Developing homogeneous isotropic turbulence

作者：Bos Wouter J T; Connaughton Colm^*; Godeferd Fabien

来源：Physica D: Nonlinear Phenomena , 2012, 241(3): 232-236.

DOI：10.1016/j.physd.2011.02.005

• Homogeneous isotropic turbulence
• EDQNM model
• Transient dynamics
• Self-similarity

We investigate the self-similar evolution of the transient energy spectrum, which precedes the establishment of the Kolmogorov spectrum in homogeneous isotropic turbulence in three dimensions using the EDQNM closure model. The transient evolution exhibits self-similarity of the second kind and has a non-trivial dynamical scaling exponent, which results in the transient spectrum having a scaling that is steeper than the Kolmogorov k(-5/3) spectrum. Attempts to detect a similar phenomenon in DNS data are inconclusive, owing to the limited range of scales available.

• 出版日期2012-2-1