| 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。 |
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| A NUMERICAL SIMULATION ON FLOW FIELD INDUCED BY INTERNAL SOLITARY WAVES |
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WANG Wei1, GUO Hai-Yan1, WANG Fei2, MIAO De-Sheng1, MA Dong1
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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
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| 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 |
