Labyrinth patterns in confined granular-fluid systems

B. Sandnes; H. A. Knudsen; K. J. Måløy; E. G. Flekkøy

doi:10.1103/PhysRevLett.99.038001

Labyrinth patterns in confined granular-fluid systems

B. Sandnes^*, H. A. Knudsen, K. J. Måløy, E. G. Flekkøy

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

70 Citations (Scopus)

Abstract

A random, labyrinthine pattern emerges during slow drainage of a granular-fluid system in two-dimensional confinement. Compacted grains are pushed ahead of the fluid-air interface, which becomes unstable due to a competition between capillary forces and the frictional stress mobilized by grain-grain contact networks. We reproduce the pattern formation process in numerical simulations and present an analytical treatment that predicts the characteristic length scale of the labyrinth structure. The pattern length scale decreases with increasing volume fraction of grains in the system and increases with the system thickness.

Original language	English
Article number	038001
Journal	Physical Review Letters
Volume	99
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.99.038001
Publication status	Published - 17 Jul 2007

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Labyrinth patterns in confined granular-fluid systems

Abstract

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