不同湍流模式下钱塘江涌潮水流三维模拟

发布时间：2018-06-17 01:00

本文选题：涌潮 + 三维模拟　；参考：《海洋工程》2017年01期

【摘要】：钱塘江涌潮具有动力作用强和流速变化快等特点。涌潮水流紊动复杂,流速的垂向分布和紊动强度息息相关。通过涌潮水流实测资料的分析可以发现,涌潮作用下流速垂向分布在底部和上层存在差异。为研究涌潮作用下流速垂向分布的特征,应用基于非结构网格下有限体积法模型FVCOM对钱塘江涌潮河段水流运动进行三维数值模拟。考虑到涌潮紊动作用复杂且对流速的垂向分布起着重要影响,采用不同的湍流模式对涌潮传播过程中水流的运动特征开展研究。通过与涌潮河段实测资料的验证,复演涌潮到达前后水流运动特征,给出涌潮水流湍动能的变化过程。研究成果有助于深入认识涌潮水流紊动特征和流速的分布规律,为涌潮作用下物质输运的研究提供基础。
[Abstract]:The tidal bore of Qiantang River is characterized by strong dynamic action and rapid change of velocity. The turbulent flow of tidal bore is complicated, and the vertical distribution of velocity is closely related to the intensity of turbulence. Through the analysis of the measured data of tidal bore flow, it can be found that the vertical distribution of velocity is different between the bottom and the upper layer under the action of tidal bore. In order to study the vertical distribution of velocity under the action of tidal bore, FVCOM model based on unstructured grid is used to simulate the flow in Qiantang River. Considering the complex turbulent action of bore and its important influence on the vertical distribution of velocity, different turbulence models are used to study the characteristics of flow motion in the process of tidal bore propagation. Through the verification with the measured data of the tidal bore reach, the characteristics of the water flow before and after the tidal bore reach are derived, and the change process of the turbulent kinetic energy of the tidal bore is given. The research results are helpful to understand the turbulent characteristics of tidal bore and the distribution of velocity, and provide the basis for the study of mass transport under the action of tidal bore.
【作者单位】：浙江省水利河口研究院;浙江省海洋规划设计研究院;浙江省河口海岸重点实验室;
【基金】：国家自然科学基金资助项目(51379190,41306082)
【分类号】：TV131.3

【相似文献】