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

湍流的拉伸涡亚网格应力模型和大涡模拟

• 批准号: 9978551
• 负责人: Dale Pullin
• 金额: $ 24万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9978551&HistoricalAwards=false
• 关键词: Stretched; Vortex; Subgrid; Stress; Model

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.

摘要CTS-9978551D。普林，加州理工学院人们普遍认为，湍流的 LES（大涡模拟）建模代表了满足 CFD 方法解决这些技术和自然发生的流场需求的最可行的路径。 然而，人们还认识到，这些方法必须取得重大进展（很可能对其目前的结构进行重大修改）才能实现其承诺。 Pullin 提出的研究将提出一种对次网格应力场进行建模的方法，原则上，与其他更常用的模型相比，该方法与次网格流的重要物理属性更直接相关。预计这种支持将为 LES 模型的开发做出重大贡献，并将为当前的研究生做好准备，让他们能够继续这些重要的努力。