Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Istituto Nazionale di Fisica Nucleare, Roma Tor VergataIT2.7k papers
- Centre National de la Recherche ScientifiqueFR2.4k papers
- Sapienza University of RomeIT2.3k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT2.1k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.9k papers
- University of CambridgeGB1.7k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PisaIT1.6k papers
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiIT1.6k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.6k papers
- University of GlasgowGB1.5k papers
- University of PisaIT1.5k papers
- University of EdinburghGB1.5k papers
25 papers · 2 filters
Finding Efficient Swimming Strategies in a Three Dimensional Chaotic Flow by Reinforcement Learning
K. Gustavsson, L. Biferale, A. Celani +1
We apply a reinforcement learning algorithm to show how smart particles can learn approximately optimal strategies to navigate in complex flows. In this paper we consider microswim…
Controlling heat transport and flow structures in thermal turbulence using ratchet surfaces
Hechuan Jiang, Xiaojue Zhu, Varghese Mathai +3
In this combined experimental and numerical study on thermally driven turbulence in a rectangular cell, the global heat transport and the coherent flow structures are controlled wi…
Two-Scalar Turbulent Rayleigh-Benard Convection: Numerical Simulations and Unifying Theory
Yantao Yang, Roberto Verzicco, Detlef Lohse
We conduct direct numerical simulations for turbulent Rayleigh-Bénard (RB) convection, driven simultaneously by two scalar components (say, temperature and salt concentration) with…
Dynamics of partially thermalized solutions of the Burgers equation
P. Clark di Leoni, P. D. Mininni, M. -E. Brachet
The spectrally truncated, or finite dimensional, versions of several equations of inviscid flows display transient solutions which match their viscous counterparts, but which event…
Finite temperature effects in helical quantum turbulence
P. Clark di Leoni, P. D. Mininni, M. -E. Brachet
We perform a study on the evolution of helical quantum turbulence at different temperatures by solving numerically the Gross-Pitaevskii and the Stochastic Ginzburg-Landau equations…
Energy transfer in turbulence under rotation
Michele Buzzicotti, Hussein Aluie, Luca Biferale +1
It is known that rapidly rotating turbulent flows are characterized by the emergence of simultaneous upscale and downscale energy transfer. Indeed, both numerics and experiments sh…
Smart Inertial Particles
Simona Colabrese, Kristian Gustavsson, Antonio Celani +1
We performed a numerical study to train smart inertial particles to target specific flow regions with high vorticity through the use of reinforcement learning algorithms. The parti…
Lattice Boltzmann simulations of droplet dynamics in time-dependent flows
F. Milan, M. Sbragaglia, L. Biferale +1
We study the deformation and dynamics of droplets in time-dependent flows using 3D numerical simulations of two immiscible fluids based on the lattice Boltzmann model (LBM). Analyt…
Energy Cascade and Intermittency in Helically Decomposed Navier-Stokes Equations
Ganapati Sahoo, Luca Biferale
We study the nature of the triadic interactions in Fourier space for three-dimensional Navier-Stokes equations based on the helicity content of the participating modes. Using the t…
Statistics of turbulence in the energy-containing range of Taylor-Couette compared to canonical wall-bounded flows
Dominik Krug, Xiang I. A. Yang, Charitha M. de Silva +4
Considering structure functions of the streamwise velocity component in a framework akin to the extended self-similarity hypothesis (ESS), de Silva \textit{et al.} (\textit{J. Flui…
Deformable ellipsoidal bubbles in Taylor-Couette flow with enhanced Euler-Lagrange tracking
Vamsi Spandan, Roberto Verzicco, Detlef Lohse
In this work we present numerical simulations of sub-Kolmogorov deformable bubbles dispersed in Taylor-Couette flow (a wall-bounded shear system) with rotating inner cylinde…
A closure theory for the split energy-helicity cascades in homogeneous isotropic homochiral turbulence
Antoine Briard, Luca Biferale, Thomas Gomez
