Coupling of non-hydrostatic model with unresolved point-particle model for simulating particle-laden free surface flows

Chen, Yuhang, Chen, Yongping, Xu, Zhenshan, Lin, Pengzhi and Xie, Zhihua ORCID: https://orcid.org/0000-0002-5180-8427 2025. Coupling of non-hydrostatic model with unresolved point-particle model for simulating particle-laden free surface flows. Applied Mathematical Modelling 142 , 115962. 10.1016/j.apm.2025.115962

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Abstract

Sediment-laden flow is a common phenomenon in nature and the deposition of sediments can make a great difference in landscape formation or marine systems. The complexity of this issue can be further increased with temporal variations in the free surface elevation. This paper aims to present a two-phase flow model that effectively integrates the non-hydrostatic free surface model with the Lagrangian point-particle model. The free surface elevation is conceptualized as a height function and is tracked using a Lagrangian-Eulerian method. This new model is validated by five test cases, showing a good agreement with analytical or experimental results. This demonstrates the model's proficiency in handling sediment-laden flow under various free surface flow conditions, particularly with surface waves. Consequently, the proposed model holds promise for investigating sediment-laden flow issues in coastal regions.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Engineering
Publisher:	Elsevier
ISSN:	0307-904X
Funders:	National Key Research and Development Program of China, National Natural Science Foundation of China, Engineering and Physical Sciences Research Council, China Scholarship Council
Date of First Compliant Deposit:	28 January 2025
Date of Acceptance:	20 January 2025
Last Modified:	06 Mar 2025 11:01
URI:	https://orca.cardiff.ac.uk/id/eprint/175495

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