Instantons and the path to intermittency ...
Document type :
Article dans une revue scientifique: Article original
Title :
Instantons and the path to intermittency in turbulent flows
Author(s) :
Fuchs, André [Auteur]
Institut für Physik [Oldenburg]
Herbert, Corentin [Auteur]
Laboratoire de Physique de l'ENS Lyon [Phys-ENS]
Rolland, Joran [Auteur]
Laboratoire de Mécanique des Fluides de Lille - Kampé de Fériet [LMFL]
Wächter, Matthias [Auteur]
Institut für Physik [Oldenburg]
Bouchet, Freddy [Auteur]
Laboratoire de Physique de l'ENS Lyon [Phys-ENS]
Peinke, Joachim [Auteur]
Institut für Physik [Oldenburg]
Institut für Physik [Oldenburg]
Herbert, Corentin [Auteur]
Laboratoire de Physique de l'ENS Lyon [Phys-ENS]
Rolland, Joran [Auteur]
Laboratoire de Mécanique des Fluides de Lille - Kampé de Fériet [LMFL]
Wächter, Matthias [Auteur]
Institut für Physik [Oldenburg]
Bouchet, Freddy [Auteur]
Laboratoire de Physique de l'ENS Lyon [Phys-ENS]
Peinke, Joachim [Auteur]
Institut für Physik [Oldenburg]
Journal title :
Physical Review Letters
Pages :
034502
Publisher :
American Physical Society
Publication date :
2022-07-13
ISSN :
0031-9007
HAL domain(s) :
Physique [physics]/Mécanique [physics]/Mécanique des fluides [physics.class-ph]
Physique [physics]/Physique [physics]/Dynamique des Fluides [physics.flu-dyn]
Physique [physics]/Physique [physics]/Analyse de données, Statistiques et Probabilités [physics.data-an]
Physique [physics]/Matière Condensée [cond-mat]/Mécanique statistique [cond-mat.stat-mech]
Physique [physics]/Physique [physics]/Dynamique des Fluides [physics.flu-dyn]
Physique [physics]/Physique [physics]/Analyse de données, Statistiques et Probabilités [physics.data-an]
Physique [physics]/Matière Condensée [cond-mat]/Mécanique statistique [cond-mat.stat-mech]
English abstract : [en]
The physical processes leading to anomalous fluctuations in turbulent flows, referred to as intermittency, are still challenging. Here, we use an approach based on instanton theory for the velocity increment dynamics through ...
Show more >The physical processes leading to anomalous fluctuations in turbulent flows, referred to as intermittency, are still challenging. Here, we use an approach based on instanton theory for the velocity increment dynamics through scales. Cascade trajectories with negative stochastic thermodynamics entropy exchange values lead to anomalous increments at small-scales. These trajectories concentrate around an instanton, which is the minimum of an effective action produced by turbulent fluctuations. The connection between entropy from stochastic thermodynamics and the related instanton provides a new perspective on the cascade process and the intermittency phenomenon.Show less >
Show more >The physical processes leading to anomalous fluctuations in turbulent flows, referred to as intermittency, are still challenging. Here, we use an approach based on instanton theory for the velocity increment dynamics through scales. Cascade trajectories with negative stochastic thermodynamics entropy exchange values lead to anomalous increments at small-scales. These trajectories concentrate around an instanton, which is the minimum of an effective action produced by turbulent fluctuations. The connection between entropy from stochastic thermodynamics and the related instanton provides a new perspective on the cascade process and the intermittency phenomenon.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
European Project :
Source :
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