A Cartesian cut-cell based multiphase flow model for large-eddy simulation of three-dimensional wave-structure interaction

Xie, Zhihua ORCID: https://orcid.org/0000-0002-5180-8427, Stoesser, Thorsten, Yan, Shiqiang, Ma, Qingwei and Lin, Pengzhi 2020. A Cartesian cut-cell based multiphase flow model for large-eddy simulation of three-dimensional wave-structure interaction. Computers and Fluids 213 , 104747. 10.1016/j.compfluid.2020.104747

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Abstract

A two-phase flow numerical approach for performing large-eddy simulations of three-dimensional (3D) wave-structure interaction is presented in this study. The approach combines a volume-of-fluid method to capture the air-water interface and a Cartesian cut-cell method to deal with complex geometries. The filtered Navier–Stokes equations are discretised by the finite volume method with the PISO algorithm for velocity-pressure coupling and the dynamic Smagorinsky subgrid-scale model is used to compute the unresolved (subgrid) scales of turbulence. The versatility and robustness of the presented numerical approach is illustrated by applying it to solve various three-dimensional wave-structure interaction problems featuring complex geometries, such as a 3D travelling wave in a closed channel, a 3D solitary wave interacting with a vertical circular cylinder, a 3D solitary wave interacting with a horizontal thin plate, and a 3D focusing wave impacting on an FPSO-like structure. For all cases, convincing agreement between the numerical predictions and the corresponding experimental data and/or analytical or numerical solutions is obtained. In addition, for all cases, water surface profiles and turbulent vortical structures are presented and discussed.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Advanced Research Computing @ Cardiff (ARCCA) Engineering
Publisher:	Elsevier
ISSN:	0045-7930
Funders:	EPSRC, Royal Society
Date of First Compliant Deposit:	8 October 2020
Date of Acceptance:	25 September 2020
Last Modified:	01 Aug 2024 13:54
URI:	https://orca.cardiff.ac.uk/id/eprint/135374

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