The initialization of nonlinear water waves in a numerical wave flume

被引：0
|
作者：
ZHAO Xizeng1
机构：
来源：
Acta Oceanologica Sinica | 2009年 / 28卷 / 06期
基金：
中国国家自然科学基金;
关键词：
wave flume; wavelet transform; time ramp; wave instability; wavemaker;
D O I：
暂无
中图分类号：
P731.22 [波浪];
学科分类号：
0707 ;
摘要：
This study investigates the initialization of nonlinear free-surface simulations in a numerical wave flume.Due to the mismatch between the linear input wavemaker motion and the kinematics of fully nonlinear waves,direct numerical simulations of progressive waves,generated by a sinusoidally moving wavemaker,are prone to suffering from high-frequency wave instability unless the flow is given sufficient time to adjust.A time ramp is superimposed on the wavemaker motion at the start that allows nonlinear free-surface simulations to be initialized with linear input.The duration of the ramp is adjusted to test its efficiency for short waves and long waves.Numerical results show that the time ramp scheme is effiective to stabilize the wave instability at the start of the simulation in a wave flume.
引用
收藏
页码：93 / 102
页数：10
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