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Conference Paper/Proceeding/Abstract 1120 views

Modelling stick-slip dynamics in frictional fluids

Jon Alm Eriksen, Bjornar Sandnes Orcid Logo, Knut Jorgen Maloy, Eirik Grude Flekkoy

Geophysical Research Abstracts 15, EGU2013-14040, Volume: 15, Issue: 14040

Swansea University Author: Bjornar Sandnes Orcid Logo

Abstract

Dissipative interactions between grains often lead to instabilities and pattern formation in flows involving granularmaterials. This is especially so in wet granular flows, where viscous and capillary forces add to the complexdynamics. In a recent study we found an extraordinary diversity in the flo...

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Published in: Geophysical Research Abstracts 15, EGU2013-14040
Published: 2013
URI: https://cronfa.swan.ac.uk/Record/cronfa21350
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spelling 2016-08-04T14:11:57.8067791 v2 21350 2015-05-13 Modelling stick-slip dynamics in frictional fluids 61c7c04b5c804d9402caf4881e85234b 0000-0002-4854-5857 Bjornar Sandnes Bjornar Sandnes true false 2015-05-13 CHEG Dissipative interactions between grains often lead to instabilities and pattern formation in flows involving granularmaterials. This is especially so in wet granular flows, where viscous and capillary forces add to the complexdynamics. In a recent study we found an extraordinary diversity in the flow behaviour of wet granular materialdisplaced by air in a Hele-Shaw cell [1]. By varying the air injection rate, system compressibility, and granularmaterial filling fraction, several distinct flow morphologies were observed. The study maps these out in phasediagrams.Here we present a numerical model that focuses on one of the observed pattern transitions; from frictionalfingering to stick-slip bubbles. By incorporating surface tension, pressure and frictional forces, we trace thedisplacement of the interface using a dynamical version of a quasi-static algorithm developed previously [2]. Themodel reproduces the growth and evolution of the flow dynamics, resulting in patterns that closely resemble thoseobserved in the experiments. The numerical scheme offers a method to study the transition between the patternformation modes in detail, complementary to the experimental results. Conference Paper/Proceeding/Abstract Geophysical Research Abstracts 15, EGU2013-14040 15 14040 31 12 2013 2013-12-31 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University 2016-08-04T14:11:57.8067791 2015-05-13T10:56:17.5564543 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Jon Alm Eriksen 1 Bjornar Sandnes 0000-0002-4854-5857 2 Knut Jorgen Maloy 3 Eirik Grude Flekkoy 4
title Modelling stick-slip dynamics in frictional fluids
spellingShingle Modelling stick-slip dynamics in frictional fluids
Bjornar Sandnes
title_short Modelling stick-slip dynamics in frictional fluids
title_full Modelling stick-slip dynamics in frictional fluids
title_fullStr Modelling stick-slip dynamics in frictional fluids
title_full_unstemmed Modelling stick-slip dynamics in frictional fluids
title_sort Modelling stick-slip dynamics in frictional fluids
author_id_str_mv 61c7c04b5c804d9402caf4881e85234b
author_id_fullname_str_mv 61c7c04b5c804d9402caf4881e85234b_***_Bjornar Sandnes
author Bjornar Sandnes
author2 Jon Alm Eriksen
Bjornar Sandnes
Knut Jorgen Maloy
Eirik Grude Flekkoy
format Conference Paper/Proceeding/Abstract
container_title Geophysical Research Abstracts 15, EGU2013-14040
container_volume 15
container_issue 14040
publishDate 2013
institution Swansea University
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
document_store_str 0
active_str 0
description Dissipative interactions between grains often lead to instabilities and pattern formation in flows involving granularmaterials. This is especially so in wet granular flows, where viscous and capillary forces add to the complexdynamics. In a recent study we found an extraordinary diversity in the flow behaviour of wet granular materialdisplaced by air in a Hele-Shaw cell [1]. By varying the air injection rate, system compressibility, and granularmaterial filling fraction, several distinct flow morphologies were observed. The study maps these out in phasediagrams.Here we present a numerical model that focuses on one of the observed pattern transitions; from frictionalfingering to stick-slip bubbles. By incorporating surface tension, pressure and frictional forces, we trace thedisplacement of the interface using a dynamical version of a quasi-static algorithm developed previously [2]. Themodel reproduces the growth and evolution of the flow dynamics, resulting in patterns that closely resemble thoseobserved in the experiments. The numerical scheme offers a method to study the transition between the patternformation modes in detail, complementary to the experimental results.
published_date 2013-12-31T03:25:18Z
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score 11.016392

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