From Darcy to Gaussian to fully mobilised grain flow in a confined channel

Morgan, Miles; Sandnes, Bjornar

doi:10.1051/epjconf/202124903041

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From Darcy to Gaussian to fully mobilised grain flow in a confined channel

Miles Morgan, Bjornar Sandnes

EPJ Web of Conferences, Volume: 249

Swansea University Authors: Miles Morgan, Bjornar Sandnes

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DOI (Published version): 10.1051/epjconf/202124903041

Abstract

Fluid-driven grain flow through a confined channel filled with non-buoyant grains is herein observed to exist in three regimes according to total imposed flow rate. (1) At low imposed flow rates, no grain flow occurs as the fluid stress is insufficient to mobilise the grains and Darcy flow is observ...

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Published in:	EPJ Web of Conferences
ISSN:	2100-014X
Published:	EDP Sciences 2021
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URI:	https://cronfa.swan.ac.uk/Record/cronfa60829
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first_indexed	2022-08-16T12:57:19Z
last_indexed	2023-01-13T19:21:15Z
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spelling	2022-08-16T13:59:12.0557980 v2 60829 2022-08-16 From Darcy to Gaussian to fully mobilised grain flow in a confined channel 74c1257d35ba8de6402ca451aab305a1 Miles Morgan Miles Morgan true false 61c7c04b5c804d9402caf4881e85234b 0000-0002-4854-5857 Bjornar Sandnes Bjornar Sandnes true false 2022-08-16 CHEG Fluid-driven grain flow through a confined channel filled with non-buoyant grains is herein observed to exist in three regimes according to total imposed flow rate. (1) At low imposed flow rates, no grain flow occurs as the fluid stress is insufficient to mobilise the grains and Darcy flow is observed. (2) At a sufficient imposed flow rate, grains begin to flow at the top of the channel with self-similar Gaussian velocity profiles that become faster and encroach deeper into the channel with increased flow rate. (3) At high flow rates, significant grain flow occurs at the base of the channel, distorting the Gaussian profile, resulting in a gradual transition towards a more symmetric, full-channel flow. Each regime, and the transitions between them, is discussed in relation to experimental grain velocity measurements. Journal Article EPJ Web of Conferences 249 EDP Sciences 2100-014X 7 6 2021 2021-06-07 10.1051/epjconf/202124903041 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University This work was supported by the Engineering and Physical Sciences Research Council EPSRC grant EP/S034587/1. 2022-08-16T13:59:12.0557980 2022-08-16T13:54:37.2971171 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Miles Morgan 1 Bjornar Sandnes 0000-0002-4854-5857 2 60829__24933__eeb382a8521744de821135da744fd837.pdf 60829.pdf 2022-08-16T13:57:39.1901944 Output 6366137 application/pdf Version of Record true © The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 true eng http://creativecommons.org/licenses/by/4.0/
title	From Darcy to Gaussian to fully mobilised grain flow in a confined channel
spellingShingle	From Darcy to Gaussian to fully mobilised grain flow in a confined channel Miles Morgan Bjornar Sandnes
title_short	From Darcy to Gaussian to fully mobilised grain flow in a confined channel
title_full	From Darcy to Gaussian to fully mobilised grain flow in a confined channel
title_fullStr	From Darcy to Gaussian to fully mobilised grain flow in a confined channel
title_full_unstemmed	From Darcy to Gaussian to fully mobilised grain flow in a confined channel
title_sort	From Darcy to Gaussian to fully mobilised grain flow in a confined channel
author_id_str_mv	74c1257d35ba8de6402ca451aab305a1 61c7c04b5c804d9402caf4881e85234b
author_id_fullname_str_mv	74c1257d35ba8de6402ca451aab305a1_*_Miles Morgan 61c7c04b5c804d9402caf4881e85234b_*_Bjornar Sandnes
author	Miles Morgan Bjornar Sandnes
author2	Miles Morgan Bjornar Sandnes
format	Journal article
container_title	EPJ Web of Conferences
container_volume	249
publishDate	2021
institution	Swansea University
issn	2100-014X
doi_str_mv	10.1051/epjconf/202124903041
publisher	EDP Sciences
college_str	Faculty of Science and Engineering
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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
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description	Fluid-driven grain flow through a confined channel filled with non-buoyant grains is herein observed to exist in three regimes according to total imposed flow rate. (1) At low imposed flow rates, no grain flow occurs as the fluid stress is insufficient to mobilise the grains and Darcy flow is observed. (2) At a sufficient imposed flow rate, grains begin to flow at the top of the channel with self-similar Gaussian velocity profiles that become faster and encroach deeper into the channel with increased flow rate. (3) At high flow rates, significant grain flow occurs at the base of the channel, distorting the Gaussian profile, resulting in a gradual transition towards a more symmetric, full-channel flow. Each regime, and the transitions between them, is discussed in relation to experimental grain velocity measurements.
published_date	2021-06-07T04:19:16Z
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score	11.036684

From Darcy to Gaussian to fully mobilised grain flow in a confined channel

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