2006/02/28 by Pablo D. Mininni, P. D. Mininni, Alexandros Alexakis +2 · 120 citations
Engineering · Environmental Science · Mathematics · Physics and Astronomy · #Fluid Dynamics and Turbulent Flows #Intermittency #Mathematics #Mechanics #Nonlinear system #Physics #Plant Water Relations and Carbon Dynamics #Probability density function #Scale (ratio) #Statistical physics #Statistics #Turbulence #Universality (dynamical systems) #Wind and Air Flow Studies #physics.flu-dyn
paper · pdf · doi:10.1103/physreve.74.016303
published in Physical Review E 74(1), 016303 (American Physical Society)
arxiv created 2006/05/19 · openalex publication_date 2006/07/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The effect of large scales on the statistics and dynamics of turbulent fluctuations is studied using data from high resolution direct numerical simulations. Three different kinds of forcing, and spatial resolutions ranging from 256(3) to 1024(3), are being used. The study is carried out by investigating the nonlinear triadic interactions in Fourier space, transfer functions, structure functions, and probability density functions. Our results show that the large scale flow plays an important role in the development and the statistical properties of the small scale turbulence. The role of helicity is also investigated. We discuss the link between these findings and intermittency, deviations from universality, and possible origins of the bottleneck effect. Finally, we briefly describe the consequences of our results for the subgrid modeling of turbulent flows.