Je suis professeur des universités à Centrale Lille Institut depuis septembre 2025 après y avoir été maître de conférences (2020 - 2025). J'exerce ma recherche au laboratoire de mécanique des fluides de Lille (LMFL). J'enseigne régulièrement dans le cycle ingénieur de l'école Centrale de Lille et dans le master international de turbulence et j'ai enseigné ponctuellement dans le cycle préparatoire intégré de l'école de chimie de Lille (2023 - 2025).
Je travaille principalement à l'étude d'évènements extrêmes et rares en turbulence, en particulier dans des écoulements multistables d'origine aérodynamique ou géophysique. Ces écoulements sont confrontés à des "points de bascules", sous divers contraintes, que l'on cherche à caractériser. Pour cela, j'ai développé des codes de simulation des évènements rares, qui permettent une accélération drastique de ces simulations et une amélioration significative de l'estimation de leur probabilité d'occurence.
Characterisation of a multistable turbulent wake: application of an improved regime identification with analytical model training
2026
Ariane Barlet,Pierre Bragança,Christophe Cuvier,Joran Rolland
Eulerian-Lagrangian scaling of the Lyapunov exponent in homogeneous turbulence
Physical Review Fluids, 2025, ⟨10.1103/zv93-zkkv⟩
Jin Ge,Joran Rolland,John Christos Vassilicos
The interscale behaviour of uncertainty in three-dimensional Navier-Stokes turbulence
Journal of Fluid Mechanics, In press
Jin Ge,Joran Rolland,John Christos Vassilicos
Does rare, noise-induced, bypass transition in plane Couette flow bypass instantons ?
2024
Joran Rolland
The production of uncertainty in three-dimensional Navier-Stokes turbulence
Journal of Fluid Mechanics, 2023, 977 (A17)
Jin Ge,Joran Rolland,John-Christos Vassilicos
Rare events and waves in models and turbulent flows
Mechanics [physics]. Université de Lille, 2022
Joran Rolland
Coupling rare event algorithms with data-based learned committor functions using the analogue Markov chain
Journal of Statistical Mechanics: Theory and Experiment, 2022, 2022, pp.083201. ⟨10.1088/1742-5468/ac7aa7⟩
Dario Lucente,Joran Rolland,Corentin Herbert,Freddy Bouchet
Collapse of transitional wall turbulence captured using a rare events algorithm
Journal of Fluid Mechanics, 2022, 931, pp.A22. ⟨10.1017/jfm.2021.957⟩
Joran Rolland
Instantons and the path to intermittency in turbulent flows
Physical Review Letters, 2022, 129, pp.034502. ⟨10.1103/PhysRevLett.129.034502⟩
André Fuchs,Corentin Herbert,Joran Rolland,Matthias Wächter,Freddy Bouchet,Joachim Peinke
Multistability and rare spontaneous transitions in barotropic β-plane turbulence
Journal of the Atmospheric Sciences, 2021, ⟨10.1175/JAS-D-20-0279.1⟩
Eric Simonnet,Joran Rolland,Freddy Bouchet
MACHINE LEARNING OF COMMITTOR FUNCTIONS FOR PREDICTING HIGH IMPACT CLIMATE EVENTS
Climate Informatics, Oct 2019, Paris, France
Dario Lucente,Stefan Duffner,Corentin Herbert,Joran Rolland,Freddy Bouchet
A rare event algorithm links transitions in turbulent flows with activated nucleations
Physical Review Letters, 2019, 122, pp.074502. ⟨10.1103/PhysRevLett.122.074502⟩
Freddy Bouchet,Joran Rolland,Eric Simonnet
Extremely rare collapse and build-up of turbulence in stochastic models of transitional wall flows
Physical Review E , 2018, 97 (1), pp.023109. ⟨10.1103/PhysRevE.97.023109⟩
Joran Rolland
Finite size analysis of a double crossover in transitional wall turbulence
Journal of Statistical Mechanics: Theory and Experiment, 2018, 2018 (9), pp.093207. ⟨10.1088/1742-5468/aaddab⟩
Joran Rolland
Mechanical and statistical study of the laminar hole formation in transitional plane Couette flow
The European Physical Journal B: Condensed Matter and Complex Systems, 2015, 88 (3), pp.66. ⟨10.1140/epjb/e2015-50344-y⟩
Joran Rolland
Stochastic analysis of the time evolution of laminar-turbulent bands of plane Couette flow.
European Physical Journal E: Soft matter and biological physics, 2015, 38 (11), pp.121. ⟨10.1140/epje/i2015-15121-5⟩
Joran Rolland
Computing transition rates for the 1-D stochastic Ginzburg–Landau–Allen–Cahn equation for finite-amplitude noise with a rare event algorithm
Journal of Statistical Physics, 2015, ⟨10.1007/s10955-015-1417-4⟩
Joran Rolland,Freddy Bouchet,Eric Simonnet
Turbulent spot growth in plane Couette flow: statistical study and formation of spanwise vorticity
Fluid Dynamics Research, 2014, 46 (1), ⟨10.1088/0169-5983/46/1/015512⟩
Joran Rolland
Formation of spanwise vorticy in oblique turbulent bands of transitional plane Couette flow, part 1: Numerical experiments
European Journal of Mechanics - B/Fluids, 2014, 50C, pp.52. ⟨10.1016/j.euromechflu.2014.11.007⟩
Joran Rolland
Etude numérique à petite et grande échelle de la bande laminaire-turbulente de l'écoulement de Couette plan transitionnel
Dynamique des Fluides [physics.flu-dyn]. Ecole Polytechnique X, 2012. Français. ⟨NNT : ⟩
Joran Rolland
Turbulent pattern formation in plane Couette flow: Modelling and investigation of mechanisms
13th European Turbulence Conference (ETC13), Sep 2011, Warsaw, Poland. pp.032034, ⟨10.1088/1742-6596/318/3/032034⟩
Joran Rolland,Paul Manneville
On modelling transitional turbulent flows using under-resolved direct numerical simulations: the case of plane Couette flow
Theoretical and Computational Fluid Dynamics, 2011, 25 (6), pp.407-420. ⟨10.1007/s00162-010-0215-5⟩
Paul Manneville,Joran Rolland
Ginzburg-Landau description of laminar-turbulent oblique band formation in transitional plane Couette flow
The European Physical Journal B: Condensed Matter and Complex Systems, 2011, 80 (4), pp.529-544. ⟨10.1140/epjb/e2011-10730-1⟩
Joran Rolland,Paul Manneville
Pattern Fluctuations in Transitional Plane Couette Flow
Journal of Statistical Physics, 2011, 142 (3), pp.577-591. ⟨10.1007/s10955-011-0126-x⟩
Joran Rolland,Paul Manneville