Active grid turbulence anomalies through ...
Document type :
Article dans une revue scientifique: Article original
Title :
Active grid turbulence anomalies through the lens of physics informed neural networks
Author(s) :
Angriman, Sofía [Auteur]
Universidad de Buenos Aires [Buenos Aires] [UBA]
Smith, Sarah [Auteur]
University of Newcastle [Callaghan, Australia] [UoN]
Di Leoni, Patricio [Auteur]
Cobelli, Pablo [Auteur]
Instituto de Física de Buenos Aires [IFIBA]
Universidad de Buenos Aires [Buenos Aires] [UBA]
Mininni, Pablo [Auteur]
Departamento de Física [Universidad de Buenos Aires]
Obligado, Martín [Auteur]
Laboratoire de Mécanique des Fluides de Lille - Kampé de Fériet [LMFL]
Laboratoire des Écoulements Géophysiques et Industriels [Grenoble] [LEGI]
Universidad de Buenos Aires [Buenos Aires] [UBA]
Smith, Sarah [Auteur]
University of Newcastle [Callaghan, Australia] [UoN]
Di Leoni, Patricio [Auteur]
Cobelli, Pablo [Auteur]
Instituto de Física de Buenos Aires [IFIBA]
Universidad de Buenos Aires [Buenos Aires] [UBA]
Mininni, Pablo [Auteur]
Departamento de Física [Universidad de Buenos Aires]
Obligado, Martín [Auteur]
Laboratoire de Mécanique des Fluides de Lille - Kampé de Fériet [LMFL]
Laboratoire des Écoulements Géophysiques et Industriels [Grenoble] [LEGI]
Journal title :
Results in engineering
Pages :
103265
Publisher :
Elsevier B.V.
Publication date :
2024-12
ISSN :
2590-1230
English keyword(s) :
Fluid Dynamics
FOS: Physical sciences
Turbulence
FOS: Physical sciences
Turbulence
HAL domain(s) :
Sciences de l'ingénieur [physics]
English abstract : [en]
Active grids operated with random protocols are a standard way to generate large Reynolds number turbulence in wind and water tunnels. But anomalies in the decay and third-order scaling of active-grid turbulence have been ...
Show more >Active grids operated with random protocols are a standard way to generate large Reynolds number turbulence in wind and water tunnels. But anomalies in the decay and third-order scaling of active-grid turbulence have been reported. We combine Laser Doppler Velocimetry and hot-wire anemometry measurements in a wind tunnel, with machine learning techniques and numerical simulations, to gain further understanding on the reasons behind these anomalies. Numerical simulations that incorporate the statistical anomalies observed in the experimental velocity field near the active grid can reproduce the experimental anomalies observed later in the decay. The results indicate that anomalies in experiments near the active grid introduce correlations in the flow that can persist for long times.Show less >
Show more >Active grids operated with random protocols are a standard way to generate large Reynolds number turbulence in wind and water tunnels. But anomalies in the decay and third-order scaling of active-grid turbulence have been reported. We combine Laser Doppler Velocimetry and hot-wire anemometry measurements in a wind tunnel, with machine learning techniques and numerical simulations, to gain further understanding on the reasons behind these anomalies. Numerical simulations that incorporate the statistical anomalies observed in the experimental velocity field near the active grid can reproduce the experimental anomalies observed later in the decay. The results indicate that anomalies in experiments near the active grid introduce correlations in the flow that can persist for long times.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Source :
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