Roberto Benzi
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View article: Stochastic resonance of rotating particles in turbulence
Stochastic resonance of rotating particles in turbulence Open
The chaotic dynamics of small-scale vorticity plays a key role in understanding and controlling turbulence, with direct implications for energy transfer, mixing, and coherent structure evolution. However, measuring or controlling its dynam…
View article: Role of interfacial stabilization in the Rayleigh-Bénard convection of liquid-liquid dispersions
Role of interfacial stabilization in the Rayleigh-Bénard convection of liquid-liquid dispersions Open
Based on mesoscale lattice Boltzmann numerical simulations, we characterize the Rayleigh-Bénard (RB) convective dynamics of dispersions of liquid droplets in another liquid phase. Our numerical methodology allows us to modify the droplets'…
View article: Instabilities and turbulence in extensile swimmer suspensions
Instabilities and turbulence in extensile swimmer suspensions Open
We study low Reynolds number turbulence in a suspension of polar, extensile, self-propelled inertial swimmers. We review the bend and splay mechanisms that destabilize an ordered flock. The suspension is always unstable to bend perturbatio…
View article: Non-reciprocal coalescence-breakup dynamics in concentrated emulsions
Non-reciprocal coalescence-breakup dynamics in concentrated emulsions Open
Dense stabilized emulsions are mixtures of immiscible fluids where the high-volume fraction droplet dispersed phase is stabilized against coalescence by steric interactions. The production of emulsions involves high-shear flows and it is w…
View article: Self-consistent moment dynamics for networks of spiking neurons
Self-consistent moment dynamics for networks of spiking neurons Open
A novel approach to moment closure problem is used to derive low dimensional laws for the dynamics of the moments of the membrane potential distribution in a population of spiking neurons. Using spectral expansion of the density equation w…
View article: Acceleration of Lagrangian Particles in Shell Models of Turbulence
Acceleration of Lagrangian Particles in Shell Models of Turbulence Open
Lagrangian acceleration has been investigated both experimentally and numerically in the past, and it has been shown to exhibit extreme fluctuations, which have been rationalized as events in which tracer particles get trapped into vortica…
View article: Dynamical regimes of thermally convective emulsions
Dynamical regimes of thermally convective emulsions Open
Emulsions are paramount in various interdisciplinary topical areas, yet a satisfactory understanding of their behavior in buoyancy-driven thermal flows has not been established. In the present work, we unravel the dynamical regimes of ther…
View article: Dynamical regimes of thermally convective emulsions
Dynamical regimes of thermally convective emulsions Open
Emulsions are paramount in various interdisciplinary topical areas, yet a satisfactory understanding of their behavior in buoyancy-driven thermal flows has not been established. In the present work, we unravel the dynamical regimes of ther…
View article: Stochastic resonance of rotating particles in turbulence
Stochastic resonance of rotating particles in turbulence Open
The chaotic dynamics of small-scale vorticity plays a key role in understanding and controlling turbulence, with direct implications for energy transfer, mixing, and coherent structure evolution. However, measuring or controlling its dynam…
View article: Turbulent mixing controls fixation of growing antagonistic populations
Turbulent mixing controls fixation of growing antagonistic populations Open
Unlike coffee and cream that homogenize when stirred, growing micro-organisms (e.g., bacteria, baker’s yeast) can actively kill each other and avoid mixing. How do such antagonistic interactions impact the growth and survival of competing …
View article: Intermittent Thermal Convection in Jammed Emulsions
Intermittent Thermal Convection in Jammed Emulsions Open
We study the process of thermal convection in jammed emulsions with a yield-stress rheology. We find that heat transfer occurs via an intermittent mechanism, whereby intense short-lived convective "heat bursts" are spaced out by long-lasti…
View article: Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions
Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions Open
Soft amorphous materials are viscoelastic solids ubiquitously found around us, from clays and cementitious pastes to emulsions and physical gels encountered in food or biomedical engineering. Under an external deformation, these materials …
View article: Turbulent mixing controls fixation of growing antagonistic populations
Turbulent mixing controls fixation of growing antagonistic populations Open
Unlike coffee and cream that homogenize when stirred, growing micro-organisms (e.g., bacteria, baker's yeast) can actively kill each other and avoid mixing. How do such antagonistic interactions impact the growth and survival of competing …
View article: Lagrangian statistics of concentrated emulsions
Lagrangian statistics of concentrated emulsions Open
The dynamics of stabilised concentrated emulsions presents a rich phenomenology including chaotic emulsification, non-Newtonian rheology and ageing dynamics at rest. Macroscopic rheology results from the complex droplet microdynamics and, …
View article: Intermittent thermal convection in jammed emulsions
Intermittent thermal convection in jammed emulsions Open
We study the process of thermal convection in jammed emulsions with a yield-stress rheology. We find that heat transfer occurs via an intermittent mechanism, whereby intense short-lived convective "heat bursts" are spaced out by long-lasti…
View article: Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions
Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions Open
The manuscript offers a critical perspective on the shear-induced solid-to-liquid transition in amorphous materials, synthesizing insights from the talks and informal discussions that unfolded during a week of vibrant exchange at the Loren…
View article: Why (Still) Studying Turbulence in Fluids and Plasmas?
