Turbulent flow around an oscillating body in superfluid helium: dissipation characteristics of the nonlinear regime

By examining the resonance curves of an oscillator submerged in superfluid liquid helium, it is found that their shape is affected by two distinct dissipation regimes when the amplitude is large enough to generate turbulence in the liquid. In a resonance curve, the central part close to resonance, m...

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Detalles Bibliográficos
Autores: Zemma, Elisa María, Luzuriaga, Javier
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/26669
Acceso en línea:http://hdl.handle.net/11336/26669
Access Level:acceso abierto
Palabra clave:Quantum Fluids
Turbulence
Superfluid Helium
Nonlinear Oscillator
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
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spelling Turbulent flow around an oscillating body in superfluid helium: dissipation characteristics of the nonlinear regime Zemma, Elisa María Luzuriaga, Javier Quantum Fluids Turbulence Superfluid Helium Nonlinear Oscillator https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 By examining the resonance curves of an oscillator submerged in superfluid liquid helium, it is found that their shape is affected by two distinct dissipation regimes when the amplitude is large enough to generate turbulence in the liquid. In a resonance curve, the central part close to resonance, may be in a turbulent regime, but the response is of much lower amplitude away from the resonance frequency, so that the oscillation can still be in the linear regime for frequencies not exactly at resonance. This introduces an ambiguity in estimating the inverse quality factor Q − 1 of the oscillator. By analyzing experimental data we consider a way of matching the two ways of estimating Q − 1 and use the information to evaluate the frictional force as a function of velocity in a silicon paddle oscillator generating turbulence in the superfluid. Fil: Zemma, Elisa María. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Luzuriaga, Javier. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Springer http://hdl.handle.net/11336/26669 Zemma, Elisa María; Luzuriaga, Javier; Turbulent flow around an oscillating body in superfluid helium: dissipation characteristics of the nonlinear regime; Springer; Journal of Low Temperature Physics; 172; 3-4; 1-2013; 256-265 0022-2291 CONICET Digital CONICET
title Turbulent flow around an oscillating body in superfluid helium: dissipation characteristics of the nonlinear regime
spellingShingle Turbulent flow around an oscillating body in superfluid helium: dissipation characteristics of the nonlinear regime
Zemma, Elisa María
Quantum Fluids
Turbulence
Superfluid Helium
Nonlinear Oscillator
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
title_short Turbulent flow around an oscillating body in superfluid helium: dissipation characteristics of the nonlinear regime
title_full Turbulent flow around an oscillating body in superfluid helium: dissipation characteristics of the nonlinear regime
title_fullStr Turbulent flow around an oscillating body in superfluid helium: dissipation characteristics of the nonlinear regime
title_full_unstemmed Turbulent flow around an oscillating body in superfluid helium: dissipation characteristics of the nonlinear regime
title_sort Turbulent flow around an oscillating body in superfluid helium: dissipation characteristics of the nonlinear regime
author Zemma, Elisa María
author_facet Zemma, Elisa María
Luzuriaga, Javier
author_role author
author2 Luzuriaga, Javier
author2_role author
topic Quantum Fluids
Turbulence
Superfluid Helium
Nonlinear Oscillator
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
topic_facet Quantum Fluids
Turbulence
Superfluid Helium
Nonlinear Oscillator
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
description By examining the resonance curves of an oscillator submerged in superfluid liquid helium, it is found that their shape is affected by two distinct dissipation regimes when the amplitude is large enough to generate turbulence in the liquid. In a resonance curve, the central part close to resonance, may be in a turbulent regime, but the response is of much lower amplitude away from the resonance frequency, so that the oscillation can still be in the linear regime for frequencies not exactly at resonance. This introduces an ambiguity in estimating the inverse quality factor Q − 1 of the oscillator. By analyzing experimental data we consider a way of matching the two ways of estimating Q − 1 and use the information to evaluate the frictional force as a function of velocity in a silicon paddle oscillator generating turbulence in the superfluid.
publishDate 2013
format article
status_str publishedVersion
url http://hdl.handle.net/11336/26669
identifier_str_mv Zemma, Elisa María; Luzuriaga, Javier; Turbulent flow around an oscillating body in superfluid helium: dissipation characteristics of the nonlinear regime; Springer; Journal of Low Temperature Physics; 172; 3-4; 1-2013; 256-265
0022-2291
CONICET Digital
CONICET
language eng
eu_rights_str_mv openAccess
publisher Springer
institution Consejo Nacional de Investigaciones Científicas y Técnicas
collection CONICET Digital (CONICET)
reponame_str CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
_version_ 1878403513046794240
publishDateSort 2013
author_browse Luzuriaga, Javier
Zemma, Elisa María
publisherStr Springer
score 6,9460754

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