ABSTRACT

Solitary waves are often used to replicate tsunami waves and, therefore, the study of their propagation and interactions with structures could help to understand the impacts of tsunami waves on infrastructures. This paper presents a numerical model that uses the level-set framework for simulating the propagation of solitary waves and their interactions with structures using the immersed boundary method. The model imposes a set of appropriate boundary conditions to prescribe the incoming solitary waves within the sharp-interface immersed boundary method. Turbulence is modelled using the large-eddy simulation. Experimental tests are conducted to measure the free-surface elevation and velocity field evolution of solitary waves, as they propagate downwave interacting with two different wall-mounted structures. Analysis of the computed and experimental results revealed interesting dynamics of primary vortex-tubes forming near the sharp edges of structures. It is shown that the primary vortices eventually split to form pairs of asymmetrical doublets.

摘要

孤立波通常用于复制海啸波，因此，研究它们的传播和与结构的相互作用有助于了解海啸波对基础设施的影响。本文提出了一个数值模型，该模型使用水平集框架来模拟孤立波的传播及其与使用浸入边界法的结构的相互作用。该模型强加了一组适当的边界条件，以在锐界面浸没边界方法中规定传入的孤立波。湍流使用大涡模拟进行建模。进行实验测试以测量孤立波的自由表面高程和速度场演化，因为它们传播下波与两种不同的壁挂式结构相互作用。对计算和实验结果的分析揭示了在结构尖锐边缘附近形成的初级涡管的有趣动力学。结果表明，主涡流最终分裂形成成对的不对称双峰。