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

Xie, Zhihua, 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: 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: 29 Oct 2020 10:34
URI: http://orca.cf.ac.uk/id/eprint/135374

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