492 citations · 9.4k across the 216 of their papers we have counts for
46 papers · 1 filter
Zermelo's problem: Optimal point-to-point navigation in 2D turbulent flows using Reinforcement Learning
Luca Biferale, Fabio Bonaccorso, Michele Buzzicotti +2
To find the path that minimizes the time to navigate between two given points in a fluid flow is known as Zermelo's problem. Here, we investigate it by using a Reinforcement Learni…
Discontinuous transition from direct to inverse cascade in three-dimensional turbulence
Ganapati Sahoo, Alexandros Alexakis, Luca Biferale
Inviscid invariants of flow equations are crucial in determining the direction of the turbulent energy cascade. In this work we investigate a variant of the three dimensional Navie…
Role of helicity for large- and small-scale turbulent fluctuations
Ganapati Sahoo, Fabio Bonaccorso, Luca Biferale
The effect of the helicity on the dynamics of the turbulent flows is investigated. The aim is to disentangle the role of helicity in fixing the direction, the intensity and the flu…
High resolution numerical study of Rayleigh-Taylor turbulence using a thermal lattice Boltzmann scheme
L. Biferale, F. Mantovani, M. Sbragaglia +3
We present results of a high resolution numerical study of two dimensional (2d) Rayleigh-Taylor turbulence using a recently proposed thermal lattice Boltzmann method (LBT). The goa…
Lattice Boltzmann Methods for thermal flows: continuum limit and applications to compressible Rayleigh-Taylor systems
Andrea Scagliarini, Luca Biferale, Mauro Sbragaglia +2
We compute the continuum thermo-hydrodynamical limit of a new formulation of lattice kinetic equations for thermal compressible flows, recently proposed in [Sbragaglia et al., J. F…
Fully developed turbulence and the multifractal conjecture
R. Benzi, L. Biferale
We review the Parisi-Frisch MultiFractal formalism for Navier--Stokes turbulence with particular emphasis on the issue of statistical fluctuations of the dissipative scale. We do i…
Universal intermittent properties of particle trajectories in highly turbulent flows
ICTR, :, A. Arneodo +27
We present a collection of eight data sets, from state-of-the-art experiments and numerical simulations on turbulent velocity statistics along particle trajectories obtained in dif…
Intermittency and Universality in Fully-Developed Inviscid and Weakly-Compressible Turbulent Flows
Roberto Benzi, Luca Biferale, Robert Fisher +3
We performed high resolution numerical simulations of homogenous and isotropic compressible turbulence, with an average 3D Mach number close to 0.3. We study the statistical proper…
Lagrangian Structure Functions in Turbulence: A Quantitative Comparison between Experiment and Direct Numerical Simulation
L. Biferale, E. Bodenschatz, M. Cencini +4
A detailed comparison between data from experimental measurements and numerical simulations of Lagrangian velocity structure functions in turbulence is presented. By integrating in…
Multi-scale model of gradient evolution in turbulent flows
Luca Biferale, Laurent Chevillard, Charles Meneveau +1
A multi-scale model for the evolution of the velocity gradient tensor in fully developed turbulence is proposed. The model is based on a coupling between a ``Restricted Euler'' dyn…
Heavy particle concentration in turbulence at dissipative and inertial scales
J. Bec, L. Biferale, M. Cencini +3
Spatial distributions of heavy particles suspended in an incompressible isotropic and homogeneous turbulent flow are investigated by means of high resolution direct numerical simul…
Lyapunov exponents of heavy particles in turbulence
Jeremie Bec, Luca Biferale, Guido Boffetta +3
Lyapunov exponents of heavy particles and tracers advected by homogeneous and isotropic turbulent flows are investigated by means of direct numerical simulations. For large values…
On the effects of vortex trapping on the velocity statistics of tracers and heavy particle in turbulent flows
Jeremie Bec, Luca Biferale, Massimo Cencini +2
The Lagrangian statistics of heavy particles and of fluid tracers transported by a fully developed turbulent flow are investigated by means of high resolution direct numerical simu…
Mesoscopic modeling of a two-phase flow in the presence of boundaries: the Contact Angle
R. Benzi, L. Biferale, M. Sbragaglia +2
We present a mesoscopic model, based on the Boltzmann Equation, for the interaction between a solid wall and a non-ideal fluid. We present an analytic derivation of the contact ang…
On the Anomalous Scaling Exponents in Nonlinear Models of Turbulence
Luiza Angheluta, Roberto Benzi, Luca Biferale +2
We propose a new approach to the old-standing problem of the anomaly of the scaling exponents of nonlinear models of turbulence. We achieve this by constructing, for any given nonl…
Dynamics and statistics of heavy particles in turbulent flows
M. Cencini, J. Bec, L. Biferale +5
We present the results of Direct Numerical Simulations (DNS) of turbulent flows seeded with millions of passive inertial particles. The maximum Taylor's Reynolds number is around 2…
Acceleration statistics of heavy particles in turbulence
J. Bec, L. Biferale, G. Boffetta +5
We present the results of direct numerical simulations of heavy particle transport in homogeneous, isotropic, fully developed turbulence, up to resolution (…
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…
Joint statistics of acceleration and vorticity in fully developed turbulence
Luca Biferale, Federico Toschi
We report results from a high resolution numerical study of fluid particles transported by a fully developed turbulent flow. Single particle trajectories were followed for a time r…
Mesoscopic modeling of heterogeneous boundary conditions for microchannel flows
R. Benzi, L. Biferale, M. Sbragaglia +2
We present a mesoscopic model of the fluid-wall interactions for flows in microchannel geometries. We define a suitable implementation of the boundary conditions for a discrete ver…
Lagrangian statistics of particle pairs in homogeneous isotropic turbulence
L. Biferale, G. Boffetta, A. Celani +3
We present a detailed investigation of the particle pair separation process in homogeneous isotropic turbulence. We use data from direct numerical simulations up to Taylor's Reynol…
Acceleration and vortex filaments in turbulence
F. Toschi, L. Biferale, G. Boffetta +3
We report recent results from a high resolution numerical study of fluid particles transported by a fully developed turbulent flow. Single particle trajectories were followed for a…
Dynamical scaling and intermittency in shell models of turbulence
R. Benzi, L. Biferale, M. Sbragaglia
We introduce a model for the turbulent energy cascade aimed at studying the effect of dynamical scaling on intermittency. In particular, we show that by slowing down the energy tra…
A lattice Boltzmann study of non-hydrodynamic effects in shell models of turbulence
R. Benzi, L. Biferale, M. Sbragaglia +2
A lattice Boltzmann scheme simulating the dynamics of shell models of turbulence is developed. The influence of high order kinetic modes (ghosts) on the dissipative properties of t…