Federico Toschi
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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: Tracking the rotation of light magnetic particles in turbulence
Tracking the rotation of light magnetic particles in turbulence Open
Particle-laden turbulence involves complex interactions between the dispersed and continuous phases. Given that particles can exhibit a wide range of properties, such as varying density, size, and shape, their interplay with the flow can l…
View article: Dynamics of small bubbles in turbulence in non-dilute conditions
Dynamics of small bubbles in turbulence in non-dilute conditions Open
Turbulent flows laden with small bubbles are ubiquitous in many natural and industrial environments. From the point of view of numerical modeling, to be able to handle a very large number of small bubbles in direct numerical simulations, o…
View article: Flow-driven hysteresis in the transition boiling regime
Flow-driven hysteresis in the transition boiling regime Open
Transition boiling is an intermediate regime occurring between nucleate boiling, where bubbles at the surface efficiently carry heat away, and film boiling, where a layer of vapor formed over the surface insulates the system reducing heat …
View article: Digital Resources in Support of Students with Mathematical Modelling in a Challenge-Based Environment
Digital Resources in Support of Students with Mathematical Modelling in a Challenge-Based Environment Open
In this paper, we report how digital resources support engineering students in the early stages of mathematical modelling within a Challenge-Based Education (CBE) course. The study was conducted in a second-year engineering course involvin…
View article: Statistical Properties of Turbulence Under a Smart Lagrangian Forcing
Statistical Properties of Turbulence Under a Smart Lagrangian Forcing Open
We investigate how turbulence is reshaped by the presence of externally forced light particles, using high-resolution direct numerical simulations with four-way coupling. The particles are subject to an oscillatory force that in turn local…
View article: Hole Transfer Dynamics in Thin Films of Mixed‐Dimensional Quasi‐2D Perovskites
Hole Transfer Dynamics in Thin Films of Mixed‐Dimensional Quasi‐2D Perovskites Open
The understanding of charge transfer processes in mixed‐dimensional quasi‐2D perovskites is crucial for their application in high‐performance photovoltaic devices. In this work, the link between charge transport dynamics and morphology is …
View article: Vielbein Lattice Boltzmann approach for fluid flows on spherical surfaces
Vielbein Lattice Boltzmann approach for fluid flows on spherical surfaces Open
In this paper, we develop a lattice Boltzmann scheme based on the vielbein formalism for the study of fluid flows on spherical surfaces. The vielbein vector field encodes all details related to the geometry of the underlying spherical surf…
View article: Non-Hermitian wave turbulence
Non-Hermitian wave turbulence Open
Wave turbulence describes the long-time statistical behavior of out-of-equilibrium systems composed of weakly interacting waves. Non-Hermitian media ranging from open quantum systems to active materials can sustain wave propagation in so-c…
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: Kinetic data-driven approach to turbulence subgrid modeling
Kinetic data-driven approach to turbulence subgrid modeling Open
Numerical simulations of turbulent flows are well known to pose extreme computational challenges because of the huge number of dynamical degrees of freedom required to correctly describe the complex multiscale statistical correlations of t…
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: Multi-GPU porting of a phase-change cascaded lattice Boltzmann method for three-dimensional pool boiling simulations
Multi-GPU porting of a phase-change cascaded lattice Boltzmann method for three-dimensional pool boiling simulations Open
View article: The influence of macroscopic pedestrian structures on train boarding efficiency
The influence of macroscopic pedestrian structures on train boarding efficiency Open
A deeper understanding of pedestrian dynamics is essential to improve crowd flows in public spaces such as train stations. It is essential to understand both the physical and the psychological processes present in this context. However, cu…
View article: System-Phenomenology
System-Phenomenology Open
Postphenomenology and mediation theory strongly explain the micro-level interactions between human individuals and objects. Recently, humans as a collective have been added to the theory at the political macro-level, which we argue that is…
View article: Data-driven physics-based modeling of pedestrian dynamics
Data-driven physics-based modeling of pedestrian dynamics Open