Why (Still) Studying Turbulence in Fluids and Plasmas? Open
Turbulence, a captivating and intricate phenomenon, continues to attract researchers across diverse scientific disciplines. Despite considerable efforts, turbulence remains a fascinating challenge and stands as one of the unsolved enigmas …
View article: Direct observations of causal links in plastic events and relevance to earthquake seismology
Direct observations of causal links in plastic events and relevance to earthquake seismology Open
Earthquakes are complex physical processes driven by stick-slip motion on a sliding fault. After the main event, a series of aftershocks is usually observed. The latter are loosely defined as earthquakes that follow a parent event and occu…
View article: Lagrangian statistics of dense emulsions
Lagrangian statistics of dense emulsions Open
The dynamics of dense stabilized emulsions presents a rich phenomenology including chaotic emulsification, non-Newtonian rheology and ageing dynamics at rest. Macroscopic rheology results from the complex droplet microdynamics and, in turn…
View article: Data and code: Oceanic frontal divergence alters phytoplankton competition and distribution
Data and code: Oceanic frontal divergence alters phytoplankton competition and distribution Open
Data and codes for the publication "Oceanic frontal divergence alters phytoplankton competition and distribution''
View article: Data and code: Oceanic frontal divergence alters phytoplankton competition and distribution
Data and code: Oceanic frontal divergence alters phytoplankton competition and distribution Open
Data and codes for the publication "Oceanic frontal divergence alters phytoplankton competition and distribution''
View article: Lectures on turbulence
Lectures on turbulence Open
Fluid dynamics turbulence refers to the chaotic and unpredictable dynamics of flows. Despite the fact that the equations governing the motion of fluids are known since more than two centuries, a comprehensive theory of turbulence is still …
View article: Continuum modeling of soft glassy materials under shear
Continuum modeling of soft glassy materials under shear Open
Soft Glassy Materials (SGM) consist in dense amorphous assemblies of colloidal particles of multiple shapes, elasticity, and interactions, which confer upon them solid-like properties at rest. They are ubiquitously encountered in modern en…
View article: Direct observations of causal links in plastic events validates statistical analysis tools for seismology
Direct observations of causal links in plastic events validates statistical analysis tools for seismology Open
Earthquakes are complex physical processes driven by the stick-slip motion of a sliding fault. After the main quake, a series of aftershocks typically follows. These are loosely defined as events that follow a given event and occur within …
View article: Reconciling Parker Solar Probe Observations and Magnetohydrodynamic Theory
Reconciling Parker Solar Probe Observations and Magnetohydrodynamic Theory Open
The Parker Solar Probe mission provides a unique opportunity to characterize several features of the solar wind at different heliocentric distances. Recent findings have shown a transition in the inertial range spectral and scaling propert…
View article: Continuum modeling of Soft Glassy Materials under shear
Continuum modeling of Soft Glassy Materials under shear Open
Soft Glassy Materials (SGM) consist in dense amorphous assemblies of colloidal particles of multiple shapes, elasticity, and interactions, which confer upon them solid-like properties at rest. They are ubiquitously encountered in modern en…
View article: Spatial population genetics with fluid flow
Spatial population genetics with fluid flow Open
The growth and evolution of microbial populations is often subjected to advection by fluid flows in spatially extended environments, with immediate consequences for questions of spatial population genetics in marine ecology, planktonic div…
View article: Multifractal approach to fully developed turbulence
Multifractal approach to fully developed turbulence Open
The multifractal description of complex phenomena has been introduced in the first half of the 1980s for the characterization of the anomalous scaling of the fully developed turbulence and the structure of the chaotic attractors. From a te…
View article: Reconciling Parker Solar Probe observations and magnetohydrodynamic theory
Reconciling Parker Solar Probe observations and magnetohydrodynamic theory Open
The Parker Solar Probe mission provides a unique opportunity to characterize several features of the solar wind at different heliocentric distances. Recent findings have shown a transition in the inertial range spectral and scaling propert…
View article: Build up of yield stress fluids via chaotic emulsification
Build up of yield stress fluids via chaotic emulsification Open
Stabilized dense emulsions display a rich phenomenology connecting\nmicrostructure and rheology. In this work we study how an emulsion with a\nfinite yield stress can be built via large-scale stirring. By gradually\nincreasing the volume f…