受控振动柱体对波浪影响的数值模拟研究

以不可压缩黏性流体的Navier-Stokes方程为控制方程,采用RNG k-ε湍流模型,利用VOF方法追踪运动的自由表面的方法,建立了三维数值波浪与振动柱体相互作用的模型.基于经典绕射理论验证了波浪绕固定柱体传播的数值模型的可靠性,再采用动边界技术赋予柱体振动规律,研究受控振动柱体对波浪传播的影响,并通过控制柱体初始振动相位变化,系统地给出了在柱体振动的不同初始相位下柱体前后波浪变化的规律.

Numerical simulation of effect on wave propagation by controlled vibrating cylinder

This paper presents some results from a numerical model for simulating the effect on wave propagation by a controlled vibrating cylinder.The volume of fluid(VOF) technique coupled with the incompressible Navier-Stokes equations and RNG turbulence closure model are used in the numerical model.The model is first validated by comparing the computed results with those from potential theory for the case of wave diffraction around a stationary cylinder.The two sets of results are in good agreement with each other.The cylinder is then set into oscillation in the same frequency of the incoming wave,but at different phase angles.The free surface profiles near the cylinder vibrating at different phase angles are computed.The results demonstrate that the proposed model is capable of simulating unsteady free surface flows with strong nonlinear fluid-structure interactions.