Vortex Models of Turbulence and Large-Eddy Simulation

摘要建议编号：9634222首席研究员：普林这是一项继续研究拉伸涡旋的动力学和运动学在描述湍流细尺度中的作用，特别强调在大涡模拟的背景下细尺度和惯性范围尺度与大尺度的关系。这项研究将集中在三个方面：a)继续开发和测试LES模式，用于日益复杂的流动；b)完成纵向速度结构函数的计算，然后计算其他湍流量的结构函数，如压力和耗散；以及c)继续支持涡动力学研究，这将加深我们对湍流结构的了解。这是对以前工作的扩展，其中湍流的标准模型是在Lundgren的伸展涡模型的基础上发展起来的。

ABSTRACT Proposal Number: 9634222 Principal Investigator: Pullin This is a continuation grant to investigate the role of dynamics and kinematics of stretched vortices in describing the fine scales of turbulence with special emphasis on the relation of the fine and inertial range scales to the large scales in the context of large eddy simulation. The research will focus on three areas: a) continued development and testing of an LES model of for flows of increasing complexity, b) completion of the calculation of the longitudinal-velocity structure functions followed by the calculation of other structure functions of other turbulence quantities such as pressure and dissipation, and c) continuation of supporting research in vortex dynamics which will enhance our understanding of the structure of turbulence. This is an extension of prior work in which a standard model of turbulence was developed on the basis of the stretched vortex model of Lundgren.