马玉祥

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:水利工程系

学科:港口、海岸及近海工程

办公地点:海洋工程研究所A400

电子邮箱:yuxma@dlut.edu.cn

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INVESTIGATION OF THE EFFECTS ON BENJAMIN-FEIR INSTABILITY BY UNIFORM CURRENTS

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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.