8 papers · 1 filter
Intermittency in Shell Models of Turbulent Cascades: from Single-Branch to Multi-Branch
Flavio Tuteri, Sergio Chibbaro, Alexandros Alexakis
Intermittency is one of the central features of turbulent transfer: the multi-scale energy cascade is mediated by rare and intense fluctuations. We investigate this phenomenon in a…
Sub-Kolmogorov Intermittency and Multifractal Dissipation in Multiphase Turbulence
Marco Crialesi-Esposito, Alienor Riviere, Sergio Chibbaro
Multiphase turbulence displays stronger intermittency than its single-phase counterpart, yet the origin and geometrical organization of its most intense small-scale fluctuations re…
Two-point enstrophy dynamics in homogeneous isotropic turbulence
Gabriele Boga, Carlos B. da Silva, Sergio Chibbaro +1
In the present work we investigate the multiscale dynamics of enstrophy in homogeneous isotropic turbulence by exploiting the two-point formalism provided by the Kármán-Howarth-M…
Turbulent pair dispersion with Stochastic Generative Diffusion Models
Andrei Pantea, Luca Biferale, Michele Buzzicotti +3
Recent advances in data-driven modeling have shown that diffusion models can successfully generate synthetic Lagrangian trajectories in turbulent flows. Building on this progress,…
Multi-branch Shell Models of Two-Dimensional Turbulence exhibit Dual Energy-Enstrophy Cascades
Flavio Tuteri, Sergio Chibbaro, Alexandros Alexakis
Classical shell models of turbulence do not display dual cascade - inverse of energy and direct of enstrophy - because they fail to reproduce the right thermal spectra. We propose…
Ensemble of Fixed Points in Multi-branch Shell Models of Turbulent Cascades
Flavio Tuteri, Sergio Chibbaro, Alexandros Alexakis
Stationary solutions of a shell model of turbulence defined on a dyadic tree topology are studied. Each node's amplitude is expressed as the product of amplitude multipliers associ…