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Frictional fluid instabilities shaped by viscous forces

DAWANG ZHANG, James Campbell, Jon A. Eriksen, Eirik G. Flekkøy, Knut Jørgen Måløy Orcid Logo, Christopher W. MacMinn Orcid Logo, Bjornar Sandnes Orcid Logo

Nature Communications, Volume: 14, Issue: 1

Swansea University Authors: DAWANG ZHANG, James Campbell, Bjornar Sandnes Orcid Logo

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DOI (Published version): 10.1038/s41467-023-38648-6

Abstract

Multiphase flows involving granular materials are complex and prone to pattern formation causedby competing mechanical and hydrodynamic interactions. Here we study the interplay between granular bulldozing and the stabilizing effect of viscous pressure gradients in the invading fluid.Injection of aq...

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Published in: Nature Communications
ISSN: 2041-1723
Published: Springer Science and Business Media LLC 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa63392
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Abstract: Multiphase flows involving granular materials are complex and prone to pattern formation causedby competing mechanical and hydrodynamic interactions. Here we study the interplay between granular bulldozing and the stabilizing effect of viscous pressure gradients in the invading fluid.Injection of aqueous solutions into layers of dry, hydrophobic grains represent a viscously stable scenario where we observe a transition from growth of a single frictional finger to simultaneous growth of multiple fingers as viscous forces are increased. The pattern is made more compact by the internal viscous pressure gradient, ultimately resulting in a fully stabilized front of frictional fingers advancing as a radial spoke pattern.
Keywords: Applied physics, Chemical engineering, Civil engineering, Fluid dynamics
College: Faculty of Science and Engineering
Funders: We thank Miles Morgan, Deren Ozturk, Rowan Brown and Duncan Hewitt for discussions. This research was funded by the Engineering and Physical Sciences Research Council [EP/S034587/1] (BS, CWM); the European Research Council (ERC) under the European Union’s Horizon 2020 Programme [Grant No. 805469] (CWM); the China Scholarship Council (CSC) (DZ); and the Research Council of Norway through its Centres of Excellence funding scheme [262644] (EGF, KJM).
Issue: 1

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