MEASURING INTERMITTENCY PARAMETERS OF ENERGY CASCADE IN TURBULENCE

• 来源期刊: 力学学报(英文版)
• 年，卷（期）: 2003,（5）
• 页码范围: 453-457
• 页数: 5页
• 语种: 英文

摘要

Method of measuring physical parameters characterizing intermittency effects of energy cascade in turbulence is presented in the framework of the Hierarchical Structure model. The method of β-test and γ-test enables to verify the existence of hierarchical symmetry and to derive the degree of singularity for the most intermittent structures. The method is applied to analyze data for a high Reynolds number, low-temperature helium turbulent flow. Evidence for universal hierarchical symmetry constant β is reported. Effects of finite statistical sample size are discussed in detail.