Speaker
Mr
Jakub Bahyl
(FMFI, UK)
Description
Liquid ${}^4\text{He}$ undergoes a second-order phase transition to the
superfluid state at $2.17\,\text{K}$. Compared to classical fluids, superfluidity allows existence of vortices with quantised circulation. These thin quantised vortex lines
can tangle to produce quantum turbulence (QT).
In this work we present measurements of QT generated by an oscillating
quartz tuning fork submerged in superfluid ${}^4\text{He}$ at various
temperatures. We quantitatively characterize QT by inferring the vortex
line density $L$ (total length of vortices per unit volume), using the
second sound attenuation method.
| Sekce | Fyzika kondenzovaných látek |
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Primary author
Mr
Jakub Bahyl
(FMFI, UK)
