Finite Element Based Viscous Numerical Wave Flume
Finite Element Based Viscous Numerical Wave Flume
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DOI：
10.1155/2013/308436
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发表时间：
2013
影响因子：
2.1
通讯作者：
J. Qin;Bing Chen;Lin Lu
中科院分区：
文献类型：
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作者：
J. Qin;Bing Chen;Lin Lu
本文建立了具有自由面的粘性流体流动的二维数值波浪水槽。它基于N-S方程的迎风有限元解，自由面捕获采用清水体积法，兴波采用内造波法，吸波采用海绵层。文中还考虑了沿进口规定的速度边界条件和沿出口规定的辐射边界条件对波浪的产生和吸收。通过对溃坝水流、消力池液体晃动、直壁线性水波传播与反射、陡峭台阶上的非线性孤立波裂变、浮体约束的窄缝内波致流体共振等几个基准的计算，验证了数值模型的有效性。与已有的实验数据、数值结果和理论解的比较表明，本文的数值波浪水槽在处理复杂的界面流动和水波与建筑物的相互作用方面具有良好的性能。
A two-dimensional numerical wave flume (NWF) for viscous fluid flows with free surface is developed in this work. It is based on the upwind finite element solutions of Navier-Stokes equations, CLEAR-volume of fluid method for free surface capture, internal wave maker for wave generation, and sponge layer for wave absorbing. The wave generation and absorption by prescribing velocity boundary conditions along inlet and radiation boundary condition along outlet are also incorporated. The numerical model is validated against several benchmarks, including dam-breaking flow, liquid sloshing in baffled tank, linear water wave propagation and reflection from vertical wall, nonlinear solitary wave fission over sharp step, and wave-induced fluid resonance in narrow gap confined by floating structures. The comparisons with available experimental data, numerical results, and theoretical solutions confirm that the present numerical wave flume has good performance in dealing with complex interface flows and water wave interaction with structures.