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Lookup NU author(s): James Mckenna, Dr Vassilis Glenis, Professor Chris Kilsby
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2024 The Author(s)The capability to accurately predict flood flows via numerical simulations is a key component of contemporary flood risk management practice. However, modern flood models lack the capacity to accurately model flow interactions with linear features, or hydraulic structures like bridges and gates, which act as partial barriers to flow. Presented within this paper is a new Riemann solver which represents a novel approach to modelling fluid–structure interactions within two-dimensional hydrodynamic models. The solution procedure models obstacles as existing at the interface between neighbouring cells and uses a combination of internal boundary conditions, different forms of the conservation laws and vertical discretisation of the neighbouring cells to resolve numerical fluxes across a partially obstructed interface. The predictive capacity of the solver has been validated through comparisons with experimental data collected from experiments conducted in a state-of-the-art hydraulic flume. Since the solution procedure is local, only applying to the cells within the immediate vicinity of a structure, the method is designed to be compatible with existing two-dimensional hydrodynamic models which use a finite volume scheme to solve the shallow water equations.
Author(s): Mckenna J, Glenis V, Kilsby C
Publication type: Article
Publication status: Published
Journal: Computer Methods in Applied Mechanics and Engineering
Year: 2024
Volume: 427
Print publication date: 01/07/2024
Online publication date: 07/05/2024
Acceptance date: 16/04/2024
Date deposited: 13/05/2024
ISSN (print): 0045-7825
Publisher: Elsevier B.V.
URL: https://doi.org/10.1016/j.cma.2024.117003
DOI: 10.1016/j.cma.2024.117003
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