We study the energy transfer properties of three dimensional homogeneous and isotropic turbulence where the non-linear transfer is altered in a way that helicity is made sign-defin…
Effect of filter type on the statistics of energy transfer between resolved and subfilter scales from a-priori analysis of direct numerical simulations of isotropic turbulence
M. Buzzicotti, M. Linkmann, H. Aluie +3
The effects of different filtering strategies on the statistical properties of the resolved-to-sub-filter scale (SFS) energy transfer are analyzed in forced homogeneous and isotrop…
From two-dimensional to three-dimensional turbulence through two-dimensional three-component flows
L. Biferale, M. Buzzicotti, M. Linkmann
The relevance of two-dimensional three-components (2D3C) flows goes well beyond their occurrence in nature, and a deeper understanding of their dynamics might be also helpful in or…
AFiD-GPU: a versatile Navier-Stokes Solver for Wall-Bounded Turbulent Flows on GPU Clusters
Xiaojue Zhu, Everett Phillips, Vamsi Spandan +9
The AFiD code, an open source solver for the incompressible Navier-Stokes equations ({\color{blue}\burl{http://www.afid.eu}}), has been ported to GPU clusters to tackle large-scale…
Roughness-facilitated local 1/2 scaling does not imply the onset of the ultimate regime of thermal convection
Xiaojue Zhu, Richard J. A. M. Stevens, Roberto Verzicco +1
In thermal convection, roughness is often used as a means to enhance heat transport, expressed in Nusselt number. Yet there is no consensus on whether the Nusselt vs. Rayleigh numb…
Life stages of wall-bounded decay of Taylor-Couette turbulence
Rodolfo Ostilla-Mónico, Xiaojue Zhu, Vamsi Spandan +2
The decay of Taylor-Couette turbulence, i.e~the flow between two coaxial and independently rotating cylinders, is numerically studied by instantaneously stopping the forcing from a…
Comparison of forcing functions in magnetohydrodynamic turbulence
Mairi E. McKay, Moritz Linkmann, Daniel Clark +2
Results are presented of direct numerical simulations of incompressible, homogeneous magnetohydrodynamic turbulence without a mean magnetic field, subject to different mechanical f…
Confined Rayleigh-Bénard, Rotating Rayleigh-Bénard, and Double Diffusive Convection: A unifying view on turbulent transport enhancement through coherent structure manipulation
Kai Leong Chong, Yantao Yang, Shi-Di Huang +5
Many natural and engineering systems are simultaneously subjected to a driving force and a stabilizing force. The interplay between the two forces, especially for highly nonlinear…
Mixed insulating and conducting thermal boundary conditions in Rayleigh-Bénard convection
Dennis Bakhuis, Rodolfo Ostilla-Mónico, Erwin P. van der Poel +2
A series of direct numerical simulations of Rayleigh-Bénard convection, the flow in a fluid layer heated from below and cooled from above, were conducted to investigate the effect…
Triad interactions and the bidirectional turbulent cascade of magnetic helicity
Moritz Linkmann, Vassilios Dallas
Using direct numerical simulations we demonstrate that magnetic helicity exhibits a bidirectional turbulent cascade at high but finite magnetic Reynolds numbers. Despite the inject…
Reynolds-number dependence of the dimensionless dissipation rate in homogeneous magnetohydrodynamic turbulence
Moritz Linkmann, Arjun Berera, Erin E. Goldstraw
This paper examines the behavior of the dimensionless dissipation rate for stationary and nonstationary magnetohydrodynamic (MHD) turbulence in presence of extern…
Lagrangian Statistics for Navier-Stokes Turbulence under Fourier-mode reduction: Fractal and Homogeneous Decimations
Michele Buzzicotti, Akshay Bhatnagar, Luca Biferale +2
We study small-scale and high-frequency turbulent fluctuations in three-dimensional flows under Fourier-mode reduction. The Navier-Stokes equations are evolved on a restricted set…
Flow Navigation by Smart Microswimmers via Reinforcement Learning
Simona Colabrese, Kristian Gustavsson, Antonio Celani +1
Smart active particles can acquire some limited knowledge of the fluid environment from simple mechanical cues and exert a control on their preferred steering direction. Their goal…