Caracteristicas no lineales de cuerpos oscilantes en helio superfluido en regimen turbulento.

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Autores principales: Zemma, Elisa, Luzuriaga, Javier
Formato: Artículo PeerReviewed
Lenguaje:Inglés
Publicado: Springer
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Acceso en línea:http://ricabib.cab.cnea.gov.ar/389/2/JLTPZemmaVers2.pdf
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id I25-R131-389
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spelling I25-R131-3892013-03-22T12:27:33Z Caracteristicas no lineales de cuerpos oscilantes en helio superfluido en regimen turbulento. Turbulent flow around an oscillating body in superfluid helium: dissipation characteristics of the non linear regime. Zemma, Elisa Luzuriaga, Javier Física Quantum fluids Turbulence Turbulencia Superfluid helium Non linear oscillator Vibrating Paddle Critical velocity Velocidad crítica 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. Springer Artículo PeerReviewed application/pdf http://ricabib.cab.cnea.gov.ar/389/2/JLTPZemmaVers2.pdf en Zemma, Elisa y Luzuriaga, Javier Caracteristicas no lineales de cuerpos oscilantes en helio superfluido en regimen turbulento. / Turbulent flow around an oscillating body in superfluid helium: dissipation characteristics of the non linear regime. Journal of Low Temperature Physics . (En Prensa) http://ricabib.cab.cnea.gov.ar/389/
institution Instituto Balseiro
institution_str I-25
repository_str R-131
collection Repositorio Institucional Centro Atómico Bariloche e Instituto Balseiro (RICABIB)
language Inglés
orig_language_str_mv en
topic Física
Quantum fluids
Turbulence
Turbulencia
Superfluid helium
Non linear oscillator
Vibrating Paddle
Critical velocity
Velocidad crítica
spellingShingle Física
Quantum fluids
Turbulence
Turbulencia
Superfluid helium
Non linear oscillator
Vibrating Paddle
Critical velocity
Velocidad crítica
Zemma, Elisa
Luzuriaga, Javier
Caracteristicas no lineales de cuerpos oscilantes en helio superfluido en regimen turbulento.
topic_facet Física
Quantum fluids
Turbulence
Turbulencia
Superfluid helium
Non linear oscillator
Vibrating Paddle
Critical velocity
Velocidad crítica
format Artículo
PeerReviewed
author Zemma, Elisa
Luzuriaga, Javier
author_facet Zemma, Elisa
Luzuriaga, Javier
author_sort Zemma, Elisa
title Caracteristicas no lineales de cuerpos oscilantes en helio superfluido en regimen turbulento.
title_short Caracteristicas no lineales de cuerpos oscilantes en helio superfluido en regimen turbulento.
title_full Caracteristicas no lineales de cuerpos oscilantes en helio superfluido en regimen turbulento.
title_fullStr Caracteristicas no lineales de cuerpos oscilantes en helio superfluido en regimen turbulento.
title_full_unstemmed Caracteristicas no lineales de cuerpos oscilantes en helio superfluido en regimen turbulento.
title_sort caracteristicas no lineales de cuerpos oscilantes en helio superfluido en regimen turbulento.
publisher Springer
url http://ricabib.cab.cnea.gov.ar/389/2/JLTPZemmaVers2.pdf
work_keys_str_mv AT zemmaelisa caracteristicasnolinealesdecuerpososcilantesenheliosuperfluidoenregimenturbulento
AT luzuriagajavier caracteristicasnolinealesdecuerpososcilantesenheliosuperfluidoenregimenturbulento
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