Energy and angular momentum balance in wall-bounded quantum turbulence at very low temperatures

J.J. Hosio, V.B. Eltsov, P.J. Heikkinen, R. Hänninen, M. Krusius, V.S. "L'vov"

    Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

    13 Sitaatiot (Scopus)
    111 Lataukset (Pure)

    Abstrakti

    A superfluid in the absence of a viscous normal component should be the best realization of an ideal inviscid Euler fluid. As expressed by d’Alembert’s famous paradox, an ideal fluid does not drag on bodies past which it flows, or in other words it does not exchange momentum with them. In addition, the flow of an ideal fluid does not dissipate kinetic energy. Here we study experimentally whether these properties apply to the flow of superfluid 3He-B in a rotating cylinder at low temperatures. It is found that ideal behaviour is broken by quantum turbulence, which leads to substantial energy dissipation, as was also observed earlier. Remarkably, the angular momentum exchange between the superfluid and its container approaches nearly ideal behaviour, as the drag almost disappears in the zero-temperature limit. Here the mismatch between energy and angular momentum transfer results in a new physical situation, with severe implications on the flow dynamics.
    AlkuperäiskieliEnglanti
    Artikkeli1614
    Sivut1-5
    JulkaisuNature Communications
    Vuosikerta4
    DOI - pysyväislinkit
    TilaJulkaistu - 2013
    OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

    Tutkimusalat

    • SUPERFLUID HE-3-B

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