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Compaction of granular material inside confined geometries

Benjy Marks, Bjørnar Sandnes, Guillaume Dumazer, Jon A. Eriksen, Knut J. Måløy, Bjornar Sandnes Orcid Logo

Frontiers in Physics, Volume: 3

Swansea University Author: Bjornar Sandnes Orcid Logo

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DOI (Published version): 10.3389/fphy.2015.00041

Abstract

In both nature and engineering, loosely packed granular materials are often compacted inside confined geometries. Here, we explore such behaviour in a quasi-two dimensional geometry, where parallel rigid walls provide the confinement. We use the discrete element method to investigate the stress dist...

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Published in: Frontiers in Physics
ISSN: 2296-424X
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa21489
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spelling 2019-06-03T11:14:29.8413678 v2 21489 2015-05-18 Compaction of granular material inside confined geometries 61c7c04b5c804d9402caf4881e85234b 0000-0002-4854-5857 Bjornar Sandnes Bjornar Sandnes true false 2015-05-18 CHEG In both nature and engineering, loosely packed granular materials are often compacted inside confined geometries. Here, we explore such behaviour in a quasi-two dimensional geometry, where parallel rigid walls provide the confinement. We use the discrete element method to investigate the stress distribution developed within the granular packing as a result of compaction due to the displacement of a rigid piston. We observe that the stress within the packing increases exponentially with the length of accumulated grains, and show an extension to current analytic models which fits the measured stress. The micromechanical behaviour is studied for a range of system parameters, and the limitations of existing analytic models are described. In particular, we show the smallest sized systems which can be treated using existing models. Additionally, the effects of increasing piston rate, and variations of the initial packing fraction, are described. Journal Article Frontiers in Physics 3 2296-424X Granular materials, DEM, Janssen effect, Force chains 9 6 2015 2015-06-09 10.3389/fphy.2015.00041 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University 2019-06-03T11:14:29.8413678 2015-05-18T13:34:38.7638069 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Benjy Marks 1 Bjørnar Sandnes 2 Guillaume Dumazer 3 Jon A. Eriksen 4 Knut J. Måløy 5 Bjornar Sandnes 0000-0002-4854-5857 6 0021489-03062019111323.pdf 21489.pdf 2019-06-03T11:13:23.6730000 Output 3558528 application/pdf Version of Record true 2019-06-02T00:00:00.0000000 Released under the terms of a Creative Commons Attribution License (CC-BY). true eng
title Compaction of granular material inside confined geometries
spellingShingle Compaction of granular material inside confined geometries
Bjornar Sandnes
title_short Compaction of granular material inside confined geometries
title_full Compaction of granular material inside confined geometries
title_fullStr Compaction of granular material inside confined geometries
title_full_unstemmed Compaction of granular material inside confined geometries
title_sort Compaction of granular material inside confined geometries
author_id_str_mv 61c7c04b5c804d9402caf4881e85234b
author_id_fullname_str_mv 61c7c04b5c804d9402caf4881e85234b_***_Bjornar Sandnes
author Bjornar Sandnes
author2 Benjy Marks
Bjørnar Sandnes
Guillaume Dumazer
Jon A. Eriksen
Knut J. Måløy
Bjornar Sandnes
format Journal article
container_title Frontiers in Physics
container_volume 3
publishDate 2015
institution Swansea University
issn 2296-424X
doi_str_mv 10.3389/fphy.2015.00041
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 1
active_str 0
description In both nature and engineering, loosely packed granular materials are often compacted inside confined geometries. Here, we explore such behaviour in a quasi-two dimensional geometry, where parallel rigid walls provide the confinement. We use the discrete element method to investigate the stress distribution developed within the granular packing as a result of compaction due to the displacement of a rigid piston. We observe that the stress within the packing increases exponentially with the length of accumulated grains, and show an extension to current analytic models which fits the measured stress. The micromechanical behaviour is studied for a range of system parameters, and the limitations of existing analytic models are described. In particular, we show the smallest sized systems which can be treated using existing models. Additionally, the effects of increasing piston rate, and variations of the initial packing fraction, are described.
published_date 2015-06-09T03:25:30Z
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score 11.036837

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