| 近岸破碎波水体掺气及气泡输运过程研究 |
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| 引用本文： | 邓斌,唐瑶,蒋昌波,王孟飞.近岸破碎波水体掺气及气泡输运过程研究[J].热带海洋学报,2018,37(6):33-40. |
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| 作者姓名： | 邓斌 唐瑶 蒋昌波 王孟飞 |
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| 作者单位： | 1. 长沙理工大学水利工程学院, 湖南 长沙 4101142. 水沙科学与水灾害防治湖南省重点实验室, 湖南 长沙 4101143. 长沙理工大学水科学与环境工程国际研究中心, 湖南 长沙 410114 |
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| 基金项目： | 国家自然科学基金项目(51509023,51239001);湖南省自然科学基金项目(2018JJ3535);国家留学基金项目(201608430158) |
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| 摘 要： | 为准确探讨破碎波作用下气体如何卷入以及气泡的形成与输运特性, 文章结合粒子图像测速技术(particle image velocimetry, PIV)、高速相机和气泡测量系统, 以及基于Navier-Stokes方程的三维数值模型对气泡形成及其运动过程进行研究。研究结果表明: 文章建立的数值模型能合理地捕捉到破碎波作用下气体的卷入及其输运过程; 波浪的破碎会形成较大的气腔, 其破裂过程又将产生大量的气体微团; 气泡会增加水体的紊动, 造成水体与空气交界面附近形成大量的漩涡以及水体的飞溅; 气泡的破裂会消耗大量的水体能量, 同时发现较大的紊动动能与气泡的生成有关, 且气泡数随平均紊动动能的增加呈线性增长关系。
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| 关 键 词： | 破碎波 掺气 气泡 OpenFOAM 紊动动能 |
| 收稿时间： | 2018-01-24 |
Air entrainment and bubble movement processes in breaking waves |
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| Bin DENG,Yao TANG,Changbo JIANG,Mengfei WANG.Air entrainment and bubble movement processes in breaking waves[J].Journal of Tropical Oceanography,2018,37(6):33-40. |
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| Authors: | Bin DENG Yao TANG Changbo JIANG Mengfei WANG |
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| Institution: | 1. School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, China;2. Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, China3. International Research Center of Water Science & Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China; |
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| Abstract: | To investigate how air is entrained and the formation and transport of bubbles under breaking waves, we carry out studies using particle image velocimetry (PIV), high-speed camera, bubble measuring system, and a three-dimensional numerical model based on the Navier-Stokes equations. The results show that the established numerical model can reasonably capture the air entrainment and bubble transport process under the action of breaking wave. A large bubble cavity is formed during wave breaking phase, which in turn produces a large amount of bubble cloud. Bubbles increase the turbulence of water, resulting in the formation of a large number of vortexes and water splash near the interface with the air. The burst of bubbles consumes a large amount of wave energy, and the larger turbulent kinetic energy is related to bubble generation. Moreover, we find that the number of bubbles increases linearly with the increase of average turbulent kinetic energy. |
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| Keywords: | breaking wave air entrainment bubble OpenFOAM turbulent kinetic energy |
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