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A two-dimensional double layer-averaged model of hyperconcentrated turbidity currents with non-Newtonian rheology

Yining Sun, Ji Li Orcid Logo, Zhixian Cao Orcid Logo, Alistair George Liam Borthwick Orcid Logo

International Journal of Sediment Research, Volume: 38, Issue: 6, Pages: 794 - 810

Swansea University Author: Ji Li Orcid Logo

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DOI (Published version): 10.1016/j.ijsrc.2023.08.002

Abstract

Hyperconcentrated turbidity currents typically display non-Newtonian characteristics that influence sediment transport and morphological evolution in alluvial rivers. However, hydro-sediment-morphological processes involving hyperconcentrated turbidity currents are poorly understood, with little kno...

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Published in: International Journal of Sediment Research
ISSN: 1001-6279
Published: Elsevier BV 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa64107
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spelling v2 64107 2023-08-23 A two-dimensional double layer-averaged model of hyperconcentrated turbidity currents with non-Newtonian rheology 4123c4ddbcd6e77f580974c661461c7c 0000-0003-4328-3197 Ji Li Ji Li true false 2023-08-23 CIVL Hyperconcentrated turbidity currents typically display non-Newtonian characteristics that influence sediment transport and morphological evolution in alluvial rivers. However, hydro-sediment-morphological processes involving hyperconcentrated turbidity currents are poorly understood, with little known about the effect of the non-Newtonian rheology. The current paper extends a recent two-dimensional double layer-averaged model to incorporate non-Newtonian constitutive relations. The extended model is benchmarked against experimental and numerical data for cases including subaerial mud flow, subaqueous debris flow, and reservoir turbidity currents. The computational results agree well with observations for the subaerial mud flow and independent numerical simulations of subaqueous debris flow. Differences between the non-Newtonian and Newtonian model results become more pronounced in terms of propagation distance and sediment transport rate as sediment concentration increases. The model is then applied to turbidity currents in the Guxian Reservoir planned for middle Yellow River, China, which connects to a tributary featuring hyperconcentrated sediment-laden flow. The non-Newtonian model predicts slower propagation of turbidity currents and more significant bed aggradation at the confluence between the tributary Wuding River and the Yellow River in the reservoir than its Newtonian counterpart. This difference in model performance could be of considerable importance when optimizing reservoir operation schemes. Journal Article International Journal of Sediment Research 38 6 794 810 Elsevier BV 1001-6279 Double layer-averaged model, Non-Newtonian rheology, Mud flow, Reservoir turbidity current, Yellow River 31 12 2023 2023-12-31 10.1016/j.ijsrc.2023.08.002 http://dx.doi.org/10.1016/j.ijsrc.2023.08.002 COLLEGE NANME Civil Engineering COLLEGE CODE CIVL Swansea University This research has been funded by the National Natural Science Foundation of China under Grant No. 12072244. 2023-11-02T16:31:23.7059306 2023-08-23T09:23:33.4257327 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering Yining Sun 1 Ji Li 0000-0003-4328-3197 2 Zhixian Cao 0000-0001-5161-385x 3 Alistair George Liam Borthwick 0000-0001-6053-7764 4 Under embargo Under embargo 2023-08-23T09:26:16.9676606 Output 5571229 application/pdf Proof true 2024-08-21T00:00:00.0000000 false eng
title A two-dimensional double layer-averaged model of hyperconcentrated turbidity currents with non-Newtonian rheology
spellingShingle A two-dimensional double layer-averaged model of hyperconcentrated turbidity currents with non-Newtonian rheology
Ji Li
title_short A two-dimensional double layer-averaged model of hyperconcentrated turbidity currents with non-Newtonian rheology
title_full A two-dimensional double layer-averaged model of hyperconcentrated turbidity currents with non-Newtonian rheology
title_fullStr A two-dimensional double layer-averaged model of hyperconcentrated turbidity currents with non-Newtonian rheology
title_full_unstemmed A two-dimensional double layer-averaged model of hyperconcentrated turbidity currents with non-Newtonian rheology
title_sort A two-dimensional double layer-averaged model of hyperconcentrated turbidity currents with non-Newtonian rheology
author_id_str_mv 4123c4ddbcd6e77f580974c661461c7c
author_id_fullname_str_mv 4123c4ddbcd6e77f580974c661461c7c_***_Ji Li
author Ji Li
author2 Yining Sun
Ji Li
Zhixian Cao
Alistair George Liam Borthwick
format Journal article
container_title International Journal of Sediment Research
container_volume 38
container_issue 6
container_start_page 794
publishDate 2023
institution Swansea University
issn 1001-6279
doi_str_mv 10.1016/j.ijsrc.2023.08.002
publisher Elsevier BV
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 Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering
url http://dx.doi.org/10.1016/j.ijsrc.2023.08.002
document_store_str 0
active_str 0
description Hyperconcentrated turbidity currents typically display non-Newtonian characteristics that influence sediment transport and morphological evolution in alluvial rivers. However, hydro-sediment-morphological processes involving hyperconcentrated turbidity currents are poorly understood, with little known about the effect of the non-Newtonian rheology. The current paper extends a recent two-dimensional double layer-averaged model to incorporate non-Newtonian constitutive relations. The extended model is benchmarked against experimental and numerical data for cases including subaerial mud flow, subaqueous debris flow, and reservoir turbidity currents. The computational results agree well with observations for the subaerial mud flow and independent numerical simulations of subaqueous debris flow. Differences between the non-Newtonian and Newtonian model results become more pronounced in terms of propagation distance and sediment transport rate as sediment concentration increases. The model is then applied to turbidity currents in the Guxian Reservoir planned for middle Yellow River, China, which connects to a tributary featuring hyperconcentrated sediment-laden flow. The non-Newtonian model predicts slower propagation of turbidity currents and more significant bed aggradation at the confluence between the tributary Wuding River and the Yellow River in the reservoir than its Newtonian counterpart. This difference in model performance could be of considerable importance when optimizing reservoir operation schemes.
published_date 2023-12-31T16:31:25Z
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