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Large eddy simulation of wave overtopping on nonuniform Cartesian cut-cell grids
Li, T.Q.; Troch, P.; De Rouck, J. (2004). Large eddy simulation of wave overtopping on nonuniform Cartesian cut-cell grids, in: Chung, J.S. et al. The Proceedings of the 14th (2004) International Offshore and Polar Engineering Conference, Toulon, France, May 23-28, 2004. pp. 276-284
In: Chung, J.S. et al. (2004). The Proceedings of the 14th (2004) International Offshore and Polar Engineering Conference, Toulon, France, May 23-28, 2004. International Society of Offshore and Polar Engineers (ISOPE): California. ISBN 1-880653-62-1, more

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Document type: Conference

Keyword
    Marine
Author keywords
    LES of overtopping of breakingwaves; an implicit finite volume VOF-based solver; a dynamic Smagorinsky model and a nonuniform Cartesian cut-cell mesh

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Abstract
    Overtopping of water waves over the crest of vertical and sloping coastal structures is simulated with large-eddy simulation (LES) in this paper. The computations are conducted in a numerical wave tank, based on our recently developed solver. It involves a time-implicit cell-staggered approximately-factored volume-offluid (VOF) finite volume (FV) approach on a nonuniform Cartesian cut-cell grid. Additionally, the Godunov-type high-order upwind schemes are introduced for discretization of the convective fluxes, while the coupling of the pressure with the velocity is realized by a projection method. A static Smagorinsky model and dynamic one are used for description of the subgrid-scale (SGS) stress. The surface tension effects are considered as a body force according to the continuous surface force manner. When flows are driven by a wave generator located at the inlet, the results for regular and irregular waves indicate that the LES technique predicts most of the significant features of the breaking waves during overtopping process. By comparison, computations agree well with measurements available under grid refinements.

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