13 papers · 1 filter
Dynamical hysteresis in the dissipation in turbulent flows
M. Ahmad, P. D. Mininni, M. Obligado +1
We present evidence of the dynamical hysteretic nature of dissipation in unsteady turbulent flows. Wind tunnel experiments and direct numerical simulations in oscillating flows sho…
Scaling laws and local enhancements of buoyancy flux in stratified turbulent flows
Gyeongseob Song, Fabio Feraco, Raffaele Marino +6
In the presence of stratification, turbulent flows exhibit intermittency not only at small scales but also at large scales, comparable to the mean flow, as observed in the atmosphe…
Helicity subgrid-scale models and their numerical validation
Nobumitsu Yokoi, Pablo D. Mininni, Annick Pouquet +2
Large-eddy simulations (LES) with an appropriate subgrid-scale (SGS) model provide a powerful tool for investigating real-world turbulence. The Smagorinsky model, one of the simple…
Chirality tomography: measuring local helicity from trajectory linking
Manuel Noseda, Bernardo Luciano Español, Pablo Daniel Mininni +1
We present the first three-dimensional helicity maps of fully developed turbulence obtained through chirality tomography, a Lagrangian voxel-based method that reconstructs helicity…
Non-equilibrium formulation for inertial particles in turbulent swirling flows
Bernardo L. Español, Martin Obligado, Joachim Peinke +3
We study the dynamics of inertial particles in turbulence using datasets obtained from both direct numerical simulations and laboratory experiments of turbulent swirling flows. By…
Stability of vortex lattices in rotating flows
Julián Amette Estrada, Alexandros Alexakis, Marc E. Brachet +1
Vortex lattices -- highly ordered arrays of vortices -- are known to arise in quantum systems such as type II superconductors and Bose-Einstein condensates. More recently, similar…