109 citations · 1.3k across the 81 of their papers we have counts for
87 papers
Elastic turbulence in straight confined geometries
Giulio Foggi Rota, Daulet Izbassarov, Aditya Tekriwal +1
Elastic turbulence (ET) in straight geometries has been extensively studied in idealised configurations such as periodic shear and planar channel flow, yet experiments are typicall…
Coexisting chaos and order in micro-textured elastic flows
Giulio Foggi Rota, Ricardo Arturo Lopez de la Cruz, Simon J. Haward +2
Viscoelastic fluid flows over micro-textured surfaces - densely covered by slender protrusions like cilia lining the body airways or villi covering the intestinal epithelium - unde…
Energy transfer and scale organisation in dense canopy turbulence
Riccardo Bertoncello, Alessandro Chiarini, Giulio Foggi Rota +2
This study identifies the scale-dependent processes that sustain turbulence in dense submerged canopy flows. Using a scale-resolved energy budget, we determine where in space and a…
The ultimate state of elastic turbulence
Piyush Garg, Marco Edoardo Rosti
The asymptotic properties, with vanishing viscosity, of inertial turbulence in Newtonian fluids have been of intense scrutiny over the years. Much less is known about elastic turbu…
Elastic pseudoturbulence induced by low-Galilei settling spheres
Ludovico Fossà, Michele Macaluso, Luca Brandt +1
In this Letter, we show how a suspension of light solid spheres settling through a polymer solution results in a chaotic and highly-intermittent state. By leveraging particle-resol…
Free surfaces in turbulence - A unified framework from water surfaces to elastic solids
Giulio Foggi Rota, Andrea Mazzino, Marco Edoardo Rosti
What do the ocean surface and a swaying flag have in common? Both are deformable surfaces exhibiting chaotic motion when exposed to turbulent flows. Whether such motion is primaril…
Coherent structures in Newtonian and viscoelastic turbulent planar jets
Christian Amor, Adrián Corrochano, Giovanni Soligo +2
The addition of a small amount of long-chain polymers confers viscoelastic properties to Newtonian flows. The resulting non-Newtonian solution now exhibits different dynamics, such…
Reduced-order modeling of a viscoelastic turbulent jet with hybrid machine learning models
Christian Amor, Adrián Corrochano, Marco Edoardo Rosti +1
Adding flexible polymers to a Newtonian solvent confers complex properties to the resulting solution. The additional complexity substantially increases the computational cost of nu…
Beyond Stokes drift -- Lagrangian transport in evolving gravity waves
Tatsuo Izawa, Giulio Foggi Rota, Alessandro Chiarini +1
Finite-amplitude gravity waves at the air-water interface induce net fluid and particle transport, known as Stokes drift. While this mechanism is well understood for steady waves,…
Waves dictate the yo-yoing decay of a viscoelastic mixing layer
Giulio Foggi Rota, Piyush Garg, Jason Tang +1
We find that waves develop in a time-decaying mixing layer of viscoelastic fluid, leading the mean-flow to yo-yo. This is in sharp contrast with Newtonian fluids, where laminar mix…
Turbulent heat transfer enhancement by compliant walls
Morie Koseki, Marco Edoardo Rosti
This study investigates the effect of compliant walls on the turbulent heat transfer in channel flows over viscous-hyperelastic walls. We perform Direct Numerical Simulations, full…
Reduction of Triadic Interactions Suppresses Intermittency and Anomalous Dissipation in Turbulence
Anikat Kankaria, Ritwik Mukherjee, Sugan Durai Murugan +2
We investigate how the defining statistical features of three-dimensional turbulence respond to systematic reductions of the Fourier-space triadic interaction network. Using direct…
A suspension of heavy Kolmogorov-size spheres suppresses the inertial cascade in homogeneous and isotropic turbulence
Ludovico Fossà, Marco Edoardo Rosti
The effect of Kolmogorov-size spherical particles on homogeneous and isotropic turbulence is investigated using particle-resolved direct numerical simulations at an unladen Taylor-…
A new form of mixing in turbulent sedimentation
Simone Tandurella, Marco Edoardo Rosti, Stefano Musacchio +1
We study the sedimentation of finite-size inertial particles in a Rayleigh-Taylor-like setup using state-of-the-art direct numerical simulations. The falling particles are observed…
Dynamics of the velocity fluctuations in sedimenting suspensions of rigid fibres
Alessandro Chiarini, Emanuele Gallorini, Marco Edoardo Rosti
We use direct numerical simulations to investigate fluid-solid interactions in suspensions of rigid fibres settling under gravity in a quiescent fluid. The solid-to-fluid density r…
Effect of submerged vegetation on water surface geometry and air-water momentum transfer
Giulio Foggi Rota, Alessandro Chiarini, Marco Edoardo Rosti
Understanding how submerged vegetation modifies the water surface is crucial for modeling momentum exchange between shallow waters and the atmosphere. In particular, quantifying it…
Filament inclination effect on turbulent canopy flows
Shane Nicholas, Mohammad Omidyeganeh, Alfredo Pinelli +3
Inspired by the spontaneous behaviour observed in filamentous layers -- where the balance between flow-induced drag and structural elasticity dictates the filaments' equilibrium st…
The broken link between space and time in elastic turbulence
Giulio Foggi Rota, Rahul K. Singh, Alessandro Chiarini +4
Elastic turbulence (ET), observed in flows of sufficiently elastic polymer solution at small inertia, is characterized by chaotic motions and power-law scaling of energy spectrum (…
Understanding the effect of wall elasticity in turbulent channel flows
M. Koseki, M. S. Aswathy, M. E. Rosti
This study compares turbulent channel flows over elastic walls with those over rough walls, to explore the role of the dynamic change of shape of the wall on turbulence. The compar…
Edge-effects in the turbulent flow over flexible aquatic vegetation
Giulio Foggi Rota, Elisa Tressoldi, Francesco Avallone +1
Riparian vegetation along riverbanks and seagrass along coastlines interact with water currents, significantly altering their flow. To characterise the turbulent fluid motion along…
Elastic turbulence hides in the small scales of inertial polymeric turbulence
Piyush Garg, Marco Edoardo Rosti
Gaining a fundamental understanding of turbulent flows of dilute polymer solutions has been a challenging and outstanding problem for a long time. In this letter, we examine homoge…
The effect of shear-thinning on the scalings and small-scale structures of turbulence
Marco Edoardo Rosti
We study the homogeneous isotropic turbulence of a shear-thinning fluid modeled by the Carreau model and show how the variable viscosity affects the multiscale behaviour of the tur…
Bubbles-induced transition to elasto-inertial turbulence
Hafiz Usman Naseer, Daulet Izbassarov, Marco Edoardo Rosti +1
Interface-resolved direct numerical simulations are performed to investigate bubble-induced transition from laminar to elasto-inertial turbulent (EIT) state in a pressure-driven vi…
Reconfiguration and dynamics of clamped fibers under finite-amplitude surface gravity waves
Giulio Foggi Rota, Alessandro Chiarini, Marco Edoardo Rosti
We investigate the behaviour of a flexible stem completely submerged under a surface gravity wave of finite amplitude using fully resolved direct numerical simulations. By varying…