个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 海洋油气工程国际合作联合实验室主任
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:建设工程学院
电子邮箱:ghdong@dlut.edu.cn
INVESTIGATION OF THE EFFECTS ON BENJAMIN-FEIR INSTABILITY BY UNIFORM CURRENTS
点击次数:
论文类型:会议论文
发表时间:2013-06-09
收录刊物:EI、CPCI-S、SCIE、Scopus
卷号:5
摘要:Systematic experiments focusing on the evolution of wave trains with initially sidebands on uniform currents are carried out in a physical wave-current flume (65m long, 2m wide and 1.8m deep). Wave trains with different initial steepness and perturbed sidebands are generated to propagate on currents with velocity in the range -0.1< U/c < 0.1 (U is the current velocity, c is the phase velocity of the carrier wave in quiescent water). The experimental results demonstrate that following currents can suppress the modulational instability and reduce the onset criterion. However, opposing currents have the contrary effect. In addition, the estimated experimental initial growth rates of the sidebands are close to the result predicted by the current modified cubic nonlinear Schrodinger equation of Gerber. Furthermore, the development of instability of waves on opposing currents tends to occur in a continuous frequency band rather than in some discrete frequencies.