SEMINARIO - VORTEX RINGS LIFETIME ENHANCED BY FRICTION INTERACTION IN SUPERFLUID HELIUM - Dr. Luca Galantucci
In ordinary systems, friction forces slow down the speed of structures and reduce their lifetime. This is not necessarily the case in superfluid helium. Using a new fully-coupled theoretical description of the mutual friction interaction between superfluid and normal fluid components, here we explain why a bundle of vortex rings moving in superfluid helium at finite temperature travels at constant speed a significant distance, as observed in the laboratory, and in contrast to predictions of previous models describing a quick decay of the vortex bundle.
Date and place of the event
25/02/2021 at 11.30: Zoom telematic seminar at the address:
https://uniroma1.zoom.us/j/82266908190?pwd=VXM3YnY5ZEN6S2NFTm95UDRVRTZaUT09
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