摘要
An idealized numerical wave flume has been established by finite element method on the bases of Navier Stokes equations through prescribing the appropriate boundary conditions for the open boundary,incident boundary,free surface and solid boundary in this paper.The characteristics of waves propagating over a step have been investigated by this numerical model.The breaker wave height is determined depending on the kinetic criterion.The numerical model is verified by laboratory experiments,and the empirical formula for the damping of wave height due to breaking is also given by experiments.
通过对开边界、入射边界、自由表面边界以及底边界的合理处理，用有限元法建立了基于Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程的二维数值波浪水槽．利用这一数值模型，计算了波浪在台阶地形上的传播变形．基于运动学指标判断了波浪破碎的发生，并给出了临界破碎波高．实验结果证实了本文模型的可靠性，并给出了破碎后波高的衰减规律．
