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

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Energy and angular momentum balance in wall-bounded quantum turbulence at very low temperatures. / Hosio, J.J.; Eltsov, V.B.; Heikkinen, P.J.; Hänninen, R.; Krusius, M.; "L'vov", V.S.

In: Nature Communications, Vol. 4, 1614, 2013, p. 1-5.

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Hosio, J.J. ; Eltsov, V.B. ; Heikkinen, P.J. ; Hänninen, R. ; Krusius, M. ; "L'vov", V.S. / Energy and angular momentum balance in wall-bounded quantum turbulence at very low temperatures. In: Nature Communications. 2013 ; Vol. 4. pp. 1-5.

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@article{8f0dce2afae041a286e74d4b51eb6774,
title = "Energy and angular momentum balance in wall-bounded quantum turbulence at very low temperatures",
abstract = "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.",
keywords = "SUPERFLUID HE-3-B, SUPERFLUID HE-3-B, SUPERFLUID HE-3-B",
author = "J.J. Hosio and V.B. Eltsov and P.J. Heikkinen and R. H{\"a}nninen and M. Krusius and V.S. {"}L'vov{"}",
year = "2013",
doi = "10.1038/ncomms2618",
language = "English",
volume = "4",
pages = "1--5",
journal = "Nature Communications",
issn = "2041-1723",

}

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TY - JOUR

T1 - Energy and angular momentum balance in wall-bounded quantum turbulence at very low temperatures

AU - Hosio, J.J.

AU - Eltsov, V.B.

AU - Heikkinen, P.J.

AU - Hänninen, R.

AU - Krusius, M.

AU - "L'vov", V.S.

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

KW - SUPERFLUID HE-3-B

KW - SUPERFLUID HE-3-B

KW - SUPERFLUID HE-3-B

UR - http://www.nature.com/ncomms/journal/v4/n3/pdf/ncomms2618.pdf

U2 - 10.1038/ncomms2618

DO - 10.1038/ncomms2618

M3 - Article

VL - 4

SP - 1

EP - 5

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

M1 - 1614

ER -

ID: 819070