基于LBM湍流Rayleigh-Bénard对流相干结构特性研究

对流现象广泛存在于自然界和工业生产中，Rayleigh-Bénard(RB)热对流系统则是从众多自然现象中抽象出来的研究对流现象的最基本的非线性模型之一，然而，目前人们对湍流RB对流中羽流相干结构的规律和本质仍然所知有限，针对目前湍流RB热对流相干结构研究的迫切需求和国内外研究现状与机遇，本项目以湍流RB对流为研究背景，从理论分析、数值模拟等方面对湍流RB对流相干结构开展系统深入的研究，构建适合湍流RB对流的三维LBM模型，开展湍流RB对流数值计算；在形态学上，建立各种羽流之间演化特征关系；在几何学上，揭示羽流的三维几何特征；在传热学上，建立羽流与对流传热的标度律之间的关系，从而揭示湍流RB对流中羽流相干结构的规律和本质，争取在基础层次都取得出色的系列成果，为解决其他湍流RB对流热有关的类似难题作科学基础储备。

The phenomenon of convection exists in nature and industrial production widely. Rayleigh-Bénard(RB) heat convection is one of the most fundamental nonlinear model in the abstracted convection phenomenon .However, people have little knowledge about the law and nature of the plume coherent structure which exists in turbulent RB convection at present. According to the current urgent demand for the coherent structure of turbulent RB convection and the research status at home and abroad, RB convection as research background are carried out systematic and further research about the coherent structure of turbulent RB convection from theoretical analysis, numerical simulations.A new 3d LBM model will be established for the turbulent RB convection in the project, and the numerical calculation of turbulent RB convection is conducted. In morphology, The relationship of various plum evolution characteristics is established in the project; In geometry, the three-dimensional geometric features of the plume is revealed in the project. In heat transfer, the project is established the relationship of the scaling law between the plume and convective heat transfer. All of those areto reveal the law and nature of the plume coherent structure which exists in turbulent RB convection, strive to achieve outstanding results in the basic level series and as the scientific basis reserves for solving other similar problems of turbulent RB convective.