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Pattern formation of frictional fingers in a gravitational potential / Jon Alm Eriksen; Renaud Toussaint; Knut Jørgen Måløy; Eirik Flekkøy; Olivier Galland; Bjørnar Sandnes

Physical Review Fluids, Volume: 3, Issue: 1

Swansea University Author: Sandnes, Bjornar

Abstract

Aligned finger structures, with a characteristic width, emerge during the slow drainage of a liquid-granular mixture in a tilted Hele-Shaw cell. A transition from vertical to horizontal alignment of the finger structures is observed as the tilting angle and the granular density are varied. An analyt...

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Published in: Physical Review Fluids
ISSN: 2469-990X
Published: 2018
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa37942
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Abstract: Aligned finger structures, with a characteristic width, emerge during the slow drainage of a liquid-granular mixture in a tilted Hele-Shaw cell. A transition from vertical to horizontal alignment of the finger structures is observed as the tilting angle and the granular density are varied. An analytical model is presented, demonstrating that the alignment properties are the result of the competition between fluctuating granular stresses and the hydrostatic pressure. The dynamics is reproduced in simulations. We also show how the system explains patterns observed in nature, created during the early stages of a dike formation.
College: College of Engineering
Issue: 1