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 …

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

Small-scale turbulence can be comprehensively described in terms of velocity gradients,
which makes them an appealing starting point for low-dimensional modeling. Typical …

The effects of porosity on the kinematics of porous disks are investigated experimentally. A
new falling motion is identified, namely, spiral irregular motion, which is characterized by the …

The collisions in a dilute polydisperse suspension of sub-Kolmogorov spheres with
negligible inertia settling in a turbulent flow and interacting through hydrodynamics including …

Stirring a fluid through a Gaussian forcing at a vanishingly small Reynolds number produces
a Gaussian random field, while flows at higher Reynolds numbers exhibit non-Gaussianity …

Statistical properties of circulation encode relevant information about the multiscale structure
of turbulent cascades. Recent massive computational efforts have posed challenging …

Velocity gradient tensor, is then exploited to derive a model based on a modified Ornstein–
Uhlenbeck process. These models are developed using data-driven strategies employing …

Expressing the evolution equations for the filtered velocity gradient tensor (FVGT) in the
strain-rate eigenframe provides an insightful way to disentangle and understand various …

We propose a model for the acceleration of micro-bubbles (smaller than the dissipative
scale of the flow) subjected to the drag and fluid inertia forces in a homogeneous and …