The instanton method and its numerical implementation in fluid mechanics
A precise characterization of structures occurring in turbulent fluid flows at high Reynolds
numbers is one of the last open problems of classical physics. In this review we discuss …
numbers is one of the last open problems of classical physics. In this review we discuss …
Classification and computation of extreme events in turbulent combustion
M Hassanaly, V Raman - Progress in Energy and Combustion Science, 2021 - Elsevier
In the design of practical combustion systems, ensuring safety and reliability is an important
requirement. For instance, reliably avoiding lean blowout, flame flashback or inlet unstart is …
requirement. For instance, reliably avoiding lean blowout, flame flashback or inlet unstart is …
Computation of extreme heat waves in climate models using a large deviation algorithm
Studying extreme events and how they evolve in a changing climate is one of the most
important current scientific challenges. Starting from complex climate models, a key difficulty …
important current scientific challenges. Starting from complex climate models, a key difficulty …
[HTML][HTML] Numerical computation of rare events via large deviation theory
T Grafke, E Vanden-Eijnden - Chaos: An Interdisciplinary Journal of …, 2019 - pubs.aip.org
An overview of rare event algorithms based on large deviation theory (LDT) is presented. It
covers a range of numerical schemes to compute the large deviation minimizer in various …
covers a range of numerical schemes to compute the large deviation minimizer in various …
Coupling rare event algorithms with data-based learned committor functions using the analogue Markov chain
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 …
they change the structure of the system, for instance in the case of multistability, or when …
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 …
laminar state or to proliferate via splitting. The average passage times from one state to the …
Scalable methods for computing sharp extreme event probabilities in infinite-dimensional stochastic systems
We introduce and compare computational techniques for sharp extreme event probability
estimates in stochastic differential equations with small additive Gaussian noise. In …
estimates in stochastic differential equations with small additive Gaussian noise. In …
Spontaneous symmetry breaking for extreme vorticity and strain in the three-dimensional Navier–Stokes equations
We investigate the spatio-temporal structure of the most likely configurations realizing
extremely high vorticity or strain in the stochastically forced three-dimensional …
extremely high vorticity or strain in the stochastically forced three-dimensional …
Rare event computation in deterministic chaotic systems using genealogical particle analysis
In this paper we address the use of rare event computation techniques to estimate small
over-threshold probabilities of observables in deterministic dynamical systems. We …
over-threshold probabilities of observables in deterministic dynamical systems. We …
Computation of rare transitions in the barotropic quasi-geostrophic equations
We investigate the theoretical and numerical computation of rare transitions in simple
geophysical turbulent models. We consider the barotropic quasi-geostrophic and two …
geophysical turbulent models. We consider the barotropic quasi-geostrophic and two …