Numerical Simulation of Nonlinear Viscous Wavefields Generated by Piston-Type Wavemaker
Numerical Simulation of Nonlinear Viscous Wavefields Generated by Piston-Type Wavemaker
复制标题
活塞式造波器产生非线性粘性波场的数值模拟
DOI：
10.1061/(asce)0733-9399(1998)124:10(1110
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Jaw
中科院分区：
文献类型：
--
作者：
Ching;E. Zhang;Jaw
通过求解非定常二维Navier-Stokes方程和精确自由表面边界条件，提出了一种活塞式造波器产生的非线性波场的数值模拟方法。斯坦福大学改进的标记和单元法用于处理自由表面进行了修改，以允许更准确地外推在自由表面的速度分量。该数值格式可以模拟活塞式造波器产生的小振幅和大振幅的波浪，并可以详细地考察波浪的形成过程。为了验证数值结果的准确性，将数值方法生成的波浪剖面与理论和实验结果进行了比较。当波浪陡度较小时，数值计算结果与理论和实验结果吻合较好。当波浪陡度较大时，数值波高略低于实验波高。波场的特性，包括…
A numerical method for the simulation of nonlinear wavefields generated by a piston-type wavemaker has been developed by solving the unsteady, two-dimensional Navier-Stokes equations and the exact free surface boundary conditions. The Stanford University modified marker and cell method for treating the free surface has been modified to permit more accurate extrapolation of the velocity components at the free surface. Both small- and large-amplitude waves generated by a piston-type wavemaker can be simulated by the present numerical scheme, and the process of wave formation can be examined in detail. To verify the accuracy of the numerical results, the wave profiles generated by the numerical method are compared with both theoretical and experimental results. For small wave steepness, the numerical results coincide well with theoretical and experimental results. For large wave steepness, the numerical wave heights are slightly lower than the experimental ones. The characteristics of the wavefields, includi...