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Simulation of three-dimensional free-surface dam-break flows over a cuboid, cylinder, and sphere

Xie, Zhihua, Stoesser, Thorsten and Xia, Junqiang 2021. Simulation of three-dimensional free-surface dam-break flows over a cuboid, cylinder, and sphere. Journal of Hydraulic Engineering 147 (9) , 06021009. 10.1061/%28ASCE%29HY.1943-7900.0001910

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Abstract

A three-dimensional (3D) numerical study is undertaken to investigate dam-break flows over 3D structures. A two-phase flow model has been developed within the large-eddy simulation (LES) framework. The governing equations have been discretized using the finite-volume method, with the air-water interface being captured using a volume-of-fluid method while the Cartesian cut-cell method deals with complex geometries. The robustness and versatility of the proposed numerical approach are demonstrated first by applying it to a 3D dam-break flow over a cuboid. Good agreement is obtained between the simulation results and the corresponding experimental data and other numerical solutions. Then, a horizontal cylinder and a sphere are subjected to the same dam-break flow. Snapshots of water surface profiles are presented and discussed, and turbulent vortical structures are identified in the flow. In addition, the internal kinematics, hydrodynamic loading on the structure, and energy dissipation during dam-break flow impact are analyzed and discussed, providing more insight into such flows.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: American Society of Civil Engineers
ISSN: 0733-9429
Funders: Royal Society
Date of First Compliant Deposit: 27 March 2021
Date of Acceptance: 25 March 2021
Last Modified: 07 Oct 2021 16:28
URI: https://orca.cardiff.ac.uk/id/eprint/140145

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