A large-eddy-simulation-based numerical wave tank for three-dimensional wave-structure interaction

Christou, Aristos, Stoesser, Thorsten ORCID: https://orcid.org/0000-0001-8874-9793 and Xie, Zhihua ORCID: https://orcid.org/0000-0002-5180-8427 2021. A large-eddy-simulation-based numerical wave tank for three-dimensional wave-structure interaction. Computers and Fluids 231 , 105179. 10.1016/j.compfluid.2021.105179

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Abstract

A three-dimensional numerical wave tank (NWT) based on the large eddy simulation (LES) code Hydro3D is introduced. The open-source code employs the level set and immersed boundary methods in order to compute the water surface and to account for solid structures in the numerical tank, respectively. The spatially-filtered Navier–Stokes (N-S) equations are solved on a staggered Cartesian grid using the finite difference method while time advancement is achieved using the fractional-step method based on a three-step Runge–Kutta scheme. Velocities and pressure are coupled with the Poisson equation and its solution is obtained via a multi-grid technique. The NWT is then applied to predict the progression and damping of monochromatic waves and the interaction of non-linear waves with various submerged obstacles. The accuracy of the NWT is confirmed by comparing numerical results with data of previously reported laboratory experiments. Comparisons of numerically predicted and measured water-level elevations, local velocity and pressure fields and forces acting on structures under the influence of incoming waves agree well and confirm that the LES-based NWT is able to predict accurately three-dimensional wave-structure interaction.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Elsevier
ISSN:	0045-7930
Date of First Compliant Deposit:	25 November 2021
Date of Acceptance:	23 September 2021
Last Modified:	08 Nov 2023 07:36
URI:	https://orca.cardiff.ac.uk/id/eprint/144774

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