Zobrazeno 1 - 10
of 122
pro vyhledávání: '"Golov, A. I."'
We present a numerical study, using the vortex filament model, of vortex tangles in a flow of pure superfluid $^4$He in the $T = 0$ limit through a channel of width $D = 1$ mm for various applied velocities $V$. The flat channel walls are assumed to
Externí odkaz:
http://arxiv.org/abs/2402.09562
Autor:
Guo, Wei, Golov, Andrei I.
Publikováno v:
Phys. Rev. B 101, 064515 (2020)
Metastable He$_{2}^{*}$ excimer molecules have been utilized as tracer particles of the normal component in superfluid $^4$He (He II) which can be imaged via laser-induced fluorescence. These excimer molecules form tiny bubbles in He II and can bind
Externí odkaz:
http://arxiv.org/abs/2001.05625
Akademický článek
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Autor:
Walmsley, P. M., Golov, A. I.
Publikováno v:
Phys. Rev. Lett. 118, 134501 (2017)
Tangles of quantized vortex line of initial density ${\cal L}(0) \sim 6\times 10^3$\,cm$^{-2}$ and variable amplitude of fluctuations of flow velocity $U(0)$ at the largest length scale were generated in superfluid $^4$He at $T=0.17$\,K, and their fr
Externí odkaz:
http://arxiv.org/abs/1703.03645
Publikováno v:
Phys. Rev. Fluids 1, 044502 (2016)
We have used the vortex filament method to numerically investigate the interactions between pairs of quantized vortex rings that are initially traveling in the same direction but with their axes offset by a variable impact parameter. The interaction
Externí odkaz:
http://arxiv.org/abs/1603.04313
Autor:
Zmeev, D. E., Walmsley, P. M., Golov, A. I., McClintock, P. V. E., Fisher, S. N., Vinen, W. F.
Publikováno v:
Phys. Rev. Lett. 115, 155303 (2015)
We compare the decay of turbulence in superfluid $^4$He produced by a moving grid to the decay of turbulence 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 $t$ a
Externí odkaz:
http://arxiv.org/abs/1509.00813
Publikováno v:
J. Low Temp. Phys. 183, 106 (2016)
We have measured the response of a torsional oscillator containing polycrystalline hcp solid $^{4}$He to applied steady rotation in an attempt to verify the observations of several other groups that were initially interpreted as evidence for macrosco
Externí odkaz:
http://arxiv.org/abs/1508.03947
Publikováno v:
Journal of Low Temperature Physics; Jun2024, Vol. 215 Issue 5/6, p452-464, 13p
Autor:
Fear, M. J., Walmsley, P. M., Chorlton, D. A., Zmeev, D. E., Gillott, S. J., Sellers, M. C., Richardson, P. P., Agrawal, H., Batey, G., Golov, A. I.
Publikováno v:
Rev. Sci. Instrum. 84, 103905 (2013)
We describe the design and performance of a new rotating dilution refrigerator that will primarily be used for investigating the dynamics of quantized vortices in superfluid 4He. All equipment required to operate the refrigerator and perform experime
Externí odkaz:
http://arxiv.org/abs/1309.3089
Publikováno v:
Phys. Rev. Lett. 113, 125302 (2014)
Collisions in a beam of unidirectional quantized vortex rings of nearly identical radii $R$ in superfluid $^4$He in the limit of zero temperature (0.05 K) were studied using time-of-flight spectroscopy. Reconnections between two primary rings result
Externí odkaz:
http://arxiv.org/abs/1308.6171