| 圆形数值波浪水池斜向和多向入射波浪模拟研究 |
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| 引用本文： | 任兴月,陶军,彭伟.圆形数值波浪水池斜向和多向入射波浪模拟研究[J].海洋工程,2018,36(4):78-87. |
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| 作者姓名： | 任兴月 陶军 彭伟 |
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| 作者单位： | 海南大学海洋工程与技术系;河海大学港口海岸与近海工程系 |
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| 基金项目： | 国家自然科学基金（51609056） |
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| 摘 要： | 为了研究斜向入射波浪,基于三维不可压缩两相流模型,开发了一套圆形数值波浪水池数值模型。在圆形波浪水池中,通过源项造波法成功生成了任意入射方向的波浪,并且利用人工摩擦项模拟阻尼区以数值耗散反射波浪。模型基于嵌入式多块网格体系,采用FVM法(finite volume method)离散Navier-Stokes方程,VOF法(volume of fluid)追踪自由水面。试验结果表明,斜向入射波浪的模拟结果与理论值基本一致,圆形波浪水池在模拟斜向入射波浪时,有效区域的面积较传统波浪水池显著增大,而且有效区域受波浪入射角度的影响也较小。同时,通过叠加多列斜向入射波浪,模拟出了多向交叉波列,并通过与理论结果对比,发现其具有较高的精度。
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| 关 键 词： | 斜向入射波浪 圆形波浪水池 柱坐标系 VOF法 FVM法 |
Study on oblique and multi directional waves based on numerical circular wave tank |
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| REN Xinyue,TAO Jun and PENG Wei.Study on oblique and multi directional waves based on numerical circular wave tank[J].Ocean Engineering,2018,36(4):78-87. |
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| Authors: | REN Xinyue TAO Jun and PENG Wei |
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| Institution: | School of Civil Engineering and Architecture, Hainan University, Haikou 570228, China,School of Civil Engineering and Architecture, Hainan University, Haikou 570228, China and College of Port, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | To study the directional waves, a numerical circular wave tank was developed based on the three dimensional incompressible two phase flow model. Within the circular wave tank, waves with arbitrary incident direction could be generated by adopting a wave source term to the continuity equation, and the reflection waves could be numerically dissipated using a damping zone by adding an artificial friction term to the momentum equation. The numerical computation was solved based on an embedded grid system, and the control equations were discreted by using the finite volume method (FVM). To track the free surface, the volume of fluid (VOF) was applied. The numerical results with the oblique waves agree well with the theoretical data. The results show that the circular wave tank has an advantage in simulating direction waves, and the effective area in the circular wave tank for oblique wave simulation is significantly larger than that in a traditional rectangular wave tank. And the incident angle of the oblique wave will not affect the effective area in the circular wave tank, while it is mainly influenced by the wave incident direction, wave maker in a rectangular wave tank. Moreover, multi-directional cross waves were also simulated by a superimposition of the oblique waves in this work with high accuracy. |
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| Keywords: | Study on oblique and multi-directional waves based on numerical circular wave tank |
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