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Quantum turbulence of bellows-driven He-4 superflow: Steady state

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10130954" target="_blank" >RIV/00216208:11320/12:10130954 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.1103/PhysRevB.86.134515" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.86.134515</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1103/PhysRevB.86.134515" target="_blank" >10.1103/PhysRevB.86.134515</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Quantum turbulence of bellows-driven He-4 superflow: Steady state

  • Original language description

    Quantum turbulence in superfluid He-4 is studied by the attenuation of second sound in flow channels of 7-mm and 10-mm side square cross sections, and 115-mm length. The ends of the channels are plugged by sintered silver superleaks to allow a pure superflow (i.e., a net flow of the superfluid component only). Flows are generated by mechanically operating a low temperature bellows assembly, as opposed to the helium fountain pump commonly used for previous superflow turbulence studies. The temperature range is 1.35 K {= T {= 1.95 K, at the saturated vapor pressure. The observed turbulent steady state is characterized by the vortex line density L-1/2 = gamma(T)(v - v(c)), where v is the mean superflow velocity and v(c) is the critical velocity for the onset of turbulence. The character of the steady state agrees with the Vinen phenomenological model for thermal counterflow turbulence. The coefficient gamma(T) is in fair agreement with previous thermal pure superflow and counterflow exper

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BK - Liquid mechanics

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/GA202%2F08%2F0276" target="_blank" >GA202/08/0276: Selected problems of cryogenic fluid dynamics</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2012

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Physical Review B - Condensed Matter and Materials Physics

  • ISSN

    1098-0121

  • e-ISSN

  • Volume of the periodical

    86

  • Issue of the periodical within the volume

    13

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    11

  • Pages from-to

  • UT code for WoS article

    000309728800007

  • EID of the result in the Scopus database