湍流对流中悬浮大颗粒的动力学特性及其对流结构影响的实验研究

海洋环流在调节全球气候方面发挥重要作用，为开发和利用海洋资源提供重要的保障。海洋浮标作为实时跟踪海洋环流的监测手段，广泛应用于获取海洋数据信息。然而，海洋浮标受制于技术限制，其几何尺寸是否影响其追随环流运动，浮标的动力学特性能否准确表征海洋环流的动力学规律有待研究证实。本项目拟以含悬浮大颗粒的Raylaigh-Bénard湍流热对流为主要研究对象，利用实验研究方法，模拟浮标和海洋环流的相互作用；探讨悬浮大颗粒的拉格朗日动力学特性能否描述大尺度流动结构的动力学规律；研究不同体积分数的颗粒，多悬浮大颗粒的拉格朗日动力学运动过程；分析多颗粒调控作用下大尺度流动结构的流动状态，揭示多颗粒如何改变流动状态实现对湍流结构和传热的控制。本项目的研究有助于理解海洋环流的动力学机制，为工程领域利用悬浮颗粒实现湍流流动状态及传热控制提供解决方案。

Ocean circulation play a crucial role in adjusting climate, which provides important guarantees to exploit and utilize marine resources. Ocean buoys serve as a monitoring mean of real-time tracking ocean circulation and are widely used for acquiring ocean data. Due to the limination of technical requirements, whether buoys size affects following circulation and buoys dynamics accurately represent dynamics of ocean circulation are studied. The proposal uses turbulent Raylaigh-Bénard convection with netrually buoyant particles as the laboratory model. The interaction between buoys and ocean circulation is simulated by experimental methods, to discuss this Lagrangian dynamics of suspended large particles can describe the dynamics of large-scale flow structures; to study that the Lagrangian dynamic process of large particles under different volume fractions of particles, to analyse that the flow states of large-scale flow structures under the control of multi-particles and how multi-particles change the flow states to achieve the control of turbulent structure and heat transfer. This project contributes to the understanding of the dynamics of ocean circulation and provides a solution for the engineering field to control turbulent flow states and heat transport by netrually buoyant particles.