242 citations · 783 across the 13 of their papers we have counts for
8 papers · 1 filter
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…