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  • The article presents results obtained based on numerical simulation of two-dimensional vortex points and inertial tracer particles in two-component counterflowing superfluid He-II. In the low temperature limit (no normal fluid, no friction) our model would reduce to Onsager's famous vortex gas. The flow of the normal component of the He-II is assumed uniform, while the superfluid velocity field is induced by vortex points which model three-dimensional quantized vortex lines. Probability density functions of velocity and acceleration of tracer particles and superfluid velocity field are obtained. We find that tails of probability distributions follow power-laws with various exponents, except in the case of sufficiently coarse-grained superfluid velocity field, where Gaussian shape is observed. The decay of the number of vortices is also studied, yielding results in agreement with Vinen's phenomenological model of quantum turbulence.
  • The article presents results obtained based on numerical simulation of two-dimensional vortex points and inertial tracer particles in two-component counterflowing superfluid He-II. In the low temperature limit (no normal fluid, no friction) our model would reduce to Onsager's famous vortex gas. The flow of the normal component of the He-II is assumed uniform, while the superfluid velocity field is induced by vortex points which model three-dimensional quantized vortex lines. Probability density functions of velocity and acceleration of tracer particles and superfluid velocity field are obtained. We find that tails of probability distributions follow power-laws with various exponents, except in the case of sufficiently coarse-grained superfluid velocity field, where Gaussian shape is observed. The decay of the number of vortices is also studied, yielding results in agreement with Vinen's phenomenological model of quantum turbulence. (en)
Title
  • Two-dimensional simulation of vortex points and tracer particles in counterflowing He-II
  • Two-dimensional simulation of vortex points and tracer particles in counterflowing He-II (en)
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  • Two-dimensional simulation of vortex points and tracer particles in counterflowing He-II
  • Two-dimensional simulation of vortex points and tracer particles in counterflowing He-II (en)
skos:notation
  • RIV/00216208:11320/14:10289634!RIV15-MSM-11320___
http://linked.open...avai/riv/aktivita
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  • S
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
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  • 51542
http://linked.open...ai/riv/idVysledku
  • RIV/00216208:11320/14:10289634
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  • turbulence; liquid-helium; superfluid-helium (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [A410F926D4B2]
http://linked.open...v/mistoKonaniAkce
  • Kutná Hora
http://linked.open...i/riv/mistoVydani
  • CEDEX A
http://linked.open...i/riv/nazevZdroje
  • EFM13 - EXPERIMENTAL FLUID MECHANICS 2013
http://linked.open...in/vavai/riv/obor
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http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
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  • Skrbek, Ladislav
  • Varga, Emil
  • Barenghi, C. F.
  • Sergeev, Y. A.
http://linked.open...vavai/riv/typAkce
http://linked.open...ain/vavai/riv/wos
  • 000343672100127
http://linked.open.../riv/zahajeniAkce
issn
  • 2100-014X
number of pages
http://bibframe.org/vocab/doi
  • 10.1051/epjconf/20146702124
http://purl.org/ne...btex#hasPublisher
  • E D P SCIENCES
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  • 11320
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