Fully turbulent flows are characterized by intermittent formation of very localized and intense
velocity gradients. These gradients can be orders of magnitude larger than their typical …

An essential ingredient of turbulent flows is the vortex stretching mechanism, which
emanates from the nonlinear interaction of vorticity and strain-rate tensor and leads to …

We investigate the single-point probability density function of the velocity in three-
dimensional stationary and decaying homogeneous isotropic turbulence. To this end, we …

We numerically investigate flow regimes of rotating Rayleigh-Bénard convection on a
horizontally periodic domain vertically bounded by no-slip walls from a statistical viewpoint …

For measurements taken over a decade at the coastal Danish site Høvsøre, we find the
variance associated with wind speed events from the offshore direction to exceed the …

A phenomenological theory of the fluctuations of velocity occurring in a fully developed
homogeneous and isotropic turbulent flow is presented. The focus is made on the …

This work presents evidence of the relation between the dynamics of intense events in the
dissipative range of turbulence and the energy cascade. The generalised (Hölder) means …

The detailed dynamics of small-scale turbulence are not directly accessible in large-eddy
simulations (LES), posing a modelling challenge, because many micro-physical processes …

Cellular suspensions such as dense bacterial flows exhibit a turbulence-like phase under
certain conditions. We study this phenomenon of “active turbulence” statistically by using …

The velocity circulation, a measure of the rotation of a fluid within a closed path, is a
fundamental observable in classical and quantum flows. It is indeed a Lagrangian invariant …