2003/11/30 by L. Chevillard, Laurent Chevillard, Bernard Castaing +3 · 2 citations
Engineering · Physics and Astronomy · #Aerodynamics and Acoustics in Jet Flows #Fluid Dynamics and Turbulent Flows #Particle Dynamics in Fluid Flows #cond-mat.stat-mech
paper · pdf · doi:10.1140/epjb/e2005-00214-4
published as Eur. Phys. J. B 45, 561-567 (2005) · 7 pages, 7 figures, to appear in EPJB
openalex publication_date 2005/06/01 · arxiv created 2005/07/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Intermittency, measured as log(F(r)/3), where F(r) is the flatness of velocity increments at scale r, is found to rapidly increase as viscous effects intensify, and eventually saturate at very small scales. This feature defines a finite intermediate range of scales between the inertial and dissipation ranges, that we shall call near-dissipation range. It is argued that intermittency is multiplied by a universal factor, independent of the Reynolds number Re, throughout the near-dissipation range. The (logarithmic) extension of the near-dissipation range varies as √(log Re). As a consequence, scaling properties of velocity increments in the near-dissipation range strongly depend on the Reynolds number.