242 citations · 783 across the 13 of their papers we have counts for
13 papers
Learning to flock in open space by avoiding collisions and staying together
Martino Brambati, Antonio Celani, Marco Gherardi +1
We investigate the emergence of cohesive flocking in open, boundless space using a multi-agent reinforcement learning framework. Agents integrate positional and orientational infor…
Exploring Bayesian olfactory search in realistic turbulent flows
Robin A. Heinonen, Luca Biferale, Antonio Celani +1
The problem of tracking the source of a passive scalar in a turbulent flow is relevant to flying insect behavior and several other applications. Extensive previous work has shown t…
Harvesting energy from turbulent winds with Reinforcement Learning
Lorenzo Basile, Maria Grazia Berni, Antonio Celani
Airborne Wind Energy (AWE) is an emerging technology designed to harness the power of high-altitude winds, offering a solution to several limitations of conventional wind turbines.…
Optimal trajectories for Bayesian olfactory search in turbulent flows: the low information limit and beyond
Robin A. Heinonen, Luca Biferale, Antonio Celani +1
In turbulent flows, tracking the source of a passive scalar cue requires exploiting the limited information that can be gleaned from rare, stochastic encounters with the cue. When…
How winding is the coast of Britain ? Conformal invariance of rocky shorelines
G. Boffetta, A. Celani, D. Dezzani +1
We show that rocky shorelines with fractal dimension 4/3 are conformally invariant curves by measuring the statistics of their winding angles from global high-resolution data. Such…
Inverse turbulent cascades and conformally invariant curves
D. Bernard, G. Boffetta, A. Celani +1
We offer a new example of conformal invariance far from equilibrium -- the inverse cascade of Surface Quasi-Geostrophic (SQG) turbulence. We show that temperature isolines are stat…
Dynamical Slowdown of Polymers in Laminar and Random Flows
Antonio Celani, Alberto Puliafito, Dario Vincenzi
The influence of an external flow on the relaxation dynamics of a single polymer is investigated theoretically and numerically. We show that a pronounced dynamical slowdown occurs…
Nonlinear dynamics of the viscoelastic Kolmogorov flow
A. Bistagnino, G. Boffetta, A. Celani +3
The weakly nonlinear regime of a viscoelastic Navier--Stokes fluid is investigated. For the purely hydrodynamic case, it is known that large-scale perturbations tend to the minima…
Multi-particle dispersion in fully developed turbulence
L. Biferale, G. Boffetta, A. Celani +3
The statistical geometry of dispersing Lagrangian clusters of four particles (tetrahedra) is studied by means of high-resolution direct numerical simulations of three-dimensional h…
Clustering and collisions of heavy particles in random smooth flows
J. Bec, A. Celani, M. Cencini +1
Finite-size impurities suspended in incompressible flows distribute inhomogeneously, leading to a drastic enhancement of collisions. A description of the dynamics in the full posit…
Intermittency in two-dimensional Ekman-Navier-Stokes turbulence
G. Boffetta, A. Celani, S. Musacchio +1
We study the statistics of the vorticity field in two-dimensional Navier-Stokes turbulence with a linear Ekman friction. We show that the small-scale vorticity fluctuations are int…
Statistical geometry in scalar turbulence
A. Celani, M. Vergassola
A general link between geometry and intermittency in passive scalar turbulence is established. Intermittency is qualitatively traced back to events where tracer particles stay for…
Dispersion of passive tracers in closed basins: beyond the diffusion coefficient
V. Artale, G. Boffetta, A. Celani +2
We investigate the spreading of passive tracers in closed basins. If the characteristic length scale of the Eulerian velocities is not very small compared with the size of the basi…