Numerical Study of Influence of Currents on Nonlinear Focusing Waves  

作　　者：马玉祥 马小舟 董国海 柳淑学 李金宣 

机构地区：[1]State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology

出　　处：《China Ocean Engineering》2009年第4期623-634,共12页中国海洋工程（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.50679010 and 50921001);the Program for New Century Excellent Talents in Universities of China(Grant No.NCET-05-0282)

摘　　要：In this paper, a numerical model for nonlinear wave propagation in currents is formulated by a set of enhanced fully nonlinear Boussinesq equations with ambient currents. This model is verified by comparison with the published results. Then the influence of currents on nonlinear focusing waves is studied by use of the numerical model. It is found that the effect of currents on the surface elevations at the fecal location is negligible. Following currents can augment the maximum crest of focusing wave while decrease the focusing time, and vice versa for opposing currents. Furthermore, both opposing and following currents can shift the focal location forward relative to that in quiescent water.In this paper, a numerical model for nonlinear wave propagation in currents is formulated by a set of enhanced fully nonlinear Boussinesq equations with ambient currents. This model is verified by comparison with the published results. Then the influence of currents on nonlinear focusing waves is studied by use of the numerical model. It is found that the effect of currents on the surface elevations at the fecal location is negligible. Following currents can augment the maximum crest of focusing wave while decrease the focusing time, and vice versa for opposing currents. Furthermore, both opposing and following currents can shift the focal location forward relative to that in quiescent water.

关 键 词：Boussinesq model wave-current interactions focusing waves 

分 类 号：P731.2[天文地球—海洋科学]