamics of dry granular masses collapsing into a liquid pool, by varying both the grain size and liquid viscosity. The experiments reveal a richness in granular collapse regimes, from dilute- and dense-inertial to dense-viscous regimes, that significantly influence the entire wave train, while having limited impact on the leading and largest wave.

Source: Physical Review Fluids

DOI: 10.1103/physrevfluids.9.124302

Authors: Alexis Bougouin, Sylvain Viroulet, Laurent Lacaze, Olivier Roche, Raphaël Paris

Institutions: University of Calabria, Institut de Mécanique des Fluides de Toulouse, Laboratoire Magmas et Volcans

Language: English

Topic: Earthquake and Tsunami Effects

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: Agence Nationale de la Recherche, Centre National de la Recherche Scientifique

Awards: CAP 20-25, Development of an integrated approach to reduce the risks associated with explosive volcanism, from hazards research to crisis management tools: Martinique case study, Clermont-Ferrand centre for research on volcanism