Journal article 735 views 161 downloads
Capillary bulldozing of sedimented granular material confined in a millifluidic tube
Guillaume Dumazer 
,
Bjornar Sandnes ,
Knut Jørgen Måløy ,
Eirik G. Flekkøy
,
Bjornar Sandnes ,
Knut Jørgen Måløy ,
Eirik G. Flekkøy
Physical Review Fluids, Volume: 5, Issue: 3
Swansea University Author:
Bjornar Sandnes
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DOI (Published version): 10.1103/physrevfluids.5.034309
Abstract
The motion of a capillary interface across a deformable granular material in a confined geometry shows the complex interplay between viscous forces, solid friction and capillary forces. In a horizontal quasi one-dimensional geometrical confinement, a millifluidic tube, the displacement of a three-ph...
| Published in: | Physical Review Fluids |
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| ISSN: | 2469-990X |
| Published: |
American Physical Society (APS)
2020
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa53645 |
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| Abstract: |
The motion of a capillary interface across a deformable granular material in a confined geometry shows the complex interplay between viscous forces, solid friction and capillary forces. In a horizontal quasi one-dimensional geometrical confinement, a millifluidic tube, the displacement of a three-phase flow consisting of two fluids and a mobile granular phase exhibits viscous or frictional displacement regimes, as shown in [{} 117 , 028002 (2016)]. In the present paper we explore in details the dynamics in both regimes by making use of a new set of data. The viscous displacement regime which is characterized by a fluidization of the immersed granular material dragged by the flow driving the displacement of the capillary interface is interpreted from a rheological point of view. The frictional displacement regime which displays a self-structuring of the granular material left in the tube behind the invading capillary interface, is interpreted with a model based on the Janssen’s law able to predict the typical size of the plugs obtained. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
3 |