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首页> 外文期刊>European Journal of Mechanics, B. Fluids >Numerical wave breaking with macro-roughness
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Numerical wave breaking with macro-roughness

机译：具有宏观粗糙度的数值波破碎

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摘要

This paper reports on a numerical investigation of solitary wave breaking over a sloping bottom covered with macro-roughness elements. Wave breaking is simulated by solving Euler equations with a two phase incompressible flow model. The hyperbolic system of the conservation laws is solved with a finite volume discretization on an unstructured grid. An artificial compressibility approach allows the use of a fully explicit scheme for an efficient parallel implementation. The numerical model is based on a low Mach number preconditioning and a second order Riemann solver. Several test cases are performed to analyze the role played by macro-roughness on the breaking dynamics. The influence of the macro-roughness elements on the solitary long wave breaking is shown to depend on two dimensionless ratios D/A and H/A, where D, H and A are the separation distances between the macro-roughness elements, the height of the elements and the wave amplitude, respectively. Significant effects are observed for large values of D/A and H/A. The successive cycles of impact/splash-ups/rebounds are strongly impaired. Three-dimensional wave breaking simulations are presented, showing the robustness of the method for modeling complex wave-structure interactions.
机译：本文报道了一个孤立波在一个倾斜的底部的数值研究，该倾斜的底部覆盖有宏观粗糙度元素。通过用两相不可压缩流动模型求解欧拉方程来模拟波浪破碎。守恒律的双曲系统通过在非结构化网格上的有限体积离散化解决。人工压缩方法允许使用完全明确的方案进行有效的并行实现。数值模型基于低马赫数预处理和二阶Riemann求解器。执行了几个测试用例，以分析宏观粗糙度对断裂动力学的影响。宏观粗糙度元素对孤立长波破碎的影响表明取决于两个无因次比D / A和H / A，其中D，H和A是宏观粗糙度元素之间的分隔距离，元素和波幅。对于大的D / A和H / A，观察到了显着的影响。冲击/溅起/反弹的连续周期受到严重损害。提出了三维波模拟，显示了建模复杂波结构相互作用的方法的鲁棒性。

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