Pedestrian crowds encompass a complex interplay of intentional movements aimed at reaching specific destinations, fluctuations due to personal and interpersonal variability, and interactions with each other and the environment. Previous wo…
View article: Odd Viscosity Suppresses Intermittency in Direct Turbulent Cascades
Odd Viscosity Suppresses Intermittency in Direct Turbulent Cascades Open
Intermittency refers to the broken self-similarity of turbulent flows caused by anomalous spatiotemporal fluctuations. In this Letter, we ask how intermittency is affected by a nondissipative viscosity, known as odd viscosity (also Hall vi…
View article: Divergence of Critical Fluctuations on Approaching Catastrophic Phase Inversion in Turbulent Emulsions
Divergence of Critical Fluctuations on Approaching Catastrophic Phase Inversion in Turbulent Emulsions Open
Catastrophic phase inversion, the breakdown of a concentrated emulsion characterized by the most puzzling sudden feature, is crucial in numerous industrial applications. Here we combine well-controlled experiments and fully resolved numeri…
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: Localization–delocalization transition for light particles in turbulence
Localization–delocalization transition for light particles in turbulence Open
Small bubbles in fluids rise to the surface due to Archimede’s force. Remarkably, in turbulent flows this process is severely hindered by the presence of vortex filaments, which act as moving potential wells, dynamically trapping light par…
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: Data-driven physics-based modeling of pedestrian dynamics
Data-driven physics-based modeling of pedestrian dynamics Open
Pedestrian crowds encompass a complex interplay of intentional movements aimed at reaching specific destinations, fluctuations due to personal and interpersonal variability, and interactions with each other and the environment. Previous wo…
View article: Modeling drag coefficients of spheroidal particles in rarefied flow conditions
Modeling drag coefficients of spheroidal particles in rarefied flow conditions Open
Transport of particles in flows is often modeled in a combined Eulerian-Lagrangian framework. The flow is evaluated on an Eulerian grid, while particles are modeled as Lagrangian points whose positions and velocities are evolved in time, r…
View article: Efficient point-based simulation of four-way coupled particles in turbulence at high number density
Efficient point-based simulation of four-way coupled particles in turbulence at high number density Open
In many natural and industrial applications, turbulent flows encompass some form of dispersed particles. Although this type of multiphase turbulent flow is omnipresent, its numerical modeling has proven to be a remarkably challenging probl…
View article: Coexistence of Defect Morphologies in Three-Dimensional Active Nematics
Coexistence of Defect Morphologies in Three-Dimensional Active Nematics Open
We establish how active stress globally affects the morphology of disclination lines of a three-dimensional active nematic liquid crystal under chaotic flow. Thanks to a defect detection algorithm based on the local nematic orientation, we…
View article: Investigating sociophysical attributes underlying train boarding efficiency and their importance for nudging
Investigating sociophysical attributes underlying train boarding efficiency and their importance for nudging Open
Nudging has become a popular method to change the behavior of pedestrians in public spaces. However, nudges often do not work as intended because they are based on an incomplete understanding of the nudging environment, physical (e.g., ped…
View article: Extreme statistics and extreme events in dynamical models of turbulence
Extreme statistics and extreme events in dynamical models of turbulence Open
We present a study of the intermittent properties of a shell model of turbulence with statistics of ∼10^{7} eddy turn over time, achieved thanks to an implementation on a large-scale parallel GPU factory. This allows us to quantify the ine…
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: Odd viscosity suppresses intermittency in direct turbulent cascades
Odd viscosity suppresses intermittency in direct turbulent cascades Open
Intermittency refers to the broken self-similarity of turbulent flows caused by anomalous spatio-temporal fluctuations. In this Letter, we ask how intermittency is affected by a non-dissipative viscosity, known as odd viscosity (also Hall …
View article: Kinetic data-driven approach to turbulence subgrid modeling
Kinetic data-driven approach to turbulence subgrid modeling Open
Numerical simulations of turbulent flows are well known to pose extreme computational challenges due to the huge number of dynamical degrees of freedom required to correctly describe the complex multi-scale statistical correlations of the …