A Numerical Wave Tank for Nonlinear Waves with Passive Absorption  

作　　者：周宗仁 尹彰 石瑞祥 

机构地区：[1]Department of Harbour and River Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan, China [2]Department of Civil Engineering, Tung-Nan Institute of Technology, Taiwan, China

出　　处：《China Ocean Engineering》2001年第2期253-268,共16页中国海洋工程（英文版）

基　　金：The authors wish to express their gratitude for the financial aid of the National Science Council, China.Project Nos. NSC-89-2611-E-019-027(CRC)and NSC-89-2611-E-019-058(JZY).

摘　　要：A numerical wave tank with passive absorption for irregular waves is considered in this paper. Waves with spectral shapes corresponding to that of the Mitsuyasu- Bretschneider type are used as the initial condition at one end of the flume, An absorbing boundary is imposed at the other end of the wave flume to minimize reflection. By use of a Lagrangian description for the Surface elevation, and finite difference for approximation of the time derivative, the problem is then solved by the boundary element method, The effects of the absorbing boundary are investigated by varying the values of the absorption coefficient mu, and studying the time histories of the Surface elevations 'recorded' on pre-selected locations.A numerical wave tank with passive absorption for irregular waves is considered in this paper. Waves with spectral shapes corresponding to that of the Mitsuyasu- Bretschneider type are used as the initial condition at one end of the flume, An absorbing boundary is imposed at the other end of the wave flume to minimize reflection. By use of a Lagrangian description for the Surface elevation, and finite difference for approximation of the time derivative, the problem is then solved by the boundary element method, The effects of the absorbing boundary are investigated by varying the values of the absorption coefficient mu, and studying the time histories of the Surface elevations 'recorded' on pre-selected locations.

关 键 词：numerical wave tank absorbing beach irregular waves 

分 类 号：P731.2[天文地球—海洋科学]