ON THE EVOLUTION OF DECAYING ISOTROPIC TURBULENCE

• 来源期刊: 力学学报（英文版）
• 年，卷（期）: 2004,（1）
• 页码范围: 113-116
• 页数: 4页
• 语种: 英文

摘要

A direct numerical simulation is performed on 2563 grids for decaying isotropic turbulence. The total kinematic energy, Taylor micro-scale, Taylor micro-scale Reynolds number and the velocity derivative skewness are calculated. The snapshots of energy spectra and energy transfer spectra are plotted. These measurements verify the DIA predictions: decaying isotropic turbulence has the energy propagation and occupies the final decay periods. The skewness remains to some level with small variation even in the final decay period.