Recent progress on monotone integrated large eddy simulation of free jets
Recent progress on monotone integrated large eddy simulation of free jets
复制标题
自由射流单调集成大涡模拟最新进展
DOI：
10.1299/jsmeb.49.890
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
F. Grinstein
中科院分区：
文献类型：
--
作者：
F. Grinstein
Kelvin-Helmholtz不稳定性驱动的剪切流动的大涡模拟（LES），如混合层，尾流和射流是非常感兴趣的，因为它们在许多实际应用中的关键作用。单调集成LES（MILES）的方法是出于这些研究，并在一个典型的MILES射流模型中所涉及的基本组件进行了说明。从MILES射流研究的例子被用来解决从层流条件下的喷嘴出口处的湍流过渡的主要方面，包括全球不稳定性的发生，复杂的三维涡量几何形状，以及它们对射流夹带的影响。过渡模拟射流的小尺度特征的定量分析，并在这种情况下解决收敛问题。
Large Eddy Simulation (LES) of shear flows driven by Kelvin-Helmholtz instabilities such as mixing layers, wakes, and jets is of great interest because of their crucial role in many practical applications. The Monotone Integrated LES (MILES) approach is motivated here for these studies, and the basic components involved in a typical MILES jet model are described. Examples from MILES jet studies are used to address major aspects of transition to turbulence from laminar conditions at the nozzle exit including, the occurrence of global instabilities, complex three-dimensional vorticity geometries, and their impact on jet entrainment. Quantitative analysis of the small-scale features of the transitioning simulated jets is presented, and convergence issues are addressed in this context.