Coupling rare event algorithms with data-based learned committor functions using the analogue Markov chain

D Lucente, J Rolland, C Herbert… - Journal of Statistical …, 2022 - iopscience.iop.org
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 …

Statistical transition to turbulence in plane channel flow

S Gomé, LS Tuckerman, D Barkley - Physical Review Fluids, 2020 - APS
Intermittent turbulent-laminar patterns characterize the transition to turbulence in pipe, plane
Couette, and plane channel flows. The time evolution of turbulent-laminar bands in plane …

Extreme events in transitional turbulence

S Gomé, LS Tuckerman… - … Transactions of the …, 2022 - royalsocietypublishing.org
Transitional localized turbulence in shear flows is known to either decay to an absorbing
laminar state or to proliferate via splitting. The average passage times from one state to the …

Rare event-triggered transitions in aerodynamic bifurcation

A Gayout, M Bourgoin, N Plihon - Physical Review Letters, 2021 - APS
The transitions between two states of a bistable system are investigated experimentally and
analyzed in the framework of rare-event statistics. Considering a disk pendulum swept by a …

Bistability of the large-scale dynamics in quasi-two-dimensional turbulence

XM De Wit, A Van Kan, A Alexakis - Journal of Fluid Mechanics, 2022 - cambridge.org
In many geophysical and astrophysical flows, suppression of fluctuations along one
direction of the flow drives a quasi-two-dimensional upscale flux of kinetic energy, leading to …

Extremely rare collapse and build-up of turbulence in stochastic models of transitional wall flows

J Rolland - Physical Review E, 2018 - APS
This paper presents a numerical and theoretical study of multistability in two stochastic
models of transitional wall flows. An algorithm dedicated to the computation of rare events is …

Rare transitions to thin-layer turbulent condensates

A van Kan, T Nemoto, A Alexakis - Journal of Fluid Mechanics, 2019 - cambridge.org
Turbulent flows in a thin layer can develop an inverse energy cascade leading to spectral
condensation of energy when the layer height is smaller than a certain threshold. These …

Do extreme events trigger turbulence decay?–a numerical study of turbulence decay time in pipe flows

T Nemoto, A Alexakis - Journal of Fluid Mechanics, 2021 - cambridge.org
Turbulence locally created in laminar pipe flows shows sudden decay or splitting after a
stochastic waiting time. In laboratory experiments, the mean waiting time was observed to …

Large-deviation probabilities for correlated Gaussian processes and intermittent dynamical systems

M Massah, M Nicol, H Kantz - Physical Review E, 2018 - APS
In its classical version, the theory of large deviations makes quantitative statements about
the probability of outliers when estimating time averages, if time series data are identically …

[PDF][PDF] Extreme events trigger turbulence decay: numerical verification of extreme value theory in pipe flows

T Nemoto, A Alexakis - arXiv preprint arXiv:2005.03530, 2020 - phys.ens.fr
In pipe flow, turbulence locally created by a perturbation to laminar state shows sudden
decay or splitting after a stochastic waiting time. A conjecture has been made that this …