波浪与开孔沉箱相互作用的CLEAR-VOF数值模拟

Numerical simulation of wave interaction with perforated caisson breakwaters by CLEAR-VOF method

文章利用三步有限元方法离散Navier-Stokes方程,并借助CLEAR-VOF方法、大涡模拟方法追踪水体自由表面和模拟湍流效应,建立了二维数值波浪水槽。籍此研究了规则波作用下开孔沉箱的反射率和波浪总水平力,并与物模试验结果和其他学者的数模结果以及工程实例进行了对比,吻合良好,为波浪与开孔沉箱相互作用问题的研究探索了一种新的数值模式。

A two-dimensional numerical flume based on the Navier-Stokes equations which were discretized with a three-step finite element method was developed to simulate water wave problems. In this numerical model , large eddy simulation method was used to describe the turbulent effect and computational Lagrangian-Eulerian ad-vection remap and the volume of the fluid method（CLEAR-VOF）was used to advect free surfaces. The reflection coefficient of perforated caisson and the ratio of the total horizontal force acting on the perforated caisson to them acting on the solid caisson had been studied under linear regular waves by using this numerical method. Through the comparison with physical model test,numerical calculation of other scholars and engineering project,it can be known that the numerical method may be useful for studying wave interaction with perforated caisson breakwaters.