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内孤立波波致流场数值模拟研究
王伟1, 郭海燕1, 王飞2, 苗得胜1, 马东1
1.中国海洋大学工程学院 青岛 266100;2.山东科技大学土木工程与建筑学院 青岛 266590
摘要:
基于KdV、mKdV理论,利用Fluent计算软件,采用“平板拍击”造波方法,进行内孤立波数值模拟,并与物理实验结果进行对比验证。利用数值模拟结果,分析内孤立波波致流场变化,结果表明:上下层流体中波致水平流速方向相反,均呈现先增加后减小的变化趋势,且波谷经过时刻流速最大;在波谷经过断面处,波致水平流速在上层流体中沿垂向分布无明显变化,在波面以下的下层流体中有衰减趋势,但衰减很小;两层流体界面与波谷之间存在过渡水深范围,水平流速在该水深范围内沿垂向衰减明显,且随内孤立波振幅的增大,过渡水深范围有所增大。
关键词:  Fluent  内孤立波  数值模拟  流场特性  物理实验
DOI:10.11693/hyhz20150600165
分类号:
基金项目:国家自然科学基金项目,51279187号;山东省科技重大专项项目,2015ZDZX04003号。
A NUMERICAL SIMULATION ON FLOW FIELD INDUCED BY INTERNAL SOLITARY WAVES
WANG Wei1, GUO Hai-Yan1, WANG Fei2, MIAO De-Sheng1, MA Dong1
1.Engineering College, Ocean University of China, Qingdao 266100, China;2.College of Architecture and Civil Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Abstract:
Based on KdV and mKdV theories, we simulated internal solitary waves generated in flat slapping piston wave-making technology with software Fluent. We then verified the the flow characteristics against experimental data. The results show that the wave-induced horizontal velocities are opposite in direction between upper and lower layers of fluid, showing a trend of going up first, reaching the maximum when passing the trough of the internal wave, and then going down. Across the trough, the wave-induced velocities in vertical distribution in upper layer did not change remarkably; and they decayed slightly in the lower layer. A transitional zone was observed between the interface of the two layers and the wave trough surface, in which the wave-induced velocities weakened obviously. With the increase in amplitude of internal solitary wave, the range of the transitional zone increased too.
Key words:  Software Fluent  internal solitary wave  numerical simulation  flow characteristics  physical experiment
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