127 citations · 577 across the 28 of their papers we have counts for
8 papers · 1 filter
Gyrotactic phytoplankton in laminar and turbulent flows: a dynamical systems approach
Massimo Cencini, Guido Boffetta, Matteo Borgnino +1
Gyrotactic algae are bottom heavy, motile cells whose swimming direction is determined by a balance between a buoyancy torque directing them upwards and fluid velocity gradients. G…
A statistical conservation law in two and three dimensional turbulent flows
Anna Frishman, Guido Boffetta, Filippo De Lillo +1
Particles in turbulence live complicated lives. It is nonetheless sometimes possible to find order in this complexity. It was proposed in [Falkovich et al., Phys. Rev. Lett. 110, 2…
Clustering of gyrotactic microorganisms in turbulent flows
Filippo De Lillo, Guido Boffetta, Massimo Cencini
We study the spatial distribution of gyrotactic microorganisms transported by a three-dimensional turbulent flow generated by direct numerical simulations. We find that gyrotaxis c…
Control of particle clustering in turbulence by polymer additives
F. De Lillo, G. Boffetta, S. Musacchio
We study the clustering properties of inertial particles in a turbulent viscoelastic fluid. The investigation is carried out by means of direct numerical simulations of turbulence…
Nonlinear diffusion model for Rayleigh-Taylor mixing
G. Boffetta, F. De Lillo, S. Musacchio
The complex evolution of turbulent mixing in Rayleigh-Taylor convection is studied in terms of eddy diffusiviy models for the mean temperature profile. It is found that a non-linea…
Peripheral mixing of passive scalar at small Reynolds number
G. Boffetta, F. De Lillo, A. Mazzino
Mixing of a passive scalar in the peripheral region close to a wall is investigated by means of accurate direct numerical simulations of both a three-dimensional Couette channel fl…
Lagrangian Statistics and Temporal Intermittency in a Shell Model of Turbulence
G. Boffetta, F. De Lillo, S. Musacchio
We study the statistics of single particle Lagrangian velocity in a shell model of turbulence. We show that the small scale velocity fluctuations are intermittent, with scaling exp…
Inverse cascade in Charney-Hasegawa-Mima turbulence
G. Boffetta, F. De Lillo, S. Musacchio
The inverse energy cascade in Charney-Hasegawa-Mima turbulence is investigated. Kolmogorov law for the third order velocity structure function is shown to be independent on the Ros…