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dc.contributor.authorThorens, Louison
dc.contributor.authorMåløy, Knut Jørgen
dc.contributor.authorFlekkøy, Eirik Grude
dc.contributor.authorSandnes, Bjørnar
dc.contributor.authorBourgoin, Mickaël
dc.contributor.authorSantucci, Stephane F A
dc.identifier.citationSoft Matter. 2023, .en_US
dc.description.abstractNumerous natural and industrial processes involve the mixed displacement of liquids, gases and granular materials through confining structures. However, understanding such three-phase flows remains a formidable challenge, despite their tremendous economic and environmental impact. To unveil the complex interplay of capillary and granular stresses in such flows, we consider here a model configuration where a frictional fluid (an immersed sedimented granular layer) is slowly drained out of a horizontal capillary. Analyzing how liquid/air menisci displace particles from such granular beds, we reveal various drainage patterns, notably the periodic formation of dunes, analogous to road washboard instability. Considering the competitive role of friction and capillarity, a 2D theoretical approach supported by numerical simulations of a meniscus bulldozing a front of particles provides quantitative criteria for the emergence of those dunes. A key element is the strong increase of the frictional forces, as the bulldozed particles accumulate and bend the meniscus horizontally. Interestingly, this frictional enhancement with the attack angle is also crucial in small-legged animals' locomotion over granular media.en_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsNavngivelse-Ikkekommersiell 4.0 Internasjonal*
dc.titleCapillary washboarding during slow drainage of a frictional fluiden_US
dc.title.alternativeCapillary washboarding during slow drainage of a frictional fluiden_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.source.journalSoft Matteren_US
dc.relation.projectNorges forskningsråd: 262644en_US

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Navngivelse-Ikkekommersiell 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse-Ikkekommersiell 4.0 Internasjonal