36 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Université de LilleFR23 papers
- École Centrale de LilleFR20 papers
- Centre National de la Recherche ScientifiqueFR18 papers
- Arts et MétiersFR15 papers
- Imperial College LondonGB4 papers
- ParisTechFR4 papers
- École Normale Supérieure de LyonFR3 papers
- Laboratoire de Physique de l'ENS de LyonFR3 papers
- Université Paris-SaclayFR3 papers
- CEA Paris-SaclayFR2 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR2 papers
- Lyon 1 UniversitéFR2 papers
25 papers
Eulerian-Lagrangian scaling of the Lyapunov exponent in homogeneous turbulence
Jin Ge, Joran Rolland, John Christos Vassilicos
We present a heuristic derivation of the maximal Lyapunov exponent of homogeneous turbulence which yields two new relations, a sweeping relation and the scaling of the uncertai…
Sea ice aging by diffusion-driven desalination
Yihong Du, Feng Wang, Enrico Calzavarini +1
Sea ice is a key component of the Earth's climate system, making its aging process an essential focus of current research. The age of sea ice is closely linked to its thermal and m…
Experimental measurement of the vorticity-strain alignment around extreme energy transfer events
Benjamin Musci, Berengere Dubrulle, Jean LeBris +5
This work experimentally explores the alignment of the vorticity vector and the strain-rate tensor eigenvectors at locations of extreme upscale and downscale energy transfer. We sh…
Active grid turbulence anomalies through the lens of physics informed neural networks
Sofía Angriman, Sarah E. Smith, Patricio Clark di Leoni +3
Active grids operated with random protocols are a standard way to generate large Reynolds number turbulence in wind and water tunnels. But anomalies in the decay and third-order sc…
Impact of ageostrophic dynamics on the predictability of Lagrangian trajectories in surface-ocean turbulence
Michael Maalouly, Guillaume Lapeyre, Stefano Berti
Turbulent flows at the surface of the ocean deviate from geostrophic equilibrium on scales smaller than about 10 km. These scales are associated with important vertical transport o…
Does rare, noise-induced, bypass transition in plane Couette flow bypass instantons ?
Joran Rolland
We study rare noise induced paths that go all the way from stable laminar to transitional turbulent plane Couette flow and investigate whether these paths share the properties of c…
The production of uncertainty in three-dimensional Navier-Stokes turbulence
Jin Ge, Joran Rolland, John-Christos Vassilicos
We derive the evolution equation of the average uncertainty energy for periodic/homogeneous incompressible Navier-Stokes turbulence and show that uncertainty is increased by strain…
A comparative evaluation of turbulence models for simulation of unsteady cavitating flows
Dhruv Apte, Mingming Ge, Olivier Coutier-Delgosha
Cavitation is a complex multiphase phenomenon characterised by vapour bubbles forming due to a sudden pressure drop and is often accompanied by increased hull vibrations, increased…
BROADCAST: A high-order compressible CFD toolbox for stability and sensitivity using Algorithmic Differentiation
Arthur Poulain, Cedric Content, Denis Sipp +2
The evolution of any complex dynamical system is described by its state derivative operators. However, the extraction of the exact N-order state derivative operators is often inacc…
Scalings of scale-by-scale turbulence energy in non-homogeneous turbulence
Jiangang Chen, John Christos Vassilicos
A theory of non-homogeneous turbulence is developed and is applied to boundary-free shear flows. The theory introduces assumptions of inner and outer similarity for the non-homogen…
Coupling rare event algorithms with data-based learned committor functions using the analogue Markov chain
Dario Lucente, Joran Rolland, Corentin Herbert +1
Rare events play a crucial role in many physics, chemistry, and biology phenomena, when they change the structure of the system, for instance in the case of multistability, or when…
Instantons and the path to intermittency in turbulent flows
André Fuchs, Corentin Herbert, Joran Rolland +3
Processes leading to anomalous fluctuations in turbulent flows, referred to as intermittency, are still challenging. We consider cascade trajectories through scales as realizations…
Collapse of transitional wall turbulence captured using a rare events algorithm
Joran Rolland
This text presents one of the first successful applications of a rare events method for the study of multistability in a turbulent flow without stochastic energy injection. The tra…
Distortion correction of two-component - two-dimensional PIV using a large imaging sensor with application to measurements of a turbulent boundary layer flow at
Bihai Sun, Muhammad Shehzad, Daniel Jovic +6
In the past decade, advances in electronics technology have made larger imaging sensors available to the experimental fluid mechanics community. These advancements have enabled the…
Nozzle dynamics and wavepackets in turbulent jets
Oğuzhan Kaplan, Peter Jordan, André Cavalieri +1
We study a turbulent jet issuing from a cylindrical nozzle to characterise coherent structures evolving in the turbulent boundary layer. The analysis is performed using data from a…
The role of Coherent Structures and Inhomogeneity in Near-Field Inter-Scale Turbulent Energy Transfers
F. Alves Portela, G. Papadakis, J. C. Vassilicos
We use DNS to study inter-scale and inter-space energy exchanges in the near-field of a turbulent wake of a square prism in terms of the KHMH equation written for a triple decompos…
Evaluation of ensemble methods for quantifying uncertainties in steady-state CFD applications with small ensemble sizes
Xinlei Zhang, Heng Xiao, Thomas Gomez +1
Bayesian uncertainty quantification (UQ) is of interest to industry and academia as it provides a framework for quantifying and reducing the uncertainty in computational models by…
The energy cascade at the turbulent/non-turbulent interface
Y. Zhou, J. C. Vassilicos
Interscale energy transfers at the vicinity of the turbulent/non-turbulent interface are from small to large scales in directions close to the interface's tangent plane where motio…
Double frame Tomographic PTV at high seeding densities
Philippe Cornic, Benjamin Leclaire, Frédéric Champagnat +4
A novel method performing 3D PTV from double frame multi-camera images is introduced. Particle velocities are estimated by following three steps. Firstly, separate particle reconst…
Unified description of turbulent entrainment
Maarten van Reeuwijk, J. Christos Vassilicos, John Craske
We present a mathematical description of turbulent entrainment that is applicable to free shear problems that evolve in space, time or both. Defining the global entrainment velocit…
Validation of a model for estimating the strength of the vortex created by a Vortex Generator from its Bound Circulation
Martin O. L. Hansen, Antonios Charalampous, Jean-Marc Foucaut +2
A hypothesis is tested and validated for predicting the vortex strength induced by a vortex generator in wall-bounded flow by combining the knowledge of the Vortex Generator (VG) g…
Universality and Thermodynamics of Turbulence
Damien Geneste, Hugues Faller, Florian Nguyen +5
We investigate universality of the Eulerian velocity structure functions using velocity fields obtained from the stereoscopic particle image velocimetry (SPIV) technique in experim…
Large-scale motions from a direct numerical simulation of a turbulent boundary layer
Ilkay Solak, Jean-Philippe Laval
A study of large-scale motions from a new direct numerical simulation database of the turbulent boundary layer up to Reθ ~ 2500 is presented. The statistics of large-scale streamwi…
Attached flow structure and streamwise energy spectra in a turbulent boundary layer
Sricharan Srinath, J. C Vassilicos, Christophe Cuvier +3
On the basis of (i) Particle Image Velocimetry data of a Turbulent Boundary Layer with large field of view and good spatial resolution and (ii) a mathematical relation between the…