Laminar and turbulent bottom boundary layer induced by nonlinear water waves
Laminar and turbulent bottom boundary layer induced by nonlinear water waves
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DOI：
10.1061/(asce)0733-9429(1999)125:6(631
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发表时间：
1999-06
影响因子：
2.4
通讯作者：
Sing-Kwan Lee;K. Cheung
中科院分区：
文献类型：
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作者：
Sing-Kwan Lee;K. Cheung
本文报道了波浪诱导边界层流动的数值研究结果。在本文中，作者考虑了一种粘性-无粘性耦合方法，在无粘流计算中满足完全非线性的自由面边界条件，而海床附近的粘性流动用雷诺平均的N-S方程来求解，而不是用薄边界层方程来求解。为模拟湍流，采用两层k-e模型。粘性和无粘性计算的耦合是通过匹配边界上的速度和压力分布的直接匹配来实现的。数值模型的验证分别针对无粘性和粘性模型，以及耦合方法作为一个整体进行。数值结果与理论解和现有的实验数据进行了比较。用粘性-涡量耦合方法对强、弱非线性波浪的层流和湍流边界层进行了参数研究。
Results of a numerical study to investigate wave-induced boundary layer flows are reported. In this study, the writers consider a coupled viscous-inviscid approach, in which the fully nonlinear free surface boundary conditions are satisfied in the inviscid flow calculation, while the viscous flow near the seabed is solved via the Reynolds-averaged Navier-Stokes equations, instead of the thin boundary layer equation. To simulate the turbulent flow, a two-layer k-e model is applied. Coupling of the viscous and inviscid computations is accomplished by the direct matching of the velocity and pressure distributions on the matching boundaries. Validation of the numerical model is carried out separately for the inviscid and viscous models, and the coupling approach as a whole. The numerical results are compared with theoretical solutions and available experimental data. A parametric study of the laminar and turbulent boundary layers for highly and weakly nonlinear waves is performed using the coupled viscous-inv...