A specific feature of turbulence in quasi-2D flows is the spontaneous emergence of large scale coherent structures, such as those observed in planetary atmospheres, for instance.
Josh Sokol, a reporter for Quanta Magazine, has written an article …
read moreOur paper about mean-flow/turbulence interaction in the context of the 2D vortex condensate has just been published in Physical Review Letters. In this paper, we provide explicit formulae for the Reynolds stress tensor in the inertial limit, and test those formulae againt Direct Numerical Simulations.
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read moreOur paper about the computation of return times with rare event algorithms has just been published in the Journal of Statistical Mechanics.
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Computing return times or return periods with rare event algorithms
Thibault Lestang, Francesco Ragone, Charles-Edouard Bréhier, Corentin Herbert, Freddy Bouchet
read moreRather than talking about the probability of occurrence of an event, it is more meaningful in many applications to talk about its return time: it is the average time between two occurrences of the event. Reliably estimating return times for rare events from observational data is very difficult, precisely because …
read moreThe structure of turbulence in the presence of a mean-flow is a fundamental question that remains poorly understood. Even in the most basic setting of a pressure driven pipe flow, a first-principles description is lacking. The main problem is that at high Reynolds numbers, the interactions between the mean-flow and …
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