Understanding and predicting turbulent flow phenomena remain a challenge for both theory
and applications. The nonlinear and nonlocal character of small-scale turbulence can be …

Turbulence in fluid flows is characterized by a wide range of interacting scales. Since the
scale range increases as some power of the flow Reynolds number, a faithful simulation of …

Intense fluctuations of energy dissipation rate in turbulent flows result from the self-
amplification of strain rate via a quadratic nonlinearity, with contributions from vorticity (via …

Reduced models describing the Lagrangian dynamics of the velocity gradient tensor (VGT)
in homogeneous isotropic turbulence (HIT) are developed under the physics-informed …

The statistics of the velocity gradient tensor in turbulent flows is of both theoretical and
practical importance. The Lagrangian view provides a privileged perspective for studying the …

We investigate the role of pressure, via its Hessian tensor ${\boldsymbol {H}} $, on
amplification of vorticity and strain-rate and contrast it with other inviscid nonlinear …

Numerical and experimental turbulence simulations are nowadays reaching the size of the
so-called big data, thus requiring refined investigative tools for appropriate statistical …

The scaling of turbulent motions is investigated by considering the flow in the eigenframe of
the local strain-rate tensor. The flow patterns in this frame of reference are evaluated using …

We use high-resolution velocity measurements in a jet-stirred zero-mean-flow facility to
investigate the topology and energy transfer properties of homogeneous turbulence over the …

Amplification of velocity gradients, a key feature of turbulent flows, is affected by the non-
local character of the incompressible fluid equations expressed by the second derivative …