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A new 1D coupled hydrodynamic discrete element model for floating debris in violent shallow flows

Lookup NU author(s): Sam Mahaffey, Professor Mohamed Rouainia, Dr Gang Wang

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Abstract

The effect of floating objects has so far rarely been considered in flood modelling and risk assessment, despite having significant implications for structural design in flood-prone and coastal areas. In this work, a novel two-way method is proposed to fully couple a discrete element model to a hydrodynamic model to simulate complex debris-enriched flow hydrodynamics. The adopted hydrodynamic model solves the nonlinear shallow water equations (SWEs) using a finite volume shock-capturing numerical method. After being validated against an idealized analytical test, the new coupled model is used to reproduce flume experiments of floating debris driven by dam-break waves. The numerical results agree well with the experimental measurements, demonstrating the model’s capability in simulating the complex fluid–debris interactions induced by violent shallow flows.

Publication metadata

Author(s): Xiong Y, Mahaffey S, Liang Q, Rouainia M, Wang G

Publication type: Article

Publication status: Published

Journal: Journal of Hydraulic Research

Year: 2020

Volume: 58

Issue: 5

Pages: 778-789

Print publication date: 01/09/2020

Online publication date: 05/12/2019

Acceptance date: 16/09/2019

ISSN (print): 0022-1686

ISSN (electronic): 1814-2079

Publisher: Taylor & Francis

URL: https://doi.org/10.1080/00221686.2019.1671513

DOI: 10.1080/00221686.2019.1671513

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