论文标题
阐明分层介质中湍流喷泉中的相干结构，运输障碍和夹带
Elucidating coherent structures, transport barriers and entrainment in turbulent fountains in stratified media
论文作者
论文摘要
我们使用三维有限的Lyapunov指数在不同条件下分析了分层介质中湍流喷泉的流动组织。在三种不同配置中负责运输壁垒的主要拉格朗日相干结构表明自相似行为。在提出了划定起义喷泉边界表面的标准之后，我们使用适当的系数在完全开发的流动条件下量化了夹带和重新进入速率。最后，我们的分析应用于选择性倒置的水槽，这是湍流喷泉的技术应用，将湍流确定为有利于设备效率的主要机制。
We analyse the flow organization of turbulent fountains in stratified media under different conditions, using three-dimensional finite-time Lyapunov exponents. The dominant Lagrangian coherent structures responsible for the transport barriers in three different configurations suggest a self-similarity behaviour. After proposing a criterion for delimiting the boundary surface of the uprising fountain, we quantify the entrainment and re-entrainment rates under fully developed flow conditions using the proper coefficients. Finally, our analysis was applied to the Selective Inverted Sink, a technological application of turbulent fountains, identifying turbulence as the primary mechanism favouring the device's efficiency.
