Work

Stripes in granular avalanches: how segregation couples with vortices

Year: 2026

Type: article

Abstract: Pearse et al. ( J. Fluid Mech. vol. 1032, 2026, A4) reveal that a novel segregation pattern emerges when mixtures of large and small particles flow rapidly down a slope. Regular longitudinal stripes of large particles are observed, arising from the coupling between longitudinal vortices and vertical segregation processes. Pearse et al. derive a simple yet insightful model capturing the segregation dynamics.

Source: Journal of Fluid Mechanics

DOI: 10.1017/jfm.2026.11587

Author: Olivier Pouliquen

Institutions: Centre National de la Recherche Scientifique, Aix-Marseille Université, Institut Universitaire des Systèmes Thermiques Industriels

Language: English

Topic: Granular flow and fluidized beds

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funder: HORIZON EUROPE European Research Council

Award: Cohesion in Particulate media