On the rapid increase of intermittency in the near-dissipation range of fully developed turbulence

Intermittency, measured as , where F(r) is the flatness of velocityincrements at scale r, is found to rapidly increase as viscouseffects intensify, and eventually saturate at very small scales.This feature defines a finite intermediate range ofscales between the inertial and dissipation ranges, that we shallcall near-dissipation range. It is argued that intermittency ismultiplied by a universal factor, independent of the Reynoldsnumber Re, throughout the near-dissipation range. The(logarithmic) extension of the near-dissipation range varies as. As a consequence, scaling properties of velocityincrements in the near-dissipation range strongly depend on the Reynolds number.