Accepted author manuscript, 612 KB, PDF document
Available under license: CC BY: Creative Commons Attribution 4.0 International License
Accepted author manuscript, 211 KB, PDF document
Available under license: CC BY: Creative Commons Attribution 4.0 International License
Final published version
Licence: CC BY
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Dissipation of quasiclassical turbulence in superfluid 4He
AU - Zmeev, Dmitriy E.
AU - Walmsley, P. M.
AU - Golov, A. I.
AU - McClintock, Peter V. E.
AU - Fisher, Shaun N.
AU - Vinen, W. F.
PY - 2015/10/9
Y1 - 2015/10/9
N2 - We compare the decay of turbulence in superfluid 4He produced by a moving grid to the decay of urbulence created by either impulsive spin-down to rest or by intense ion injection. In all cases the vortex line density L decays at late time t approximately as L / -3/2. At temperatures above 0.8 K, all methods result in the same rate of decay. Below 0.8 K, the spin-down turbulence maintains initial rotation and decays slower than grid turbulence and ion-jet turbulence. This may be due to a decoupling of the large-scale superfluid flow from the normal component at low temperatures, which changes its effective boundary condition from no-slip to slip.
AB - We compare the decay of turbulence in superfluid 4He produced by a moving grid to the decay of urbulence created by either impulsive spin-down to rest or by intense ion injection. In all cases the vortex line density L decays at late time t approximately as L / -3/2. At temperatures above 0.8 K, all methods result in the same rate of decay. Below 0.8 K, the spin-down turbulence maintains initial rotation and decays slower than grid turbulence and ion-jet turbulence. This may be due to a decoupling of the large-scale superfluid flow from the normal component at low temperatures, which changes its effective boundary condition from no-slip to slip.
U2 - 10.1103/PhysRevLett.115.155303
DO - 10.1103/PhysRevLett.115.155303
M3 - Journal article
VL - 115
JO - Physical review letters
JF - Physical review letters
SN - 1079-7114
IS - 15
M1 - 155303
ER -