Stretched-Vortex Subgrid Stress Model and Large-Eddy Simulation of Turbulent Flows

摘要CTS-9978551D。人们普遍认为，湍流的LES(大涡模拟)建模是解决使CFD方法能够处理这些技术上和自然发生的流场的需求的最可行的途径。然而，人们也认识到，必须对这些方法进行重大发展(很可能对其目前的结构进行重大修改)才能实现其承诺。Pullin提出的研究将推进一种模拟次网格应力场的方法，原则上，与其他更常用的模型相比，这种方法与次网格流动的重要物理属性更直接相关。预计这种支持将对LES模型的发展做出重大贡献，并将导致当前研究生的准备，他们可以继续这些重要的工作。

AbstractCTS-9978551D. Pullin, California Institute of TechnologyIt is widely accepted that LES (Large Eddy Simulation) modeling of turbulent flows represents the most viable path forward to address the need to enable CFD methods to address these technologically and naturally occurring flow fields. It is also, however, recognized that significant developments must occur for these methods (very likely with significant modifications from their present structure) to fulfill their promise. The proposed study by Pullin will advance an approach to modeling the subgrid stress field that is, in principle, more directly related to the important physical attributes of the subgrid flow than other, more commonly utilized, models.It is expected that this support will contribute significantly to the development of LES models and it will lead to the preparation of current graduate students who can continue these important efforts.